Geografic-Information-System/gui/wxpython/gui_modules/dbm.py

"""
@package dbm.py

@brief GRASS Attribute Table Manager

This program is based on FileHunter, published in 'The wxPython Linux
Tutorial' on wxPython WIKI pages.

It also uses some functions at
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/426407

@code
python dbm.py vector@mapset
@endcode

List of classes:
 - Log
 - VirtualAttributeList
 - AttributeManager
 - DisplayAttributesDialog
 - VectorDBInfo
 - ModifyTableRecord

(C) 2007-2008 by the GRASS Development Team

This program is free software under the GNU General Public
License (>=v2). Read the file COPYING that comes with GRASS
for details.

@author Jachym Cepicky <jachym.cepicky gmail.com>
@author Martin Landa <landa.martin gmail.com>
"""

import sys
import os
import locale
import tempfile
import copy

### i18N
import gettext
gettext.install('grasswxpy', os.path.join(os.getenv("GISBASE"), 'locale'), unicode=True)

import globalvar
globalvar.CheckForWx()

import wx
import wx.lib.mixins.listctrl as listmix
import wx.lib.flatnotebook as FN
import wx.lib.scrolledpanel as scrolled

import sqlbuilder
import gcmd
import utils
import gdialogs
import gselect
from debug import Debug as Debug
from preferences import globalSettings as UserSettings

def unicodeValue(value):
    """Encode value"""
    enc = UserSettings.Get(group='atm', key='encoding', subkey='value')
    if enc:
        value = unicode(value, enc)
    elif os.environ.has_key('GRASS_DB_ENCODING'):
        value = unicode(value, os.environ['GRASS_DB_ENCODING'])
    else:
        try:
            value = unicode(value, 'ascii')
        except UnicodeDecodeError:
            value = _("Unable to decode value. Set encoding in GUI preferences ('Attributes').")
    
    return value

class Log:
    """
    The log output is redirected to the status bar of the containing frame.
    """
    def __init__(self, parent):
        self.parent = parent

    def write(self, text_string):
        """Update status bar"""
        self.parent.SetStatusText(text_string.strip())


class VirtualAttributeList(wx.ListCtrl,
                           listmix.ListCtrlAutoWidthMixin,
                           listmix.ColumnSorterMixin):
    """
    Support virtual list class
    """
    def __init__(self, parent, log, mapDBInfo, layer):
        #
        # initialize variables
        #
        self.parent  = parent
        self.log     = log
        self.mapDBInfo = mapDBInfo
        self.layer   = layer
        
        self.columns = {} # <- LoadData()

        wx.ListCtrl.__init__(self, parent=parent, id=wx.ID_ANY,
                             style=wx.LC_REPORT | wx.LC_HRULES |
                             wx.LC_VRULES | wx.LC_VIRTUAL | wx.LC_SORT_ASCENDING)
        
        try:
            keyColumn = self.LoadData(layer)
        except gcmd.DBMError, e:
            e.Show()
            return
        
        #
        # add some attributes (colourful background for each item rows)
        #
        self.attr1 = wx.ListItemAttr()
        self.attr1.SetBackgroundColour(wx.Colour(238,238,238))
        self.attr2 = wx.ListItemAttr()
        self.attr2.SetBackgroundColour("white")
        self.il = wx.ImageList(16, 16)
        self.sm_up = self.il.Add(wx.ArtProvider_GetBitmap(wx.ART_GO_UP,   wx.ART_TOOLBAR,
                                                          (16,16)))
        self.sm_dn = self.il.Add(wx.ArtProvider_GetBitmap(wx.ART_GO_DOWN, wx.ART_TOOLBAR,
                                                          (16,16)))
        self.SetImageList(self.il, wx.IMAGE_LIST_SMALL)
        
        # setup mixins
        listmix.ListCtrlAutoWidthMixin.__init__(self)
        listmix.ColumnSorterMixin.__init__(self, len(self.columns))

        # sort item by category (id)
        if keyColumn > -1:
            self.SortListItems(col=keyColumn, ascending=True) 
        else:
            self.SortListItems(col=0, ascending=True) 
        
        # events
        self.Bind(wx.EVT_LIST_ITEM_SELECTED,   self.OnItemSelected)
        self.Bind(wx.EVT_LIST_ITEM_DESELECTED, self.OnItemDeselected)
        self.Bind(wx.EVT_LIST_COL_CLICK,       self.OnColumnClick)     # sorting
        
    def Update(self, mapDBInfo):
        """Update list according new mapDBInfo description"""
        self.mapDBInfo = mapDBInfo
        self.LoadData(self.layer)

    def LoadData(self, layer, columns=None, where=None):
        """Load data into list

        @param layer layer number
        @param columns list of columns for output
        @param where where statement
        
        @return id of key column 
        @return -1 if key column is not displayed
        """
        self.log.write(_("Loading data..."))
        
        tableName    = self.mapDBInfo.layers[layer]['table']
        keyColumn    = self.mapDBInfo.layers[layer]['key']
        try:
            self.columns = self.mapDBInfo.tables[tableName]
        except KeyError:
            raise gcmd.DBMError(message=_("Attribute table <%s> not found. "
                                          "For creating the table switch to "
                                          "'Manage layers' tab.") % tableName,
                                parent=self.parent)
        
        cmd = ["v.db.select",
               "-c", "--q",
               "map=%s" % self.mapDBInfo.map,
               "layer=%d" % layer]
               
        if not columns:
            columns = self.mapDBInfo.GetColumns(tableName)
        else:
            all = self.mapDBInfo.GetColumns(tableName)
            cmd.append("columns=%s" % ','.join(columns))
            for col in columns:
                if col not in all:
                    wx.MessageBox(parent=self,
                                  message=_("Column <%(column)s> not found in "
                                            "in the table <%(table)s>.") % \
                                      { 'column' : col, 'table' : tableName },
                                  caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                    return


        if where:
            cmd.append("where=%s" % where)
        
        try:
            # for maps connected via v.external
            keyId = columns.index(keyColumn)
        except:
            keyId = -1
        
        #
        # read data
        #
        # FIXME: Max. number of rows, while the GUI is still usable

        # stdout can be very large, do not use PIPE, redirect to temp file
        # TODO: more effective way should be implemented...
        outFile = tempfile.NamedTemporaryFile(mode='w+b')
        
        selectCommand = gcmd.Command(cmd,
                                     stdout=outFile)

        # These two should probably be passed to init more cleanly
        # setting the numbers of items = number of elements in the dictionary
        self.itemDataMap  = {}
        self.itemIndexMap = []
        self.itemCatsMap  = {}
        
        self.DeleteAllItems()
        
        # self.ClearAll()
        for i in range(self.GetColumnCount()):
            self.DeleteColumn(0)
        
        i = 0
        info = wx.ListItem()
        info.m_mask = wx.LIST_MASK_TEXT | wx.LIST_MASK_IMAGE | wx.LIST_MASK_FORMAT
        info.m_image = -1
        info.m_format = 0
        for column in columns:
            info.m_text = column
            self.InsertColumnInfo(i, info)
            i += 1
            
            if i >= 256:
                self.log.write(_("Can display only 256 columns."))
        
        i = 0
        outFile.seek(0)
        
        while True:
            # os.linesep doesn't work here (MSYS)
            record = outFile.readline().replace('\n', '')
            if not record:
                break
            
            self.itemDataMap[i] = []
            j = 0
            
            for value in record.split('|'):
                # casting ...
                if self.columns[columns[j]]['ctype'] != type(''):
                    try:
                        self.itemDataMap[i].append(self.columns[columns[j]]['ctype'] (value))
                    except ValueError:
                        self.itemDataMap[i].append('')
                else:
                    try:
                        self.itemDataMap[i].append(unicodeValue(value))
                    except UnicodeDecodeError:
                        self.itemDataMap[i].append(_("Unable to decode value. "
                                                     "Set encoding in GUI preferences ('Attributes')."))
                
                if keyId > -1 and keyId == j:
                    try:
                        cat = self.columns[columns[j]]['ctype'] (value)
                    except ValueError, e:
                        cat = -1
                        wx.MessageBox(parent=self,
                                      message=_("Error loading attribute data. "
                                                "Record number: %(rec)d. Unable to cast value '%(val)s' in "
                                                "key column (%(key)s) to integer.\n\n"
                                                "Details: %(detail)s") % \
                                          { 'rec' : i + 1, 'val' : value,
                                            'key' : keyColumn, 'detail' : e},
                                      caption=_("Error"),
                                      style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                j += 1

            # insert to table
            # index = self.InsertStringItem(index=sys.maxint, label=str(self.itemDataMap[i][0]))
            # for j in range(len(self.itemDataMap[i][1:])):
            # self.SetStringItem(index=index, col=j+1, label=str(self.itemDataMap[i][j+1]))
                
            # self.SetItemData(item=index, data=i)
            
            self.itemIndexMap.append(i)
            if keyId > -1: # load cats only when LoadData() is called first time
                self.itemCatsMap[i] = cat

            i += 1
            if i >= 100000:
                self.log.write(_("Limit 100000 records."))
                break

        self.SetItemCount(i)
        
        i = 0
        for col in columns:
            width = self.columns[col]['length'] * 6 # FIXME
            if width < 60:
                width = 60
            if width > 300:
                width = 300
            self.SetColumnWidth(col=i, width=width)
            i += 1

        self.SendSizeEvent()

        self.log.write(_("Number of loaded records: %d") % \
                           self.GetItemCount())
        
        return keyId
    
    def OnItemSelected(self, event):
        """Item selected. Add item to selected cats..."""
        #         cat = int(self.GetItemText(event.m_itemIndex))
        #         if cat not in self.selectedCats:
        #             self.selectedCats.append(cat)
        #             self.selectedCats.sort()
        
        event.Skip()

    def OnItemDeselected(self, event):
        """Item deselected. Remove item from selected cats..."""
        #         cat = int(self.GetItemText(event.m_itemIndex))
        #         if cat in self.selectedCats:
        #             self.selectedCats.remove(cat)
        #             self.selectedCats.sort()

        event.Skip()

    def GetSelectedItems(self):
        """Return list of selected items (category numbers)"""
        cats = []
        item = self.GetFirstSelected()
        while item != -1:
            cats.append(self.GetItemText(item))
            item = self.GetNextSelected(item)

        return cats

    def GetColumnText(self, index, col):
        """Return column text"""
        item = self.GetItem(index, col)
        return item.GetText()

    def GetListCtrl(self):
        """Returt list"""
        return self

    def OnGetItemText(self, item, col):
        """Get item text"""
        index = self.itemIndexMap[item]
        s = self.itemDataMap[index][col]
        return s

    def OnGetItemAttr(self, item):
        """Get item attributes"""
        index = self.itemIndexMap[item]
        if ( index % 2) == 0:
            return self.attr2
        else:
            return self.attr1

    def OnColumnClick(self, event):
        """Column heading clicked -> sorting"""
        self._col = event.GetColumn()

        # remove duplicated arrow symbol from column header
        # FIXME: should be done automatically
        info = wx.ListItem()
        info.m_mask = wx.LIST_MASK_TEXT | wx.LIST_MASK_IMAGE
        info.m_image = -1
        for column in range(self.GetColumnCount()):
            info.m_text = self.GetColumn(column).GetText()
            self.SetColumn(column, info)

        event.Skip()

    def SortItems(self, sorter=cmp):
        """Sort items"""
        items = list(self.itemDataMap.keys())
        items.sort(self.Sorter)
        self.itemIndexMap = items

        # redraw the list
        self.Refresh()
        
    def Sorter(self, key1, key2):
        colName = self.GetColumn(self._col).GetText()
        ascending = self._colSortFlag[self._col]
        try:
            item1 = self.columns[colName]["ctype"](self.itemDataMap[key1][self._col])
            item2 = self.columns[colName]["ctype"](self.itemDataMap[key2][self._col])
        except ValueError:
            item1 = self.itemDataMap[key1][self._col]
            item2 = self.itemDataMap[key2][self._col]

        if type(item1) == type('') or type(item2) == type(''):
            cmpVal = locale.strcoll(str(item1), str(item2))
        else:
            cmpVal = cmp(item1, item2)


        # If the items are equal then pick something else to make the sort value unique
        if cmpVal == 0:
            cmpVal = apply(cmp, self.GetSecondarySortValues(self._col, key1, key2))

        if ascending:
            return cmpVal
        else:
            return -cmpVal

    def GetSortImages(self):
        """Used by the ColumnSorterMixin, see wx/lib/mixins/listctrl.py"""
        return (self.sm_dn, self.sm_up)

    def IsEmpty(self):
        """Check if list if empty"""
        if self.columns:
            return False
        
        return True
    
class AttributeManager(wx.Frame):
    """
    GRASS Attribute manager main window
    """
    def __init__(self, parent, id=wx.ID_ANY,
                 size = wx.DefaultSize, style = wx.DEFAULT_FRAME_STYLE,
                 title=None, vectorName=None, item=None, log=None):

        self.vectorName = vectorName
        self.parent     = parent # GMFrame
        self.treeItem   = item   # item in layer tree
        if self.parent and self.parent.GetName() == "LayerManager" and \
                self.treeItem and not self.vectorName:
            maptree = self.parent.curr_page.maptree
            name = maptree.GetPyData(self.treeItem)[0]['maplayer'].GetName()
            self.vectorName = name

        self.cmdLog     = log    # self.parent.goutput
        
        wx.Frame.__init__(self, parent, id, style=style)

        # title
        if not title:
            self.SetTitle("%s - <%s>" % (_("GRASS GIS Attribute Table Manager"),
                                         self.vectorName))
        else:
            self.SetTitle(title)
        
        # icon
        self.SetIcon(wx.Icon(os.path.join(globalvar.ETCICONDIR, 'grass_sql.ico'), wx.BITMAP_TYPE_ICO))

        self.panel = wx.Panel(parent=self, id=wx.ID_ANY)

        try:
            self.map        = self.parent.curr_page.maptree.Map
            self.mapdisplay = self.parent.curr_page.maptree.mapdisplay
        except:
            self.map = self.mapdisplay = None
        
        # status bar log class
        self.log = Log(self) # -> statusbar

        # query map layer (if parent (GMFrame) is given)
        self.qlayer = None

        # -> layers / tables description
        self.mapDBInfo = VectorDBInfo(self.vectorName)

        if len(self.mapDBInfo.layers.keys()) == 0:
            wx.MessageBox(parent=self.parent,
                          message=_("Database connection for vector map <%s> "
                                    "is not defined in DB file. "
                                    "You can define new connection in "
                                    "'Manage layers' tab.") % self.vectorName,
                          caption=_("Attribute Table Manager"),
                          style=wx.OK | wx.ICON_INFORMATION | wx.CENTRE)

        #
        # list of command/SQL statements to be performed
        #
        self.listOfCommands      = []
        self.listOfSQLStatements = []

        self.CreateStatusBar(number=1)

        # set up virtual lists (each layer)
        ### {layer: list, widgets...}
        self.layerPage = {}

        # auinotebook (browse, manage, settings)
        #self.notebook = wx.aui.AuiNotebook(parent=self, id=wx.ID_ANY,
        #                                   style=wx.aui.AUI_NB_BOTTOM)
        # really needed (ML)
        # self.notebook.SetFont(wx.Font(10, wx.FONTFAMILY_MODERN, wx.NORMAL, wx.NORMAL, 0, ''))

        self.notebook = FN.FlatNotebook(parent=self.panel, id=wx.ID_ANY,
                                        style=FN.FNB_BOTTOM |
                                        FN.FNB_NO_NAV_BUTTONS |
                                        FN.FNB_FANCY_TABS | FN.FNB_NO_X_BUTTON)

        dbmStyle = globalvar.FNPageStyle

        self.browsePage = FN.FlatNotebook(self.panel, id=wx.ID_ANY,
                                          style=dbmStyle)
        # self.notebook.AddPage(self.browsePage, caption=_("Browse data"))
        self.notebook.AddPage(self.browsePage, text=_("Browse data")) # FN
        self.browsePage.SetTabAreaColour(globalvar.FNPageColor)

        self.manageTablePage = FN.FlatNotebook(self.panel, id=wx.ID_ANY,
                                          style=dbmStyle)
        #self.notebook.AddPage(self.manageTablePage, caption=_("Manage tables"))
        self.notebook.AddPage(self.manageTablePage, text=_("Manage tables")) # FN
        self.manageTablePage.SetTabAreaColour(globalvar.FNPageColor)

        self.manageLayerPage = FN.FlatNotebook(self.panel, id=wx.ID_ANY,
                                               style=dbmStyle)
        #self.notebook.AddPage(self.manageLayerPage, caption=_("Manage layers"))
        self.notebook.AddPage(self.manageLayerPage, text=_("Manage layers")) # FN
        self.manageLayerPage.SetTabAreaColour(globalvar.FNPageColor)

        self.infoCollapseLabelExp = _("Click here to show database connection information")
        self.infoCollapseLabelCol = _("Click here to hide database connection information")

        self.__createBrowsePage()
        self.__createManageTablePage()
        self.__createManageLayerPage()

        self.notebook.SetSelection(0) # select browse tab

        #
        # buttons
        #
        self.btnQuit       = wx.Button(parent=self.panel, id=wx.ID_EXIT)

        # events
        self.btnQuit.Bind(wx.EVT_BUTTON,            self.OnCloseWindow)
        self.notebook.Bind(FN.EVT_FLATNOTEBOOK_PAGE_CHANGED, self.OnPageChanged)
        self.Bind(FN.EVT_FLATNOTEBOOK_PAGE_CHANGED, self.OnLayerPageChanged, self.browsePage)
        self.Bind(FN.EVT_FLATNOTEBOOK_PAGE_CHANGED, self.OnLayerPageChanged, self.manageTablePage)
        
        # do layout
        self.__layout()

        # self.SetMinSize(self.GetBestSize())
        self.SetSize((680, 550)) # FIXME hard-coded size
        self.SetMinSize(self.GetSize())

    def __createBrowsePage(self, onlyLayer=-1):
        """Create browse tab page"""
        for layer in self.mapDBInfo.layers.keys():
            if onlyLayer > 0 and layer != onlyLayer:
                continue

            panel = wx.Panel(parent=self.browsePage, id=wx.ID_ANY)
            win = VirtualAttributeList(panel, self.log,
                                       self.mapDBInfo, layer)
            if win.IsEmpty():
                del panel
                continue
            
            win.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.OnDataItemActivated)

            self.layerPage[layer] = {'browsePage': panel.GetId()}

            self.browsePage.AddPage(page=panel, text=" %d / %s %s" % \
                                        (layer, _("Table"), self.mapDBInfo.layers[layer]['table']))

            pageSizer = wx.BoxSizer(wx.VERTICAL)

            # attribute data
            listBox = wx.StaticBox(parent=panel, id=wx.ID_ANY,
                                   label=" %s " % _("Attribute data - right-click to edit/manage records"))
            listSizer = wx.StaticBoxSizer(listBox, wx.VERTICAL)
            
            sqlBox = wx.StaticBox(parent=panel, id=wx.ID_ANY,
                                  label=" %s " % _("SQL Query"))

            sqlSizer = wx.StaticBoxSizer(sqlBox, wx.VERTICAL)

            win.Bind(wx.EVT_COMMAND_RIGHT_CLICK, self.OnDataRightUp) #wxMSW
            win.Bind(wx.EVT_RIGHT_UP,            self.OnDataRightUp) #wxGTK
            if UserSettings.Get(group='atm', key='leftDbClick', subkey='selection') == 0:
                win.Bind(wx.EVT_LEFT_DCLICK, self.OnDataItemEdit)
                win.Bind(wx.EVT_COMMAND_LEFT_DCLICK, self.OnDataItemEdit)
            else:
                win.Bind(wx.EVT_LEFT_DCLICK, self.OnDataDrawSelected)
                win.Bind(wx.EVT_COMMAND_LEFT_DCLICK, self.OnDataDrawSelected)
                
            
            listSizer.Add(item=win, proportion=1,
                          flag=wx.EXPAND | wx.ALL,
                          border=3)

            # sql statement box
            btnApply = wx.Button(parent=panel, id=wx.ID_APPLY)
            btnApply.SetToolTipString(_("Apply SELECT statement and reload data records"))
            btnApply.Bind(wx.EVT_BUTTON, self.OnApplySqlStatement)
            btnSqlBuilder = wx.Button(parent=panel, id=wx.ID_ANY, label=_("SQL Builder"))
            btnSqlBuilder.Bind(wx.EVT_BUTTON, self.OnBuilder)

            sqlSimple = wx.RadioButton(parent=panel, id=wx.ID_ANY,
                                       label=_("Simple"))
            sqlSimple.SetValue(True)
            sqlAdvanced = wx.RadioButton(parent=panel, id=wx.ID_ANY,
                                         label=_("Advanced"))
            sqlSimple.Bind(wx.EVT_RADIOBUTTON,   self.OnChangeSql)
            sqlAdvanced.Bind(wx.EVT_RADIOBUTTON, self.OnChangeSql)

            sqlWhereColumn = wx.Choice(parent=panel, id=wx.ID_ANY,
                                       size=(100,-1),
                                       choices=self.mapDBInfo.GetColumns(self.mapDBInfo.layers[layer]['table']))
            sqlWhereValue = wx.TextCtrl(parent=panel, id=wx.ID_ANY, value="",
                                        style=wx.TE_PROCESS_ENTER)

            sqlStatement = wx.TextCtrl(parent=panel, id=wx.ID_ANY,
                                       value="SELECT * FROM %s" % \
                                           self.mapDBInfo.layers[layer]['table'],
                                       style=wx.TE_PROCESS_ENTER)
            sqlWhereValue.Bind(wx.EVT_TEXT_ENTER, self.OnApplySqlStatement)
            sqlStatement.Bind(wx.EVT_TEXT_ENTER, self.OnApplySqlStatement)

            sqlLabel = wx.StaticText(parent=panel, id=wx.ID_ANY,
                                     label="SELECT * FROM %s WHERE " % \
                                         self.mapDBInfo.layers[layer]['table'])
            label_query = wx.StaticText(parent=panel, id=wx.ID_ANY,
                                        label="")

            sqlFlexSizer = wx.FlexGridSizer (cols=3, hgap=5, vgap=5)
            sqlFlexSizer.AddGrowableCol(1)

            sqlFlexSizer.Add(item=sqlSimple,
                             flag=wx.ALIGN_CENTER_VERTICAL)
            sqlSimpleSizer = wx.BoxSizer(wx.HORIZONTAL)
            sqlSimpleSizer.Add(item=sqlLabel,
                               flag=wx.ALIGN_CENTER_VERTICAL)
            sqlSimpleSizer.Add(item=sqlWhereColumn,
                               flag=wx.EXPAND | wx.ALIGN_CENTER_VERTICAL)
            sqlSimpleSizer.Add(item=sqlWhereValue, proportion=1,
                               flag=wx.EXPAND | wx.ALIGN_CENTER_VERTICAL)
            sqlFlexSizer.Add(item=sqlSimpleSizer,
                             flag=wx.ALIGN_CENTER_VERTICAL | wx.EXPAND)
            sqlFlexSizer.Add(item=btnApply,
                             flag=wx.ALIGN_RIGHT)
            sqlFlexSizer.Add(item=sqlAdvanced,
                             flag=wx.ALIGN_CENTER_VERTICAL)
            sqlFlexSizer.Add(item=sqlStatement,
                             flag=wx.EXPAND)
            sqlFlexSizer.Add(item=btnSqlBuilder,
                             flag=wx.ALIGN_RIGHT)

            sqlSizer.Add(item=sqlFlexSizer,
                         flag=wx.ALL | wx.EXPAND,
                         border=3)

            pageSizer.Add(item=listSizer,
                          proportion=1,
                          flag=wx.ALL | wx.EXPAND,
                          border=5)

            pageSizer.Add(item=sqlSizer,
                          proportion=0,
                          flag=wx.BOTTOM | wx.LEFT | wx.RIGHT | wx.EXPAND,
                          border=5)

            panel.SetSizer(pageSizer)

            self.layerPage[layer]['data']      = win.GetId()
            self.layerPage[layer]['simple']    = sqlSimple.GetId()
            self.layerPage[layer]['advanced']  = sqlAdvanced.GetId()
            self.layerPage[layer]['whereColumn'] = sqlWhereColumn.GetId()
            self.layerPage[layer]['where']     = sqlWhereValue.GetId()
            self.layerPage[layer]['builder']   = btnSqlBuilder.GetId()
            self.layerPage[layer]['statement'] = sqlStatement.GetId()


        self.browsePage.SetSelection(0) # select first layer
        try:
            self.layer = self.mapDBInfo.layers.keys()[0]
            self.OnChangeSql(None)
            self.log.write(_("Number of loaded records: %d") % \
                           self.FindWindowById(self.layerPage[self.layer]['data']).GetItemCount())
        except (IndexError, KeyError):
            self.layer = None
        
    def __createManageTablePage(self, onlyLayer=-1):
        """Create manage page (create/link and alter tables)"""
        for layer in self.mapDBInfo.layers.keys():
            if onlyLayer > 0 and layer != onlyLayer:
                continue
            
            if not self.layerPage.has_key(layer):
                continue
            
            panel = wx.Panel(parent=self.manageTablePage, id=wx.ID_ANY)
            self.layerPage[layer]['tablePage'] = panel.GetId()
            self.manageTablePage.AddPage(page=panel,
                                         text=" %d / %s %s" % (layer,
                                                               _("Table"),
                                                               self.mapDBInfo.layers[layer]['table']))
            
            pageSizer = wx.BoxSizer(wx.VERTICAL)
            
            #
            # dbInfo
            #
            infoCollapse = wx.CollapsiblePane(parent=panel,
                                              label=self.infoCollapseLabelExp,
                                              style=wx.CP_DEFAULT_STYLE |
                                              wx.CP_NO_TLW_RESIZE | wx.EXPAND)
            self.MakeInfoPaneContent(layer, infoCollapse.GetPane())
            infoCollapse.Collapse(False)
            self.Bind(wx.EVT_COLLAPSIBLEPANE_CHANGED, self.OnInfoPaneChanged, infoCollapse)
            
            #
            # table description
            #
            table = self.mapDBInfo.layers[layer]['table']
            tableBox = wx.StaticBox(parent=panel, id=wx.ID_ANY,
                                    label=" %s " % _("Table <%s> - right-click to delete column(s)") % table)
            
            tableSizer = wx.StaticBoxSizer(tableBox, wx.VERTICAL)
            
            list = self.__createTableDesc(panel, table)
            list.Bind(wx.EVT_COMMAND_RIGHT_CLICK, self.OnTableRightUp) #wxMSW
            list.Bind(wx.EVT_RIGHT_UP,            self.OnTableRightUp) #wxGTK
            self.layerPage[layer]['tableData'] = list.GetId()
            
            #
            # add column
            #
            columnBox = wx.StaticBox(parent=panel, id=wx.ID_ANY,
                                     label=" %s " % _("Manage columns"))
            
            columnSizer = wx.StaticBoxSizer(columnBox, wx.VERTICAL)
            
            addSizer = wx.FlexGridSizer (cols=5, hgap=3, vgap=3)
            addSizer.AddGrowableCol(3)
            
            label  = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Column name"))
            column = wx.TextCtrl(parent=panel, id=wx.ID_ANY, value='',
                                 size=(150, -1), style=wx.TE_PROCESS_ENTER)
            column.Bind(wx.EVT_TEXT,       self.OnTableAddColumnName)
            column.Bind(wx.EVT_TEXT_ENTER, self.OnTableItemAdd)
            self.layerPage[layer]['addColName'] = column.GetId()
            addSizer.Add(item=label,
                         flag=wx.ALIGN_CENTER_VERTICAL)
            addSizer.Add(item=column,
                         flag=wx.ALIGN_CENTER_VERTICAL)
            # data type
            label  = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Data type"))
            addSizer.Add(item=label,
                         flag=wx.ALIGN_CENTER_VERTICAL)
            
            subSizer = wx.BoxSizer(wx.HORIZONTAL)
            type = wx.Choice (parent=panel, id=wx.ID_ANY,
                              choices = ["integer",
                                         "double",
                                         "varchar",
                                         "date"]) # FIXME
            type.SetSelection(0)
            type.Bind(wx.EVT_CHOICE, self.OnTableChangeType)
            self.layerPage[layer]['addColType'] = type.GetId()
            subSizer.Add(item=type,
                         flag=wx.ALIGN_CENTER_VERTICAL | wx.LEFT | wx.RIGHT,
                         border=3)
            # length
            label  = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Data length"))
            length = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(65, -1),
                                 initial=250,
                                 min=1, max=1e6)
            length.Enable(False)
            self.layerPage[layer]['addColLength'] = length.GetId()
            subSizer.Add(item=label,
                         flag=wx.ALIGN_CENTER_VERTICAL | wx.LEFT | wx.RIGHT,
                         border=3)
            subSizer.Add(item=length,
                         flag=wx.ALIGN_CENTER_VERTICAL | wx.LEFT | wx.RIGHT,
                         border=3)
            
            addSizer.Add(item=subSizer,
                         flag=wx.ALIGN_CENTER_VERTICAL | wx.LEFT | wx.RIGHT,
                         border=3)
            
            btnAddCol = wx.Button(parent=panel, id=wx.ID_ANY, label=_("Add"))
            btnAddCol.Bind(wx.EVT_BUTTON, self.OnTableItemAdd)
            btnAddCol.Enable(False)
            self.layerPage[layer]['addColButton'] = btnAddCol.GetId()
            addSizer.Add(item=btnAddCol,
                         proportion=0,
                         flag=wx.EXPAND | wx.ALIGN_RIGHT | wx.FIXED_MINSIZE |
                         wx.ALIGN_CENTER_VERTICAL )
            
            # rename col
            label  = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Rename column"))
            column = wx.ComboBox(parent=panel, id=wx.ID_ANY, size=(150, -1),
                                 style=wx.CB_SIMPLE | wx.CB_READONLY,
                                 choices=self.mapDBInfo.GetColumns(table))
            column.SetSelection(0)
            self.layerPage[layer]['renameCol'] = column.GetId()
            addSizer.Add(item=label,
                         flag=wx.ALIGN_CENTER_VERTICAL)
            addSizer.Add(item=column,
                         flag=wx.ALIGN_CENTER_VERTICAL)
            label  = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("To"))
            columnTo = wx.TextCtrl(parent=panel, id=wx.ID_ANY, value='',
                                   size=(150, -1), style=wx.TE_PROCESS_ENTER)
            columnTo.Bind(wx.EVT_TEXT,       self.OnTableRenameColumnName)
            columnTo.Bind(wx.EVT_TEXT_ENTER, self.OnTableItemChange)
            self.layerPage[layer]['renameColTo'] = columnTo.GetId()
            addSizer.Add(item=label,
                         flag=wx.ALIGN_CENTER_VERTICAL | wx.ALIGN_CENTER)
            addSizer.Add(item=columnTo,
                         flag=wx.ALIGN_CENTER_VERTICAL)
            btnRenameCol = wx.Button(parent=panel, id=wx.ID_ANY, label=_("&Rename"))
            btnRenameCol.Bind(wx.EVT_BUTTON, self.OnTableItemChange)
            btnRenameCol.Enable(False)
            self.layerPage[layer]['renameColButton'] = btnRenameCol.GetId()
            
            addSizer.Add(item=btnRenameCol,
                         proportion=0,
                         flag=wx.EXPAND | wx.ALIGN_RIGHT | wx.FIXED_MINSIZE |
                         wx.ALIGN_CENTER_VERTICAL)

            columnSizer.Add(item=addSizer, proportion=1,
                            flag=wx.ALL | wx.EXPAND, border=3)
            
            tableSizer.Add(item=list,
                           flag=wx.ALL | wx.EXPAND,
                           proportion=1,
                           border=3)
            
            pageSizer.Add(item=infoCollapse,
                          flag=wx.ALL | wx.EXPAND,
                          proportion=0,
                          border=3)
            
            pageSizer.Add(item=tableSizer,
                          flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND,
                          proportion=1,
                          border=5)
 
            pageSizer.Add(item=columnSizer,
                          flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND,
                          proportion=0,
                          border=5)
            
            panel.SetSizer(pageSizer)
            
            self.layerPage[layer]['dbinfo'] = infoCollapse.GetId()
        
        self.manageTablePage.SetSelection(0) # select first layer
        try:
            self.layer = self.mapDBInfo.layers.keys()[0]
        except IndexError:
            self.layer = None
        
    def __createTableDesc(self, parent, table):
        """Create list with table description"""
        list = TableListCtrl(parent=parent, id=wx.ID_ANY,
                             table=self.mapDBInfo.tables[table],
                             columns=self.mapDBInfo.GetColumns(table))
        list.Populate()
        # sorter
        # itemDataMap = list.Populate()
        # listmix.ColumnSorterMixin.__init__(self, 2)

        return list

    def __createManageLayerPage(self):
        """Create manage page"""
        splitterWin = wx.SplitterWindow(parent=self.manageLayerPage, id=wx.ID_ANY)
        self.manageLayerPage.AddPage(page=splitterWin,
                                     text=_("Layers of vector map")) # dummy page
        
        #
        # list of layers
        #
        panelList = wx.Panel(parent=splitterWin, id=wx.ID_ANY)

        panelListSizer  = wx.BoxSizer(wx.VERTICAL)
        layerBox = wx.StaticBox(parent=panelList, id=wx.ID_ANY,
                                label=" %s " % _("List of layers"))
        layerSizer = wx.StaticBoxSizer(layerBox, wx.VERTICAL)

        self.layerList = self.__createLayerDesc(panelList)
        self.layerList.Bind(wx.EVT_COMMAND_RIGHT_CLICK, self.OnLayerRightUp) #wxMSW
        self.layerList.Bind(wx.EVT_RIGHT_UP,            self.OnLayerRightUp) #wxGTK

        layerSizer.Add(item=self.layerList,
                       flag=wx.ALL | wx.EXPAND,
                       proportion=1,
                       border=3)

        panelListSizer.Add(item=layerSizer,
                           flag=wx.ALL | wx.EXPAND,
                           proportion=1,
                           border=3)

        panelList.SetSizer(panelListSizer)

        #
        # manage part
        #
        panelManage = wx.Panel(parent=splitterWin, id=wx.ID_ANY)

        manageSizer = wx.BoxSizer(wx.VERTICAL)

        self.manageLayerBook = LayerBook(parent=panelManage, id=wx.ID_ANY,
                                         parentDialog=self)

        manageSizer.Add(item=self.manageLayerBook,
                        proportion=1,
                        flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND,
                        border=5)

        panelManage.SetSizer(manageSizer)

        splitterWin.SplitHorizontally(panelList, panelManage, 100) 
        splitterWin.Fit()

    def __createLayerDesc(self, parent):
        """Create list of linked layers"""
        list = LayerListCtrl(parent=parent, id=wx.ID_ANY,
                             layers=self.mapDBInfo.layers)
        list.Populate()
        # sorter
        # itemDataMap = list.Populate()
        # listmix.ColumnSorterMixin.__init__(self, 2)

        return list

    def __layout(self):
        """Do layout"""
        # frame body
        mainSizer = wx.BoxSizer(wx.VERTICAL)

        # buttons
        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.Add(item=self.btnQuit, proportion=1,
                     flag=wx.ALL | wx.ALIGN_RIGHT | wx.SHAPED, border=5)
        # btnSizer.Add(item=self.btnApply,
        #             flag=wx.ALL, border=5)

        mainSizer.Add(item=self.notebook, proportion=1, flag=wx.EXPAND)
        mainSizer.Add(item=btnSizer, proportion=0, flag=wx.EXPAND | wx.ALL, border=5)

        self.panel.SetAutoLayout(True)
        self.panel.SetSizer(mainSizer)
        mainSizer.Fit(self.panel)
        self.Layout()
        
    def OnDataRightUp(self, event):
        """Table description area, context menu"""
        if not hasattr(self, "popupDataID1"):
            self.popupDataID1 = wx.NewId()
            self.popupDataID2 = wx.NewId()
            self.popupDataID3 = wx.NewId()
            self.popupDataID4 = wx.NewId()
            self.popupDataID5 = wx.NewId()
            self.popupDataID6 = wx.NewId()
            self.popupDataID7 = wx.NewId()
            self.popupDataID8 = wx.NewId()
            self.popupDataID9 = wx.NewId()
            self.popupDataID10 = wx.NewId()
            self.popupDataID11 = wx.NewId()

            self.Bind(wx.EVT_MENU, self.OnDataItemEdit,       id=self.popupDataID1)
            self.Bind(wx.EVT_MENU, self.OnDataItemAdd,        id=self.popupDataID2)
            self.Bind(wx.EVT_MENU, self.OnDataItemDelete,     id=self.popupDataID3)
            self.Bind(wx.EVT_MENU, self.OnDataItemDeleteAll,  id=self.popupDataID4)
            self.Bind(wx.EVT_MENU, self.OnDataSelectAll,      id=self.popupDataID5)
            self.Bind(wx.EVT_MENU, self.OnDataSelectNone,     id=self.popupDataID6)
            self.Bind(wx.EVT_MENU, self.OnDataDrawSelected,   id=self.popupDataID7)
            self.Bind(wx.EVT_MENU, self.OnDataDrawSelectedZoom, id=self.popupDataID8)
            self.Bind(wx.EVT_MENU, self.OnExtractSelected,    id=self.popupDataID9)
            self.Bind(wx.EVT_MENU, self.OnDeleteSelected,     id=self.popupDataID11)
            self.Bind(wx.EVT_MENU, self.OnDataReload,         id=self.popupDataID10)

        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        # generate popup-menu
        menu = wx.Menu()
        menu.Append(self.popupDataID1, _("Edit selected record"))
        selected = list.GetFirstSelected()
        if selected == -1 or list.GetNextSelected(selected) != -1:
            menu.Enable(self.popupDataID1, False)
        menu.Append(self.popupDataID2, _("Insert new record"))
        menu.Append(self.popupDataID3, _("Delete selected record(s)"))
        menu.Append(self.popupDataID4, _("Delete all records"))
        menu.AppendSeparator()
        menu.Append(self.popupDataID5, _("Select all"))
        menu.Append(self.popupDataID6, _("Deselect all"))
        menu.AppendSeparator()
        menu.Append(self.popupDataID7, _("Highlight selected features"))
        menu.Append(self.popupDataID8, _("Highlight selected features and zoom"))
        if not self.map or len(list.GetSelectedItems()) == 0:
            menu.Enable(self.popupDataID7, False)
            menu.Enable(self.popupDataID8, False)
        menu.Append(self.popupDataID9, _("Extract selected features"))
        menu.Append(self.popupDataID11, _("Delete selected features"))
        if list.GetFirstSelected() == -1:
            menu.Enable(self.popupDataID3, False)
            menu.Enable(self.popupDataID9, False)
            menu.Enable(self.popupDataID11, False)
        menu.AppendSeparator()
        menu.Append(self.popupDataID10, _("Reload"))

        self.PopupMenu(menu)
        menu.Destroy()

        # update statusbar
        self.log.write(_("Number of loaded records: %d") % \
                           list.GetItemCount())

    def OnDataItemDelete(self, event):
        """Delete selected item(s) from the list (layer/category pair)"""
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        item = list.GetFirstSelected()

        table    = self.mapDBInfo.layers[self.layer]["table"]
        key      = self.mapDBInfo.layers[self.layer]["key"]

        indeces = []
        # collect SQL statements
        while item != -1:
            index = list.itemIndexMap[item]
            indeces.append(index)

            cat = list.itemCatsMap[index]
            
            self.listOfSQLStatements.append('DELETE FROM %s WHERE %s=%d' % \
                                                (table, key, cat))

            item = list.GetNextSelected(item)

        if UserSettings.Get(group='atm', key='askOnDeleteRec', subkey='enabled'):
            deleteDialog = wx.MessageBox(parent=self,
                                         message=_("Selected data records (%d) will permanently deleted "
                                                   "from table. Do you want to delete them?") % \
                                             (len(self.listOfSQLStatements)),
                                         caption=_("Delete records"),
                                         style=wx.YES_NO | wx.CENTRE)
            if deleteDialog != wx.YES:
                self.listOfSQLStatements = []
                return False

        # restore maps
        i = 0
        indexTemp = copy.copy(list.itemIndexMap)
        list.itemIndexMap = []
        dataTemp = copy.deepcopy(list.itemDataMap)
        list.itemDataMap = {}
        catsTemp = copy.deepcopy(list.itemCatsMap)
        list.itemCatsMap = {}

        i = 0
        for index in indexTemp:
            if index in indeces:
                continue
            list.itemIndexMap.append(i)
            list.itemDataMap[i] = dataTemp[index]
            list.itemCatsMap[i] = catsTemp[index]

            i += 1
            
        list.SetItemCount(len(list.itemIndexMap))

        # deselect items
        item = list.GetFirstSelected()
        while item != -1:
            list.SetItemState(item, 0, wx.LIST_STATE_SELECTED | wx.LIST_STATE_FOCUSED)
            item = list.GetNextSelected(item)
        
        # submit SQL statements
        self.ApplyCommands()
        
        return True

    def OnDataItemDeleteAll(self, event):
        """Delete all items from the list"""
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        if UserSettings.Get(group='atm', key='askOnDeleteRec', subkey='enabled'):
            deleteDialog = wx.MessageBox(parent=self,
                                         message=_("All data records (%d) will permanently deleted "
                                                   "from table. Do you want to delete them?") % \
                                             (len(list.itemIndexMap)),
                                         caption=_("Delete records"),
                                         style=wx.YES_NO | wx.CENTRE)
            if deleteDialog != wx.YES:
                return

        list.DeleteAllItems()
        list.itemDataMap  = {}
        list.itemIndexMap = []
        list.SetItemCount(0)

        table = self.mapDBInfo.layers[self.layer]["table"]
        self.listOfSQLStatements.append('DELETE FROM %s' % table)

        self.ApplyCommands()
        
        event.Skip()

    def _drawSelected(self, zoom):
        """Highlight selected features"""
        if not self.map or not self.mapdisplay:
            return
        
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        cats = map(int, list.GetSelectedItems())

        digitToolbar = self.mapdisplay.toolbars['vdigit']
        if digitToolbar and digitToolbar.GetLayer() and \
                digitToolbar.GetLayer().GetName() == self.vectorName:

            self.mapdisplay.digit.driver.SetSelected(cats, field=self.layer)
            if zoom:
                n, s, w, e = self.mapdisplay.digit.driver.GetRegionSelected()
                self.mapdisplay.Map.GetRegion(n=n, s=s, w=w, e=e,
                                              update=True)
        else:
            # add map layer with higlighted vector features
            self.AddQueryMapLayer() # -> self.qlayer

            # set opacity based on queried layer
            if self.parent and self.parent.GetName() == "LayerManager" and \
                    self.treeItem:
                maptree = self.parent.curr_page.maptree
                opacity = maptree.GetPyData(self.treeItem)[0]['maplayer'].GetOpacity(float=True)
                self.qlayer.SetOpacity(opacity)
            if zoom:
                keyColumn = self.mapDBInfo.layers[self.layer]['key']
                where = ''
                for range in utils.ListOfCatsToRange(cats).split(','):
                    if '-' in range:
                        min, max = range.split('-')
                        where += '%s >= %d and %s <= %d or ' % \
                            (keyColumn, int(min),
                             keyColumn, int(max))
                    else:
                        where += '%s = %d or ' % (keyColumn, int(range))
                where = where.rstrip('or ')
                
                select = gcmd.RunCommand('v.db.select',
                                         parent = self,
                                         read = True,
                                         quiet = True,
                                         flags = 'r',
                                         map = self.mapDBInfo.map,
                                         layer = int(self.layer),
                                         where = where)
                
                region = {}
                for line in select.splitlines():
                    key, value = line.split('=')
                    region[key.strip()] = float(value.strip())
                
                self.mapdisplay.Map.GetRegion(n=region['n'], s=region['s'],
                                              w=region['w'], e=region['e'],
                                              update=True)
        
        if zoom:
            self.mapdisplay.Map.AdjustRegion() # adjust resolution
            self.mapdisplay.Map.AlignExtentFromDisplay() # adjust extent
            self.mapdisplay.MapWindow.UpdateMap(render=True, renderVector=True)
        else:
            self.mapdisplay.MapWindow.UpdateMap(render=False, renderVector=True)
        
    def OnDataDrawSelected(self, event):
        """Reload table description"""
        self._drawSelected(zoom=False)
        event.Skip()

    def OnDataDrawSelectedZoom(self, event):
        self._drawSelected(zoom=True)
        event.Skip()
        
    def OnDataItemAdd(self, event):
        """Add new record to the attribute table"""
        list      = self.FindWindowById(self.layerPage[self.layer]['data'])
        table     = self.mapDBInfo.layers[self.layer]['table']
        keyColumn = self.mapDBInfo.layers[self.layer]['key']
        
        # (column name, value)
        data = []

        # collect names of all visible columns
        columnName = []
        for i in range(list.GetColumnCount()): 
            columnName.append(list.GetColumn(i).GetText())

        # maximal category number
        if len(list.itemCatsMap.values()) > 0:
            maxCat = max(list.itemCatsMap.values())
        else:
            maxCat = 0 # starting category '1'
        
        # key column must be always presented
        if keyColumn not in columnName:
            columnName.insert(0, keyColumn) # insert key column on first position
            data.append((keyColumn, str(maxCat + 1)))
            missingKey = True
        else:
            missingKey = False
            
        # add other visible columns
        colIdx = 0
        keyId = -1
        for col in columnName:
            if col == keyColumn: # key 
                if missingKey is False: 
                    data.append((col, str(maxCat + 1)))
                    keyId = colIdx
            else:
                data.append((col, ''))
            colIdx += 1
                
        dlg = ModifyTableRecord(parent=self, id=wx.ID_ANY,
                                title=_("Insert new record"),
                                data=data, keyEditable=(keyId, True))

        if dlg.ShowModal() == wx.ID_OK:
            try: # get category number
                cat = int(dlg.GetValues(columns=[keyColumn])[0])
            except:
                cat = -1

            try:
                if cat in list.itemCatsMap.values():
                    raise ValueError(_("Record with category number %d "
                                       "already exists in the table.") % cat)

                values = dlg.GetValues() # values (need to be casted)
                columnsString = ''
                valuesString   = ''
                
                for i in range(len(values)):
                    if len(values[i]) == 0: # NULL
                        if columnName[i] == keyColumn:
                            raise ValueError(_("Category number (column %s)"
                                               " is missing.") % keyColumn)
                        else:
                            continue

                    try:
                        values[i] = list.columns[columnName[i]]['ctype'] (values[i])
                    except:
                        raise ValueError(_("Casting value '%(value)s' to %(type)s failed.") % 
                                         {'value' : str(values[i]),
                                          'type' : list.columns[columnName[i]]['type']})
                    columnsString += '%s,' % columnName[i]
                    if list.columns[columnName[i]]['ctype'] == str:
                        valuesString += "'%s'," % values[i]
                    else:
                        valuesString += "%s," % values[i]

            except ValueError, err:
                wx.MessageBox(parent=self,
                              message="%s%s%s" % (_("Unable to insert new record."),
                                                    os.linesep, err),
                              caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                return

            # remove category if need 
            if missingKey is True:
                del values[0]
                
            # add new item to the list
            if len(list.itemIndexMap) > 0:
                index = max(list.itemIndexMap) + 1
            else:
                index = 0
            
            list.itemIndexMap.append(index)
            list.itemDataMap[index] = values
            list.itemCatsMap[index] = cat
            list.SetItemCount(list.GetItemCount() + 1)

            self.listOfSQLStatements.append('INSERT INTO %s (%s) VALUES(%s)' % \
                                                (table,
                                                 columnsString.strip(','),
                                                 valuesString.strip(',')))
            self.ApplyCommands()
            
    def OnDataItemEdit(self, event):
        """Edit selected record of the attribute table"""
        list      = self.FindWindowById(self.layerPage[self.layer]['data'])
        item      = list.GetFirstSelected()
        if item == -1:
            return

        table     = self.mapDBInfo.layers[self.layer]['table']
        keyColumn = self.mapDBInfo.layers[self.layer]['key']
        cat       = list.itemCatsMap[list.itemIndexMap[item]]

        # (column name, value)
        data = []

        # collect names of all visible columns
        columnName = []
        for i in range(list.GetColumnCount()): 
            columnName.append(list.GetColumn(i).GetText())


        # key column must be always presented
        if keyColumn not in columnName:
            columnName.insert(0, keyColumn) # insert key column on first position
            data.append((keyColumn, str(cat)))
            keyId = 0
            missingKey = True
        else:
            missingKey = False
            
        # add other visible columns
        for i in range(len(columnName)):
            if columnName[i] == keyColumn: # key 
                if missingKey is False: 
                    data.append((columnName[i], str(cat)))
                    keyId = i
            else:
                if missingKey is True:
                    value = list.GetItem(item, i-1).GetText()
                else:
                    value = list.GetItem(item, i).GetText()
                data.append((columnName[i], value))

        dlg = ModifyTableRecord(parent=self, id=wx.ID_ANY,
                                title=_("Update existing record"),
                                data=data, keyEditable=(keyId, False))

        if dlg.ShowModal() == wx.ID_OK:
            values = dlg.GetValues() # string
            updateString = ''
            try:
                for i in range(len(values)): 
                    if i == keyId: # skip key column
                        continue
                    if list.GetItem(item, i).GetText() != values[i]:
                        if len(values[i]) > 0:
                            try:
                                if missingKey is True:
                                    idx = i - 1
                                else:
                                    idx = i
                                if list.columns[columnName[i]]['ctype'] != type(''):
                                    list.itemDataMap[item][idx] = \
                                        list.columns[columnName[i]]['ctype'] (values[i])
                                else:
                                    list.itemDataMap[item][idx] = values[i]
                            except:
                                raise ValueError(_("Casting value '%(value)s' to %(type)s failed.") % \
                                                     {'value' : str(values[i]),
                                                      'type' : list.columns[columnName[i]]['type']})

                            if list.columns[columnName[i]]['ctype'] == str:
                                updateString += "%s='%s'," % (columnName[i], values[i])
                            else:
                                updateString += "%s=%s," % (columnName[i], values[i])
                        else: # NULL
                            updateString += "%s=NULL," % (columnName[i])
            except ValueError, err:
                wx.MessageBox(parent=self,
                              message="%s%s%s" % (_("Unable to update existing record."),
                                                  os.linesep, err),
                              caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                return
            
            if len(updateString) > 0:
                self.listOfSQLStatements.append('UPDATE %s SET %s WHERE %s=%d' % \
                                                    (table, updateString.strip(','),
                                                     keyColumn, cat))
                self.ApplyCommands()
                
    def OnDataReload(self, event):
        """Reload list of records"""
        self.OnApplySqlStatement(None)
        self.listOfSQLStatements = []

    def OnDataSelectAll(self, event):
        """Select all items"""
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        item = -1

        while True:
            item = list.GetNextItem(item)
            if item == -1:
                break
            list.SetItemState(item, wx.LIST_STATE_SELECTED, wx.LIST_STATE_SELECTED)

        event.Skip()

    def OnDataSelectNone(self, event):
        """Deselect items"""
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        item = -1

        while True:
            item = list.GetNextItem(item, wx.LIST_STATE_SELECTED)
            if item == -1:
                break
            list.SetItemState(item, 0, wx.LIST_STATE_SELECTED | wx.LIST_STATE_FOCUSED)

        event.Skip()


    def OnTableChangeType(self, event):
        """Data type for new column changed. Enable or disable
        data length widget"""
        win = self.FindWindowById(self.layerPage[self.layer]['addColLength'])
        if event.GetString() == "varchar":
            win.Enable(True)
        else:
            win.Enable(False)

    def OnTableRenameColumnName(self, event):
        """Editing column name to be added to the table"""
        btn  = self.FindWindowById(self.layerPage[self.layer]['renameColButton'])
        col  = self.FindWindowById(self.layerPage[self.layer]['renameCol'])
        colTo = self.FindWindowById(self.layerPage[self.layer]['renameColTo'])
        if len(col.GetValue()) > 0 and len(colTo.GetValue()) > 0:
            btn.Enable(True)
        else:
            btn.Enable(False)

        event.Skip()

    def OnTableAddColumnName(self, event):
        """Editing column name to be added to the table"""
        btn = self.FindWindowById(self.layerPage[self.layer]['addColButton'])
        if len(event.GetString()) > 0:
            btn.Enable(True)
        else:
            btn.Enable(False)

        event.Skip()

    def OnTableItemChange(self, event):
        """Rename column in the table"""
        list   = self.FindWindowById(self.layerPage[self.layer]['tableData'])
        name   = self.FindWindowById(self.layerPage[self.layer]['renameCol']).GetValue()
        nameTo = self.FindWindowById(self.layerPage[self.layer]['renameColTo']).GetValue()

        table = self.mapDBInfo.layers[self.layer]["table"]

        if not name or not nameTo:
            wx.MessageBox(self=self,
                          message=_("Unable to rename column. "
                                    "No column name defined."),
                          caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
            return
        else:
            item = list.FindItem(start=-1, str=name)
            if item > -1:
                if list.FindItem(start=-1, str=nameTo) > -1:
                    wx.MessageBox(parent=self,
                                  message=_("Unable to rename column <%(column)s> to "
                                            "<%(columnTo)s>. Column already exists "
                                            "in the table <%(table)s>.") % \
                                      {'column' : name, 'columnTo' : nameTo,
                                       'table' : table},
                                  caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                    return
                else:
                    list.SetItemText(item, nameTo)

                    self.listOfCommands.append(['v.db.renamecol',
                                                'map=%s' % self.vectorName,
                                                'layer=%d' % self.layer,
                                                'column=%s,%s' % (name, nameTo)])
            else:
                wx.MessageBox(parent=self,
                              message=_("Unable to rename column. "
                                        "Column <%(column)s> doesn't exist in the table <%(table)s>.") % 
                              {'column' : name, 'table' : table},
                              caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                return
            
        # apply changes
        self.ApplyCommands()

        # update widgets
        self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetItems(self.mapDBInfo.GetColumns(table))
        self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetSelection(0)
        self.FindWindowById(self.layerPage[self.layer]['renameColTo']).SetValue('')

        event.Skip()

    def OnTableRightUp(self, event):
        """Table description area, context menu"""
        if not hasattr(self, "popupTableID"):
            self.popupTableID1 = wx.NewId()
            self.popupTableID2 = wx.NewId()
            self.popupTableID3 = wx.NewId()
            self.Bind(wx.EVT_MENU, self.OnTableItemDelete,    id=self.popupTableID1)
            self.Bind(wx.EVT_MENU, self.OnTableItemDeleteAll, id=self.popupTableID2)
            self.Bind(wx.EVT_MENU, self.OnTableReload,        id=self.popupTableID3)

        # generate popup-menu
        menu = wx.Menu()
        menu.Append(self.popupTableID1, _("Drop selected column"))
        if self.FindWindowById(self.layerPage[self.layer]['tableData']).GetFirstSelected() == -1:
            menu.Enable(self.popupTableID1, False)
        menu.Append(self.popupTableID2, _("Drop all columns"))
        menu.AppendSeparator()
        menu.Append(self.popupTableID3, _("Reload"))

        self.PopupMenu(menu)
        menu.Destroy()

    def OnTableItemDelete(self, event):
        """Delete selected item(s) from the list"""
        list = self.FindWindowById(self.layerPage[self.layer]['tableData'])

        item = list.GetFirstSelected()
        while item != -1:
            self.listOfCommands.append(['v.db.dropcol',
                                        'map=%s' % self.vectorName,
                                        'layer=%d' % self.layer,
                                        'column=%s' % list.GetItemText(item)])
            list.DeleteItem(item)
            item = list.GetFirstSelected()

        # apply changes
        self.ApplyCommands()

        # update widgets
        table = self.mapDBInfo.layers[self.layer]['table']
        self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetItems(self.mapDBInfo.GetColumns(table))
        self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetSelection(0)

        event.Skip()

    def OnTableItemDeleteAll(self, event):
        """Delete all items from the list"""
        table = self.mapDBInfo.layers[self.layer]['table']
        cols = self.mapDBInfo.GetColumns(table)
        for col in cols:
            self.listOfCommands = [['v.db.dropcol',
                                    'map=%s' % self.vectorName,
                                    'layer=%d' % self.layer,
                                    'column=%s' % col]]
        self.FindWindowById(self.layerPage[self.layer]['tableData']).DeleteAllItems()

        # apply changes
        self.ApplyCommands()

        # update widgets
        table = self.mapDBInfo.layers[self.layer]['table']
        self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetItems(self.mapDBInfo.GetColumns(table))
        self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetSelection(0)

        event.Skip()

    def OnTableReload(self, event=None):
        """Reload table description"""
        self.FindWindowById(self.layerPage[self.layer]['tableData']).Populate(update=True)
        self.listOfCommands = []

    def OnTableItemAdd(self, event):
        """Add new column to the table"""
	table = self.mapDBInfo.layers[self.layer]['table']
        name = self.FindWindowById(self.layerPage[self.layer]['addColName']).GetValue()

        if not name:
            wx.MessageBox(parent=self,
                          message=_("Unable to add column to the table. "
                                    "No column name defined."),
                          caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
            return

        type = self.FindWindowById(self.layerPage[self.layer]['addColType']). \
            GetStringSelection()
        
        # cast type if needed
        if type == 'double':
            type = 'double precision'
        if type == 'varchar':
            length = int(self.FindWindowById(self.layerPage[self.layer]['addColLength']). \
                             GetValue())
        else:
            length = '' # FIXME

        # add item to the list of table columns
        list = self.FindWindowById(self.layerPage[self.layer]['tableData'])
        # check for duplicate items
        if list.FindItem(start=-1, str=name) > -1:
            wx.MessageBox(parent=self,
                          message=_("Column <%(column)s> already exists in table <%(table)s>.") % \
                              {'column' : name, 'table' : self.mapDBInfo.layers[self.layer]["table"]},
                          caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
            return
        index = list.InsertStringItem(sys.maxint, str(name))
        list.SetStringItem(index, 0, str(name))
        list.SetStringItem(index, 1, str(type))
        list.SetStringItem(index, 2, str(length))
        
        # add v.db.addcol command to the list
        if type == 'varchar':
            type += ' (%d)' % length
        self.listOfCommands.append(['v.db.addcol',
                                    'map=%s' % self.vectorName,
                                    'layer=%d' % self.layer,
                                    'columns=%s %s' % (name, type)])

        # apply changes
        self.ApplyCommands()
        
        # update widgets
        self.FindWindowById(self.layerPage[self.layer]['addColName']).SetValue('')
	self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetItems(self.mapDBInfo.GetColumns(table))
        self.FindWindowById(self.layerPage[self.layer]['renameCol']).SetSelection(0)
        
        event.Skip()
        
    def OnLayerPageChanged(self, event):
        """Layer tab changed"""
        pageNum = event.GetSelection()
        self.layer = self.mapDBInfo.layers.keys()[pageNum]
        
        try:
            idCol = self.layerPage[self.layer]['whereColumn']
        except KeyError:
            idCol = None
        
        try:
            self.OnChangeSql(None)
            # update statusbar
            self.log.write(_("Number of loaded records: %d") % \
                               self.FindWindowById(self.layerPage[self.layer]['data']).\
                               GetItemCount())
        except:
            pass
        
        if idCol:
            winCol = self.FindWindowById(idCol)
            table = self.mapDBInfo.layers[self.layer]["table"]
            self.mapDBInfo.GetColumns(table)
        
        event.Skip()
        
    def OnPageChanged(self, event):
        try:
            id = self.layerPage[self.layer]['data']
        except KeyError:
            id = None
        
        if event.GetSelection() == 0 and id:
            win = self.FindWindowById(id)
            if win:
                self.log.write(_("Number of loaded records: %d") % win.GetItemCount())
            else:
                self.log.write("")
        else:
            self.log.write("")
        
        event.Skip()
        
    def OnLayerRightUp(self, event):
        """Layer description area, context menu"""
        pass

    def OnChangeSql(self, event):
        """Switch simple/advanced sql statement"""
        if self.FindWindowById(self.layerPage[self.layer]['simple']).GetValue():
            self.FindWindowById(self.layerPage[self.layer]['where']).Enable(True)
            self.FindWindowById(self.layerPage[self.layer]['statement']).Enable(False)
            self.FindWindowById(self.layerPage[self.layer]['builder']).Enable(False)
        else:
            self.FindWindowById(self.layerPage[self.layer]['where']).Enable(False)
            self.FindWindowById(self.layerPage[self.layer]['statement']).Enable(True)
            self.FindWindowById(self.layerPage[self.layer]['builder']).Enable(True)

    def ApplyCommands(self):
        """Apply changes"""
        # perform GRASS commands (e.g. v.db.addcol)
        if len(self.listOfCommands) > 0:
            for cmd in self.listOfCommands:
                Debug.msg(3, 'AttributeManager.ApplyCommands() cmd=\'%s\'' %
                          ' '.join(cmd))
                gcmd.Command(cmd)

            self.mapDBInfo = VectorDBInfo(self.vectorName)
            table = self.mapDBInfo.layers[self.layer]['table']

            # update table description
            list = self.FindWindowById(self.layerPage[self.layer]['tableData'])
            list.Update(table=self.mapDBInfo.tables[table],
                        columns=self.mapDBInfo.GetColumns(table))
            self.OnTableReload(None)

            # update data list
            list = self.FindWindowById(self.layerPage[self.layer]['data'])
            list.Update(self.mapDBInfo)

            # reset list of commands
            self.listOfCommands = []

        # perform SQL non-select statements (e.g. 'delete from table where cat=1')
        if len(self.listOfSQLStatements) > 0:
            sqlFile = tempfile.NamedTemporaryFile(mode="wt")
            for sql in self.listOfSQLStatements:
                enc = UserSettings.Get(group='atm', key='encoding', subkey='value')
                if not enc and \
                        os.environ.has_key('GRASS_DB_ENCODING'):
                    enc = os.environ['GRASS_DB_ENCODING']
                if enc:
                    sqlFile.file.write(sql.encode(enc) + ';')
                else:
                    sqlFile.file.write(sql + ';')
                sqlFile.file.write(os.linesep)
                sqlFile.file.flush()

            driver   = self.mapDBInfo.layers[self.layer]["driver"]
            database = self.mapDBInfo.layers[self.layer]["database"]

            Debug.msg(3, 'AttributeManger.ApplyCommands(): %s' %
                      ';'.join(["%s" % s for s in self.listOfSQLStatements]))

            gcmd.RunCommand('db.execute',
                            parent = self,
                            input = sqlFile.name,
                            driver = driver,
                            database = database)
            
            # reset list of statements
            self.listOfSQLStatements = []

    def OnApplySqlStatement(self, event):
        """Apply simple/advanced sql statement"""
        keyColumn = -1 # index of key column
        listWin = self.FindWindowById(self.layerPage[self.layer]['data'])
        if self.FindWindowById(self.layerPage[self.layer]['simple']).GetValue():
            # simple sql statement
            whereCol = self.FindWindowById(self.layerPage[self.layer]['whereColumn']).GetStringSelection()
            whereVal = self.FindWindowById(self.layerPage[self.layer]['where']).GetValue().strip()
            try:
                if len(whereVal) > 0:
                    keyColumn = listWin.LoadData(self.layer, where=whereCol + whereVal)
                else:
                    keyColumn = listWin.LoadData(self.layer)
            except gcmd.CmdError, e:
                wx.MessageBox(parent=self,
                              message=_("Loading attribute data failed.\n\n%s") % e.message,
                              caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                self.FindWindowById(self.layerPage[self.layer]['where']).SetValue('')
        else:
            # advanced sql statement
            win = self.FindWindowById(self.layerPage[self.layer]['statement'])
            try:
                cols, where = self.ValidateSelectStatement(win.GetValue())
            except TypeError:
                wx.MessageBox(parent=self,
                              message=_("Loading attribute data failed.\n"
                                        "Invalid SQL select statement.\n\n%s") % win.GetValue(),
                              caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                win.SetValue("SELECT * FROM %s" % self.mapDBInfo.layers[self.layer]['table'])
                cols = None
                where = None
            
            if cols or where:
                try:
                    keyColumn = listWin.LoadData(self.layer, columns=cols,
                                                 where=where)
                except gcmd.CmdError, e:
                    wx.MessageBox(parent=self,
                                  message=_("Loading attribute data failed.\n\n%s") % e.message,
                                  caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
                    win.SetValue("SELECT * FROM %s" % self.mapDBInfo.layers[self.layer]['table'])
        
        # sort by key column
        if keyColumn > -1:
            listWin.SortListItems(col=keyColumn, ascending=True)
        else:
            listWin.SortListItems(col=0, ascending=True) 

        # update statusbar
        self.log.write(_("Number of loaded records: %d") % \
                           self.FindWindowById(self.layerPage[self.layer]['data']).GetItemCount())

    def ValidateSelectStatement(self, statement):
        """Validate SQL select statement

        @return (columns, where)
        @return None on error
        """
        if statement[0:7].lower() != 'select ':
            return None
        
        cols = ''
        index = 7
        for c in statement[index:]:
            if c == ' ':
                break
            cols += c
            index += 1
        if cols == '*':
            cols = None
        else:
            cols = cols.split(',')
        
        tablelen = len(self.mapDBInfo.layers[self.layer]['table'])
        
        if statement[index+1:index+6].lower() != 'from ' or \
                statement[index+6:index+6+tablelen] != '%s' % \
                (self.mapDBInfo.layers[self.layer]['table']):
            return None
        
        if len(statement[index+7+tablelen:]) > 0:
            index = statement.lower().find('where ')
            if index > -1:
                where = statement[index+6:]
            else:
                return None
        else:
            where = None
        
        return (cols, where)
    
    def OnInfoPaneChanged(self, event):
        """Collapse database connection info box"""

        if self.FindWindowById(self.layerPage[self.layer]['dbinfo']).IsExpanded():
            self.FindWindowById(self.layerPage[self.layer]['dbinfo']).SetLabel( \
                self.infoCollapseLabelCol)
        else:
             self.FindWindowById(self.layerPage[self.layer]['dbinfo']).SetLabel( \
                 self.infoCollapseLabelExp)

        # redo layout
        self.Layout()

    def MakeInfoPaneContent(self, layer, pane):
        """Create database connection information content"""
            # connection info
        border = wx.BoxSizer(wx.VERTICAL)

        connectionInfoBox = wx.StaticBox(parent=pane, id=wx.ID_ANY,
                                         label=" %s " % _("Database connection"))
        infoSizer = wx.StaticBoxSizer(connectionInfoBox, wx.VERTICAL)
        infoFlexSizer = wx.FlexGridSizer (cols=2, hgap=1, vgap=1)
        infoFlexSizer.AddGrowableCol(1)

        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="Driver:"))
        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="%s" % \
                                                 self.mapDBInfo.layers[layer]['driver']))
        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="Database:"))
        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="%s" % \
                                                 self.mapDBInfo.layers[layer]['database']))
        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="Table:"))
        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="%s" % \
                                                 self.mapDBInfo.layers[layer]['table']))
        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="Key:"))
        infoFlexSizer.Add(item=wx.StaticText(parent=pane, id=wx.ID_ANY,
                                             label="%s" % \
                                                 self.mapDBInfo.layers[layer]['key']))

        infoSizer.Add(item=infoFlexSizer,
                      proportion=1,
                      flag=wx.EXPAND | wx.ALL,
                      border=3)

        border.Add(item=infoSizer,
                   proportion=1,
                   flag=wx.EXPAND | wx.ALL,
                   border=3)

        pane.SetSizer(border)

    def OnCloseWindow(self, event):
        """Cancel button pressed"""
        self.Close()
        event.Skip()

    def OnBuilder(self,event):
        """SQL Builder button pressed"""
        self.builder = sqlbuilder.SQLFrame(parent=self, id=wx.ID_ANY,
                                           title=_("SQL Builder"),
                                           vectorName=self.vectorName)
    def OnTextEnter(self, event):
        pass

    def OnSQLBuilder(self, event):
        pass

    def OnDataItemActivated(self, event):
        """Item activated, highlight selected item"""
        self.OnDataDrawSelected(event)

        event.Skip()

    def OnExtractSelected(self, event):
        """
        Extract vector objects selected in attribute browse window
        to new vector map
        """
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        # cats = list.selectedCats[:]
        cats = list.GetSelectedItems()
        if len(cats) == 0:
            wx.MessageBox(parent=self,
                          message=_('Nothing to extract.'),
                          caption=_('Message'), style=wx.CENTRE)
            return
        else:
            # dialog to get file name
            gdialogs.CreateNewVector(parent=self, title=_('Extract selected features'),
                                     log=self.cmdLog,
                                     cmdDef=(["v.extract",
                                              "input=%s" % self.vectorName,
                                              "list=%s" % utils.ListOfCatsToRange(cats)],
                                             "output"))
    def OnDeleteSelected(self, event):
        """
        Delete vector objects selected in attribute browse window
        (attribures and geometry)
        """
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        cats = list.GetSelectedItems()
        if len(cats) == 0:
            wx.MessageBox(parent=self,
                          message=_('Nothing to delete.'),
                          caption=_('Message'), style=wx.CENTRE)
        
        if self.OnDataItemDelete(None):
            digitToolbar = self.mapdisplay.toolbars['vdigit']
            if digitToolbar and digitToolbar.GetLayer() and \
                    digitToolbar.GetLayer().GetName() == self.vectorName:
                self.mapdisplay.digit.driver.SetSelected(map(int, cats), field=self.layer)
                self.mapdisplay.digit.DeleteSelectedLines()
            else:
                gcmd.RunCommand('v.edit',
                                parent = self,
                                quiet = True,
                                map = self.vectorName,
                                tool = 'delete',
                                cats = utils.ListOfCatsToRange(cats))
                
            self.mapdisplay.MapWindow.UpdateMap(render=True, renderVector=True)
        
    def AddQueryMapLayer(self):
        """Redraw a map

        Return True if map has been redrawn, False if no map is given
        """
        list = self.FindWindowById(self.layerPage[self.layer]['data'])
        cats = { 
            self.layer : list.GetSelectedItems()
            }
        
        if self.mapdisplay.Map.GetLayerIndex(self.qlayer) < 0:
            self.qlayer = None
            
        if self.qlayer:
            self.qlayer.SetCmd(self.mapdisplay.AddTmpVectorMapLayer(self.vectorName, cats, addLayer=False))
        else:
            self.qlayer = self.mapdisplay.AddTmpVectorMapLayer(self.vectorName, cats)

        return self.qlayer
    
    def UpdateDialog(self, layer):
        """Updates dialog layout for given layer"""
        #
        # delete page
        #
        if layer in self.mapDBInfo.layers.keys():
            # delete page
            # draging pages disallowed
            # if self.browsePage.GetPageText(page).replace('Layer ', '').strip() == str(layer):
            # self.browsePage.DeletePage(page)
            # break
            self.browsePage.DeletePage(self.mapDBInfo.layers.keys().index(layer))
            self.manageTablePage.DeletePage(self.mapDBInfo.layers.keys().index(layer))
            # set current page selection
            self.notebook.SetSelection(2)
            
        # fetch fresh db info
        self.mapDBInfo = VectorDBInfo(self.vectorName)    

        #
        # add new page
        #
        if layer in self.mapDBInfo.layers.keys():
            # 'browse data' page
            self.__createBrowsePage(layer)
            # 'manage tables' page
            self.__createManageTablePage(layer)
            # set current page selection
            self.notebook.SetSelection(2)
            
        #
        # 'manage layers' page
        #
        # update list of layers
        self.layerList.Update(self.mapDBInfo.layers)
        self.layerList.Populate(update=True)
        # update selected widgets
        listOfLayers = map(str, self.mapDBInfo.layers.keys())
        ### delete layer page
        self.manageLayerBook.deleteLayer.SetItems(listOfLayers)
        if len(listOfLayers) > 0:
            self.manageLayerBook.deleteLayer.SetStringSelection(listOfLayers[0])
            tableName = self.mapDBInfo.layers[int(listOfLayers[0])]['table']
            maxLayer = max(self.mapDBInfo.layers.keys())
        else:
            tableName = ''
            maxLayer = 0
        self.manageLayerBook.deleteTable.SetLabel( \
            _('Drop also linked attribute table (%s)') % \
                tableName)
        ### add layer page
        self.manageLayerBook.addLayerWidgets['layer'][1].SetValue(\
            maxLayer+1)
        ### modify layer
        self.manageLayerBook.modifyLayerWidgets['layer'][1].SetItems(listOfLayers)
        self.manageLayerBook.OnChangeLayer(event=None)
        
class TableListCtrl(wx.ListCtrl,
                    listmix.ListCtrlAutoWidthMixin):
                    #                    listmix.TextEditMixin):
    """Table description list"""

    def __init__(self, parent, id, table, columns, pos=wx.DefaultPosition,
                 size=wx.DefaultSize):

        self.parent  = parent
        self.table   = table
        self.columns = columns
        wx.ListCtrl.__init__(self, parent, id, pos, size,
                             style=wx.LC_REPORT | wx.LC_HRULES | wx.LC_VRULES |
                             wx.BORDER_NONE)

        listmix.ListCtrlAutoWidthMixin.__init__(self)
        # listmix.TextEditMixin.__init__(self)

    def Update(self, table, columns):
        """Update column description"""
        self.table   = table
        self.columns = columns

    def Populate(self, update=False):
        """Populate the list"""
        itemData = {} # requested by sorter

        if not update:
            headings = [_("Column name"), _("Data type"), _("Data length")]
            i = 0
            for h in headings:
                self.InsertColumn(col=i, heading=h)
                self.SetColumnWidth(col=i, width=150)
                i += 1
        else:
            self.DeleteAllItems()

        i = 0
        for column in self.columns:
            index = self.InsertStringItem(sys.maxint, str(column))
            self.SetStringItem(index, 0, str(column))
            self.SetStringItem(index, 1, str(self.table[column]['type']))
            self.SetStringItem(index, 2, str(self.table[column]['length']))
            self.SetItemData(index, i)
            itemData[i] = (str(column),
                           str(self.table[column]['type']),
                           int(self.table[column]['length']))
            i = i + 1

        self.SendSizeEvent()
        
        return itemData

class LayerListCtrl(wx.ListCtrl,
                    listmix.ListCtrlAutoWidthMixin):
                    # listmix.ColumnSorterMixin):
                    # listmix.TextEditMixin):
    """Layer description list"""

    def __init__(self, parent, id, layers,
                 pos=wx.DefaultPosition,
                 size=wx.DefaultSize):

        self.parent = parent
        self.layers = layers
        wx.ListCtrl.__init__(self, parent, id, pos, size,
                             style=wx.LC_REPORT | wx.LC_HRULES | wx.LC_VRULES |
                             wx.BORDER_NONE)

        listmix.ListCtrlAutoWidthMixin.__init__(self)
        # listmix.TextEditMixin.__init__(self)

    def Update(self, layers):
        """Update description"""
        self.layers = layers

    def Populate(self, update=False):
        """Populate the list"""
        itemData = {} # requested by sorter

        if not update:
            headings = [_("Layer"),  _("Driver"), _("Database"), _("Table"), _("Key")]
            i = 0
            for h in headings:
                self.InsertColumn(col=i, heading=h)
                i += 1
        else:
            self.DeleteAllItems()

        i = 0
        for layer in self.layers.keys():
            index = self.InsertStringItem(sys.maxint, str(layer))
            self.SetStringItem(index, 0, str(layer))
            database = str(self.layers[layer]['database'])
            driver   = str(self.layers[layer]['driver'])
            table    = str(self.layers[layer]['table'])
            key      = str(self.layers[layer]['key'])
            self.SetStringItem(index, 1, driver)
            self.SetStringItem(index, 2, database)
            self.SetStringItem(index, 3, table)
            self.SetStringItem(index, 4, key)
            self.SetItemData(index, i)
            itemData[i] = (str(layer),
                           driver,
                           database,
                           table,
                           key)
            i += 1

        for i in range(self.GetColumnCount()):
            self.SetColumnWidth(col=i, width=wx.LIST_AUTOSIZE)
            if self.GetColumnWidth(col=i) < 60:
                self.SetColumnWidth(col=i, width=60)

        self.SendSizeEvent()
        
        return itemData

class LayerBook(wx.Notebook):
    """Manage layers (add, delete, modify)"""
    def __init__(self, parent, id,
                 parentDialog,
                 style=wx.BK_DEFAULT):
        wx.Notebook.__init__(self, parent, id, style=style)

        self.parent       = parent
        self.parentDialog = parentDialog
        self.mapDBInfo    = self.parentDialog.mapDBInfo

        #
        # drivers
        #
        drivers = gcmd.RunCommand('db.drivers',
                                  quiet = True,
                                  read = True,
                                  flags = 'p')
        
        self.listOfDrivers = []
        for drv in drivers.splitlines():
            self.listOfDrivers.append(drv.strip())
        
        #
        # get default values
        #
        self.defaultConnect = {}
        connect = gcmd.RunCommand('db.connect',
                                  flags = 'p',
                                  read = True,
                                  quiet = True)
        
        for line in connect.splitlines():
            item, value = line.split(':')
            self.defaultConnect[item.strip()] = value.strip()
        
        if len(self.defaultConnect['driver']) == 0 or \
               len(self.defaultConnect['database']) == 0:
            raise gcmd.DBMError(_('Unable to determine default DB connection settings. '
                                  'Please define DB connection using db.connect module.'))
        
        self.defaultTables = self.__getTables(self.defaultConnect['driver'],
                                              self.defaultConnect['database'])
        try:
            self.defaultColumns = self.__getColumns(self.defaultConnect['driver'],
                                                    self.defaultConnect['database'],
                                                    self.defaultTables[0])
        except IndexError:
            self.defaultColumns = []

        self.__createAddPage()
        self.__createDeletePage()
        self.__createModifyPage()

    def __createAddPage(self):
        """Add new layer"""
        self.addPanel = wx.Panel(parent=self, id=wx.ID_ANY)
        self.AddPage(page=self.addPanel, text=_("Add layer"))

        try:
            maxLayer = max(self.mapDBInfo.layers.keys())
        except ValueError:
            maxLayer = 0
        #
        # list of layer widgets (label, value)
        #
        self.addLayerWidgets = {'layer':
                                    (wx.StaticText(parent=self.addPanel, id=wx.ID_ANY,
                                                   label='%s:' % _("Layer")),
                                     wx.SpinCtrl(parent=self.addPanel, id=wx.ID_ANY, size=(65, -1),
                                                 initial=maxLayer+1,
                                                 min=1, max=1e6)),
                                'driver':
                                    (wx.StaticText(parent=self.addPanel, id=wx.ID_ANY,
                                                   label='%s:' % _("Driver")),
                                     wx.Choice(parent=self.addPanel, id=wx.ID_ANY, size=(200, -1),
                                               choices=self.listOfDrivers)),
                                'database':
                                    (wx.StaticText(parent=self.addPanel, id=wx.ID_ANY,
                                                   label='%s:' % _("Database")),
                                     wx.TextCtrl(parent=self.addPanel, id=wx.ID_ANY,
                                                 value='',
                                                 style=wx.TE_PROCESS_ENTER)),
                                'table':
                                    (wx.StaticText(parent=self.addPanel, id=wx.ID_ANY,
                                                   label='%s:' % _("Table")),
                                     wx.Choice(parent=self.addPanel, id=wx.ID_ANY, size=(200, -1),
                                               choices=self.defaultTables)),
                                'key':
                                    (wx.StaticText(parent=self.addPanel, id=wx.ID_ANY,
                                                   label='%s:' % _("Key column")),
                                     wx.Choice(parent=self.addPanel, id=wx.ID_ANY, size=(200, -1),
                                               choices=self.defaultColumns)),
                                'addCat':
                                    (wx.CheckBox(parent=self.addPanel, id=wx.ID_ANY,
                                                 label=_("Insert record for each category into table")),
                                     None),
                                }
        
        # set default values for widgets
        self.addLayerWidgets['driver'][1].SetStringSelection(self.defaultConnect['driver'])
        self.addLayerWidgets['database'][1].SetValue(self.defaultConnect['database'])
        self.addLayerWidgets['table'][1].SetSelection(0)
        self.addLayerWidgets['key'][1].SetSelection(0)
        # events
        self.addLayerWidgets['driver'][1].Bind(wx.EVT_CHOICE, self.OnDriverChanged)
        self.addLayerWidgets['database'][1].Bind(wx.EVT_TEXT_ENTER, self.OnDatabaseChanged)
        self.addLayerWidgets['table'][1].Bind(wx.EVT_CHOICE, self.OnTableChanged)

        # tooltips
        self.addLayerWidgets['addCat'][0].SetToolTipString(_("You need to add categories "
                                                             "by v.category module."))
        #
        # list of table widgets
        #
        keyCol = UserSettings.Get(group='atm', key='keycolumn', subkey='value')
        self.tableWidgets = {'table': (wx.StaticText(parent=self.addPanel, id=wx.ID_ANY,
                                                     label='%s:' % _("Table name")),
                                       wx.TextCtrl(parent=self.addPanel, id=wx.ID_ANY,
                                                   value='',
                                                   style=wx.TE_PROCESS_ENTER)),
                             'key': (wx.StaticText(parent=self.addPanel, id=wx.ID_ANY,
                                                   label='%s:' % _("Key column")),
                                     wx.TextCtrl(parent=self.addPanel, id=wx.ID_ANY,
                                                 value=keyCol,
                                                 style=wx.TE_PROCESS_ENTER))}
        # events
        self.tableWidgets['table'][1].Bind(wx.EVT_TEXT_ENTER, self.OnCreateTable)
        self.tableWidgets['key'][1].Bind(wx.EVT_TEXT_ENTER, self.OnCreateTable)

        btnTable   = wx.Button(self.addPanel, wx.ID_ANY, _("&Create table"),
                             size=(125,-1))
        btnTable.Bind(wx.EVT_BUTTON, self.OnCreateTable)

        btnLayer   = wx.Button(self.addPanel, wx.ID_ANY, _("&Add layer"),
                             size=(125,-1))
        btnLayer.Bind(wx.EVT_BUTTON, self.OnAddLayer)

        btnDefault = wx.Button(self.addPanel, wx.ID_ANY, _("&Set default"),
                               size=(125,-1))
        btnDefault.Bind(wx.EVT_BUTTON, self.OnSetDefault)

        #
        # do layout
        #
        pageSizer = wx.BoxSizer(wx.HORIZONTAL)

        #
        # layer description
        #
        layerBox = wx.StaticBox (parent=self.addPanel, id=wx.ID_ANY,
                                 label=" %s " % (_("Layer description")))
        layerSizer = wx.StaticBoxSizer(layerBox, wx.VERTICAL)

        # data area
        dataSizer = wx.GridBagSizer(hgap=5, vgap=5)
        dataSizer.AddGrowableCol(1)
        row = 0
        for key in ('layer', 'driver', 'database', 'table', 'key', 'addCat'):
            label, value = self.addLayerWidgets[key]
            if not value:
                span = (1, 2)
            else:
                span = (1, 1)
            dataSizer.Add(item=label,
                          flag=wx.ALIGN_CENTER_VERTICAL, pos=(row, 0),
                          span=span)
            
            if not value:
                row += 1
                continue

            if label.GetLabel() == "Layer:":
                style = wx.ALIGN_CENTER_VERTICAL | wx.ALIGN_LEFT
            else:
                style = wx.ALIGN_CENTER_VERTICAL | wx.EXPAND
            
            dataSizer.Add(item=value,
                          flag=style, pos=(row, 1))
            
            row += 1
        
        layerSizer.Add(item=dataSizer,
                       proportion=1,
                       flag=wx.ALL | wx.EXPAND,
                       border=5)

        btnSizer = wx.BoxSizer(wx.HORIZONTAL)
        btnSizer.Add(item=btnDefault,
                     proportion=0,
                     flag=wx.ALL | wx.ALIGN_LEFT,
                     border=5)

        btnSizer.Add(item=(5, 5),
                     proportion=1,
                     flag=wx.ALL | wx.EXPAND,
                     border=5)

        btnSizer.Add(item=btnLayer,
                     proportion=0,
                     flag=wx.ALL | wx.ALIGN_RIGHT,
                     border=5)

        layerSizer.Add(item=btnSizer,
                       proportion=0,
                       flag=wx.ALL | wx.EXPAND,
                       border=0)

        #
        # table description
        #
        tableBox = wx.StaticBox (parent=self.addPanel, id=wx.ID_ANY,
                                 label=" %s " % (_("Table description")))
        tableSizer = wx.StaticBoxSizer(tableBox, wx.VERTICAL)

        # data area
        dataSizer = wx.FlexGridSizer(cols=2, hgap=5, vgap=5)
        dataSizer.AddGrowableCol(1)
        for key in ['table', 'key']:
            label, value = self.tableWidgets[key]
            dataSizer.Add(item=label,
                          flag=wx.ALIGN_CENTER_VERTICAL)
            dataSizer.Add(item=value,
                          flag=wx.ALIGN_CENTER_VERTICAL | wx.EXPAND)

        tableSizer.Add(item=dataSizer,
                       proportion=1,
                       flag=wx.ALL | wx.EXPAND,
                       border=5)

        tableSizer.Add(item=btnTable,
                       proportion=0,
                       flag=wx.ALL | wx.ALIGN_BOTTOM | wx.ALIGN_RIGHT,
                       border=5)


        pageSizer.Add(item=layerSizer,
                      proportion=3,
                      flag=wx.ALL | wx.EXPAND,
                      border=5)

        pageSizer.Add(item=tableSizer,
                      proportion=2,
                      flag=wx.ALL | wx.EXPAND,
                      border=5)

        self.addPanel.SetSizer(pageSizer)

    def __createDeletePage(self):
        """Delete layer"""
        self.deletePanel = wx.Panel(parent=self, id=wx.ID_ANY)
        self.AddPage(page=self.deletePanel, text=_("Delete layer"))

        label = wx.StaticText(parent=self.deletePanel, id=wx.ID_ANY,
                              label='%s:' % _("Layer to detele"))

        self.deleteLayer = wx.ComboBox(parent=self.deletePanel, id=wx.ID_ANY, size=(100, -1),
                                       style=wx.CB_SIMPLE | wx.CB_READONLY,
                                       choices=map(str, self.mapDBInfo.layers.keys()))
        self.deleteLayer.SetSelection(0)           
        self.deleteLayer.Bind(wx.EVT_COMBOBOX, self.OnChangeLayer)

        try:
            tableName = self.mapDBInfo.layers[int(self.deleteLayer.GetStringSelection())]['table']
        except ValueError:
            tableName = ''
            
        self.deleteTable = wx.CheckBox(parent=self.deletePanel, id=wx.ID_ANY,
                                       label=_('Drop also linked attribute table (%s)') % \
                                       tableName)

        if tableName == '':
            self.deleteLayer.Enable(False)
            self.deleteTable.Enable(False)
            
        btnDelete   = wx.Button(self.deletePanel, wx.ID_DELETE, _("&Delete layer"),
                                size=(125,-1))
        btnDelete.Bind(wx.EVT_BUTTON, self.OnDeleteLayer)

        #
        # do layout
        #
        pageSizer = wx.BoxSizer(wx.VERTICAL)

        dataSizer = wx.BoxSizer(wx.VERTICAL)

        flexSizer = wx.FlexGridSizer(cols=2, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(2)

        flexSizer.Add(item=label,
                      flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(item=self.deleteLayer,
                      flag=wx.ALIGN_CENTER_VERTICAL)

        dataSizer.Add(item=flexSizer,
                      proportion=0,
                      flag=wx.ALL | wx.EXPAND,
                      border=5)

        dataSizer.Add(item=self.deleteTable,
                      proportion=0,
                      flag=wx.ALL | wx.EXPAND,
                      border=5)

        pageSizer.Add(item=dataSizer,
                      proportion=1,
                      flag=wx.ALL | wx.EXPAND,
                      border=5)

        pageSizer.Add(item=btnDelete,
                       proportion=0,
                       flag=wx.ALL | wx.ALIGN_RIGHT,
                       border=5)

        self.deletePanel.SetSizer(pageSizer)

    def __createModifyPage(self):
        """Modify layer"""
        self.modifyPanel = wx.Panel(parent=self, id=wx.ID_ANY)
        self.AddPage(page=self.modifyPanel, text=_("Modify layer"))

        #
        # list of layer widgets (label, value)
        #
        self.modifyLayerWidgets = {'layer':
                                       (wx.StaticText(parent=self.modifyPanel, id=wx.ID_ANY,
                                                      label='%s:' % _("Layer")),
                                        wx.ComboBox(parent=self.modifyPanel, id=wx.ID_ANY,
                                                    size=(100, -1),
                                                    style=wx.CB_SIMPLE | wx.CB_READONLY,
                                                    choices=map(str, 
                                                                self.mapDBInfo.layers.keys()))),
                                   'driver':
                                       (wx.StaticText(parent=self.modifyPanel, id=wx.ID_ANY,
                                                      label='%s:' % _("Driver")),
                                        wx.Choice(parent=self.modifyPanel, id=wx.ID_ANY,
                                                  size=(200, -1),
                                                  choices=self.listOfDrivers)),
                                   'database':
                                       (wx.StaticText(parent=self.modifyPanel, id=wx.ID_ANY,
                                                      label='%s:' % _("Database")),
                                        wx.TextCtrl(parent=self.modifyPanel, id=wx.ID_ANY,
                                                    value='', size=(350, -1),
                                                    style=wx.TE_PROCESS_ENTER)),
                                   'table':
                                       (wx.StaticText(parent=self.modifyPanel, id=wx.ID_ANY,
                                                      label='%s:' % _("Table")),
                                        wx.Choice(parent=self.modifyPanel, id=wx.ID_ANY,
                                                  size=(200, -1),
                                                  choices=self.defaultTables)),
                                   'key':
                                       (wx.StaticText(parent=self.modifyPanel, id=wx.ID_ANY,
                                                      label='%s:' % _("Key column")),
                                        wx.Choice(parent=self.modifyPanel, id=wx.ID_ANY,
                                                  size=(200, -1),
                                                  choices=self.defaultColumns))}
        
        # set default values for widgets
        self.modifyLayerWidgets['layer'][1].SetSelection(0)
        try:
            layer = int(self.modifyLayerWidgets['layer'][1].GetStringSelection())
        except ValueError:
            layer = None
            for label in self.modifyLayerWidgets.keys():
                self.modifyLayerWidgets[label][1].Enable(False)

        if layer:
            driver   = self.mapDBInfo.layers[layer]['driver']
            database = self.mapDBInfo.layers[layer]['database']
            table    = self.mapDBInfo.layers[layer]['table']

            listOfColumns = self.__getColumns(driver, database, table)
            self.modifyLayerWidgets['driver'][1].SetStringSelection(driver)
            self.modifyLayerWidgets['database'][1].SetValue(database)
            if table in self.modifyLayerWidgets['table'][1].GetItems():
                self.modifyLayerWidgets['table'][1].SetStringSelection(table)
            else:
                if self.defaultConnect['schema'] != '':
                    table = self.defaultConnect['schema'] + table # try with default schema
                else:
                    table = 'public.' + table # try with 'public' schema
                self.modifyLayerWidgets['table'][1].SetStringSelection(table)
            self.modifyLayerWidgets['key'][1].SetItems(listOfColumns)
            self.modifyLayerWidgets['key'][1].SetSelection(0)

        # events
        self.modifyLayerWidgets['layer'][1].Bind(wx.EVT_COMBOBOX, self.OnChangeLayer)
        # self.modifyLayerWidgets['driver'][1].Bind(wx.EVT_CHOICE, self.OnDriverChanged)
        # self.modifyLayerWidgets['database'][1].Bind(wx.EVT_TEXT_ENTER, self.OnDatabaseChanged)
        # self.modifyLayerWidgets['table'][1].Bind(wx.EVT_CHOICE, self.OnTableChanged)

        btnModify = wx.Button(self.modifyPanel, wx.ID_DELETE, _("&Modify layer"),
                              size=(125,-1))
        btnModify.Bind(wx.EVT_BUTTON, self.OnModifyLayer)

        #
        # do layout
        #
        pageSizer = wx.BoxSizer(wx.VERTICAL)

        # data area
        dataSizer = wx.FlexGridSizer(cols=2, hgap=5, vgap=5)
        dataSizer.AddGrowableCol(1)
        for key in ('layer', 'driver', 'database', 'table', 'key'):
            label, value = self.modifyLayerWidgets[key]
            dataSizer.Add(item=label,
                          flag=wx.ALIGN_CENTER_VERTICAL)
            if label.GetLabel() == "Layer:":
                dataSizer.Add(item=value,
                              flag=wx.ALIGN_CENTER_VERTICAL | wx.ALIGN_LEFT)
            else:
                dataSizer.Add(item=value,
                              flag=wx.ALIGN_CENTER_VERTICAL)

        pageSizer.Add(item=dataSizer,
                      proportion=1,
                      flag=wx.ALL | wx.EXPAND,
                      border=5)

        pageSizer.Add(item=btnModify,
                      proportion=0,
                      flag=wx.ALL | wx.ALIGN_RIGHT,
                      border=5)

        self.modifyPanel.SetSizer(pageSizer)

    def __getTables(self, driver, database):
        """Get list of tables for given driver and database"""
        tables = []

        ret = gcmd.RunCommand('db.tables',
                              parent = self,
                              read = True,
                              flags = 'p',
                              driver = driver,
                              database = database)
        
        if ret is None:
            wx.MessageBox(parent=self,
                          message=_("Unable to get list of tables.\n"
                                    "Please use db.connect to set database parameters."),
                          caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
            
            return tables
        
        for table in ret.splitlines():
            tables.append(table)
        
        return tables

    def __getColumns(self, driver, database, table):
        """Get list of column of given table"""
        columns = []

        ret = gcmd.RunCommand('db.columns',
                              parent = self,
                              quiet = True,
                              read = True,
                              driver = driver,
                              database = database,
                              table = table)
        
        if ret == None:
            return columns
        
        for column in ret.splitlines():
            columns.append(column)
        
        return columns

    def OnDriverChanged(self, event):
        """Driver selection changed, update list of tables"""
        driver = event.GetString()
        database = self.addLayerWidgets['database'][1].GetValue()

        winTable = self.addLayerWidgets['table'][1]
        winKey   = self.addLayerWidgets['key'][1]
        tables   = self.__getTables(driver, database)

        winTable.SetItems(tables)
        winTable.SetSelection(0)

        if len(tables) == 0:
            winKey.SetItems([])

        event.Skip()

    def OnDatabaseChanged(self, event):
        """Database selection changed, update list of tables"""
        event.Skip()

    def OnTableChanged(self, event):
        """Table name changed, update list of columns"""
        driver   = self.addLayerWidgets['driver'][1].GetStringSelection()
        database = self.addLayerWidgets['database'][1].GetValue()
        table    = event.GetString()

        win  = self.addLayerWidgets['key'][1]
        cols = self.__getColumns(driver, database, table)
        win.SetItems(cols)
        win.SetSelection(0)

        event.Skip()

    def OnSetDefault(self, event):
        """Set default values"""
        driver   = self.addLayerWidgets['driver'][1]
        database = self.addLayerWidgets['database'][1]
        table    = self.addLayerWidgets['table'][1]
        key      = self.addLayerWidgets['key'][1]

        driver.SetStringSelection(self.defaultConnect['driver'])
        database.SetValue(self.defaultConnect['database'])
        tables = self.__getTables(self.defaultConnect['driver'],
                                  self.defaultConnect['database'])
        table.SetItems(tables)
        table.SetSelection(0)
        if len(tables) == 0:
            key.SetItems([])
        else:
            cols = self.__getColumns(self.defaultConnect['driver'],
                                     self.defaultConnect['database'],
                                     tables[0])
            key.SetItems(cols)
            key.SetSelection(0)

        event.Skip()

    def OnCreateTable(self, event):
        """Create new table (name and key column given)"""
        driver   = self.addLayerWidgets['driver'][1].GetStringSelection()
        database = self.addLayerWidgets['database'][1].GetValue()
        table    = self.tableWidgets['table'][1].GetValue()
        key      = self.tableWidgets['key'][1].GetValue()
        
        if not table or not key:
            wx.MessageBox(parent=self,
                          message=_("Unable to create new table. "
                                    "Table name or key column name is missing."),
                          caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
            return

        if table in self.addLayerWidgets['table'][1].GetItems():
            wx.MessageBox(parent=self,
                          message=_("Unable to create new table. "
                                    "Table <%s> already exists in the database.") % table,
                          caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
            return
        
        # create table
        sql = 'CREATE TABLE %s (%s INTEGER)' % (table, key)

        gcmd.RunCommand('db.execute',
                        quiet = True,
                        parent = self,
                        stdin = sql,
                        driver = driver,
                        database = database)
        
        # update list of tables
        tableList = self.addLayerWidgets['table'][1]
        tableList.SetItems(self.__getTables(driver, database))
        tableList.SetStringSelection(table)

        # update key column selection
        keyList = self.addLayerWidgets['key'][1]
        keyList.SetItems(self.__getColumns(driver, database, table))
        keyList.SetStringSelection(key)
        
        event.Skip()

    def OnAddLayer(self, event):
        """Add new layer to vector map"""
        layer    = int(self.addLayerWidgets['layer'][1].GetValue())
        layerWin = self.addLayerWidgets['layer'][1]
        driver   = self.addLayerWidgets['driver'][1].GetStringSelection()
        database = self.addLayerWidgets['database'][1].GetValue()
        table    = self.addLayerWidgets['table'][1].GetStringSelection()
        key      = self.addLayerWidgets['key'][1].GetStringSelection()
        
        if layer in self.mapDBInfo.layers.keys():
            wx.MessageBox(parent=self,
                          message=_("Unable to add new layer to vector map <%(vector)s>. "
                                    "Layer %(layer)d already exists.") % 
                          {'vector' : self.mapDBInfo.map, 'layer' : layer},
                          caption=_("Error"), style=wx.OK | wx.ICON_ERROR | wx.CENTRE)
            return

        # add new layer
        ret = gcmd.RunCommand('v.db.connect',
                              parent = self,
                              quiet = True,
                              map = self.mapDBInfo.map,
                              driver = driver,
                              database = database,
                              table = table,
                              key = key,
                              layer = layer)
        
        # insert records into table if required
        if self.addLayerWidgets['addCat'][0].IsChecked():
            gcmd.RunCommand('v.to.db',
                            parent = self,
                            quiet = True,
                            map = self.mapDBInfo.map,
                            layer = layer,
                            qlayer = layer,
                            option = 'cat',
                            columns = key)

        if ret == 0:
            # update dialog (only for new layer)
            self.parentDialog.UpdateDialog(layer=layer) 
            # update db info
            self.mapDBInfo = self.parentDialog.mapDBInfo
            # increase layer number
            layerWin.SetValue(layer+1)

        if len(self.mapDBInfo.layers.keys()) == 1:
            # first layer add --- enable previously disabled widgets
            self.deleteLayer.Enable()
            self.deleteTable.Enable()
            for label in self.modifyLayerWidgets.keys():
                self.modifyLayerWidgets[label][1].Enable()
            
    def OnDeleteLayer(self, event):
        """Delete layer"""
        try:
            layer = int(self.deleteLayer.GetValue())
        except:
            return

        gcmd.RunCommand('v.db.connect',
                        parent = self,
                        flags = 'd',
                        map = self.mapDBInfo.map,
                        layer = layer)

        # drop also table linked to layer which is deleted
        if self.deleteTable.IsChecked():
            driver   = self.addLayerWidgets['driver'][1].GetStringSelection()
            database = self.addLayerWidgets['database'][1].GetValue()
            table    = self.mapDBInfo.layers[layer]['table']
            sql      = 'DROP TABLE %s' % (table)

            gcmd.RunCommand('db.execute',
                            parent = self,
                            stdin = sql,
                            quiet = True,
                            driver = driver,
                            database = database)
            
            # update list of tables
            tableList = self.addLayerWidgets['table'][1]
            tableList.SetItems(self.__getTables(driver, database))
            tableList.SetStringSelection(table)
        
        # update dialog
        self.parentDialog.UpdateDialog(layer=layer) 
        # update db info
        self.mapDBInfo = self.parentDialog.mapDBInfo

        if len(self.mapDBInfo.layers.keys()) == 0:
            # disable selected widgets
            self.deleteLayer.Enable(False)
            self.deleteTable.Enable(False)
            for label in self.modifyLayerWidgets.keys():
                self.modifyLayerWidgets[label][1].Enable(False)
            
        event.Skip()

    def OnChangeLayer(self, event):
        """Layer number of layer to be deleted is changed"""
        try:
            layer = int(event.GetString())
        except:
            try:
                layer = self.mapDBInfo.layers.keys()[0]
            except:
                return

        if self.GetCurrentPage() == self.modifyPanel:
            driver   = self.mapDBInfo.layers[layer]['driver']
            database = self.mapDBInfo.layers[layer]['database']
            table    = self.mapDBInfo.layers[layer]['table']
            listOfColumns = self.__getColumns(driver, database, table)
            self.modifyLayerWidgets['driver'][1].SetStringSelection(driver)
            self.modifyLayerWidgets['database'][1].SetValue(database)
            self.modifyLayerWidgets['table'][1].SetStringSelection(table)
            self.modifyLayerWidgets['key'][1].SetItems(listOfColumns)
            self.modifyLayerWidgets['key'][1].SetSelection(0)
        else:
            self.deleteTable.SetLabel(_('Drop also linked attribute table (%s)') % \
                                          self.mapDBInfo.layers[layer]['table'])
        if event:
            event.Skip()

    def OnModifyLayer(self, event):
        """Modify layer connection settings"""

        layer = int(self.modifyLayerWidgets['layer'][1].GetStringSelection())

        modify = False
        if self.modifyLayerWidgets['driver'][1].GetStringSelection() != \
                self.mapDBInfo.layers[layer]['driver'] or \
                self.modifyLayerWidgets['database'][1].GetStringSelection() != \
                self.mapDBInfo.layers[layer]['database'] or \
                self.modifyLayerWidgets['table'][1].GetStringSelection() != \
                self.mapDBInfo.layers[layer]['table'] or \
                self.modifyLayerWidgets['key'][1].GetStringSelection() != \
                self.mapDBInfo.layers[layer]['key']:
            modify = True

        if modify:
            # delete layer
            gcmd.RunCommand('v.db.connect',
                            parent = self,
                            quiet = True,
                            flag = 'd',
                            map = self.mapDBInfo.map,
                            layer = layer)

            # add modified layer
            gcmd.RunCommand('v.db.connect',
                            quiet = True,
                            map = self.mapDBInfo.map,
                            driver = self.modifyLayerWidgets['driver'][1].GetStringSelection(),
                            database = self.modifyLayerWidgets['database'][1].GetValue(),
                            table = self.modifyLayerWidgets['table'][1].GetStringSelection(),
                            key = self.modifyLayerWidgets['key'][1].GetStringSelection(),
                            layer = int(layer))
            
            # update dialog (only for new layer)
            self.parentDialog.UpdateDialog(layer=layer) 
            # update db info
            self.mapDBInfo = self.parentDialog.mapDBInfo

        event.Skip()

class DisplayAttributesDialog(wx.Dialog):
    """
    Standard dialog used to add/update/display attributes linked
    to the vector map.

    Attribute data can be selected based on layer and category number
    or coordinates.

    @param parent
    @param map vector map
    @param query query coordinates and distance (used for v.edit)
    @param cats {layer: cats}
    @param line feature id (requested for cats)
    @param style
    @param pos
    @param action (add, update, display)
    """
    def __init__(self, parent, map,
                 query=None, cats=None, line=None,
                 style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER,
                 pos=wx.DefaultPosition,
                 action="add"):
        self.parent = parent # mapdisplay.BufferedWindow
        self.map    = map
        self.action = action

        # ids/cats of selected features
        # fid : {layer : cats}
        self.cats = {}
        self.fid = -1 # feature id
        
        # get layer/table/column information
        self.mapDBInfo = VectorDBInfo(self.map)
        
        layers = self.mapDBInfo.layers.keys() # get available layers

        # check if db connection / layer exists
        if len(layers) <= 0:
            label = _("Database connection "
                      "is not defined in DB file.")

            wx.MessageBox(parent=self.parent,
                          message=_("No attribute table linked to "
                                    "vector map <%(vector)s> found. %(msg)s"
                                    "\nYou can disable this message from digitization settings. Or "
                                    "you can create and link attribute table to the vector map "
                                    "using Attribute Table Manager.") % 
                          {'vector' : self.map, 'msg' : label},
                          caption=_("Message"), style=wx.OK | wx.ICON_EXCLAMATION | wx.CENTRE)
            self.mapDBInfo = None

        wx.Dialog.__init__(self, parent=self.parent, id=wx.ID_ANY,
                           title="", style=style, pos=pos)

        # dialog body
        mainSizer = wx.BoxSizer(wx.VERTICAL)

        # notebook
        self.notebook = wx.Notebook(parent=self, id=wx.ID_ANY, style=wx.BK_DEFAULT)

        self.closeDialog = wx.CheckBox(parent=self, id=wx.ID_ANY,
                                       label=_("Close dialog on submit"))
        self.closeDialog.SetValue(True)

        # feature id (text/choice for duplicates)
        self.fidMulti = wx.Choice(parent=self, id=wx.ID_ANY,
                                  size=(150, -1))
        self.fidMulti.Bind(wx.EVT_CHOICE, self.OnFeature)
        self.fidText = wx.StaticText(parent=self, id=wx.ID_ANY)

        self.noFoundMsg = wx.StaticText(parent=self, id=wx.ID_ANY,
                                        label=_("No attributes found"))
        
        self.UpdateDialog(query=query, cats=cats)

        # set title
        if self.action == "update":
            self.SetTitle(_("Update attributes"))
        elif self.action == "add":
            self.SetTitle(_("Add attributes"))
        else:
            self.SetTitle(_("Display attributes"))

        # buttons
        btnCancel = wx.Button(self, wx.ID_CANCEL)
        btnReset  = wx.Button(self, wx.ID_UNDO, _("&Reload"))
        btnSubmit = wx.Button(self, wx.ID_OK, _("&Submit"))

        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(btnCancel)
        btnSizer.AddButton(btnReset)
        btnSizer.SetNegativeButton(btnReset)
        btnSubmit.SetDefault()
        btnSizer.AddButton(btnSubmit)
        btnSizer.Realize()

        mainSizer.Add(item=self.noFoundMsg, proportion=0,
                      flag=wx.EXPAND | wx.ALL, border=5)
        mainSizer.Add(item=self.notebook, proportion=1,
                      flag=wx.EXPAND | wx.ALL, border=5)
        fidSizer = wx.BoxSizer(wx.HORIZONTAL)
        fidSizer.Add(item=wx.StaticText(parent=self, id=wx.ID_ANY,
                                        label=_("Feature id:")),
                     proportion=0, border=5,
                     flag=wx.ALIGN_CENTER_VERTICAL)
        fidSizer.Add(item=self.fidMulti, proportion=0,
                     flag=wx.EXPAND | wx.ALL,  border=5)
        fidSizer.Add(item=self.fidText, proportion=0,
                     flag=wx.EXPAND | wx.ALL,  border=5)
        mainSizer.Add(item=fidSizer, proportion=0,
                      flag=wx.EXPAND | wx.LEFT | wx.RIGHT, border=5)
        mainSizer.Add(item=self.closeDialog, proportion=0, flag=wx.EXPAND | wx.LEFT | wx.RIGHT,
                      border=5)
        mainSizer.Add(item=btnSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

        # bindigs
        btnReset.Bind(wx.EVT_BUTTON, self.OnReset)
        btnSubmit.Bind(wx.EVT_BUTTON, self.OnSubmit)
        btnCancel.Bind(wx.EVT_BUTTON, self.OnCancel)

        self.SetSizer(mainSizer)
        mainSizer.Fit(self)

        # set min size for dialog
        w, h = self.GetBestSize()
        if h < 200:
            self.SetMinSize((w, 200))
        else:
            self.SetMinSize(self.GetBestSize())

        if self.notebook.GetPageCount() == 0:
            Debug.msg(2, "DisplayAttributesDialog(): Nothing found!")
            ### self.mapDBInfo = None

    def __SelectAttributes(self, layer):
        """Select attributes"""
        pass

    def OnSQLStatement(self, event):
        """Update SQL statement"""
        pass

    def GetSQLString(self, updateValues=False):
        """Create SQL statement string based on self.sqlStatement

        If updateValues is True, update dataFrame according to values
        in textfields.
        """
        sqlCommands = []
        # find updated values for each layer/category
        for layer in self.mapDBInfo.layers.keys(): # for each layer
            table = self.mapDBInfo.layers[layer]["table"]
            key = self.mapDBInfo.layers[layer]["key"]
            columns = self.mapDBInfo.tables[table]
            for idx in range(len(columns[key]['values'])): # for each category
                updatedColumns = []
                updatedValues = []
                for name in columns.keys():
                    if name == key:
                        cat = columns[name]['values'][idx]
                        continue
                    type  = columns[name]['type']
                    value = columns[name]['values'][idx]
                    id    = columns[name]['ids'][idx]
                    try:
                        newvalue = self.FindWindowById(id).GetValue()
                    except:
                        newvalue = self.FindWindowById(id).GetLabel()

                    if newvalue == '':
                        newvalue = None
                    
                    if newvalue != value:
                        updatedColumns.append(name)
                        if newvalue is None:
                            updatedValues.append('NULL')
                        else:
                            if type != 'character':
                                updatedValues.append(newvalue)
                            else:
                                updatedValues.append("'" + newvalue + "'")
                        columns[name]['values'][idx] = newvalue

                if self.action != "add" and len(updatedValues) == 0:
                    continue

                if self.action == "add":
                    sqlString = "INSERT INTO %s (%s," % (table, key)
                else:
                    sqlString = "UPDATE %s SET " % table

                for idx in range(len(updatedColumns)):
                    name = updatedColumns[idx]
                    if self.action == "add":
                        sqlString += name + ","
                    else:
                        sqlString += name + "=" + updatedValues[idx] + ","

                sqlString = sqlString[:-1] # remove last comma

                if self.action == "add":
                    sqlString += ") VALUES (%s," % cat
                    for value in updatedValues:
                        sqlString += str(value) + ","
                    sqlString = sqlString[:-1] # remove last comma
                    sqlString += ")"
                else:
                    sqlString += " WHERE cat=%s" % cat
                sqlCommands.append(sqlString)
            # for each category
        # for each layer END

        Debug.msg(3, "DisplayAttributesDialog.GetSQLString(): %s" % sqlCommands)

        return sqlCommands

    def OnReset(self, event):
        """Reset form"""
        for layer in self.mapDBInfo.layers.keys():
            table = self.mapDBInfo.layers[layer]["table"]
            key = self.mapDBInfo.layers[layer]["key"]
            columns = self.mapDBInfo.tables[table]
            for idx in range(len(columns[key]['values'])):
                for name in columns.keys():
                    type  = columns[name]['type']
                    value = columns[name]['values'][idx]
                    try:
                        id = columns[name]['ids'][idx]
                    except IndexError:
                        id = wx.NOT_FOUND
                    
                    if name != key and id != wx.NOT_FOUND:
                        self.FindWindowById(id).SetValue(str(value))

    def OnCancel(self, event):
        """Cancel button pressed"""
        self.parent.parent.dialogs['attributes'] = None
        if self.parent.parent.digit:
            self.parent.parent.digit.driver.SetSelected([])
            self.parent.UpdateMap(render=False)
        else:
            self.parent.parent.OnRender(None)

        self.Close()

    def OnSubmit(self, event):
        """Submit records"""
        sqlCommands = self.GetSQLString(updateValues=True)
        if len(sqlCommands) > 0:
            sqlFile = tempfile.NamedTemporaryFile(mode="w")
            for sql in sqlCommands:
                enc = UserSettings.Get(group='atm', key='encoding', subkey='value')
                if not enc and \
                        os.environ.has_key('GRASS_DB_ENCODING'):
                    enc = os.environ['GRASS_DB_ENCODING']
                if enc:
                    sqlFile.file.write(sql.encode(enc))
                else:
                    sqlFile.file.write(sql)
                sqlFile.file.write(os.linesep)
                sqlFile.file.flush()
                gcmd.RunCommand('db.execute',
                                quiet = True,
                                input = sqlFile.name)

        if self.closeDialog.IsChecked():
            self.OnCancel(event)

    def OnFeature(self, event):
        self.fid = int(event.GetString())
        self.UpdateDialog(cats=self.cats, fid=self.fid)
        
    def GetCats(self):
        """Get id of selected vector object or 'None' if nothing selected

        @param id if true return ids otherwise cats
        """
        if self.fid < 0:
            return None
        
        return self.cats[self.fid]

    def GetFid(self):
        """Get selected feature id"""
        return self.fid
    
    def UpdateDialog(self, map=None, query=None, cats=None, fid=-1):
        """Update dialog

        Return True if updated otherwise False
        """
        if map:
            self.map = map
            # get layer/table/column information
            self.mapDBInfo = VectorDBInfo(self.map)
        
        if not self.mapDBInfo:
            return False

        self.mapDBInfo.Reset()

        layers = self.mapDBInfo.layers.keys() # get available layers

        # id of selected line
        if query: # select by position
            data = self.mapDBInfo.SelectByPoint(query[0],
                                                query[1])
            self.cats = {}
            if data and data.has_key('Layer'):
                idx = 0
                for layer in data['Layer']:
                    layer = int(layer)
                    if data.has_key('Id'):
                        tfid = int(data['Id'][idx])
                    else:
                        tfid = 0 # Area / Volume
                    if not self.cats.has_key(tfid):
                        self.cats[tfid] = {}
                    if not self.cats[tfid].has_key(layer):
                        self.cats[tfid][layer] = []
                    cat = int(data['Category'][idx])
                    self.cats[tfid][layer].append(cat)
                    idx += 1
        else:
            self.cats = cats

        if fid > 0:
            self.fid = fid
        elif len(self.cats.keys()) > 0:
            self.fid = self.cats.keys()[0]
        else:
            self.fid = -1
        
        if len(self.cats.keys()) == 1:
            self.fidMulti.Show(False)
            self.fidText.Show(True)
            if self.fid > 0:
                self.fidText.SetLabel("%d" % self.fid)
            else:
                self.fidText.SetLabel(_("Unknown"))
        else:
            self.fidMulti.Show(True)
            self.fidText.Show(False)
            choices = []
            for tfid in self.cats.keys():
                choices.append(str(tfid))
            self.fidMulti.SetItems(choices)
            self.fidMulti.SetStringSelection(str(self.fid))
        
        # reset notebook
        self.notebook.DeleteAllPages()

        for layer in layers: # for each layer
            if not query: # select by layer/cat
                if self.fid > 0 and self.cats[self.fid].has_key(layer): 
                    for cat in self.cats[self.fid][layer]:
                        nselected = self.mapDBInfo.SelectFromTable(layer,
                                                                   where="%s=%d" % \
                                                                   (self.mapDBInfo.layers[layer]['key'],
                                                                    cat))
                else:
                    nselected = 0

            # if nselected <= 0 and self.action != "add":
            #    continue # nothing selected ...

            if self.action == "add":
                if nselected <= 0:
                    if self.cats[self.fid].has_key(layer):
                        table = self.mapDBInfo.layers[layer]["table"]
                        key = self.mapDBInfo.layers[layer]["key"]
                        columns = self.mapDBInfo.tables[table]
                        for name in columns.keys():
                            if name == key:
                                for cat in self.cats[self.fid][layer]:
                                    self.mapDBInfo.tables[table][name]['values'].append(cat)
                            else:
                                self.mapDBInfo.tables[table][name]['values'].append(None)
                else: # change status 'add' -> 'update'
                    self.action = "update"
            
            table   = self.mapDBInfo.layers[layer]["table"]
            key   = self.mapDBInfo.layers[layer]["key"]
            columns = self.mapDBInfo.tables[table]
            
            for idx in range(len(columns[key]['values'])):
                for name in columns.keys():
                    if name == key:
                        cat = int(columns[name]['values'][idx])
                        break

                # use scrolled panel instead (and fix initial max height of the window to 480px)
                panel = scrolled.ScrolledPanel(parent=self.notebook, id=wx.ID_ANY,
                                               size=(-1, 150))
                panel.SetupScrolling(scroll_x=False)
                
                self.notebook.AddPage(page=panel, text=" %s %d / %s %d" % (_("Layer"), layer,
                                                                           _("Category"), cat))
           
                # notebook body
                border = wx.BoxSizer(wx.VERTICAL)

                flexSizer = wx.FlexGridSizer (cols=4, hgap=3, vgap=3)
                flexSizer.AddGrowableCol(3)
                # columns (sorted by index)
                names = [''] * len(columns.keys())
                for name in columns.keys():
                    names[columns[name]['index']] = name
                
                for name in names:
                    if name == key: # skip key column (category)
                        continue
                    
                    vtype  = columns[name]['type']
                    
                    if columns[name]['values'][idx] is not None:
                        if columns[name]['ctype'] != type(''):
                            value = str(columns[name]['values'][idx])
                        else:
                            value = columns[name]['values'][idx]
                    else:
                        value = ''
                        
                    colName = wx.StaticText(parent=panel, id=wx.ID_ANY,
                                            label=name)
                    colType = wx.StaticText(parent=panel, id=wx.ID_ANY,
                                            label="[" + vtype.lower() + "]")
                    delimiter = wx.StaticText(parent=panel, id=wx.ID_ANY, label=":")
                    
                    colValue = wx.TextCtrl(parent=panel, id=wx.ID_ANY, value=value)
                    
                    colValue.SetName(name)
                    self.Bind(wx.EVT_TEXT, self.OnSQLStatement, colValue)
                    
                    flexSizer.Add(colName, proportion=0,
                                  flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
                    flexSizer.Add(colType, proportion=0,
                                  flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
                    flexSizer.Add(delimiter, proportion=0,
                                  flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
                    flexSizer.Add(colValue, proportion=1,
                                  flag=wx.EXPAND | wx.ALIGN_CENTER_VERTICAL)
                    # add widget reference to self.columns
                    columns[name]['ids'].append(colValue.GetId()) # name, type, values, id
                # for each attribute (including category) END
                border.Add(item=flexSizer, proportion=1, flag=wx.ALL | wx.EXPAND, border=5)
                panel.SetSizer(border)
            # for each category END
        # for each layer END

        if self.notebook.GetPageCount() == 0:
            self.noFoundMsg.Show(True)
        else:
            self.noFoundMsg.Show(False)
        
        self.Layout()
        
        return True
        
class VectorDBInfo(gselect.VectorDBInfo):
    """Class providing information about attribute tables
    linked to the vector map"""
    def __init__(self, map):
        gselect.VectorDBInfo.__init__(self, map)
        
    def GetColumns(self, table):
        """Return list of columns names (based on their index)"""
        try:
            names = [''] * len(self.tables[table].keys())
        except KeyError:
            return []
        
        for name, desc in self.tables[table].iteritems():
            names[desc['index']] = name

        return names

    def SelectByPoint(self, queryCoords, qdist):
        """Get attributes by coordinates (all available layers)

        Return line id or None if no line is found"""
        line = None
        nselected = 0
        ret = gcmd.RunCommand('v.what',
                              quiet = True,
                              read = True,
                              flags = 'a',
                              map = self.map,
                              east_north = '%f,%f' % \
                                  (float(queryCoords[0]), float(queryCoords[1])),
                              distance = float(qdist))
        
        data = {}
        if ret:
            readAttrb = False
            for item in ret.splitlines():
                try:
                    key, value = item.split(':', 1)
                except ValueError:
                    continue
                
                if key == 'Layer' and readAttrb:
                    readAttrb = False
                
                if readAttrb:
                    name, value = item.split(':', 1)
                    name = name.strip()
                    value = value.strip()
                    # append value to the column
                    if len(value) < 1:
                        value = None
                    else:
                        if self.tables[table][name]['ctype'] != type(''):
                            value = self.tables[table][name]['ctype'] (value.strip())
                        else:
                            value = unicodeValue(value.strip())
                    self.tables[table][name]['values'].append(value)
                else:
                    if not data.has_key(key):
                        data[key] = []
                    data[key].append(value.strip())
                    
                    if key == 'Table':
                        table = value.strip()
                        
                    if key == 'Key column': # skip attributes
                        readAttrb = True

        return data
    
    def SelectFromTable(self, layer, cols='*', where=None):
        """Select records from the table

        Return number of selected records, -1 on error
        """
        if layer <= 0:
            return -1

        nselected = 0

        table = self.layers[layer]["table"] # get table desc
        # select values (only one record)
        if where is None or where is '':
            sql="SELECT %s FROM %s" % (cols, table)
        else:
            sql="SELECT %s FROM %s WHERE %s" % (cols, table, where)

        ret = gcmd.RunCommand('db.select',
                              parent = self,
                              read = True,
                              quiet = True,
                              flags = 'v',
                              sql= sql,
                              database = self.layers[layer]["database"],
                              driver = self.layers[layer]["driver"])
        
        # self.tables[table][key][1] = str(cat)
        if ret:
            for line in ret.splitlines():
                name, value = line.split('|')
                # casting ...
                if value:
                    if self.tables[table][name]['ctype'] != type(''):
                        value = self.tables[table][name]['ctype'] (value)
                    else:
                        value = unicodeValue(value)
                else:
                    value = None
                self.tables[table][name]['values'].append(value)
                nselected = 1

        return nselected

class ModifyTableRecord(wx.Dialog):
    """Dialog for inserting/updating table record"""
    def __init__(self, parent, id, title, data, keyEditable=(-1, True),
                style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER):
        """
        Notes:
         'Data' is a list: [(column, value)]
         'KeyEditable' (id, editable?) indicates if textarea for key column
          is editable(True) or not.
        """
        wx.Dialog.__init__(self, parent, id, title, style=style)

        self.keyId = keyEditable[0]
        
        self.panel = wx.Panel(parent=self, id=wx.ID_ANY)

        self.dataPanel = scrolled.ScrolledPanel(parent=self.panel, id=wx.ID_ANY,
                                            style=wx.TAB_TRAVERSAL)
        self.dataPanel.SetupScrolling(scroll_x=False)
        
        #
        # buttons
        #
        self.btnCancel = wx.Button(self.panel, wx.ID_CANCEL)
        self.btnSubmit = wx.Button(self.panel, wx.ID_OK, _("Submit"))
        self.btnSubmit.SetDefault()

        #
        # data area
        #
        self.widgets = []
        id = 0
        self.box = False
        self.cat = None
        for column, value in data:
            if keyEditable[0] == id:
                self.cat = int(value)
                if keyEditable[1] == False:
                    self.box = True
                    id += 1
                    continue
                else:
                    valueWin = wx.SpinCtrl(parent=self.dataPanel, id=wx.ID_ANY,
                                           value=value, min=-1e9, max=1e9, size=(250, -1))
            else:
                valueWin = wx.TextCtrl(parent=self.dataPanel, id=wx.ID_ANY,
                                       value=value, size=(250, -1))
                                
            label = wx.StaticText(parent=self.dataPanel, id=wx.ID_ANY,
                                  label=column + ":")

            self.widgets.append((label.GetId(),
                                 valueWin.GetId()))

            id += 1
            
        self.__Layout()

        # winSize = self.GetSize()
        # fix height of window frame if needed
        # if winSize[1] > 480:
        #    winSize[1] = 480
        #    self.SetSize(winSize)
        # self.SetMinSize(winSize)

    def __Layout(self):
        """Do layout"""
        sizer = wx.BoxSizer(wx.VERTICAL)

        if self.box:
            box = wx.StaticBox(parent=self.panel, id=wx.ID_ANY,
                               label=" %s %d " % (_("Category"), self.cat))
            boxSizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        # data area
        dataSizer = wx.FlexGridSizer (cols=2, hgap=3, vgap=3)
        dataSizer.AddGrowableCol(1)

        for labelId, valueId in self.widgets:
            label = self.FindWindowById(labelId)
            value = self.FindWindowById(valueId)

            dataSizer.Add(label, proportion=0,
                          flag=wx.ALIGN_CENTER_VERTICAL)
            dataSizer.Add(value, proportion=0,
                          flag=wx.EXPAND | wx.ALIGN_CENTER_VERTICAL)

        self.dataPanel.SetAutoLayout(True)
        self.dataPanel.SetSizer(dataSizer)
        dataSizer.Fit(self.dataPanel)

        if self.box:
            boxSizer.Add(item=self.dataPanel, proportion=1,
                         flag=wx.EXPAND | wx.ALL, border=5)
            
        # buttons
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(self.btnCancel)
        btnSizer.AddButton(self.btnSubmit)
        btnSizer.Realize()

        if not self.box:
            sizer.Add(item=self.dataPanel, proportion=1,
                      flag=wx.EXPAND | wx.ALL, border=5)
        else:
            sizer.Add(item=boxSizer, proportion=1,
                      flag=wx.EXPAND | wx.ALL, border=5)
            

        sizer.Add(item=btnSizer, proportion=0,
                 flag=wx.EXPAND | wx.ALL, border=5)

        #sizer.SetSizeHints(self.panel)
        self.panel.SetAutoLayout(True)
        self.panel.SetSizer(sizer)
        sizer.Fit(self.panel)

        self.Layout()

        # set window frame size (min & max)
        minFrameHeight = 150
        maxFrameHeight = 2 * minFrameHeight
        if self.GetSize()[1] > minFrameHeight:
            self.SetMinSize((self.GetSize()[0], minFrameHeight))
        else:
            self.SetMinSize(self.GetSize())

        if self.GetSize()[1] > maxFrameHeight:
            self.SetSize((self.GetSize()[0], maxFrameHeight))
        else:
            self.SetSize(self.panel.GetSize())
            
    def GetValues(self, columns=None):
        """Return list of values (casted to string).

        If columns is given (list), return only values of given columns.
        """
        valueList = []
        for labelId, valueId in self.widgets:
            column = self.FindWindowById(labelId).GetLabel().replace(':', '')
            if columns is None or column in columns:
                value = str(self.FindWindowById(valueId).GetValue())
                valueList.append(value)

        # add key value
        if self.box:
            valueList.insert(self.keyId, str(self.cat))
                             
        return valueList

def main(argv=None):
    if argv is None:
        argv = sys.argv

    if len(argv) != 2:
        print >> sys.stderr, __doc__
        sys.exit()

    # Command line arguments of the script to be run are preserved by the
    # hotswap.py wrapper but hotswap.py and its options are removed that
    # sys.argv looks as if no wrapper was present.
    #print "argv:", `argv`

    #some applications might require image handlers
    wx.InitAllImageHandlers()

    app = wx.PySimpleApp()
    f = AttributeManager(parent=None, id=wx.ID_ANY,
                         title="%s - <%s>" % (_("GRASS GIS Attribute Table Manager"),
                                              argv[1]),
                         size=(900,600), vectorName=argv[1])
    f.Show()

    app.MainLoop()

if __name__ == '__main__':
    main()