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

#! /usr/bin/python
"""Construct simple wx.Python GUI from a GRASS command interface description.

Classes:
 * testSAXContentHandler
 * grassTask
 * processTask
 * helpPanel
 * mainFrame
 * cmdPanel
 * GrassGUIApp
 * GUI

 Copyright (C) 2000-2007 by the GRASS Development Team

 This program is free software under the GPL (>=v2)
 Read the file COPYING coming with GRASS for details.

 This program is just a coarse approach to
 automatically build a GUI from a xml-based
 GRASS user interface description.

 You need to have Python 2.4, wxPython 2.8 and python-xml.

 The XML stream is read from executing the command given in the
 command line, thus you may call it for instance this way:

 python <this file.py> r.basins.fill

 Or you set an alias or wrap the call up in a nice
 shell script, GUI environment ... please contribute your idea.

 Updated to wxPython 2.8 syntax and contrib widgets.
 Methods added to make it callable by gui.
 Method added to automatically re-run with pythonw on a Mac.

@author Jan-Oliver Wagner <jan@intevation.de>
Bernhard Reiter <bernhard@intevation.de>
Michael Barton, Arizona State University
Daniel Calvelo <dca.gis@gmail.com>
Martin Landa <landa.martin@gmail.com>

@todo
 - verify option value types
 - use DOM instead of SAX
"""
__version__ ="$Revision$"

import sys
import re
import string
import textwrap
import os
from os import system
import time
start = time.time()

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


import globalvar
globalvar.CheckForWx()

import wx
import wx.lib.flatnotebook as FN
import wx.lib.colourselect as csel
import wx.lib.filebrowsebutton as filebrowse
from wx.lib.expando import ExpandoTextCtrl, EVT_ETC_LAYOUT_NEEDED
import wx.html

# Do the python 2.0 standard xml thing and map it on the old names
import xml.sax
import xml.sax.handler
HandlerBase=xml.sax.handler.ContentHandler
from xml.sax import make_parser

import utils

gisbase = os.getenv("GISBASE")
if gisbase is None:
    print >>sys.stderr, "We don't seem to be properly installed, or we are being run outside GRASS. Expect glitches."
    gisbase = os.path.join(os.path.dirname( sys.argv[0] ), os.path.pardir)
    wxbase = gisbase
else:
    wxbase = os.path.join(globalvar.ETCWXDIR)

sys.path.append( wxbase)
imagepath = os.path.join(wxbase, "images")
sys.path.append(imagepath)

import grassenv
import gselect
import gcmd
import goutput
import utils
from preferences import globalSettings as UserSettings
try:
    import subprocess
except:
    from compat import subprocess

utils.reexec_with_pythonw()

# From lib/gis/col_str.c, except purple which is mentioned
# there but not given RGB values
str2rgb = {'aqua': (100, 128, 255),
           'black': (0, 0, 0),
           'blue': (0, 0, 255),
           'brown': (180, 77, 25),
           'cyan': (0, 255, 255),
           'gray': (128, 128, 128),
           'green': (0, 255, 0),
           'grey': (128, 128, 128),
           'indigo': (0, 128, 255),
           'magenta': (255, 0, 255),
           'orange': (255, 128, 0),
           'purple': (128, 0, 128),
           'red': (255, 0, 0),
           'violet': (128, 0, 255),
           'white': (255, 255, 255),
           'yellow': (255, 255, 0)}
rgb2str = {}
for (s,r) in str2rgb.items():
    rgb2str[ r ] = s

def color_resolve(color):
    if len(color)>0 and color[0] in "0123456789":
        rgb = tuple(map(int,color.split( ':' )))
        label = color
    else:
        # Convert color names to RGB
        try:
            rgb = str2rgb[ color ]
            label = color
        except KeyError:
            rgb = (200,200,200)
            label = _('Select Color')
    return (rgb, label)


def normalize_whitespace(text):
    """Remove redundant whitespace from a string"""
    return string.join( string.split(text), ' ')

def text_beautify( someString ):
    """
    Make really long texts shorter, clean up whitespace and
    remove trailing punctuation.
    """
    # TODO: remove magic number (calculate a correct value from
    # pixelSize of text and the magic number for maximum size)
    return escape_ampersand( string.strip(
        os.linesep.join( textwrap.wrap( normalize_whitespace(someString), 70 ) ),
        ".,;:" ) )

def escape_ampersand(text):
    """Escapes ampersands with additional ampersand for GUI"""
    return string.replace(text, "&", "&&")

class testSAXContentHandler(HandlerBase):
# SAX compliant
    def characters(self, ch, start, length):
        pass

def test_for_broken_SAX():
    ch=testSAXContentHandler()
    try:
        xml.sax.parseString("""<?xml version="1.0"?>
            <child1 name="paul">Text goes here</child1>
            """,ch)
    except TypeError:
        return 1
    return 0

class grassTask:
    """
    This class holds the structures needed for both filling by the parser and
    use by the interface constructor.

    Use as either grassTask() for empty definition or grassTask( 'grass.command' )
    for parsed filling.
    """
    def __init__(self, grassModule = None):
        self.name = _('unknown')
        self.params = []
        self.description = ''
        self.label = ''
        self.flags = []
        self.keywords = []
        if grassModule is not None:
            xml.sax.parseString( getInterfaceDescription( grassModule ) , processTask( self ) )

    def get_param( self, aParam ):
        """
        Find and return a param by name.
        """
        for p in self.params:
            lparam = len(aParam)
            if p['name'] == aParam or \
                    p['name'][:lparam] == aParam:
                return p
        raise ValueError, _("Parameter not found: %s") % aParam

    def set_param(self, aParam, aValue):
        """
        Set param value/values.
        """
        param = self.get_param(aParam)
        param['value'] = aValue
            
    def get_flag( self, aFlag ):
        """
        Find and return a flag by name.
        """
        for f in self.flags:
            if f['name'] == aFlag:
                return f
        raise ValueError, _("Flag not found: %s") % aFlag

    def set_flag(self, aFlag, aValue):
        """
        Enable / disable flag.
        """
        param = self.get_flag(aFlag)
        param['value'] = aValue
            

    def getCmd(self, ignoreErrors = False):
        """
        Produce an array of command name and arguments for feeding
        into some execve-like command processor.

        If ignoreErrors==True then it will return whatever has been
        built so far, even though it would not be a correct command
        for GRASS.
        """
        cmd = [self.name]
        errors = 0
        errStr = ""

        for flag in self.flags:
            if 'value' in flag and flag['value']:
                if len(flag['name']) > 1: # e.g. overwrite
                    cmd += [ '--' + flag['name'] ]
                else:
                    cmd += [ '-' + flag['name'] ]
        for p in self.params:
            if p.get('value','') == '' and p.get('required','no') != 'no':
                if p.get('default', '') != '':
                    cmd += [ '%s=%s' % ( p['name'], p['default'] ) ]
                else:
                    cmd += [ '%s=%s' % ( p['name'], _('<required>') ) ]
                    errStr += _("Parameter %(name)s (%(desc)s) is missing.\n") % \
                        {'name' : p['name'], 'desc' : p['description']}
                    errors += 1
            elif p.get('value','') != '' and p['value'] != p.get('default','') :
                # Output only values that have been set, and different from defaults
                cmd += [ '%s=%s' % ( p['name'], p['value'] ) ]
        if errors and not ignoreErrors:
            raise ValueError, errStr

        return cmd

class processTask(HandlerBase):
    """
    A SAX handler for the --interface-description output, as
    defined in grass-interface.dtd. Extend or modify this and the
    DTD if the XML output of GRASS' parser is extended or modified.
    """
    def __init__(self, task_description):
        self.inLabelContent = False
        self.inDescriptionContent = False
        self.inDefaultContent = False
        self.inValueContent = False
        self.inParameter = False
        self.inFlag = False
        self.inGispromptContent = False
        self.inGuisection = False
        self.inKeywordsContent = False
        self.inKeyDesc = False
        self.addKeyDesc = False
        self.inFirstParameter = True
        self.task = task_description

    def startElement(self, name, attrs):

        if name == 'task':
            self.task.name = attrs.get('name', None)

        if name == 'parameter':
            self.inParameter = True;
            self.param_label = ''
            self.param_description = ''
            self.param_default = ''
            self.param_values = []
            self.param_values_description = []
            self.param_gisprompt = False
            self.param_age = ''
            self.param_element = ''
            self.param_prompt = ''
            self.param_guisection = ''
            self.param_key_desc = []
            # Look for the parameter name, type, requiredness
            self.param_name = attrs.get('name', None)
            self.param_type = attrs.get('type', None)
            self.param_required = attrs.get('required', None)
            self.param_multiple = attrs.get('multiple', None)

        if name == 'flag':
            self.inFlag = True;
            self.flag_description = ''
            self.flag_default = ''
            self.flag_guisection = ''
            self.flag_values = []
            # Look for the flag name
            self.flag_name = attrs.get('name', None)

        if name == 'label':
            self.inLabelContent = True
            self.label = ''

        if name == 'description':
            self.inDescriptionContent = True
            self.description = ''

        if name == 'default':
            self.inDefaultContent = True
            self.param_default = ''

        if name == 'value':
            self.inValueContent = True
            self.value_tmp = ''

        if name == 'gisprompt':
            self.param_gisprompt = True
            self.param_age = attrs.get('age', None)
            self.param_element = attrs.get('element', None)
            self.param_prompt = attrs.get('prompt', None)

        if name == 'guisection':
            self.inGuisection = True
            self.guisection = ''

        if name == 'keywords':
            self.inKeywordsContent = True
            self.keyword = ''

        if name == 'keydesc':
            self.inKeyDesc = True
            self.key_desc = ''
            
        if name == 'item':
            if self.inKeyDesc:
                self.addKeyDesc = True

    # works with python 2.0, but is not SAX compliant
    def characters(self, ch):
        self.my_characters(ch)

    def my_characters(self, ch):
        if self.inLabelContent:
            self.label = self.label + ch
        if self.inDescriptionContent:
            self.description = self.description + ch
        if self.inDefaultContent:
            self.param_default = self.param_default + ch
        if self.inValueContent and not self.inDescriptionContent:
            # Beware: value_tmp will get anything outside of a <description>
            # so in this snippet:
            # <values>
            #   <value>
            #     <name> a </name>
            #     <description> a desc </description>
            #   </value>
            # </values>
            # 'a desc' will not be recorded anwhere; this unburdens further
            # handling of value sets to distinguish between those that do define
            # descriptions and those that do not.
            #
            # TODO: a set of flags to treat this case of a description sub-element
            self.value_tmp = self.value_tmp + ch
        if self.inGuisection:
            self.guisection = self.guisection + ch
        if self.inKeywordsContent:
            self.keyword = self.keyword + ch
        if self.addKeyDesc:
            self.key_desc = self.key_desc + ch

    def endElement(self, name):
        # If it's not a parameter element, ignore it
        if name == 'parameter':
            self.inParameter = False;
            # description -> label substitution is delegated to the client;
            # we deal in the parser only with getting interface-description
            # verbatim
            self.task.params.append({
                "name" : self.param_name,
                "type" : self.param_type,
                "required" : self.param_required,
                "multiple" : self.param_multiple,
                "label" : self.param_label,
                "description" : self.param_description,
                'gisprompt' : self.param_gisprompt,
                'age' : self.param_age,
                'element' :self.param_element,
                'prompt' : self.param_prompt,
                "guisection" : self.param_guisection,
                "default" : self.param_default,
                "values" : self.param_values,
                "values_desc" : self.param_values_description,
                "value" : '',
                "key_desc": self.param_key_desc})

            if self.inFirstParameter:
                self.task.firstParam = self.param_name # store name of first parameter
            self.inFirstParameter = False;

        if name == 'flag':
            self.inFlag = False;
            self.task.flags.append({
                "name" : self.flag_name,
                "description" : self.flag_description,
                "guisection" : self.flag_guisection } )

        if name == 'label':
            if self.inParameter:
                self.param_label = normalize_whitespace(self.label)
            else:
                self.task.label = normalize_whitespace(self.label)

        if name == 'description':
            if self.inValueContent:
                self.param_values_description.append(normalize_whitespace(self.description))
            elif self.inParameter:
                self.param_description = normalize_whitespace(self.description)
            elif self.inFlag:
                self.flag_description = normalize_whitespace(self.description)
            else:
                self.task.description = normalize_whitespace(self.description)
            self.inDescriptionContent = False

        if name == 'default':
            self.param_default = normalize_whitespace(self.param_default)
            self.inDefaultContent = False

        if name == 'value':
            v = normalize_whitespace(self.value_tmp)
            self.param_values.append(normalize_whitespace(self.value_tmp))
            self.inValueContent = False

        if name == 'guisection':
            if self.inParameter:
                self.param_guisection = normalize_whitespace(self.guisection)
            elif self.inFlag:
                self.flag_guisection = normalize_whitespace(self.guisection)
            self.inGuisection = False

        if name == 'keywords':
            for keyword in self.keyword.split(','):
                self.task.keywords.append (normalize_whitespace(keyword))
            self.inKeywordsContent = False

        if name == 'keydesc':
            self.param_key_desc = self.param_key_desc.split()
            self.inKeyDesc = False

        if name == 'item':
            if self.inKeyDesc:
                self.param_key_desc = normalize_whitespace(self.key_desc)
                self.addKeyDesc = False

class helpPanel(wx.html.HtmlWindow):
    """
    This panel holds the text from GRASS docs.

    GISBASE must be set in the environment to find the html docs dir.
    The SYNOPSIS section is skipped, since this Panel is supposed to
    be integrated into the cmdPanel and options are obvious there.
    """
    def __init__(self, grass_command = "index", text = None,
                 skip_description=False, *args, **kwargs):
        """ If grass_command is given, the corresponding HTML help file will
        be presented, with all links pointing to absolute paths of
        local files.

        If 'skip_description' is True, the HTML corresponding to
        SYNOPSIS will be skipped, thus only presenting the help file
        from the DESCRIPTION section onwards.

        If 'text' is given, it must be the HTML text to be presented in the Panel.
        """

        wx.html.HtmlWindow.__init__(self, *args, **kwargs)
        self.fspath = gisbase + "/docs/html/"

        self.SetStandardFonts ( size = 10 )
        self.SetBorders(10)
        wx.InitAllImageHandlers()

        if text is None:
            if skip_description:
                self.fillContentsFromFile ( self.fspath + grass_command + ".html",
                                            skip_description=skip_description )
                self.Ok = True
            else:
                ### FIXME: calling LoadPage() is strangely time-consuming (only first call)
                # self.LoadPage(self.fspath + grass_command + ".html")
                self.Ok = False
        else:
            self.SetPage( text )
            self.Ok = True

    def fillContentsFromFile( self, htmlFile, skip_description=True ):
        aLink = re.compile( r'(<a href="?)(.+\.html?["\s]*>)', re.IGNORECASE )
        imgLink = re.compile( r'(<img src="?)(.+\.[png|gif])', re.IGNORECASE )
        try:
            # contents = [ '<head><base href="%s"></head>' % self.fspath ]
            contents = []
            skip = False
            for l in file( htmlFile, "rb" ).readlines():
                if "DESCRIPTION" in l:
                    skip = False
                if not skip:
                    # do skip the options description if requested
                    if "SYNOPSIS" in l:
                        skip = skip_description
                    else:
                        # FIXME: find only first item
                        findALink = aLink.search( l )
                        if findALink is not None: 
                            contents.append( aLink.sub(findALink.group(1)+
                                                           self.fspath+findALink.group(2),l) )
                        findImgLink = imgLink.search( l )
                        if findImgLink is not None: 
                            contents.append( imgLink.sub(findImgLink.group(1)+
                                                         self.fspath+findImgLink.group(2),l) )
        
                        if findALink is None and findImgLink is None:
                            contents.append( l )
            self.SetPage( "".join( contents ) )
            self.Ok = True
        except: # The Manual file was not found
            self.Ok = False

class mainFrame(wx.Frame):
    """
    This is the Frame containing the dialog for options input.

    The dialog is organized in a notebook according to the guisections
    defined by each GRASS command.

    If run with a parent, it may Apply, Ok or Cancel; the latter two close the dialog.
    The former two trigger a callback.

    If run standalone, it will allow execution of the command.

    The command is checked and sent to the clipboard when clicking 'Copy'.
    """
    def __init__(self, parent, ID, task_description, get_dcmd=None, layer=None):

        self.get_dcmd = get_dcmd
        self.layer = layer
        self.task = task_description
        self.parent = parent

        # module name + keywords
        title = self.task.name
        try:
            title +=  " [" + ', '.join( self.task.keywords ) + "]"
        except ValueError:
            pass

        wx.Frame.__init__(self, parent=parent, id=ID, title=title,
                          pos=wx.DefaultPosition, style=wx.DEFAULT_FRAME_STYLE | wx.TAB_TRAVERSAL)

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

        # statusbar
        self.CreateStatusBar()

        # icon
        self.SetIcon(wx.Icon(os.path.join(globalvar.ETCDIR, 'grass_dialog.ico'), wx.BITMAP_TYPE_ICO))

        # menu
        #         menu = wx.Menu()
        #         menu.Append(wx.ID_ABOUT, _("&About GrassGUI"),
        #             _("Information about GrassGUI") )
        #         menu.Append(ID_ABOUT_COMMAND, _("&About %s") % self.task.name,
        #             _("Short descripton of GRASS command %s") % self.task.name)
        #         menu.AppendSeparator()
        #         menu.Append(wx.ID_EXIT, _("E&xit"), _("Terminate the program") )
        #         menuBar = wx.MenuBar()
        #         menuBar.Append(menu, "&File");
        #         self.SetMenuBar(menuBar)
        #wx.EVT_MENU(self, wx.ID_ABOUT, self.OnAbout)
        #wx.EVT_MENU(self, ID_ABOUT_COMMAND, self.OnAboutCommand)
        #wx.EVT_MENU(self, wx.ID_EXIT,  self.OnCancel)

        guisizer = wx.BoxSizer(wx.VERTICAL)

        # set apropriate output window
        if self.parent:
            self.standalone   = False
        else:
            self.standalone = True
            #             try:
            #                 self.goutput  = self.parent.GetLogWindow()
            #             except:
            #                 self.goutput  = None

        # logo+description
        topsizer = wx.BoxSizer(wx.HORIZONTAL)

        # GRASS logo
        self.logo = wx.StaticBitmap(parent=self.panel,
                                    bitmap=wx.Bitmap(name=os.path.join(imagepath,
                                                                       'grass_form.png'),
                                                     type=wx.BITMAP_TYPE_PNG))
        topsizer.Add (item=self.logo, proportion=0, border=3,
                      flag=wx.ALL | wx.ALIGN_CENTER_VERTICAL)
        guisizer.Add (item=topsizer, proportion=0, flag=wx.EXPAND)

        # notebooks
        self.notebookpanel = cmdPanel (parent=self.panel, task=self.task, standalone=self.standalone,
                                       mainFrame=self)
        ### add 'command output' tab also for dialog open from menu
        #         if self.standalone:
        self.goutput = self.notebookpanel.goutput
        self.notebookpanel.OnUpdateValues = self.updateValuesHook
        guisizer.Add (item=self.notebookpanel, proportion=1, flag=wx.EXPAND)

        # status bar
        status_text = _("Enter parameters for ") + self.task.name
        if self.notebookpanel.hasMain:
            # We have to wait for the notebookpanel to be filled in order
            # to know if there actually is a Main tab
            status_text += _(" (those in bold typeface are required)")
        try:
            self.task.getCmd()
            self.updateValuesHook()
        except ValueError:
            self.SetStatusText( status_text )

        # buttons
        btnsizer = wx.BoxSizer(orient=wx.HORIZONTAL)
        # cancel
        self.btn_cancel = wx.Button(parent=self.panel, id=wx.ID_CANCEL)
        self.btn_cancel.SetToolTipString(_("Cancel the command settings and ignore changes"))
        btnsizer.Add(item=self.btn_cancel, proportion=0, flag=wx.ALL | wx.ALIGN_CENTER, border=10)
        self.btn_cancel.Bind(wx.EVT_BUTTON, self.OnCancel)
        # help
        self.btn_help = wx.Button(parent=self.panel, id=wx.ID_HELP)
        self.btn_help.SetToolTipString(_("Show manual page of the command"))
        self.btn_help.Bind(wx.EVT_BUTTON, self.OnHelp)
        if self.get_dcmd is not None: # A callback has been set up
            btn_apply = wx.Button(parent=self.panel, id=wx.ID_APPLY)
            btn_ok = wx.Button(parent=self.panel, id=wx.ID_OK)
            btn_ok.SetDefault()

            btnsizer.Add(item=btn_apply, proportion=0,
                         flag=wx.ALL | wx.ALIGN_CENTER,
                         border=10)
            btnsizer.Add(item=btn_ok, proportion=0,
                         flag=wx.ALL | wx.ALIGN_CENTER,
                         border=10)

            btn_apply.Bind(wx.EVT_BUTTON, self.OnApply)
            btn_ok.Bind(wx.EVT_BUTTON, self.OnOK)
        else: # We're standalone
            # run
            self.btn_run = wx.Button(parent=self.panel, id=wx.ID_OK, label= _("&Run"))
            self.btn_run.SetToolTipString(_("Run the command"))
            self.btn_run.SetDefault()
            # abort
            self.btn_abort = wx.Button(parent=self.panel, id=wx.ID_STOP)
            self.btn_abort.SetToolTipString(_("Abort the running command"))
            self.btn_abort.Enable(False)
            # copy
            self.btn_clipboard = wx.Button(parent=self.panel, id=wx.ID_COPY)
            self.btn_clipboard.SetToolTipString(_("Copy the current command string to the clipboard"))

            btnsizer.Add(item=self.btn_abort, proportion=0,
                         flag=wx.ALL | wx.ALIGN_CENTER,
                         border=10)

            btnsizer.Add(item=self.btn_run, proportion=0,
                         flag=wx.ALL | wx.ALIGN_CENTER,
                         border=10)

            btnsizer.Add(item=self.btn_clipboard, proportion=0,
                         flag=wx.ALL | wx.ALIGN_CENTER,
                         border=10)

            self.btn_run.Bind(wx.EVT_BUTTON, self.OnRun)
            self.btn_abort.Bind(wx.EVT_BUTTON, self.OnAbort)
            self.btn_clipboard.Bind(wx.EVT_BUTTON, self.OnCopy)

        # add help button
        btnsizer.Add(item=self.btn_help, proportion=0, flag=wx.ALL | wx.ALIGN_CENTER, border=10)

        guisizer.Add(item=btnsizer, proportion=0, flag=wx.ALIGN_CENTER)

        if self.get_dcmd is None:
            # close dialog when command is terminated
            self.closebox = wx.CheckBox(parent=self.panel,
                                        label=_('Close dialog on finish'), style = wx.NO_BORDER)
            self.closebox.SetValue(UserSettings.Get(group='cmd', key='closeDlg', subkey='enabled'))
            guisizer.Add(item=self.closebox, proportion=0,
                         flag=wx.EXPAND | wx.LEFT | wx.RIGHT | wx.BOTTOM,
                         border=5)

        self.Bind(wx.EVT_CLOSE, self.OnCancel)

        #constrained_size = self.notebookpanel.GetSize()
        # 80 takes the tabbar into account
        #self.notebookpanel.SetSize( (constrained_size[0] + 25, constrained_size[1]) ) 
        #self.notebookpanel.Layout()

        #
        # put module description
        #
        if self.task.label != '':
            module_desc = self.task.label + os.linesep + self.task.description
        else:
            module_desc = self.task.description
        self.description = StaticWrapText (parent=self.panel,
                                           label=module_desc)
        topsizer.Add (item=self.description, proportion=1, border=5,
                      flag=wx.ALL | wx.ALIGN_CENTER_VERTICAL | wx.EXPAND)

        #
        # do layout
        #
        guisizer.SetSizeHints(self.panel)
        # called automatically by SetSizer()
        self.panel.SetAutoLayout(True) 
        self.panel.SetSizer(guisizer)
        guisizer.Fit(self.panel)

        sizeFrame = self.GetBestSize()
        self.SetMinSize(sizeFrame)
        self.SetSize((sizeFrame[0], sizeFrame[1] +
                      self.notebookpanel.constrained_size[1] -
                      self.notebookpanel.panelMinHeight))

        self.Layout()

    def updateValuesHook(self):
        """Update status bar data"""
        self.SetStatusText(' '.join(self.notebookpanel.createCmd(ignoreErrors = True)) )

    def OnOK(self, event):
        """OK button pressed"""
        cmd = self.OnApply(event)
        if cmd is not None and self.get_dcmd is not None:
            self.OnCancel(event)

    def OnApply(self, event):
        """Apply the command"""
        cmd = self.createCmd()

        if cmd is not None and self.get_dcmd is not None:
            # return d.* command to layer tree for rendering
            self.get_dcmd(cmd, self.layer, {"params": self.task.params, 
                                            "flags" :self.task.flags},
                          self)
            # echo d.* command to output console
            # self.parent.writeDCommand(cmd)

        return cmd

    def OnRun(self, event):
        """Run the command"""
        if len(self.goutput.GetListOfCmdThreads()) > 0:
            return

        cmd = self.createCmd()

        if cmd == [] or cmd == None:
            return

        # change page if needed
        if self.notebookpanel.notebook.GetSelection() != self.notebookpanel.goutput.pageid:
            self.notebookpanel.notebook.SetSelection(self.notebookpanel.goutput.pageid)

        if cmd[0][0:2] != "d.":
            # Send any non-display command to parent window (probably wxgui.py)
            # put to parents
            try:
                self.goutput.RunCmd(cmd)
            except AttributeError,e:
                print >> sys.stderr, "%s: Propably not running in wxgui.py session?" % (e)
                print >> sys.stderr, "parent window is: %s" % (str(self.parent))
            # Send any other command to the shell.
        else:
            gcmd.Command(cmd)

        # update buttons status
        for btn in (self.btn_run,
                    self.btn_cancel,
                    self.btn_clipboard,
                    self.btn_help):
            btn.Enable(False)
        self.btn_abort.Enable(True)

    def OnAbort(self, event):
        """Abort running command"""
        try:
            self.goutput.GetListOfCmdThreads()[0].abort()
        except IndexError:
            pass

    def OnCopy(self, event):
        """Copy the command"""
        cmddata = wx.TextDataObject()
        # list -> string
        cmdstring = ' '.join(self.createCmd(ignoreErrors=True))
        cmddata.SetText(cmdstring)
        if wx.TheClipboard.Open():
            wx.TheClipboard.UsePrimarySelection(True)
            wx.TheClipboard.SetData(cmddata)
            wx.TheClipboard.Close()
            self.SetStatusText( _("'%s' copied to clipboard") % \
                                    (cmdstring))

    def OnCancel(self, event):
        """Cancel button pressed"""
        self.MakeModal(False)
        if self.get_dcmd:
            self.Hide()
        else:
            self.Destroy()

    def OnHelp(self, event):
        """Show manual page (switch to the 'Manual' notebook page)"""
        if hasattr(self.notebookpanel, "manual_tab_id"):
            self.notebookpanel.notebook.SetSelection(self.notebookpanel.manual_tab_id)
            self.notebookpanel.OnPageChange(None)
            
        event.Skip()

    def OnAbout(self, event):
        """General 'about' information"""
        dlg = wx.MessageDialog(self, _("This is a sample program for\n"
                                       "GRASS command interface parsing\n"
                                       "and automatic GUI building.\n%s") %(__version__),
                               _("About wxPython GRASS GUI"), wx.OK | wx.ICON_INFORMATION)
        dlg.ShowModal()
        dlg.Destroy()

    def OnAboutCommand(self, event):
        """About command"""
        dlg = wx.MessageDialog(self,
            self.task.name+": "+self.task.description,
            "About " + self.task.name,
            wx.OK | wx.ICON_INFORMATION)
        dlg.ShowModal()
        dlg.Destroy()

    def createCmd(self, ignoreErrors = False):
        """Create command string (python list)"""
        return self.notebookpanel.createCmd(ignoreErrors=ignoreErrors)

class cmdPanel(wx.Panel):
    """
    A panel containing a notebook dividing in tabs the different guisections of the GRASS cmd.
    """
    def __init__( self, parent, task, standalone, mainFrame, *args, **kwargs ):
        wx.Panel.__init__( self, parent, *args, **kwargs )

        self.parent = mainFrame
        self.task = task
        fontsize = 10

        # Determine tab layout
        sections = []
        is_section = {}
        not_hidden = [ p for p in self.task.params + self.task.flags if not p.get( 'hidden','no' ) == 'yes' ]

        for task in not_hidden:
            if task.get( 'required','no' ) == 'yes':
                # All required go into Main, even if they had defined another guisection
                task['guisection'] = _( 'Required' )
            if task.get( 'guisection','' ) == '':
                # Undefined guisections end up into Options
                task['guisection'] = _( 'Optional' )
            if not is_section.has_key(task['guisection']):
                # We do it like this to keep the original order, except for Main which goes first
                is_section[task['guisection']] = 1
                sections.append( task['guisection'] )
            else:
                is_section[ task['guisection'] ] += 1
        del is_section

        # 'Required' tab goes first, 'Optional' as the last one
        for (newidx,content) in [ (0,_( 'Required' )), (len(sections)-1,_('Optional')) ]:
            if content in sections:
                idx = sections.index( content )
                sections[idx:idx+1] = []
                sections[newidx:newidx] =  [content]

        panelsizer = wx.BoxSizer(orient=wx.VERTICAL)

        # Build notebook
        nbStyle = globalvar.FNPageStyle
        self.notebook = FN.FlatNotebook( self, id=wx.ID_ANY, style=nbStyle)
        self.notebook.SetTabAreaColour(globalvar.FNPageColor)
        self.notebook.Bind(FN.EVT_FLATNOTEBOOK_PAGE_CHANGED, self.OnPageChange)

        tab = {}
        tabsizer = {}
        for section in sections:
            tab[section] = wx.ScrolledWindow( parent=self.notebook )
            tab[section].SetScrollRate(10,10)
            tabsizer[section] = wx.BoxSizer(orient=wx.VERTICAL)
            self.notebook.AddPage( tab[section], text=section )

        # are we running from command line?
        ### add 'command output' tab regardless standalone dialog
        if self.parent.get_dcmd is None:
            self.goutput = goutput.GMConsole(parent=self, margin=False,
                                             pageid=self.notebook.GetPageCount())
            self.outpage = self.notebook.AddPage(self.goutput, text=_("Command output") )
        else:
            self.goutput = None

        self.manual_tab = helpPanel(parent = self.notebook, grass_command = self.task.name)
        self.manual_tabsizer = wx.BoxSizer(wx.VERTICAL)
        self.notebook.AddPage(self.manual_tab, text=_("Manual"))
        self.manual_tab_id = self.notebook.GetPageCount() - 1

        self.notebook.SetSelection(0)

        panelsizer.Add(item=self.notebook, proportion=1, flag=wx.EXPAND )

        #
        # flags
        #
        text_style = wx.FONTWEIGHT_NORMAL
        visible_flags = [ f for f in self.task.flags if not f.get( 'hidden', 'no' ) == 'yes' ]
        for f in visible_flags:
            which_sizer = tabsizer[ f['guisection'] ]
            which_panel = tab[ f['guisection'] ]
            # if label is given -> label and description -> tooltip
            # otherwise description -> lavel
            if p.get('label','') != '':
                title = text_beautify( f['label'] )
                tooltip = text_beautify ( f['description'] )
            else:
                title = text_beautify( f['description'] )
                tooltip = None
            chk = wx.CheckBox(parent=which_panel, label = title, style = wx.NO_BORDER)
            if tooltip:
                chk.SetToolTipString(tooltip)
            if 'value' in f:
                chk.SetValue( f['value'] )
            # chk.SetFont(wx.Font(pointSize=fontsize, family=wx.FONTFAMILY_DEFAULT,
            #                    style=wx.NORMAL, weight=text_style))
            which_sizer.Add( item=chk, proportion=0,
                             flag=wx.EXPAND | wx.TOP | wx.LEFT | wx.RIGHT, border=5)
            f['wxId'] = chk.GetId()
            chk.Bind(wx.EVT_CHECKBOX, self.OnSetValue)
            if f['name'] in ('verbose', 'quiet'):
                chk.Bind(wx.EVT_CHECKBOX, self.OnVerbosity)
                vq = UserSettings.Get(group='cmd', key='verbosity', subkey='selection')
                if f['name'] == vq:
                    chk.SetValue(True)
                    f['value'] = True
            elif f['name'] == 'overwrite':
                chk.SetValue(UserSettings.Get(group='cmd', key='overwrite', subkey='enabled'))
                f['value'] = UserSettings.Get(group='cmd', key='overwrite', subkey='enabled')
                
        #
        # parameters
        #
        visible_params = [ p for p in self.task.params if not p.get( 'hidden', 'no' ) == 'yes' ]
        for p in visible_params:
            which_sizer = tabsizer[ p['guisection'] ]
            which_panel = tab[ p['guisection'] ]
            # if label is given -> label and description -> tooltip
            # otherwise description -> lavel
            if p.get('label','') != '':
                title = text_beautify( p['label'] )
                tooltip = text_beautify ( p['description'] )
            else:
                title = text_beautify( p['description'] )
                tooltip = None
            txt = None

            # text style (required -> bold)
            if p.get('required','no') == 'no':
                text_style = wx.FONTWEIGHT_NORMAL
            else:
                text_style = wx.FONTWEIGHT_BOLD

            # title expansion
            if p.get('multiple','no') == 'yes' and len( p.get('values','') ) == 0:
                title = _("[multiple]") + " " + title
                if p.get('value','') ==  '' :
                    p['value'] = p.get('default','')

            if ( len(p.get('values', []) ) > 0):
                valuelist=map( str, p.get('values',[]) )

                if p.get('multiple', 'no') == 'yes' and \
                        p.get('type', '') == 'string':
                    txt = wx.StaticBox (parent=which_panel, id=0, label=" " + title + ": ")
                    if len(valuelist) > 6:
                        hSizer=wx.StaticBoxSizer ( box=txt, orient=wx.VERTICAL )
                    else:
                        hSizer=wx.StaticBoxSizer ( box=txt, orient=wx.HORIZONTAL )
                    isEnabled = {}
                    # copy default values
                    if p['value'] == '':
                        p['value'] = p.get('default', '')
                        
                    for defval in p.get('value', '').split(','):
                        isEnabled[ defval ] = 'yes'
                        # for multi checkboxes, this is an array of all wx IDs
                        # for each individual checkbox
                        p[ 'wxId' ] = []
                    for val in valuelist:
                        chkbox = wx.CheckBox( parent=which_panel, label = text_beautify(val) )
                        p[ 'wxId' ].append( chkbox.GetId() )
                        if isEnabled.has_key(val):
                            chkbox.SetValue( True )
                        hSizer.Add( item=chkbox, proportion=0,
                                    flag=wx.ADJUST_MINSIZE | wx.ALL, border=1 )
                        chkbox.Bind(wx.EVT_CHECKBOX, self.OnCheckBoxMulti)
                    which_sizer.Add( item=hSizer, proportion=0,
                                     flag=wx.EXPAND | wx.TOP | wx.RIGHT | wx.LEFT, border=5 )
                else:
                    if len(valuelist) == 1: # -> textctrl
                        txt = wx.StaticText(parent=which_panel,
                                            label = "%s. %s %s" % (title, _('Valid range'),
                                                                   str(valuelist[0]) + ':'))
                        which_sizer.Add(item=txt, proportion=0,
                                        flag=wx.ADJUST_MINSIZE | wx.TOP | wx.RIGHT | wx.LEFT, border=5)

                        if p.get('type','') == 'integer' and \
                                p.get('multiple','no') == 'no':

                            # for multiple integers use textctrl instead of spinsctrl
                            try:
                                minValue, maxValue = map(int, valuelist[0].split('-'))
                            except ValueError:
                                minValue = -1e6
                                maxValue = 1e6
                            txt2 = wx.SpinCtrl(parent=which_panel, id=wx.ID_ANY, size=globalvar.DIALOG_SPIN_SIZE,
                                               min=minValue, max=maxValue)
                        else:
                            txt2 = wx.TextCtrl(parent=which_panel, value = p.get('default',''),
                                               size=globalvar.DIALOG_TEXTCTRL_SIZE)
                        if p.get('value','') != '':
                            txt2.SetValue(p['value']) # parameter previously set
                        which_sizer.Add(item=txt2, proportion=0,
                                        flag=wx.ADJUST_MINSIZE | wx.BOTTOM | wx.LEFT, border=5)

                        p['wxId'] = txt2.GetId()
                        txt2.Bind(wx.EVT_TEXT, self.OnSetValue)
                    else:
                        # list of values (combo)
                        txt = wx.StaticText(parent=which_panel, label = title + ':' )
                        which_sizer.Add(item=txt, proportion=0,
                                        flag=wx.ADJUST_MINSIZE | wx.TOP | wx.RIGHT | wx.LEFT, border=5)
                        cb = wx.ComboBox(parent=which_panel, id=wx.ID_ANY, value=p.get('default',''),
                                         size=globalvar.DIALOG_COMBOBOX_SIZE,
                                         choices=valuelist, style=wx.CB_DROPDOWN)
                        if p.get('value','') != '':
                            cb.SetValue(p['value']) # parameter previously set
                        which_sizer.Add( item=cb, proportion=0,
                                         flag=wx.ADJUST_MINSIZE | wx.BOTTOM | wx.LEFT, border=5)
                        p['wxId'] = cb.GetId()
                        cb.Bind( wx.EVT_COMBOBOX, self.OnSetValue)

            # text entry
            if (p.get('type','string') in ('string','integer','float')
                and len(p.get('values',[])) == 0
                and p.get('gisprompt',False) == False
                and p.get('prompt','') != 'color'):

                txt = wx.StaticText(parent=which_panel, label = title + ':' )
                which_sizer.Add(item=txt, proportion=0,
                                flag=wx.RIGHT | wx.LEFT | wx.TOP | wx.EXPAND, border=5)

                if p.get('multiple','yes') == 'yes' or \
                        p.get('type', 'string') in ('string', 'float') or \
                        len(p.get('key_desc', [])) > 1:
                    txt3 = wx.TextCtrl(parent=which_panel, value = p.get('default',''),
                                       size=globalvar.DIALOG_TEXTCTRL_SIZE)
                    if p.get('value','') != '':
                        txt3.SetValue(str(p['value'])) # parameter previously set

                    txt3.Bind(wx.EVT_TEXT, self.OnSetValue)
                else:
                    minValue = -1e9
                    maxValue = 1e9
                    txt3 = wx.SpinCtrl(parent=which_panel, value=p.get('default',''),
                                       size=globalvar.DIALOG_SPIN_SIZE,
                                       min=minValue, max=maxValue)
                    if p.get('value','') != '':
                        txt3.SetValue(int(p['value'])) # parameter previously set

                    txt3.Bind(wx.EVT_SPINCTRL, self.OnSetValue)
                    txt3.Bind(wx.EVT_TEXT, self.OnSetValue)
                    
                which_sizer.Add(item=txt3, proportion=0, flag=wx.BOTTOM | wx.LEFT, border=5)
                p['wxId'] = txt3.GetId()

            if p.get('type','string') == 'string' and p.get('gisprompt',False) == True:
                txt = wx.StaticText(parent=which_panel, label = title + ':')
                which_sizer.Add(item=txt, proportion=0,
                                flag=wx.ADJUST_MINSIZE | wx.RIGHT | wx.LEFT | wx.TOP, border=5)
                # element selection tree combobox (maps, icons, regions, etc.)
                if p.get('prompt','') != 'color' and p.get('element', '') != 'file':
                    if p.get('multiple','no') == 'yes':
                        multiple = True
                    else:
                        multiple = False
                    if p.get('age','') == 'new':
                        mapsets = [grassenv.GetGRASSVariable('MAPSET'),]
                    else:
                        mapsets = None

                    selection = gselect.Select(parent=which_panel, id=wx.ID_ANY, size=globalvar.DIALOG_GSELECT_SIZE,
                                               type=p.get('element',''), multiple=multiple, mapsets=mapsets)
                    if p.get('value','') != '':
                        selection.SetValue(p['value']) # parameter previously set

                    which_sizer.Add(item=selection, proportion=0,
                                    flag=wx.ADJUST_MINSIZE| wx.BOTTOM | wx.LEFT | wx.RIGHT, border=5)
                    # A select.Select is a combobox with two children: a textctl and a popupwindow;
                    # we target the textctl here
                    p['wxId'] = selection.GetChildren()[0].GetId()
                    selection.Bind(wx.EVT_TEXT, self.OnSetValue)
                # color entry
                elif p.get('prompt','') == 'color':
                    # Heuristic way of finding whether transparent is allowed
                    handle_transparency =  'none' in title
                    default_color = (200,200,200)
                    label_color = _("Select Color")
                    if p.get('default','') != '':
                        default_color, label_color = color_resolve( p['default'] )
                    if p.get('value','') != '': # parameter previously set
                        default_color, label_color = color_resolve( p['value'] )
                    if handle_transparency:
                        this_sizer = wx.BoxSizer(orient=wx.HORIZONTAL )
                    else:
                        this_sizer = which_sizer
                    btn_colour = csel.ColourSelect(parent=which_panel, id=wx.ID_ANY,
                                                   label=label_color, colour=default_color,
                                                   pos=wx.DefaultPosition, size=(150,-1) )
                    this_sizer.Add(item=btn_colour, proportion=0,
                                   flag=wx.ADJUST_MINSIZE | wx.BOTTOM | wx.LEFT, border=5)
                    # For color selectors, this is a two-member array, holding the IDs of
                    # the selector proper and either a "transparent" button or None
                    p['wxId'] = [btn_colour.GetId(),]
                    btn_colour.Bind(csel.EVT_COLOURSELECT,  self.OnColorChange )
                    if handle_transparency:
                        none_check = wx.CheckBox(which_panel, wx.ID_ANY, _("Transparent") )
                        if p.get('value','') != '' and p.get('value',[''])[0] == "none":
                            none_check.SetValue(True)
                        else:
                            none_check.SetValue(False)
                        # none_check.SetFont( wx.Font( fontsize, wx.FONTFAMILY_DEFAULT, wx.NORMAL, text_style, 0, ''))
                        this_sizer.Add(item=none_check, proportion=0,
                                       flag=wx.ADJUST_MINSIZE | wx.LEFT | wx.RIGHT | wx.TOP, border=5)
                        which_sizer.Add( this_sizer )
                        none_check.Bind(wx.EVT_CHECKBOX, self.OnColorChange)
                        p['wxId'].append( none_check.GetId() )
                    else:
                        p['wxId'].append(None)
                # file selector
                elif p.get('prompt','') != 'color' and p.get('element', '') == 'file':
                    fbb = filebrowse.FileBrowseButton(parent=which_panel, id=wx.ID_ANY, 
                                                      size=globalvar.DIALOG_GSELECT_SIZE, labelText='',
                                                      dialogTitle=_('Choose %s') % \
                                                          p.get('description',_('File')),
                                                      buttonText=_('Browse'),
                                                      startDirectory=os.getcwd(), fileMode=0,
                                                      changeCallback=self.OnSetValue)
                    if p.get('value','') != '':
                        fbb.SetValue(p['value']) # parameter previously set
                    which_sizer.Add(item=fbb, proportion=0,
                                    flag=wx.ADJUST_MINSIZE | wx.LEFT | wx.TOP | wx.RIGHT, border=-3)
                    # A file browse button is a combobox with two children:
                    # a textctl and a button;
                    # we have to target the button here
                    p['wxId'] = fbb.GetChildren()[1].GetId()

            if txt is not None:
                # txt.SetFont( wx.Font( fontsize, wx.FONTFAMILY_DEFAULT, wx.NORMAL, text_style, 0, ''))
                # create tooltip if given
                if len(p['values_desc']) > 0:
                    if tooltip:
                        tooltip += 2 * os.linesep
                    else:
                        tooltip = ''
                    if len(p['values']) == len(p['values_desc']):
                        for i in range(len(p['values'])):
                            tooltip += p['values'][i] + ': ' + p['values_desc'][i] + os.linesep
                    tooltip.strip(os.linesep)
                if tooltip:
                    txt.SetToolTipString(tooltip)

	#
	# determine panel size
	#
        maxsizes = (0,0)
        for section in sections:
            # tabsizer[section].SetSizeHints( tab[section] )
            #tab[section].SetAutoLayout(True)
            tab[section].SetSizer( tabsizer[section] )
            tabsizer[section].Fit( tab[section] )
            tab[section].Layout()
            minsecsizes = tabsizer[section].GetSize()
            maxsizes = map( lambda x: max( maxsizes[x], minsecsizes[x] ), (0,1) )

        # TODO: be less arbitrary with these 600
        self.panelMinHeight = 100
        self.constrained_size = (min(600, maxsizes[0]) + 25, min(400, maxsizes[1]) + 25)
        for section in sections:
            tab[section].SetMinSize( (self.constrained_size[0], self.panelMinHeight) )
            # tab[section].SetMinSize( constrained_size )

        if self.manual_tab.Ok:
            self.manual_tab.SetMinSize( (self.constrained_size[0], self.panelMinHeight) )
            # manual_tab.SetMinSize( constrained_size )

        self.SetSizer( panelsizer )
        panelsizer.Fit(self.notebook)

        self.hasMain = tab.has_key( _('Required') ) # publish, to enclosing Frame for instance

    def OnVerbosity(self, event):
        """Verbosity level changed"""
        verbose = self.FindWindowById(self.task.get_flag('verbose')['wxId'])
        quiet = self.FindWindowById(self.task.get_flag('quiet')['wxId'])
        if event.IsChecked():
            if event.GetId() == verbose.GetId():
                if quiet.IsChecked():
                    quiet.SetValue(False)
                    self.task.get_flag('quiet')['value'] = False
            else:
                if verbose.IsChecked():
                    verbose.SetValue(False)
                    self.task.get_flag('verbose')['value'] = False

        event.Skip()

    def OnPageChange(self, event):
        if not event:
            sel = self.notebook.GetSelection()
        else:
            sel = event.GetSelection()

        if hasattr(self, "manual_tab_id") and \
                sel == self.manual_tab_id:
            # calling LoadPage() is strangely time-consuming (only first call)
            # FIXME: move to helpPage.__init__()
            if not self.manual_tab.Ok:
                wx.Yield()
                self.manual_tab.LoadPage(self.manual_tab.fspath + self.task.name + ".html")
                self.manual_tab.Ok = True

        self.Layout()

    def OnColorChange( self, event ):
        myId = event.GetId()
        for p in self.task.params:
            if 'wxId' in p and type( p['wxId'] ) == type( [] ) and myId in p['wxId']:
                has_button = p['wxId'][1] is not None
                if has_button and wx.FindWindowById( p['wxId'][1] ).GetValue() == True:
                    p[ 'value' ] = 'none'
                else:
                    colorchooser = wx.FindWindowById( p['wxId'][0] )
                    new_color = colorchooser.GetValue()[:]
                    # This is weird: new_color is a 4-tuple and new_color[:] is a 3-tuple
                    # under wx2.8.1
                    new_label = rgb2str.get( new_color, ':'.join(map(str,new_color)) )
                    colorchooser.SetLabel( new_label )
                    colorchooser.SetColour( new_color )
                    colorchooser.Refresh()
                    p[ 'value' ] = colorchooser.GetLabel()
        self.OnUpdateValues()

    def OnUpdateValues(self):
        """
        If we were part of a richer interface, report back the current command being built.

        This method should be set by the parent of this panel if needed. It's a hook, actually.
        Beware of what is 'self' in the method def, though. It will be called with no arguments.
        """
        pass

    def OnCheckBoxMulti(self, event):
        """
        Fill the values as a ','-separated string according to current status of the checkboxes.
        """
        me = event.GetId()
        theParam = None
        for p in self.task.params:
            if 'wxId' in p and type( p['wxId'] ) == type( [] ) and me in p['wxId']:
                theParam = p
                myIndex = p['wxId'].index( me )

        # Unpack current value list
        currentValues = {}
        for isThere in theParam.get('value', '').split(','):
            currentValues[isThere] = 1
        theValue = theParam['values'][myIndex]

        if event.Checked():
            currentValues[ theValue ] = 1
        else:
            del currentValues[ theValue ]

        # Keep the original order, so that some defaults may be recovered
        currentValueList = [] 
        for v in theParam['values']:
            if currentValues.has_key(v):
                currentValueList.append( v )

        # Pack it back
        theParam['value'] = ','.join( currentValueList )

        self.OnUpdateValues()

    def OnSetValue(self, event):
        """
        Retrieve the widget value and set the task value field accordingly.

        Use for widgets that have a proper GetValue() method, i.e. not for selectors.
        """
        myId = event.GetId()
        me = wx.FindWindowById( myId )
        for porf in self.task.params + self.task.flags:
            if 'wxId' in porf and type( porf[ 'wxId' ] ) == type( 1 ) and porf['wxId'] == myId:
                porf[ 'value' ] = me.GetValue()

        self.OnUpdateValues()

    def createCmd( self, ignoreErrors = False ):
        """
        Produce a command line string (list) or feeding into GRASS.

        If ignoreErrors==True then it will return whatever has been
        built so far, even though it would not be a correct command
        for GRASS.
        """
        try:
            cmd = self.task.getCmd( ignoreErrors=ignoreErrors )
        except ValueError, err:
            dlg = wx.MessageDialog(self, str(err), _("Error"), wx.OK | wx.ICON_ERROR)
            dlg.ShowModal()
            dlg.Destroy()
            cmd = None

        return cmd
    

def getInterfaceDescription( cmd ):
    """
    Returns the XML description for the GRASS cmd.

    The DTD must be located in $GISBASE/etc/grass-interface.dtd,
    otherwise the parser will not succeed.

    Note: 'cmd' is given as string
    """
    cmdout = os.popen(cmd + r' --interface-description', "r").read()
    if not len(cmdout) > 0 :
        raise IOError, _("Unable to fetch interface description for command '%s'.") % cmd
    p = re.compile( '(grass-interface.dtd)')
    p.search( cmdout )
    cmdout = p.sub(globalvar.ETCDIR + r'/grass-interface.dtd', cmdout)
    return cmdout

class GrassGUIApp(wx.App):
    """
    Stand-alone GRASS command GUI
    """
    def __init__(self, grass_task):
        self.grass_task = grass_task
        wx.App.__init__(self, False)

    def OnInit(self):
        self.mf = mainFrame(parent=None, ID=wx.ID_ANY, task_description=self.grass_task)
        self.mf.Show(True)
        self.SetTopWindow(self.mf)
        # print >> sys.stderr, time.time() - start
        return True

class GUI:
    """
    Parses GRASS commands when module is imported and used
    from Layer Manager.
    """
    def __init__(self, parent=-1):
        self.parent = parent
        self.grass_task = None

    def ParseCommand(self, cmd, gmpath=None, completed=None, parentframe=-1, show=True, modal=False):
        """
        Parse command

        Note: cmd is given as list

        If command is given with options, return validated cmd list:
        * add key name for first parameter if not given
        * change mapname to mapname@mapset
        """
        start = time.time()
        dcmd_params = {}
        if completed == None:
            get_dcmd = None
            layer = None
            dcmd_params = None
        else:
            get_dcmd = completed[0]
            layer = completed[1]
            if completed[2]:
                dcmd_params.update(completed[2])

        if parentframe != -1:
            self.parent = parentframe
        else:
            self.parent = None

        # parse the interface decription
        self.grass_task = grassTask()
        handler = processTask(self.grass_task)
        xml.sax.parseString( getInterfaceDescription(cmd[0]), handler )

        # if layer parameters previously set, re-insert them into dialog
        if completed is not None:
            if 'params' in dcmd_params:
                self.grass_task.params = dcmd_params['params']
            if 'flags' in dcmd_params:
                self.grass_task.flags = dcmd_params['flags']

        # update parameters if needed && validate command
        if len(cmd) > 1:
            i = 0
            cmd_validated = [cmd[0]]
            for option in cmd[1:]:
                if option[0] == '-': # flag
                    self.grass_task.set_flag(option[1], True)
                    cmd_validated.append(option)
                else: # parameter
                    try:
                        key, value = option.split('=', 1)
                    except:
                        if i == 0: # add key name of first parameter if not given
                            key = self.grass_task.firstParam
                            value = option
                        else:
                            raise ValueError, _("Unable to parse command %s") % ' '.join(cmd)

                    if self.grass_task.get_param(key)['element'] in ['cell', 'vector']:
                        # mapname -> mapname@mapset
                        if '@' not in value:
                            value = value + '@' + grassenv.GetGRASSVariable('MAPSET')
                    self.grass_task.set_param(key, value)
                    cmd_validated.append(key + '=' + value)
                    i = i + 1

            # update original command list
            cmd = cmd_validated

        self.mf = mainFrame(parent=self.parent, ID=wx.ID_ANY,
                            task_description=self.grass_task,
                            get_dcmd=get_dcmd, layer=layer)
        
        if get_dcmd is not None:
            # update only propwin reference
            get_dcmd(dcmd=None, layer=layer, params=None,
                     propwin=self.mf)
        
        if show:
            self.mf.Show(show)
            self.mf.MakeModal(modal)
        else:
            self.mf.OnApply(None)
        
        # print >> sys.stderr, time.time() - start
        return cmd

    def GetCommandInputMapParamKey(self, cmd):
        """Get parameter key for input raster/vector map
        
        @param cmd module name
        
        @return parameter key
        @return None on failure
        """
        # parse the interface decription
        if not self.grass_task:
            self.grass_task = grassTask()
            handler = processTask(self.grass_task)
            xml.sax.parseString(getInterfaceDescription(cmd), handler)

            for p in self.grass_task.params:
                if p.get('name', '') in ('input', 'map'):
                    age = p.get('age', '')
                    prompt = p.get('prompt', '')
                    element = p.get('element', '') 
                    if age == 'old' and \
                            element in ('cell', 'grid3', 'vector') and \
                            prompt in ('raster', '3d-raster', 'vector'):
                        return p.get('name', None)
        return None

class StaticWrapText(wx.StaticText):
    """
    A Static Text field that wraps its text to fit its width, enlarging its height if necessary.
    """
    def __init__(self, parent, id=wx.ID_ANY, label=u'', *args, **kwds):
        self.originalLabel = label
        wx.StaticText.__init__(self, parent, id, u'', *args, **kwds)
        self.SetLabel(label)
        self.Bind(wx.EVT_SIZE, self.onResize)
    
    def SetLabel(self, label):
        self.originalLabel = label
        self.wrappedSize = None
        #self.onResize(None)
        
    def onResize(self, event):
        if not getattr(self, "resizing", False):
            self.resizing = True
            newSize = self.GetSize()
            if self.wrappedSize != newSize:
                wx.StaticText.SetLabel(self, self.originalLabel)
                self.Wrap(newSize.width)
                self.wrappedSize = self.GetMinSize()

                self.SetSize(self.wrappedSize)
            del self.resizing

if __name__ == "__main__":

    if len(sys.argv) == 1:
        print _("usage: %s <grass command>") % sys.argv[0]
        sys.exit()
    if sys.argv[1] != 'test':
        q=wx.LogNull()
        GrassGUIApp( grassTask( sys.argv[1] ) ).MainLoop()
    else: #Test
        # Test grassTask from within a GRASS session
        if os.getenv("GISBASE") is not None:
            task = grassTask( "d.vect" )
            task.get_param('map')['value'] = "map_name"
            task.get_flag('v')['value'] = True
            task.get_param('layer')['value'] = 1
            task.get_param('bcolor')['value'] = "red"
            assert ' '.join( task.getCmd() ) == "d.vect -v map=map_name layer=1 bcolor=red"
        # Test interface building with handmade grassTask,
        # possibly outside of a GRASS session.
        task = grassTask()
        task.name = "TestTask"
        task.description = "This is an artificial grassTask() object intended for testing purposes."
        task.keywords = ["grass","test","task"]
        task.params = [
            {
            "name" : "text",
            "description" : "Descriptions go into tooltips if labels are present, like this one",
            "label" : "Enter some text",
            },{
            "name" : "hidden_text",
            "description" : "This text should not appear in the form",
            "hidden" : "yes"
            },{
            "name" : "text_default",
            "description" : "Enter text to override the default",
            "default" : "default text"
            },{
            "name" : "text_prefilled",
            "description" : "You should see a friendly welcome message here",
            "value" : "hello, world"
            },{
            "name" : "plain_color",
            "description" : "This is a plain color, and it is a compulsory parameter",
            "required" : "yes",
            "gisprompt" : True,
            "prompt" : "color"
            },{
            "name" : "transparent_color",
            "description" : "This color becomes transparent when set to none",
            "guisection" : "tab",
            "gisprompt" : True,
            "prompt" : "color"
            },{
            "name" : "multi",
            "description" : "A multiple selection",
            'default': u'red,green,blue',
            'gisprompt': False,
            'guisection': 'tab',
            'multiple': u'yes',
            'type': u'string',
            'value': '',
            'values': ['red', 'green', u'yellow', u'blue', u'purple', u'other']
            },{
            "name" : "single",
            "description" : "A single multiple-choice selection",
            'values': ['red', 'green', u'yellow', u'blue', u'purple', u'other'],
            "guisection" : "tab"
            },{
            "name" : "large_multi",
            "description" : "A large multiple selection",
            "gisprompt" : False,
            "multiple" : "yes",
            # values must be an array of strings
            "values" : str2rgb.keys() + map( str, str2rgb.values() )
            },{
            "name" : "a_file",
            "description" : "A file selector",
            "gisprompt" : True,
            "element" : "file"
            }
            ]
        task.flags = [
            {
            "name" : "a",
            "description" : "Some flag, will appear in Main since it is required",
            "required" : "yes"
            },{
            "name" : "b",
            "description" : "pre-filled flag, will appear in options since it is not required",
            "value" : True
            },{
            "name" : "hidden_flag",
            "description" : "hidden flag, should not be changeable",
            "hidden" : "yes",
            "value" : True
            }
            ]
        q=wx.LogNull()
        GrassGUIApp( task ).MainLoop()