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

"""!
@package vdigit

@brief Vector digitizer extension

Import:

@code
  from vdigit import VDigit as VDigit
@endcode

Classes:
 - AbstractDigit 
 - VDigit
 - AbstractDisplayDriver
 - CDisplayDriver
 - VDigitSettingsDialog
 - VDigitCategoryDialog
 - VDigitZBulkDialog
 - VDigitDuplicatesDialog
 - VDigitVBuildDialog

(C) 2007-2009 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 Martin Landa <landa.martin gmail.com>
"""

import os
import sys
import string
import copy
import textwrap
import traceback

from threading import Thread

import wx
import wx.lib.colourselect as csel
import wx.lib.mixins.listctrl as listmix

import gcmd
import dbm
from debug import Debug as Debug
import gselect
import globalvar
from units import Units
from preferences import globalSettings as UserSettings
try:
    digitPath = os.path.join(globalvar.ETCWXDIR, "vdigit")
    sys.path.append(digitPath)
    import grass7_wxvdigit as wxvdigit
    GV_LINES = wxvdigit.GV_LINES
    PseudoDC = wxvdigit.PseudoDC
    haveVDigit = True
    errorMsg = ''
except ImportError, err:
    haveVDigit = False
    GV_LINES = None
    PseudoDC = wx.PseudoDC
    errorMsg = err
    print >> sys.stderr, "\nWARNING: Vector digitizer is not available (%s).\n\n" \
        "Note that vector digitizer is currently not working under MS Windows (hopefully will be fixed soon). " \
        "Please try more recent version of GRASS." % err

class AbstractDigit:
    """
    Abstract digitization class
    """
    def __init__(self, mapwindow):
        """!Initialization

        @param mapwindow reference to mapwindow (MapFrame) instance
        @param settings  initial settings of digitization tool
        """
        self.map       = None
        self.mapWindow = mapwindow
        
        Debug.msg (3, "AbstractDigit.__init__(): map=%s" % \
                   self.map)

        #self.SetCategory()

        self.driver = CDisplayDriver(self, mapwindow)

    def __del__(self):
        pass
    
    def SetCategoryNextToUse(self):
        """!Find maximum category number in the map layer
        and update Digit.settings['category']

        @return 'True' on success, 'False' on failure
        """
        # vector map layer without categories, reset to '1'
        UserSettings.Set(group='vdigit', key='category', subkey='value', value=1)

        if self.map:
            cat = self.digit.GetCategory(UserSettings.Get(group='vdigit', key='layer', subkey='value'))
            cat += 1
            UserSettings.Set(group='vdigit', key='category', subkey='value',
                             value=cat)
        
    def SetCategory(self):
        """!Return category number to use (according Settings)"""
        if UserSettings.Get(group='vdigit', key="categoryMode", subkey='selection') == 0:
            self.SetCategoryNextToUse()

        return UserSettings.Get(group='vdigit', key="category", subkey='value')

    def SetMapName(self, map):
        """!Set map name

        @param map map name to be set up or None (will close currently edited map)
        """
        Debug.msg (3, "AbstractDigit.SetMapName map=%s" % map)
        self.map = map

        try:
            ret = self.driver.Reset(self.map)
        except StandardError, e:
            raise gcmd.DigitError(parent=self.mapWindow.parent,
                                  message="%s %s (%s)" % (_("Unable to initialize display driver of vector "
                                                            "digitizer. See 'Command output' for details.\n\n"
                                                            "Details:"), e, errorMsg))
        
        if map and ret == -1:
            raise gcmd.DigitError(parent=self.mapWindow.parent,
                                  message=_('Unable to open vector map <%s> for editing.\n\n'
                                            'Data are probably corrupted, '
                                            'try to run v.build to rebuild '
                                            'the topology (Vector->Develop vector map->'
                                            'Create/rebuild topology).') % map)
        if not map and ret != 0:
            raise gcmd.DigitError(parent=self.mapWindow.parent,
                                  message=_('Unable to open vector map <%s> for editing.\n\n'
                                            'Data are probably corrupted, '
                                            'try to run v.build to rebuild '
                                            'the topology (Vector->Develop vector map->'
                                            'Create/rebuild topology).') % map)

        if self.digit:
            self.digit.InitCats()
        
    def SelectLinesByQueryThresh(self):
        """!Generic method used for SelectLinesByQuery()
        -- to get threshold value"""
        thresh = 0.0
        if UserSettings.Get(group='vdigit', key='query', subkey='selection') == 0:
            thresh = UserSettings.Get(group='vdigit', key='queryLength', subkey='thresh')
            if UserSettings.Get(group='vdigit', key="queryLength", subkey='than-selection') == 0:
                thresh = -1 * thresh
        else:
            thresh = UserSettings.Get(group='vdigit', key='queryDangle', subkey='thresh')
            if UserSettings.Get(group='vdigit', key="queryDangle", subkey='than-selection') == 0:
                thresh = -1 * thresh

        return thresh

    def GetSelectType(self):
        """!Get type(s) to be selected

        Used by SelectLinesByBox() and SelectLinesByPoint()"""

        type = 0
        for feature in (('point', wxvdigit.GV_POINT),
                        ('line', wxvdigit.GV_LINE),
                        ('centroid', wxvdigit.GV_CENTROID),
                        ('boundary', wxvdigit.GV_BOUNDARY)):
            if UserSettings.Get(group='vdigit', key='selectType',
                                subkey=[feature[0], 'enabled']) is True:
                type |= feature[1]

        return type

    def SelectLinesFromBackgroundMap(self, pos1, pos2):
        """!Select features from background map

        @param pos1,pos2 bounding box
        """
        bgmap = str(UserSettings.Get(group='vdigit', key='bgmap', subkey='value',
                                     internal=True))
        
        if bgmap == '':
            Debug.msg(4, "VEdit.SelectLinesFromBackgroundMap(): []")
            return []

        x1, y1 = pos1
        x2, y2 = pos2
        ret = gcmd.RunCommand('v.edit',
                              parent = self,
                              quiet = True,
                              read = True,
                              map = bgmap,
                              tool = 'select',
                              bbox = '%f,%f,%f,%f' % (x1, y1, x2, y2))

        if not ret:
            x, y = pos1
            ret = gcmd.RunCommand('v.edit',
                                  parent = self,
                                  quiet = True,
                                  read = True,
                                  map = bgmap,
                                  tool = 'select',
                                  coords = '%f,%f' % (x, y),
                                  thresh = self.driver.GetThreshold(type='selectThresh'))
        
        if not ret:
            return []
        
        output = ret.splitlines()[0] # first line
        ids = output.split(',') 
        ids = map(int, ids) # str -> int
        
        Debug.msg(4, "VEdit.SelectLinesFromBackgroundMap(): %s" % \
                      ",".join(["%d" % v for v in ids]))
        
        return ids

class VDigit(AbstractDigit):
    """
    Prototype of digitization class based on v.digit reimplementation

    Under development (wxWidgets C/C++ background)
    """
    def __init__(self, mapwindow):
        """!Initialization

        @param mapwindow reference to mapwindow (MapFrame) instance
        @param settings  initial settings of digitization tool
        """
        AbstractDigit.__init__(self, mapwindow)
        
        if not mapwindow.parent.IsStandalone():
            self.log = mapwindow.parent.GetLayerManager().goutput.cmd_stderr
        else:
            self.log = sys.stderr
        
        self.toolbar = mapwindow.parent.toolbars['vdigit']
        
        try:
            self.digit = wxvdigit.Digit(self.driver.GetDevice(),
                                        mapwindow)
        except (ImportError, NameError, TypeError), e:
            # print traceback
            traceback.print_exc(file = self.log)
            self.digit = None
            
        self.UpdateSettings()
        
    def __del__(self):
        del self.digit
        
    def AddPoint (self, map, point, x, y, z=None):
        """!Add new point/centroid

        @param map   map name (unused, for compatability with VEdit)
        @param point feature type (if true point otherwise centroid)
        @param x,y,z coordinates
        """
        if UserSettings.Get(group='vdigit', key="categoryMode", subkey='selection') == 2:
            layer = -1 # -> no category
            cat   = -1
        else:
            layer = UserSettings.Get(group='vdigit', key="layer", subkey='value')
            cat   = self.SetCategory()
            
        if point:
            type = wxvdigit.GV_POINT 
        else:
            type = wxvdigit.GV_CENTROID 

        snap, thresh = self.__getSnapThreshold()

        bgmap = str(UserSettings.Get(group='vdigit', key="bgmap",
                                     subkey='value', internal=True))
        if z:
            ret = self.digit.AddLine(type, [x, y, z], layer, cat,
                                     bgmap, snap, thresh)
        else:
            ret = self.digit.AddLine(type, [x, y], layer, cat,
                                     bgmap, snap, thresh)
        self.toolbar.EnableUndo()

        return ret
        
    def AddLine (self, map, line, coords):
        """!Add line/boundary

        @param map    map name (unused, for compatability with VEdit)
        @param line   feature type (if True line, otherwise boundary)
        @param coords list of coordinates
        """
        if len(coords) < 2:
            return
        
        if UserSettings.Get(group='vdigit', key="categoryMode", subkey='selection') == 2:
            layer = -1 # -> no category
            cat   = -1
        else:
            layer = UserSettings.Get(group='vdigit', key="layer", subkey='value')
            cat   = self.SetCategory()
        
        if line:
            type = wxvdigit.GV_LINE
        else:
            type = wxvdigit.GV_BOUNDARY
        
        listCoords = []
        for c in coords:
            for x in c:
                listCoords.append(x)
        
        snap, thresh = self.__getSnapThreshold()
        
        bgmap = str(UserSettings.Get(group='vdigit', key="bgmap",
                                     subkey='value', internal=True))
        
        ret = self.digit.AddLine(type, listCoords, layer, cat,
                                 bgmap, snap, thresh)

        self.toolbar.EnableUndo()
        
        return ret
    
    def DeleteSelectedLines(self):
        """!Delete selected features

        @return number of deleted lines
        """
        nlines = self.digit.DeleteLines(UserSettings.Get(group='vdigit', key='delRecord', subkey='enabled'))
        
        if nlines > 0:
            self.toolbar.EnableUndo()
            
        return nlines

    def MoveSelectedLines(self, move):
        """!Move selected features

        @param move direction (x, y)
        """
        snap, thresh = self.__getSnapThreshold()
        
        bgmap = str(UserSettings.Get(group='vdigit', key="bgmap",
                                     subkey='value', internal=True))
        
        try:
            nlines = self.digit.MoveLines(move[0], move[1], 0.0, # TODO 3D
                                          bgmap, snap, thresh)
        except SystemExit:
            pass
        
        if nlines > 0:
            self.toolbar.EnableUndo()
        
        return nlines

    def MoveSelectedVertex(self, coords, move):
        """!Move selected vertex of the line

        @param coords click coordinates
        @param move   X,Y direction

        @return id of new feature
        @return 0 vertex not moved (not found, line is not selected)
        """
        snap, thresh = self.__getSnapThreshold()

        bgmap = str(UserSettings.Get(group='vdigit', key="bgmap",
                                     subkey='value', internal=True))
        
        moved = self.digit.MoveVertex(coords[0], coords[1], 0.0, # TODO 3D
                                      move[0], move[1], 0.0,
                                      bgmap, snap,
                                      self.driver.GetThreshold(type='selectThresh'), thresh)

        if moved:
            self.toolbar.EnableUndo()

        return moved

    def AddVertex(self, coords):
        """!Add new vertex to the selected line/boundary on position 'coords'

        @param coords coordinates to add vertex

        @return id of new feature
        @return 0 nothing changed
        @return -1 on failure
        """
        added = self.digit.ModifyLineVertex(1, coords[0], coords[1], 0.0, # TODO 3D
                                            self.driver.GetThreshold(type='selectThresh'))

        if added > 0:
            self.toolbar.EnableUndo()

        return added

    def RemoveVertex(self, coords):
        """!Remove vertex from the selected line/boundary on position 'coords'

        @param coords coordinates to remove vertex

        @return id of new feature
        @return 0 nothing changed
        @return -1 on failure
        """
        deleted = self.digit.ModifyLineVertex(0, coords[0], coords[1], 0.0, # TODO 3D
                                              self.driver.GetThreshold(type='selectThresh'))

        if deleted > 0:
            self.toolbar.EnableUndo()

        return deleted


    def SplitLine(self, coords):
        """!Split selected line/boundary on position 'coords'

        @param coords coordinates to split line

        @return 1 line modified
        @return 0 nothing changed
        @return -1 error
        """
        ret = self.digit.SplitLine(coords[0], coords[1], 0.0, # TODO 3D
                                   self.driver.GetThreshold('selectThresh'))

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def EditLine(self, line, coords):
        """!Edit existing line/boundary

        @param line id of line to be modified
        @param coords list of coordinates of modified line

        @return feature id of new line
        @return -1 on error
        """
        try:
            lineid = line[0]
        except:
            lineid = -1

        if len(coords) < 2:
            self.DeleteSelectedLines()
            return 0
            
        listCoords = []
        for c in coords:
            for x in c:
                listCoords.append(x)

        snap, thresh = self.__getSnapThreshold()
        
        bgmap = str(UserSettings.Get(group='vdigit', key="bgmap",
                                     subkey='value', internal=True))
        
        try:
            ret = self.digit.RewriteLine(lineid, listCoords,
                                         bgmap, snap, thresh)
        except SystemExit:
            pass

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def FlipLine(self):
        """!Flip selected lines/boundaries

        @return number of modified lines
        @return -1 on error
        """
        ret = self.digit.FlipLines()

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def MergeLine(self):
        """!Merge selected lines/boundaries

        @return number of modified lines
        @return -1 on error
        """
        ret = self.digit.MergeLines()

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def BreakLine(self):
        """!Break selected lines/boundaries

        @return number of modified lines
        @return -1 on error
        """
        ret = self.digit.BreakLines()

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def SnapLine(self):
        """!Snap selected lines/boundaries

        @return on success
        @return -1 on error
        """
        snap, thresh = self.__getSnapThreshold()
        ret = self.digit.SnapLines(thresh)
        
        if ret == 0:
            self.toolbar.EnableUndo()

        return ret

    def ConnectLine(self):
        """!Connect selected lines/boundaries

        @return 1 lines connected
        @return 0 lines not connected
        @return -1 on error
        """
        snap, thresh = self.__getSnapThreshold()
        ret = self.digit.ConnectLines(thresh)

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret
        
    def CopyLine(self, ids=[]):
        """!Copy features from (background) vector map

        @param ids list of line ids to be copied

        @return number of copied features
        @return -1 on error
        """
        bgmap = str(UserSettings.Get(group='vdigit', key='bgmap',
                                     subkey='value', internal=True))
        
        if len(bgmap) > 0:
            ret = self.digit.CopyLines(ids, bgmap)
        else:
            ret = self.digit.CopyLines(ids, None)

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def CopyCats(self, fromId, toId, copyAttrb=False):
        """!Copy given categories to objects with id listed in ids

        @param cats ids of 'from' feature
        @param ids  ids of 'to' feature(s)

        @return number of modified features
        @return -1 on error
        """
        if len(fromId) == 0 or len(toId) == 0:
            return 0
        
        ret = self.digit.CopyCats(fromId, toId, copyAttrb)

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def SelectLinesByQuery(self, pos1, pos2):
        """!Select features by query

        @param pos1, pos2 bounding box definition
        """
        thresh = self.SelectLinesByQueryThresh()
        
        w, n = pos1
        e, s = pos2

        query = wxvdigit.QUERY_UNKNOWN
        if UserSettings.Get(group='vdigit', key='query', subkey='selection') == 0:
            query = wxvdigit.QUERY_LENGTH
        else:
            query = wxvdigit.QUERY_DANGLE

        type = wxvdigit.GV_POINTS | wxvdigit.GV_LINES # TODO: 3D
        
        ids = self.digit.SelectLinesByQuery(w, n, 0.0, e, s, 1000.0,
                                            UserSettings.Get(group='vdigit', key='query', subkey='box'),
                                            query, type, thresh)

        Debug.msg(4, "VDigit.SelectLinesByQuery(): %s" % \
                      ",".join(["%d" % v for v in ids]))
        
        return ids

    def GetLineCats(self, line=-1):
        """!Get layer/category pairs from given (selected) line
        
        @param line feature id (-1 for first selected line)
        """
        return dict(self.digit.GetLineCats(line))

    def GetLineLength(self, line):
        """!Get line length

        @param line feature id

        @return line length
        @return -1 on error
        """
        return self.digit.GetLineLength(line)

    def GetAreaSize(self, centroid):
        """!Get area size

        @param centroid centroid id

        @return area size
        @return -1 on error
        """
        return self.digit.GetAreaSize(centroid)
        
    def GetAreaPerimeter(self, centroid):
        """!Get area perimeter

        @param centroid centroid id

        @return area size
        @return -1 on error
        """
        return self.digit.GetAreaPerimeter(centroid)

    def SetLineCats(self, line, layer, cats, add=True):
        """!Set categories for given line and layer

        @param line feature id
        @param layer layer number (-1 for first selected line)
        @param cats list of categories
        @param add if True to add, otherwise do delete categories

        @return new feature id (feature need to be rewritten)
        @return -1 on error
        """
        ret = self.digit.SetLineCats(line, layer, cats, add)

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def GetLayers(self):
        """!Get list of layers"""
        return self.digit.GetLayers()

    def TypeConvForSelectedLines(self):
        """!Feature type conversion for selected objects.

        Supported conversions:
         - point <-> centroid
         - line <-> boundary

        @return number of modified features
        @return -1 on error
        """
        ret = self.digit.TypeConvLines()

        if ret > 0:
            self.toolbar.EnableUndo()

        return ret

    def Undo(self, level=-1):
        """!Undo action

        @param level levels to undo (0 to revert all)

        @return id of current changeset
        """
        try:
            ret = self.digit.Undo(level)
        except SystemExit:
            ret = -2

        if ret == -2:
            raise gcmd.DigitError, _("Undo failed, data corrupted.")

        self.mapWindow.UpdateMap(render=False)
        
        if ret < 0: # disable undo tool
            self.toolbar.EnableUndo(False)

    def GetUndoLevel(self):
        """!Get undo level (number of active changesets)"""
        if not self.digit:
            return -1
        
        return self.digit.GetUndoLevel()

    def UpdateSettings(self):
        """!Update digit settigs"""
        if not self.digit:
            return
        
        self.digit.UpdateSettings(UserSettings.Get(group='vdigit', key='breakLines',
                                                   subkey='enabled'),
                                  UserSettings.Get(group='vdigit', key='addCentroid',
                                                   subkey='enabled'),
                                  UserSettings.Get(group='vdigit', key='catBoundary',
                                                   subkey='enabled'))
        
    def ZBulkLines(self, pos1, pos2, start, step):
        """!Z-bulk labeling

        @param pos1 reference line (start point)
        @param pos1 reference line (end point)
        @param start starting value
        @param step step value

        @return number of modified lines
        @return -1 on error
        """
        ret = self.digit.ZBulkLabeling(pos1[0], pos1[1], pos2[0], pos2[1],
                                       start, step)
        
        if ret > 0:
            self.toolbar.EnableUndo()
        
        return ret
    
    def __getSnapThreshold(self):
        """!Get snap mode and threshold value

        @return (snap, thresh)
        """
        thresh = self.driver.GetThreshold()

        if thresh > 0.0:
            if UserSettings.Get(group='vdigit', key='snapToVertex', subkey='enabled') is True:
                snap = wxvdigit.SNAPVERTEX
            else:
                snap = wxvdigit.SNAP
        else:
            snap = wxvdigit.NO_SNAP

        return (snap, thresh)

class Digit(VDigit):
    """!Default digit class"""
    def __init__(self, mapwindow):
        VDigit.__init__(self, mapwindow)
        self.type = 'vdigit'
        
    def __del__(self):
        VDigit.__del__(self)
        
class AbstractDisplayDriver:
    """!Abstract classs for display driver"""
    def __init__(self, parent, mapwindow):
        """!Initialization

        @param parent
        @param mapwindow reference to mapwindow (MFrame)
        """
        self.parent      = parent
        self.mapwindow   = mapwindow
        
        self.ids         = {}   # dict[g6id] = [pdcId]
        self.selected    = []   # list of selected objects (grassId!)

    def GetThreshold(self, type='snapping', value=None, units=None):
        """!Return threshold in map units

        @param value threshold to be set up
        @param units units (map, screen)
        """
        if value is None:
            value = UserSettings.Get(group='vdigit', key=type, subkey='value')

        if units is None:
            units = UserSettings.Get(group='vdigit', key=type, subkey='units')

        reg = self.mapwindow.Map.region
        if value < 0:
            value = (reg['nsres'] + reg['ewres']) / 2.
        
        if units == "screen pixels":
            # pixel -> cell
            if reg['nsres'] > reg['ewres']:
                res = reg['nsres']
            else:
                res = reg['ewres']

            threshold = value * res
        else:
            threshold = value

        Debug.msg(4, "AbstractDisplayDriver.GetThreshold(): type=%s, thresh=%f" % (type, threshold))
        
        return threshold

class CDisplayDriver(AbstractDisplayDriver):
    """
    Display driver using grass7_wxdriver module
    """
    def __init__(self, parent, mapwindow):
        """!Initialization

        @param parent
        @param mapwindow reference to mapwindow (MFrame)
        """
        AbstractDisplayDriver.__init__(self, parent, mapwindow)

        self.mapWindow = mapwindow

        if not self.mapwindow.parent.IsStandalone():
            logerr = self.mapwindow.parent.GetLayerManager().goutput.cmd_stderr
        else:
            logerr = None

        # initialize wx display driver
        try:
            self.__display = wxvdigit.DisplayDriver(mapwindow.pdcVector,
                                                    mapwindow.pdcTmp,
                                                    logerr)
        except:
            self.__display = None
            
        self.UpdateSettings()

    def GetDevice(self):
        """!Get device"""
        return self.__display
    
    def SetDevice(self, pdc):
        """!Set device for driver

        @param pdc wx.PseudoDC instance
        """
        if self.__display:
            self.__display.SetDevice(pdc)
            
    def Reset(self, map):
        """!Reset map

        Open or close the vector map by driver.

        @param map map name or None to close the map

        @return 0 on success (close map)
        @return topo level on success (open map)
        @return non-zero (close map)
        @return -1 on error (open map)
        """
        if map:
            name, mapset = map.split('@')
            try:
                ret = self.__display.OpenMap(str(name), str(mapset), True)
            except SystemExit:
                ret = -1
        else:
            ret = self.__display.CloseMap()

        return ret
    
    def ReloadMap(self):
        """!Reload map (close and re-open).

        Needed for v.edit, TODO: get rid of that..."""
        
        Debug.msg(4, "CDisplayDriver.ReloadMap():")
        self.__display.ReloadMap()

    def DrawMap(self):
        """!Draw vector map layer content

        @return wx.Image instance
        """
        if not self.__display:
            return 0
        
        nlines = self.__display.DrawMap(True) # force
        Debug.msg(3, "CDisplayDriver.DrawMap(): nlines=%d" % nlines)

        return nlines

    def SelectLinesByBox(self, begin, end, type=0, drawSeg=False):
        """!Select vector features by given bounding box.

        If type is given, only vector features of given type are selected.

        @param begin,end bounding box definition
        @param type      select only objects of given type
        """
        x1, y1 = begin
        x2, y2 = end

        inBox = UserSettings.Get(group='vdigit', key='selectInside', subkey='enabled')
        
        nselected = self.__display.SelectLinesByBox(x1, y1, -1.0 * wxvdigit.PORT_DOUBLE_MAX,
                                                    x2, y2, wxvdigit.PORT_DOUBLE_MAX,
                                                    type, inBox, drawSeg)
        
        Debug.msg(4, "CDisplayDriver.SelectLinesByBox(): selected=%d" % \
                      nselected)
        
        return nselected

    def SelectLineByPoint(self, point, type=0):
        """!Select vector feature by coordinates of click point (in given threshold).

        If type is given, only vector features of given type are selected.

        @param point click coordinates (bounding box given by threshold)
        @param type  select only objects of given type
        """
        pointOnLine = self.__display.SelectLineByPoint(point[0], point[1], 0.0,
                                                       self.GetThreshold(type='selectThresh'),
                                                       type, 0); # without_z

        if len(pointOnLine) > 0:
            Debug.msg(4, "CDisplayDriver.SelectLineByPoint(): pointOnLine=%f,%f" % \
                          (pointOnLine[0], pointOnLine[1]))
            return pointOnLine
        else:
            Debug.msg(4, "CDisplayDriver.SelectLineByPoint(): no line found")
            return None
        
    def GetSelected(self, grassId=True):
        """!Return ids of selected vector features
        
        @param grassId if grassId is True returns GRASS ids, otherwise
        internal ids of objects drawn in PseudoDC"""
        if not self.__display:
            return list()
        
        if grassId:
            selected = self.__display.GetSelected(True)
        else:
            selected = self.__display.GetSelected(False)
            
        Debug.msg(4, "CDisplayDriver.GetSelected(): grassId=%d, ids=%s" % \
                      (grassId, (",".join(["%d" % v for v in selected]))))
            
        return selected

    def GetSelectedCoord(self):
        """!Return ids of selected vector features and their coordinates"""
        return dict(self.__display.GetSelectedCoord())
        
    def GetRegionSelected(self):
        """!Get minimal region extent of selected features (ids/cats)"""
        return self.__display.GetRegionSelected()
    
    def GetDuplicates(self):
        """!Return ids of (selected) duplicated vector features
        """
        # -> id : (list of ids)
        dupl = dict(self.__display.GetDuplicates())

        # -> id : ((id, cat), ...)
        dupl_full = {}
        for key in dupl.keys():
            dupl_full[key] = []
            for id in dupl[key]:
                catStr = ''
                
                cats = self.parent.GetLineCats(line=id)
                
                for layer in cats.keys():
                    if len(cats[layer]) > 0:
                        catStr = "%d: (" % layer
                        for cat in cats[layer]:
                            catStr += "%d," % cat
                        catStr = catStr.rstrip(',')
                        catStr += ')'
                
                dupl_full[key].append([id, catStr])

        return dupl_full

    def GetSelectedVertex(self, coords):
        """!Get PseudoDC id(s) of vertex (of selected line)
        on position 'coords'

        @param coords click position
        """
        x, y = coords

        id = self.__display.GetSelectedVertex(x, y, self.GetThreshold(type='selectThresh'))

        Debug.msg(4, "CDisplayDriver.GetSelectedVertex(): id=%s" % \
                      (",".join(["%d" % v for v in id])))

        return id 

    def SetSelected(self, id, field=-1):
        """!Set selected vector features

        @param id list of feature ids/categories to be selected
        @param field field(layer) number, -1 for ids instead of cats
        """
        Debug.msg(4, "CDisplayDriver.SetSelected(): id=%s" % \
                      id)

        self.__display.SetSelected(id, field)

    def UnSelect(self, id):
        """!Unselect vector features

        @param id list of feature id(s)
        """

        Debug.msg(4, "CDisplayDriver.UnSelect(): id=%s" % \
                      ",".join(["%d" % v for v in id]))
        
        self.__display.UnSelect(id)

    def UpdateRegion(self):
        """!Set geographical region
        
        Needed for 'cell2pixel' conversion"""
        if not self.__display:
            return
        
        map = self.mapwindow.Map
        reg = map.region
        
        self.__display.SetRegion(reg['n'],
                                 reg['s'],
                                 reg['e'],
                                 reg['w'],
                                 reg['nsres'],
                                 reg['ewres'],
                                 reg['center_easting'],
                                 reg['center_northing'],
                                 map.width, map.height)

    def GetMapBoundingBox(self):
        """!Return bounding box of given vector map layer

        @return (w,s,b,e,n,t)
        """

        return self.__display.GetMapBoundingBox()

    def Is3D(self):
        """!Check if open vector map is 3D

        @return True if 3D
        @return False if not 3D"""
        return self.__display.Is3D()
    
    def DrawSelected(self, draw=True):
        """!Show/hide selected features"""
        self.__display.DrawSelected(draw)
        
    def UpdateSettings(self, alpha=255):
        """!Update display driver settings"""
        # TODO map units

        if not self.__display:
            return
        
        color = {}
        for symbol in ("highlight",
                       "highlightDupl",
                       "point",
                       "line",
                       "boundaryNo",
                       "boundaryOne",
                       "boundaryTwo",
                       "centroidIn",
                       "centroidOut",
                       "centroidDup",
                       "nodeOne",
                       "nodeTwo",
                       "vertex",
                       "area",
                       "direction"):
            color[symbol] = wx.Color(UserSettings.Get(group='vdigit', key='symbol',
                                                      subkey=[symbol, 'color'])[0],
                                     UserSettings.Get(group='vdigit', key='symbol',
                                                      subkey=[symbol, 'color'])[1],
                                     UserSettings.Get(group='vdigit', key='symbol',
                                                      subkey=[symbol, 'color'])[2]).GetRGB()

        self.__display.UpdateSettings (color['highlight'],
                                       UserSettings.Get(group='vdigit', key='checkForDupl',
                                                        subkey='enabled'),
                                       color['highlightDupl'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['point', 'enabled']),
                                       color['point'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['line', 'enabled']),
                                       color['line'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['boundaryNo', 'enabled']),
                                       color['boundaryNo'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['boundaryOne', 'enabled']),
                                       color['boundaryOne'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['boundaryTwo', 'enabled']),
                                       color['boundaryTwo'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['centroidIn', 'enabled']),
                                       color['centroidIn'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['centroidOut', 'enabled']),
                                       color['centroidOut'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['centroidDup', 'enabled']),
                                       color['centroidDup'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['nodeOne', 'enabled']),
                                       color['nodeOne'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['nodeTwo', 'enabled']),
                                       color['nodeTwo'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['vertex', 'enabled']),
                                       color['vertex'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['area', 'enabled']),
                                       color['area'],
                                       UserSettings.Get(group='vdigit', key='symbol',
                                                        subkey=['direction', 'enabled']),
                                       color['direction'],
                                       UserSettings.Get(group='vdigit', key='lineWidth',
                                                        subkey='value'),
                                       alpha)

class VDigitSettingsDialog(wx.Dialog):
    """
    Standard settings dialog for digitization purposes
    """
    def __init__(self, parent, title, style=wx.DEFAULT_DIALOG_STYLE):
        wx.Dialog.__init__(self, parent=parent, id=wx.ID_ANY, title=title, style=style)

        self.parent = parent # mapdisplay.BufferedWindow class instance

        # notebook
        notebook = wx.Notebook(parent=self, id=wx.ID_ANY, style=wx.BK_DEFAULT)
        self.__CreateSymbologyPage(notebook)
        parent.digit.SetCategory() # update category number (next to use)
        self.__CreateGeneralPage(notebook)
        self.__CreateAttributesPage(notebook)
        self.__CreateQueryPage(notebook)

        # buttons
        btnApply = wx.Button(self, wx.ID_APPLY)
        btnCancel = wx.Button(self, wx.ID_CANCEL)
        btnSave = wx.Button(self, wx.ID_SAVE)
        btnSave.SetDefault()

        # bindigs
        btnApply.Bind(wx.EVT_BUTTON, self.OnApply)
        btnApply.SetToolTipString(_("Apply changes for this session"))
        btnApply.SetDefault()
        btnSave.Bind(wx.EVT_BUTTON, self.OnSave)
        btnSave.SetToolTipString(_("Close dialog and save changes to user settings file"))
        btnCancel.Bind(wx.EVT_BUTTON, self.OnCancel)
        btnCancel.SetToolTipString(_("Close dialog and ignore changes"))
        
        # sizers
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(btnCancel)
        btnSizer.AddButton(btnApply)
        btnSizer.AddButton(btnSave)
        btnSizer.Realize()
        
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(item=notebook, proportion=1, flag=wx.EXPAND | wx.ALL, border=5)
        mainSizer.Add(item=btnSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)
        
        self.Bind(wx.EVT_CLOSE, self.OnCancel)
        
        self.SetSizer(mainSizer)
        mainSizer.Fit(self)

    def __CreateSymbologyPage(self, notebook):
        """!Create notebook page concerning with symbology settings"""

        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Symbology"))

        sizer = wx.BoxSizer(wx.VERTICAL)
        
        flexSizer = wx.FlexGridSizer (cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)

        self.symbology = {}
        for label, key in self.__SymbologyData():
            textLabel = wx.StaticText(panel, wx.ID_ANY, label)
            color = csel.ColourSelect(panel, id=wx.ID_ANY,
                                      colour=UserSettings.Get(group='vdigit', key='symbol',
                                                              subkey=[key, 'color']), size=(25, 25))
            isEnabled = UserSettings.Get(group='vdigit', key='symbol',
                                         subkey=[key, 'enabled'])
            if isEnabled is not None:
                enabled = wx.CheckBox(panel, id=wx.ID_ANY, label="")
                enabled.SetValue(isEnabled)
                self.symbology[key] = (enabled, color)
            else:
                enabled = (1, 1)
                self.symbology[key] = (None, color)
            
            flexSizer.Add(textLabel, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
            flexSizer.Add(enabled, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
            flexSizer.Add(color, proportion=0, flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE)
            color.SetName("GetColour")
        
        sizer.Add(item=flexSizer, proportion=1, flag=wx.ALL | wx.EXPAND, border=10)
        
        panel.SetSizer(sizer)
        
        return panel

    def __CreateGeneralPage(self, notebook):
        """!Create notebook page concerning with symbology settings"""

        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("General"))

        border = wx.BoxSizer(wx.VERTICAL)
        
        #
        # display section
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Display"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        flexSizer = wx.FlexGridSizer (cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        # line width
        text = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Line width"))
        self.lineWidthValue = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(75, -1),
                                          initial=UserSettings.Get(group='vdigit', key="lineWidth", subkey='value'),
                                          min=1, max=1e6)
        units = wx.StaticText(parent=panel, id=wx.ID_ANY, size=(115, -1),
                              label=UserSettings.Get(group='vdigit', key="lineWidth", subkey='units'),
                              style=wx.ALIGN_LEFT)
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.lineWidthValue, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(units, proportion=0, flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL | wx.LEFT,
                      border=10)

        sizer.Add(item=flexSizer, proportion=1, flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(item=sizer, proportion=0, flag=wx.ALL | wx.EXPAND, border=5)

        #
        # snapping section
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Snapping"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        flexSizer = wx.FlexGridSizer (cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)

        # snapping
        text = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Snapping threshold"))
        self.snappingValue = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(75, -1),
                                         initial=UserSettings.Get(group='vdigit', key="snapping", subkey='value'),
                                         min=-1, max=1e6)
        self.snappingValue.Bind(wx.EVT_SPINCTRL, self.OnChangeSnappingValue)
        self.snappingValue.Bind(wx.EVT_TEXT, self.OnChangeSnappingValue)
        self.snappingUnit = wx.Choice(parent=panel, id=wx.ID_ANY, size=(125, -1),
                                      choices=["screen pixels", "map units"])
        self.snappingUnit.SetStringSelection(UserSettings.Get(group='vdigit', key="snapping", subkey='units'))
        self.snappingUnit.Bind(wx.EVT_CHOICE, self.OnChangeSnappingUnits)
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.snappingValue, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(self.snappingUnit, proportion=0, flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE)

        vertexSizer = wx.BoxSizer(wx.VERTICAL)
        self.snapVertex = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                      label=_("Snap also to vertex"))
        self.snapVertex.SetValue(UserSettings.Get(group='vdigit', key="snapToVertex", subkey='enabled'))
        vertexSizer.Add(item=self.snapVertex, proportion=0, flag=wx.EXPAND)
        self.mapUnits = self.parent.MapWindow.Map.ProjInfo()['units']
        self.snappingInfo = wx.StaticText(parent=panel, id=wx.ID_ANY,
                                          label=_("Snapping threshold is %(value).1f %(units)s") % \
                                              {'value' : self.parent.digit.driver.GetThreshold(),
                                               'units' : self.mapUnits})
        vertexSizer.Add(item=self.snappingInfo, proportion=0,
                        flag=wx.ALL | wx.EXPAND, border=1)

        sizer.Add(item=flexSizer, proportion=1, flag=wx.EXPAND)
        sizer.Add(item=vertexSizer, proportion=1, flag=wx.EXPAND)
        border.Add(item=sizer, proportion=0, flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border=5)

        #
        # select box
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Select vector features"))
        # feature type
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        inSizer = wx.BoxSizer(wx.HORIZONTAL)
        self.selectFeature = {}
        for feature in ('point', 'line',
                        'centroid', 'boundary'):
            chkbox = wx.CheckBox(parent=panel, label=feature)
            self.selectFeature[feature] = chkbox.GetId()
            chkbox.SetValue(UserSettings.Get(group='vdigit', key='selectType',
                                             subkey=[feature, 'enabled']))
            inSizer.Add(item=chkbox, proportion=0,
                        flag=wx.EXPAND | wx.ALL, border=5)
        sizer.Add(item=inSizer, proportion=0, flag=wx.EXPAND)
        # threshold
        flexSizer = wx.FlexGridSizer (cols=3, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        text = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Select threshold"))
        self.selectThreshValue = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(75, -1),
                                             initial=UserSettings.Get(group='vdigit', key="selectThresh", subkey='value'),
                                             min=1, max=1e6)
        units = wx.StaticText(parent=panel, id=wx.ID_ANY, size=(115, -1),
                              label=UserSettings.Get(group='vdigit', key="lineWidth", subkey='units'),
                              style=wx.ALIGN_LEFT)
        flexSizer.Add(text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.selectThreshValue, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(units, proportion=0, flag=wx.ALIGN_RIGHT | wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL | wx.LEFT,
                      border=10)

        self.selectIn = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                    label=_("Select only features inside of selection bounding box"))
        self.selectIn.SetValue(UserSettings.Get(group='vdigit', key="selectInside", subkey='enabled'))
        self.selectIn.SetToolTipString(_("By default are selected all features overlapping selection bounding box "))
        
        self.checkForDupl = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                        label=_("Check for duplicates"))
        self.checkForDupl.SetValue(UserSettings.Get(group='vdigit', key="checkForDupl", subkey='enabled'))


        sizer.Add(item=flexSizer, proportion=0, flag=wx.EXPAND)
        sizer.Add(item=self.selectIn, proportion=0, flag=wx.EXPAND | wx.ALL, border=1)
        sizer.Add(item=self.checkForDupl, proportion=0, flag=wx.EXPAND | wx.ALL, border=1)        
        border.Add(item=sizer, proportion=0, flag=wx.EXPAND | wx.LEFT | wx.RIGHT | wx.BOTTOM, border=5)

        #
        # digitize lines box
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Digitize line features"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        self.intersect = wx.CheckBox(parent=panel, label=_("Break lines at intersection"))
        self.intersect.SetValue(UserSettings.Get(group='vdigit', key='breakLines', subkey='enabled'))
        
        sizer.Add(item=self.intersect, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)

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

        #
        # save-on-exit box
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Save changes"))
        # save changes on exit?
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        self.save = wx.CheckBox(parent=panel, label=_("Save changes on exit"))
        self.save.SetValue(UserSettings.Get(group='vdigit', key='saveOnExit', subkey='enabled'))
        sizer.Add(item=self.save, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(item=sizer, proportion=0, flag=wx.EXPAND | wx.LEFT | wx.RIGHT | wx.BOTTOM, border=5)

        panel.SetSizer(border)
        
        return panel

    def __CreateQueryPage(self, notebook):
        """!Create notebook page for query tool"""

        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Query tool"))

        border = wx.BoxSizer(wx.VERTICAL)

        #
        # query tool box
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Choose query tool"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        LocUnits = self.parent.MapWindow.Map.ProjInfo()['units']

        self.queryBox = wx.CheckBox(parent=panel, id=wx.ID_ANY, label=_("Select by box"))
        self.queryBox.SetValue(UserSettings.Get(group='vdigit', key="query", subkey='box'))

        sizer.Add(item=self.queryBox, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        sizer.Add((0, 5))

        #
        # length
        #
        self.queryLength = wx.RadioButton(parent=panel, id=wx.ID_ANY, label=_("length"))
        self.queryLength.Bind(wx.EVT_RADIOBUTTON, self.OnChangeQuery)
        sizer.Add(item=self.queryLength, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        flexSizer = wx.FlexGridSizer (cols=4, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        txt = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Select lines"))
        self.queryLengthSL = wx.Choice (parent=panel, id=wx.ID_ANY, 
                                        choices = [_("shorter than"), _("longer than")])
        self.queryLengthSL.SetSelection(UserSettings.Get(group='vdigit', key="queryLength", subkey='than-selection'))
        self.queryLengthValue = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(100, -1),
                                            initial=1,
                                            min=0, max=1e6)
        self.queryLengthValue.SetValue(UserSettings.Get(group='vdigit', key="queryLength", subkey='thresh'))
        units = wx.StaticText(parent=panel, id=wx.ID_ANY, label="%s" % LocUnits)
        flexSizer.Add(txt, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.queryLengthSL, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(self.queryLengthValue, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(units, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        sizer.Add(item=flexSizer, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)

        #
        # dangle
        #
        self.queryDangle = wx.RadioButton(parent=panel, id=wx.ID_ANY, label=_("dangle"))
        self.queryDangle.Bind(wx.EVT_RADIOBUTTON, self.OnChangeQuery)
        sizer.Add(item=self.queryDangle, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        flexSizer = wx.FlexGridSizer (cols=4, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)
        txt = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Select dangles"))
        self.queryDangleSL = wx.Choice (parent=panel, id=wx.ID_ANY, 
                                        choices = [_("shorter than"), _("longer than")])
        self.queryDangleSL.SetSelection(UserSettings.Get(group='vdigit', key="queryDangle", subkey='than-selection'))
        self.queryDangleValue = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(100, -1),
                                       initial=1,
                                       min=0, max=1e6)
        self.queryDangleValue.SetValue(UserSettings.Get(group='vdigit', key="queryDangle", subkey='thresh'))
        units = wx.StaticText(parent=panel, id=wx.ID_ANY, label="%s" % LocUnits)
        flexSizer.Add(txt, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.queryDangleSL, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(self.queryDangleValue, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)
        flexSizer.Add(units, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        sizer.Add(item=flexSizer, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)

        if UserSettings.Get(group='vdigit', key="query", subkey='selection') == 0:
            self.queryLength.SetValue(True)
        else:
            self.queryDangle.SetValue(True)

        # enable & disable items
        self.OnChangeQuery(None)

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

        panel.SetSizer(border)
        
        return panel

    def __CreateAttributesPage(self, notebook):
        """!Create notebook page for query tool"""

        panel = wx.Panel(parent=notebook, id=wx.ID_ANY)
        notebook.AddPage(page=panel, text=_("Attributes"))

        border = wx.BoxSizer(wx.VERTICAL)

        #
        # add new record
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Digitize new feature"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)

        # checkbox
        self.addRecord = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                     label=_("Add new record into table"))
        self.addRecord.SetValue(UserSettings.Get(group='vdigit', key="addRecord", subkey='enabled'))
        sizer.Add(item=self.addRecord, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        # settings
        flexSizer = wx.FlexGridSizer(cols=2, hgap=3, vgap=3)
        flexSizer.AddGrowableCol(0)
        settings = ((_("Layer"), 1), (_("Category"), 1), (_("Mode"), _("Next to use")))
        # layer
        text = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Layer"))
        self.layer = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(125, -1),
                                 min = 1, max = 1e3)
        self.layer.SetValue(int(UserSettings.Get(group='vdigit', key="layer", subkey='value')))
        flexSizer.Add(item=text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(item=self.layer, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
        # category number
        text = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Category number"))
        self.category = wx.SpinCtrl(parent=panel, id=wx.ID_ANY, size=(125, -1),
                                    initial=UserSettings.Get(group='vdigit', key="category", subkey='value'),
                                    min=-1e9, max=1e9) 
        if UserSettings.Get(group='vdigit', key="categoryMode", subkey='selection') != 1:
            self.category.Enable(False)
        flexSizer.Add(item=text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(item=self.category, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
        # category mode
        text = wx.StaticText(parent=panel, id=wx.ID_ANY, label=_("Category mode"))
        self.categoryMode = wx.Choice(parent=panel, id=wx.ID_ANY, size=(125, -1),
                                      choices=[_("Next to use"), _("Manual entry"), _("No category")])
        self.categoryMode.SetSelection(UserSettings.Get(group='vdigit', key="categoryMode", subkey='selection'))
        flexSizer.Add(item=text, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(item=self.categoryMode, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)

        sizer.Add(item=flexSizer, proportion=1, flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(item=sizer, proportion=0,
                   flag=wx.ALL | wx.EXPAND, border=5)

        #
        # digitize new area
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Digitize new area"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        
        # add centroid
        self.addCentroid = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                       label=_("Add centroid to left/right area"))
        self.addCentroid.SetValue(UserSettings.Get(group='vdigit', key="addCentroid", subkey='enabled'))
        sizer.Add(item=self.addCentroid, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        
        # attach category to boundary
        self.catBoundary = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                       label=_("Do not attach category to boundaries"))
        self.catBoundary.SetValue(UserSettings.Get(group='vdigit', key="catBoundary", subkey='enabled'))
        sizer.Add(item=self.catBoundary, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(item=sizer, proportion=0,
                   flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border=5)
        
        #
        # delete existing record
        #
        box   = wx.StaticBox (parent=panel, id=wx.ID_ANY, label=" %s " % _("Delete existing feature(s)"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        
        # checkbox
        self.deleteRecord = wx.CheckBox(parent=panel, id=wx.ID_ANY,
                                        label=_("Delete record from table"))
        self.deleteRecord.SetValue(UserSettings.Get(group='vdigit', key="delRecord", subkey='enabled'))
        sizer.Add(item=self.deleteRecord, proportion=0, flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(item=sizer, proportion=0,
                   flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border=5)

        #
        # geometry attributes (currently only length and area are supported)
        #
        box   = wx.StaticBox (parent = panel, id = wx.ID_ANY,
                              label = " %s " % _("Geometry attributes"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        gridSizer = wx.GridBagSizer(hgap=3, vgap=3)
        gridSizer.AddGrowableCol(0)
        self.geomAttrb = { 'length' : { 'label' : _('length') },
                           'area' : { 'label' : _('area') },
                           'perimeter' : { 'label' : _('perimeter') } }

        digitToolbar = self.parent.toolbars['vdigit']
        try:
            vectorName = digitToolbar.GetLayer().GetName()
        except AttributeError:
            vectorName = None # no vector selected for editing
        layer = UserSettings.Get(group='vdigit', key="layer", subkey='value')
        mapLayer = self.parent.toolbars['vdigit'].GetLayer()
        tree = self.parent.tree
        item = tree.FindItemByData('maplayer', mapLayer)
        row = 0
        for attrb in ['length', 'area', 'perimeter']:
            # checkbox
            check = wx.CheckBox(parent = panel, id = wx.ID_ANY,
                                label = self.geomAttrb[attrb]['label'])
            ### self.deleteRecord.SetValue(UserSettings.Get(group='vdigit', key="delRecord", subkey='enabled'))
            check.Bind(wx.EVT_CHECKBOX, self.OnGeomAttrb)
            # column (only numeric)
            column = gselect.ColumnSelect(parent = panel, size=(200, -1))
            column.InsertColumns(vector = vectorName,
                                 layer = layer, excludeKey = True,
                                 type = ['integer', 'double precision'])
            # units 
            if attrb == 'area':
                choices = Units.GetUnitsList('area')
            else:
                choices = Units.GetUnitsList('length')
            win_units = wx.Choice(parent = panel, id = wx.ID_ANY,
                                  choices = choices, size=(120, -1))
            
            # default values
            check.SetValue(False)
            if item and tree.GetPyData(item)[0]['vdigit'] and \
                    tree.GetPyData(item)[0]['vdigit'].has_key('geomAttr') and \
                    tree.GetPyData(item)[0]['vdigit']['geomAttr'].has_key(attrb):
                check.SetValue(True)
                column.SetStringSelection(tree.GetPyData(item)[0]['vdigit']['geomAttr'][attrb]['column'])
                if attrb == 'area':
                    type = 'area'
                else:
                    type = 'length'
                unitsIdx = Units.GetUnitsIndex(type, 
                                                tree.GetPyData(item)[0]['vdigit']['geomAttr'][attrb]['units'])
                win_units.SetSelection(unitsIdx)

            if not vectorName:
                check.Enable(False)
                column.Enable(False)
            
            if not check.IsChecked():
                column.Enable(False)
            
            self.geomAttrb[attrb]['check']  = check.GetId()
            self.geomAttrb[attrb]['column'] = column.GetId()
            self.geomAttrb[attrb]['units']  = win_units.GetId()

            gridSizer.Add(item = check,
                          flag = wx.ALIGN_CENTER_VERTICAL,
                          pos = (row, 0))
            gridSizer.Add(item = column,
                          pos = (row, 1))
            gridSizer.Add(item = win_units,
                          pos = (row, 2))
            row += 1
        
        note = '\n'.join(textwrap.wrap(_("Note: These settings are stored "
                                         " in the workspace not in the vector digitizer "
                                         "preferences."), 55))
        gridSizer.Add(item = wx.StaticText(parent = panel, id = wx.ID_ANY,
                                           label = note),
                      pos = (3, 0), span=(1, 3))
                      
        sizer.Add(item=gridSizer, proportion=1,
                  flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(item=sizer, proportion=0,
                   flag=wx.LEFT | wx.RIGHT | wx.BOTTOM | wx.EXPAND, border=5)

        # bindings
        self.Bind(wx.EVT_CHECKBOX, self.OnChangeAddRecord, self.addRecord)
        self.Bind(wx.EVT_CHOICE, self.OnChangeCategoryMode, self.categoryMode)
        self.Bind(wx.EVT_SPINCTRL, self.OnChangeLayer, self.layer)

        panel.SetSizer(border)
        
        return panel

    def __SymbologyData(self):
        """
        Data for __CreateSymbologyPage()

        label | checkbox | color
        """

        return (
            #            ("Background", "symbolBackground"),
            (_("Highlight"), "highlight"),
            (_("Highlight (duplicates)"), "highlightDupl"),
            (_("Point"), "point"),
            (_("Line"), "line"),
            (_("Boundary (no area)"), "boundaryNo"),
            (_("Boundary (one area)"), "boundaryOne"),
            (_("Boundary (two areas)"), "boundaryTwo"),
            (_("Centroid (in area)"), "centroidIn"),
            (_("Centroid (outside area)"), "centroidOut"),
            (_("Centroid (duplicate in area)"), "centroidDup"),
            (_("Node (one line)"), "nodeOne"),
            (_("Node (two lines)"), "nodeTwo"),
            (_("Vertex"), "vertex"),
            (_("Area (closed boundary + centroid)"), "area"),
            (_("Direction"), "direction"),)

    def OnGeomAttrb(self, event):
        """!Register geometry attributes (enable/disable)"""
        checked = event.IsChecked()
        id = event.GetId()
        key = None
        for attrb, val in self.geomAttrb.iteritems():
            if val['check'] == id:
                key = attrb
                break
        
        column = self.FindWindowById(self.geomAttrb[key]['column'])
        if checked:
            column.Enable()
        else:
            column.Enable(False)
        
    def OnChangeCategoryMode(self, event):
        """!Change category mode"""

        mode = event.GetSelection()
        UserSettings.Set(group='vdigit', key="categoryMode", subkey='selection', value=mode)
        if mode == 1: # manual entry
            self.category.Enable(True)
        elif self.category.IsEnabled(): # disable
            self.category.Enable(False)

        if mode == 2 and self.addRecord.IsChecked(): # no category
            self.addRecord.SetValue(False)

        self.parent.digit.SetCategory()
        self.category.SetValue(UserSettings.Get(group='vdigit', key='category', subkey='value'))

    def OnChangeLayer(self, event):
        """!Layer changed"""
        layer = event.GetInt()
        if layer > 0:
            UserSettings.Set(group='vdigit', key='layer', subkey='value', value=layer)
            self.parent.digit.SetCategory()
            self.category.SetValue(UserSettings.Get(group='vdigit', key='category', subkey='value'))
            
        event.Skip()

    def OnChangeAddRecord(self, event):
        """!Checkbox 'Add new record' status changed"""
        self.category.SetValue(self.parent.digit.SetCategory())
            
    def OnChangeSnappingValue(self, event):
        """!Change snapping value - update static text"""
        value = self.snappingValue.GetValue()
        
        if value < 0:
            region = self.parent.MapWindow.Map.GetRegion()
            res = (region['nsres'] + region['ewres']) / 2.
            threshold = self.parent.digit.driver.GetThreshold(value=res)
        else:
            if self.snappingUnit.GetStringSelection() == "map units":
                threshold = value
            else:
                threshold = self.parent.digit.driver.GetThreshold(value=value)
            
        if value == 0:
            self.snappingInfo.SetLabel(_("Snapping disabled"))
        elif value < 0:
            self.snappingInfo.SetLabel(_("Snapping threshold is %(value).1f %(units)s "
                                         "(based on comp. resolution)") % 
                                       {'value' : threshold,
                                        'units' : self.mapUnits.lower()})
        else:
            self.snappingInfo.SetLabel(_("Snapping threshold is %(value).1f %(units)s") % 
                                       {'value' : threshold,
                                        'units' : self.mapUnits.lower()})
        
        event.Skip()

    def OnChangeSnappingUnits(self, event):
        """!Snapping units change -> update static text"""
        value = self.snappingValue.GetValue()
        units = self.snappingUnit.GetStringSelection()
        threshold = self.parent.digit.driver.GetThreshold(value=value, units=units)

        if units == "map units":
            self.snappingInfo.SetLabel(_("Snapping threshold is %(value).1f %(units)s") % 
                                       {'value' : value,
                                        'units' : self.mapUnits})
        else:
            self.snappingInfo.SetLabel(_("Snapping threshold is %(value).1f %(units)s") % 
                                       {'value' : threshold,
                                        'units' : self.mapUnits})
            
        event.Skip()

    def OnChangeQuery(self, event):
        """!Change query"""
        if self.queryLength.GetValue():
            # length
            self.queryLengthSL.Enable(True)
            self.queryLengthValue.Enable(True)
            self.queryDangleSL.Enable(False)
            self.queryDangleValue.Enable(False)
        else:
            # dangle
            self.queryLengthSL.Enable(False)
            self.queryLengthValue.Enable(False)
            self.queryDangleSL.Enable(True)
            self.queryDangleValue.Enable(True)

    def OnSave(self, event):
        """!Button 'Save' clicked"""
        self.UpdateSettings()
        self.parent.toolbars['vdigit'].settingsDialog = None

        fileSettings = {}
        UserSettings.ReadSettingsFile(settings=fileSettings)
        fileSettings['vdigit'] = UserSettings.Get(group='vdigit')
        
        file = UserSettings.SaveToFile(fileSettings)
        self.parent.GetLayerManager().goutput.WriteLog(_('Vector digitizer settings saved to file <%s>.') % file)
        
        self.Destroy()

        event.Skip()
        
    def OnApply(self, event):
        """!Button 'Apply' clicked"""
        self.UpdateSettings()

    def OnCancel(self, event):
        """!Button 'Cancel' clicked"""
        self.parent.toolbars['vdigit'].settingsDialog = None
        self.Destroy()

        if event:
            event.Skip()
        
    def UpdateSettings(self):
        """!Update UserSettings"""

        # symbology
        for key, (enabled, color) in self.symbology.iteritems():
            if enabled:
                UserSettings.Set(group='vdigit', key='symbol',
                                 subkey=[key, 'enabled'],
                                 value=enabled.IsChecked())
                UserSettings.Set(group='vdigit', key='symbol',
                                 subkey=[key, 'color'],
                                 value=tuple(color.GetColour()))
            else:
                UserSettings.Set(group='vdigit', key='symbol',
                                 subkey=[key, 'color'],
                                 value=tuple(color.GetColour()))
        # display
        UserSettings.Set(group='vdigit', key="lineWidth", subkey='value',
                         value=int(self.lineWidthValue.GetValue()))

        # snapping
        UserSettings.Set(group='vdigit', key="snapping", subkey='value',
                         value=int(self.snappingValue.GetValue()))
        UserSettings.Set(group='vdigit', key="snapping", subkey='units',
                         value=self.snappingUnit.GetStringSelection())
        UserSettings.Set(group='vdigit', key="snapToVertex", subkey='enabled',
                         value=self.snapVertex.IsChecked())
        
        # digitize new feature
        UserSettings.Set(group='vdigit', key="addRecord", subkey='enabled',
                         value=self.addRecord.IsChecked())
        UserSettings.Set(group='vdigit', key="layer", subkey='value',
                         value=int(self.layer.GetValue()))
        UserSettings.Set(group='vdigit', key="category", subkey='value',
                         value=int(self.category.GetValue()))
        UserSettings.Set(group='vdigit', key="categoryMode", subkey='selection',
                         value=self.categoryMode.GetSelection())

        # digitize new area
        UserSettings.Set(group='vdigit', key="addCentroid", subkey='enabled',
                         value=self.addCentroid.IsChecked())
        UserSettings.Set(group='vdigit', key="catBoundary", subkey='enabled',
                         value=self.catBoundary.IsChecked())
        
        # delete existing feature
        UserSettings.Set(group='vdigit', key="delRecord", subkey='enabled',
                         value=self.deleteRecord.IsChecked())

        # geometry attributes (workspace)
        mapLayer = self.parent.toolbars['vdigit'].GetLayer()
        tree = self.parent.tree
        item = tree.FindItemByData('maplayer', mapLayer)
        for key, val in self.geomAttrb.iteritems():
            checked = self.FindWindowById(val['check']).IsChecked()
            column  = self.FindWindowById(val['column']).GetValue()
            unitsIdx = self.FindWindowById(val['units']).GetSelection()
            if item and not tree.GetPyData(item)[0]['vdigit']: 
                tree.GetPyData(item)[0]['vdigit'] = { 'geomAttr' : dict() }
            
            if checked: # enable
                if key == 'area':
                    type = key
                else:
                    type = 'length'
                unitsKey = Units.GetUnitsKey(type, unitsIdx)
                tree.GetPyData(item)[0]['vdigit']['geomAttr'][key] = { 'column' : column,
                                                                       'units' : unitsKey }
            else:
                if item and tree.GetPyData(item)[0]['vdigit'] and \
                        tree.GetPyData(item)[0]['vdigit']['geomAttr'].has_key(key):
                    del tree.GetPyData(item)[0]['vdigit']['geomAttr'][key]
        
        # snapping threshold
        self.parent.digit.threshold = self.parent.digit.driver.GetThreshold()

        # query tool
        if self.queryLength.GetValue():
            UserSettings.Set(group='vdigit', key="query", subkey='selection',
                             value=0)
        else:
            UserSettings.Set(group='vdigit', key="query", subkey='type',
                             value=1)
        UserSettings.Set(group='vdigit', key="query", subkey='box',
                         value=self.queryBox.IsChecked())
        UserSettings.Set(group='vdigit', key="queryLength", subkey='than-selection',
                         value=self.queryLengthSL.GetSelection())
        UserSettings.Set(group='vdigit', key="queryLength", subkey='thresh',
                         value=int(self.queryLengthValue.GetValue()))
        UserSettings.Set(group='vdigit', key="queryDangle", subkey='than-selection',
                         value=self.queryDangleSL.GetSelection())
        UserSettings.Set(group='vdigit', key="queryDangle", subkey='thresh',
                         value=int(self.queryDangleValue.GetValue()))

        # select features
        for feature in ('point', 'line',
                        'centroid', 'boundary'):
            UserSettings.Set(group='vdigit', key='selectType',
                             subkey=[feature, 'enabled'],
                             value=self.FindWindowById(self.selectFeature[feature]).IsChecked())
        UserSettings.Set(group='vdigit', key="selectThresh", subkey='value',
                         value=int(self.selectThreshValue.GetValue()))
        UserSettings.Set(group='vdigit', key="checkForDupl", subkey='enabled',
                         value=self.checkForDupl.IsChecked())
        UserSettings.Set(group='vdigit', key="selectInside", subkey='enabled',
                         value=self.selectIn.IsChecked())

        # on-exit
        UserSettings.Set(group='vdigit', key="saveOnExit", subkey='enabled',
                         value=self.save.IsChecked())

        # break lines
        UserSettings.Set(group='vdigit', key="breakLines", subkey='enabled',
                         value=self.intersect.IsChecked())
        
        # update driver settings
        self.parent.digit.driver.UpdateSettings()

        # update digit settings
        self.parent.digit.UpdateSettings()
        
        # redraw map if auto-rendering is enabled
        if self.parent.statusbarWin['render'].GetValue(): 
            self.parent.OnRender(None)

class VDigitCategoryDialog(wx.Dialog, listmix.ColumnSorterMixin):
    """
    Dialog used to display/modify categories of vector objects
    
    @param parent
    @param title dialog title
    @param query {coordinates, qdist} - used by v.edit/v.what
    @param cats  directory of lines (layer/categories) - used by vdigit
    @param pos
    @param style
    """
    def __init__(self, parent, title,
                 map, query=None, cats=None,
                 pos=wx.DefaultPosition,
                 style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER):

        # parent
        self.parent = parent # mapdisplay.BufferedWindow class instance

        # map name
        self.map = map

        # line : {layer: [categories]}
        self.cats = {}
        
        # do not display dialog if no line is found (-> self.cats)
        if cats is None:
            if self.__GetCategories(query[0], query[1]) == 0 or not self.line:
                Debug.msg(3, "VDigitCategoryDialog(): nothing found!")
        else:
            self.cats = cats
            for line in cats.keys():
                for layer in cats[line].keys():
                    self.cats[line][layer] = list(cats[line][layer])
            
            layers = []
            for layer in self.parent.parent.digit.GetLayers():
                layers.append(str(layer))
        
        # make copy of cats (used for 'reload')
        self.cats_orig = copy.deepcopy(self.cats)
        
        wx.Dialog.__init__(self, parent=self.parent, id=wx.ID_ANY, title=title,
                          style=style, pos=pos)
        
        # list of categories
        box = wx.StaticBox(parent=self, id=wx.ID_ANY,
                           label=" %s " % _("List of categories - right-click to delete"))
        listSizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        self.list = CategoryListCtrl(parent=self, id=wx.ID_ANY,
                                     style=wx.LC_REPORT |
                                     wx.BORDER_NONE |
                                     wx.LC_SORT_ASCENDING |
                                     wx.LC_HRULES |
                                     wx.LC_VRULES)
        # sorter
        self.fid = self.cats.keys()[0]
        self.itemDataMap = self.list.Populate(self.cats[self.fid])
        listmix.ColumnSorterMixin.__init__(self, 2)
        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)
        if len(self.cats.keys()) == 1:
            self.fidMulti.Show(False)
            self.fidText.SetLabel(str(self.fid))
        else:
            self.fidText.Show(False)
            choices = []
            for fid in self.cats.keys():
                choices.append(str(fid))
            self.fidMulti.SetItems(choices)
            self.fidMulti.SetSelection(0)
        
        listSizer.Add(item=self.list, proportion=1, flag=wx.EXPAND)

        # add new category
        box = wx.StaticBox(parent=self, id=wx.ID_ANY,
                           label=" %s " % _("Add new category"))
        addSizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        flexSizer = wx.FlexGridSizer (cols=5, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(3)

        layerNewTxt = wx.StaticText(parent=self, id=wx.ID_ANY,
                                 label="%s:" % _("Layer"))
        self.layerNew = wx.Choice(parent=self, id=wx.ID_ANY, size=(75, -1),
                                  choices=layers)
        if len(layers) > 0:
            self.layerNew.SetSelection(0)
        
        catNewTxt = wx.StaticText(parent=self, id=wx.ID_ANY,
                               label="%s:" % _("Category"))

        try:
            newCat = max(self.cats[self.fid][1]) + 1
        except KeyError:
            newCat = 1
        self.catNew = wx.SpinCtrl(parent=self, id=wx.ID_ANY, size=(75, -1),
                                  initial=newCat, min=0, max=1e9)
        btnAddCat = wx.Button(self, wx.ID_ADD)
        flexSizer.Add(item=layerNewTxt, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(item=self.layerNew, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(item=catNewTxt, proportion=0,
                      flag=wx.ALIGN_CENTER_VERTICAL | wx.ALIGN_RIGHT | wx.LEFT,
                      border=10)
        flexSizer.Add(item=self.catNew, proportion=0,
                      flag=wx.FIXED_MINSIZE | wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(item=btnAddCat, proportion=0,
                      flag=wx.EXPAND | wx.ALIGN_RIGHT | wx.FIXED_MINSIZE)
        addSizer.Add(item=flexSizer, proportion=1, flag=wx.ALL | wx.EXPAND, border=5)

        # buttons
        btnApply = wx.Button(self, wx.ID_APPLY)
        btnApply.SetToolTipString(_("Apply changes"))
        btnCancel = wx.Button(self, wx.ID_CANCEL)
        btnCancel.SetToolTipString(_("Ignore changes and close dialog"))
        btnOk = wx.Button(self, wx.ID_OK)
        btnOk.SetToolTipString(_("Apply changes and close dialog"))
        btnOk.SetDefault()

        # sizers
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(btnCancel)
        #btnSizer.AddButton(btnReload)
        #btnSizer.SetNegativeButton(btnReload)
        btnSizer.AddButton(btnApply)
        btnSizer.AddButton(btnOk)
        btnSizer.Realize()
        
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(item=listSizer, proportion=1,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)
        mainSizer.Add(item=addSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALIGN_CENTER |
                      wx.LEFT | wx.RIGHT | wx.BOTTOM, 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.ALL, border=5)
        mainSizer.Add(item=btnSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)
        
        self.SetSizer(mainSizer)
        mainSizer.Fit(self)
        self.SetAutoLayout(True)

        # set min size for dialog
        self.SetMinSize(self.GetBestSize())

        # bindings
        # buttons
        #btnReload.Bind(wx.EVT_BUTTON, self.OnReload)
        btnApply.Bind(wx.EVT_BUTTON, self.OnApply)
        btnOk.Bind(wx.EVT_BUTTON, self.OnOK)
        btnAddCat.Bind(wx.EVT_BUTTON, self.OnAddCat)
        btnCancel.Bind(wx.EVT_BUTTON, self.OnCancel)
                                     
        # list
        # self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnItemSelected, self.list)
        # self.list.Bind(wx.EVT_RIGHT_DOWN, self.OnRightDown)
        self.list.Bind(wx.EVT_COMMAND_RIGHT_CLICK, self.OnRightUp) #wxMSW
        self.list.Bind(wx.EVT_RIGHT_UP, self.OnRightUp) #wxGTK
        self.Bind(wx.EVT_LIST_BEGIN_LABEL_EDIT, self.OnBeginEdit, self.list)
        self.Bind(wx.EVT_LIST_END_LABEL_EDIT, self.OnEndEdit, self.list)
        self.Bind(wx.EVT_LIST_COL_CLICK, self.OnColClick, self.list)

    def GetListCtrl(self):
        """!Used by ColumnSorterMixin"""
        return self.list

    def OnColClick(self, event):
        """!Click on column header (order by)"""
        event.Skip()
        
    def OnBeginEdit(self, event):
        """!Editing of item started"""
        event.Allow()

    def OnEndEdit(self, event):
        """!Finish editing of item"""
        itemIndex = event.GetIndex()
        layerOld = int (self.list.GetItem(itemIndex, 0).GetText())
        catOld = int (self.list.GetItem(itemIndex, 1).GetText())

        if event.GetColumn() == 0:
            layerNew = int(event.GetLabel())
            catNew = catOld
        else:
            layerNew = layerOld
            catNew = int(event.GetLabel())
        
        try:
            if layerNew not in self.cats[self.fid].keys():
                self.cats[self.fid][layerNew] = []
            self.cats[self.fid][layerNew].append(catNew)
            self.cats[self.fid][layerOld].remove(catOld)
        except:
            event.Veto()
            self.list.SetStringItem(itemIndex, 0, str(layerNew))
            self.list.SetStringItem(itemIndex, 1, str(catNew))
            dlg = wx.MessageDialog(self, _("Unable to add new layer/category <%(layer)s/%(category)s>.\n"
                                           "Layer and category number must be integer.\n"
                                           "Layer number must be greater then zero.") %
                                   { 'layer': self.layerNew.GetStringSelection(),
                                     'category' : str(self.catNew.GetValue()) },
                                   _("Error"), wx.OK | wx.ICON_ERROR)
            dlg.ShowModal()
            dlg.Destroy()
            return False

    def OnRightDown(self, event):
        """!Mouse right button down"""
        x = event.GetX()
        y = event.GetY()
        item, flags = self.list.HitTest((x, y))

        if item !=  wx.NOT_FOUND and \
                flags & wx.LIST_HITTEST_ONITEM:
            self.list.Select(item)

        event.Skip()

    def OnRightUp(self, event):
        """!Mouse right button up"""
        if not hasattr(self, "popupID1"):
            self.popupID1 = wx.NewId()
            self.popupID2 = wx.NewId()
            self.popupID3 = wx.NewId()
            self.Bind(wx.EVT_MENU, self.OnItemDelete,    id=self.popupID1)
            self.Bind(wx.EVT_MENU, self.OnItemDeleteAll, id=self.popupID2)
            self.Bind(wx.EVT_MENU, self.OnReload, id=self.popupID3)

        # generate popup-menu
        menu = wx.Menu()
        menu.Append(self.popupID1, _("Delete selected"))
        if self.list.GetFirstSelected() == -1:
            menu.Enable(self.popupID1, False)

        menu.Append(self.popupID2, _("Delete all"))
        menu.AppendSeparator()
        menu.Append(self.popupID3, _("Reload"))

        self.PopupMenu(menu)
        menu.Destroy()

    def OnItemSelected(self, event):
        """!Item selected"""
        event.Skip()

    def OnItemDelete(self, event):
        """!Delete selected item(s) from the list (layer/category pair)"""
        item = self.list.GetFirstSelected()
        while item != -1:
            layer = int (self.list.GetItem(item, 0).GetText())
            cat = int (self.list.GetItem(item, 1).GetText())
            self.list.DeleteItem(item)
            self.cats[self.fid][layer].remove(cat)

            item = self.list.GetFirstSelected()
            
        event.Skip()
        
    def OnItemDeleteAll(self, event):
        """!Delete all items from the list"""
        self.list.DeleteAllItems()
        self.cats[self.fid] = {}

        event.Skip()

    def OnFeature(self, event):
        """!Feature id changed (on duplicates)"""
        self.fid = int(event.GetString())
        
        self.itemDataMap = self.list.Populate(self.cats[self.fid],
                                              update=True)

        try:
            newCat = max(self.cats[self.fid][1]) + 1
        except KeyError:
            newCat = 1
            
        self.catNew.SetValue(newCat)
        
        event.Skip()
        
    def __GetCategories(self, coords, qdist):
        """!Get layer/category pairs for all available
        layers

        Return True line found or False if not found"""
        
        ret = gcmd.RunCommand('v.what',
                              parent = self,
                              quiet = True,
                              map = self.map,
                              east_north = '%f,%f' % \
                                  (float(coords[0]), float(coords[1])),
                              distance = qdist)

        if not ret:
            return False

        for item in ret.splitlines():
            litem = item.lower()
            if "id:" in litem: # get line id
                self.line = int(item.split(':')[1].strip())
            elif "layer:" in litem: # add layer
                layer = int(item.split(':')[1].strip())
                if layer not in self.cats.keys():
                    self.cats[layer] = []
            elif "category:" in litem: # add category
                self.cats[layer].append(int(item.split(':')[1].strip()))

        return True

    def OnReload(self, event):
        """!Reload button pressed"""
        # restore original list
        self.cats = copy.deepcopy(self.cats_orig)

        # polulate list
        self.itemDataMap = self.list.Populate(self.cats[self.fid],
                                              update=True)

        event.Skip()

    def OnCancel(self, event):
        """!Cancel button pressed"""
        self.parent.parent.dialogs['category'] = 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 OnApply(self, event):
        """!Apply button pressed"""
        for fid in self.cats.keys():
            newfid = self.ApplyChanges(fid)
            if fid == self.fid:
                self.fid = newfid
            
    def ApplyChanges(self, fid):
        cats = self.cats[fid]
        cats_orig = self.cats_orig[fid]

        # action : (catsFrom, catsTo)
        check = {'catadd': (cats,      cats_orig),
                 'catdel': (cats_orig, cats)}

        newfid = -1
        
        # add/delete new category
        for action, catsCurr in check.iteritems():
            for layer in catsCurr[0].keys():
                catList = []
                for cat in catsCurr[0][layer]:
                    if layer not in catsCurr[1].keys() or \
                            cat not in catsCurr[1][layer]:
                        catList.append(cat)
                if catList != []:
                    if action == 'catadd':
                        add = True
                    else:
                        add = False
                        
                    newfid = self.parent.parent.digit.SetLineCats(fid, layer,
                                                                      catList, add)
                    if len(self.cats.keys()) == 1:
                        self.fidText.SetLabel("%d" % newfid)
                    else:
                        choices = self.fidMulti.GetItems()
                        choices[choices.index(str(fid))] = str(newfid)
                        self.fidMulti.SetItems(choices)
                        self.fidMulti.SetStringSelection(str(newfid))
                    
                    self.cats[newfid] = self.cats[fid]
                    del self.cats[fid]
                    
                    fid = newfid
                    if self.fid < 0:
                        wx.MessageBox(parent=self, message=_("Unable to update vector map."),
                                      caption=_("Error"), style=wx.OK | wx.ICON_ERROR)
        
        self.cats_orig[fid] = copy.deepcopy(cats)
        
        return newfid

    def OnOK(self, event):
        """!OK button pressed"""
        self.OnApply(event)
        self.OnCancel(event)

    def OnAddCat(self, event):
        """!Button 'Add' new category pressed"""
        try:
            layer = int(self.layerNew.GetStringSelection())
            cat   = int(self.catNew.GetValue())
            if layer <= 0:
                raise ValueError
        except ValueError:
            dlg = wx.MessageDialog(self, _("Unable to add new layer/category <%(layer)s/%(category)s>.\n"
                                           "Layer and category number must be integer.\n"
                                           "Layer number must be greater then zero.") %
                                   {'layer' : str(self.layerNew.GetValue()),
                                    'category' : str(self.catNew.GetValue())},
                                   _("Error"), wx.OK | wx.ICON_ERROR)
            dlg.ShowModal()
            dlg.Destroy()
            return False

        if layer not in self.cats[self.fid].keys():
            self.cats[self.fid][layer] = []

        self.cats[self.fid][layer].append(cat)

        # reload list
        self.itemDataMap = self.list.Populate(self.cats[self.fid],
                                              update=True)

        # update category number for add
        self.catNew.SetValue(cat + 1)

        event.Skip()

        return True

    def GetLine(self):
        """!Get id of selected line of 'None' if no line is selected"""
        return self.cats.keys()

    def UpdateDialog(self, query=None, cats=None):
        """!Update dialog
        
        @param query {coordinates, distance} - v.edit/v.what
        @param cats  directory layer/cats    - vdigit
        Return True if updated otherwise False
        """
        # line: {layer: [categories]}
        self.cats = {}
        # do not display dialog if no line is found (-> self.cats)
        if cats is None:
            ret = self.__GetCategories(query[0], query[1])
        else:
            self.cats = cats
            for line in cats.keys():
                for layer in cats[line].keys():
                    self.cats[line][layer] = list(cats[line][layer])
            ret = 1
        if ret == 0 or len(self.cats.keys()) < 1:
            Debug.msg(3, "VDigitCategoryDialog(): nothing found!")
            return False
        
        # make copy of cats (used for 'reload')
        self.cats_orig = copy.deepcopy(self.cats)

        # polulate list
        self.fid = self.cats.keys()[0]
        self.itemDataMap = self.list.Populate(self.cats[self.fid],
                                              update=True)

        try:
            newCat = max(self.cats[self.fid][1]) + 1
        except KeyError:
            newCat = 1
        self.catNew.SetValue(newCat)
        
        if len(self.cats.keys()) == 1:
            self.fidText.Show(True)
            self.fidMulti.Show(False)
            self.fidText.SetLabel("%d" % self.fid)
        else:
            self.fidText.Show(False)
            self.fidMulti.Show(True)
            choices = []
            for fid in self.cats.keys():
                choices.append(str(fid))
            self.fidMulti.SetItems(choices)
            self.fidMulti.SetSelection(0)

        self.Layout()
        
        return True

class CategoryListCtrl(wx.ListCtrl,
                       listmix.ListCtrlAutoWidthMixin,
                       listmix.TextEditMixin):
    """!List of layers/categories"""

    def __init__(self, parent, id, pos=wx.DefaultPosition,
                 size=wx.DefaultSize, style=0):
        
        self.parent = parent
        
        wx.ListCtrl.__init__(self, parent, id, pos, size, style)

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

    def Populate(self, cats, update=False):
        """!Populate the list"""

        itemData = {} # requested by sorter

        if not update:
            self.InsertColumn(0, _("Layer"))
            self.InsertColumn(1, _("Category"))
        else:
            self.DeleteAllItems()

        i = 1
        for layer in cats.keys():
            catsList = cats[layer]
            for cat in catsList:
                index = self.InsertStringItem(sys.maxint, str(catsList[0]))
                self.SetStringItem(index, 0, str(layer))
                self.SetStringItem(index, 1, str(cat))
                self.SetItemData(index, i)
                itemData[i] = (str(layer), str(cat))
                i = i + 1

        if not update:
            self.SetColumnWidth(0, 100)
            self.SetColumnWidth(1, wx.LIST_AUTOSIZE)

        self.currentItem = 0

        return itemData

class VDigitZBulkDialog(wx.Dialog):
    """
    Dialog used for Z bulk-labeling tool
    """
    def __init__(self, parent, title, nselected, style=wx.DEFAULT_DIALOG_STYLE):
        wx.Dialog.__init__(self, parent=parent, id=wx.ID_ANY, title=title, style=style)

        self.parent = parent # mapdisplay.BufferedWindow class instance

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

        border = wx.BoxSizer(wx.VERTICAL)
        
        txt = wx.StaticText(parent=self,
                            label=_("%d lines selected for z bulk-labeling") % nselected);
        border.Add(item=txt, proportion=0, flag=wx.ALL | wx.EXPAND, border=5)

        box   = wx.StaticBox (parent=self, id=wx.ID_ANY, label=" %s " % _("Set value"))
        sizer = wx.StaticBoxSizer(box, wx.VERTICAL)
        flexSizer = wx.FlexGridSizer (cols=2, hgap=5, vgap=5)
        flexSizer.AddGrowableCol(0)

        # starting value
        txt = wx.StaticText(parent=self,
                            label=_("Starting value"));
        self.value = wx.SpinCtrl(parent=self, id=wx.ID_ANY, size=(150, -1),
                                 initial=0,
                                 min=-1e6, max=1e6)
        flexSizer.Add(txt, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.value, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)

        # step
        txt = wx.StaticText(parent=self,
                            label=_("Step"))
        self.step  = wx.SpinCtrl(parent=self, id=wx.ID_ANY, size=(150, -1),
                                 initial=0,
                                 min=0, max=1e6)
        flexSizer.Add(txt, proportion=0, flag=wx.ALIGN_CENTER_VERTICAL)
        flexSizer.Add(self.step, proportion=0, flag=wx.ALIGN_CENTER | wx.FIXED_MINSIZE)

        sizer.Add(item=flexSizer, proportion=1, flag=wx.ALL | wx.EXPAND, border=1)
        border.Add(item=sizer, proportion=1, flag=wx.ALL | wx.EXPAND, border=0)

        # buttons
        btnCancel = wx.Button(self, wx.ID_CANCEL)
        btnOk = wx.Button(self, wx.ID_OK)
        btnOk.SetDefault()

        # sizers
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(btnCancel)
        btnSizer.AddButton(btnOk)
        btnSizer.Realize()
        
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(item=border, proportion=1, flag=wx.EXPAND | wx.ALL, border=5)
        mainSizer.Add(item=btnSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

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

class VDigitDuplicatesDialog(wx.Dialog):
    """
    Show duplicated feature ids
    """
    def __init__(self, parent, data, title=_("List of duplicates"),
                 style=wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER,
                 pos=wx.DefaultPosition):

        wx.Dialog.__init__(self, parent=parent, id=wx.ID_ANY, title=title, style=style,
                           pos=pos)
        
        self.parent = parent # BufferedWindow
        self.data = data
        self.winList = []

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

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

        id = 1
        for key in self.data.keys():
            panel = wx.Panel(parent=self.notebook, id=wx.ID_ANY)
            self.notebook.AddPage(page=panel, text=" %d " % (id))
            
            # notebook body
            border = wx.BoxSizer(wx.VERTICAL)

            win = CheckListFeature(parent=panel, data=list(self.data[key]))
            self.winList.append(win.GetId())

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

            panel.SetSizer(border)

            id += 1

        # buttons
        btnCancel = wx.Button(self, wx.ID_CANCEL)
        btnOk = wx.Button(self, wx.ID_OK)
        btnOk.SetDefault()

        # sizers
        btnSizer = wx.StdDialogButtonSizer()
        btnSizer.AddButton(btnCancel)
        btnSizer.AddButton(btnOk)
        btnSizer.Realize()
        
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        mainSizer.Add(item=self.notebook, proportion=1, flag=wx.EXPAND | wx.ALL, border=5)
        mainSizer.Add(item=btnSizer, proportion=0,
                      flag=wx.EXPAND | wx.ALL | wx.ALIGN_CENTER, border=5)

        self.SetSizer(mainSizer)
        mainSizer.Fit(self)
        self.SetAutoLayout(True)

        # set min size for dialog
        self.SetMinSize((250, 180))

    def GetUnSelected(self):
        """!Get unselected items (feature id)

        @return list of ids
        """
        ids = []
        for id in self.winList:
            wlist = self.FindWindowById(id)

            for item in range(wlist.GetItemCount()):
                if not wlist.IsChecked(item):
                    ids.append(int(wlist.GetItem(item, 0).GetText()))
                    
        return ids

class CheckListFeature(wx.ListCtrl, listmix.ListCtrlAutoWidthMixin, listmix.CheckListCtrlMixin):
    """!List of mapset/owner/group"""
    def __init__(self, parent, data,
                 pos=wx.DefaultPosition, log=None):
        self.parent = parent
        self.data = data

        wx.ListCtrl.__init__(self, parent, wx.ID_ANY,
                             style=wx.LC_REPORT)

        listmix.CheckListCtrlMixin.__init__(self)

        self.log = log

        # setup mixins
        listmix.ListCtrlAutoWidthMixin.__init__(self)

        self.LoadData(self.data)

    def LoadData(self, data):
        """!Load data into list"""
        self.InsertColumn(0, _('Feature id'))
        self.InsertColumn(1, _('Layer (Categories)'))

        for item in data:
            index = self.InsertStringItem(sys.maxint, str(item[0]))
            self.SetStringItem(index, 1, str(item[1]))

        # enable all items by default
        for item in range(self.GetItemCount()):
            self.CheckItem(item, True)

        self.SetColumnWidth(col=0, width=wx.LIST_AUTOSIZE_USEHEADER)
        self.SetColumnWidth(col=1, width=wx.LIST_AUTOSIZE_USEHEADER)
                
    def OnCheckItem(self, index, flag):
        """!Mapset checked/unchecked"""
        pass