/[thuban]/trunk/thuban/Thuban/UI/classifier.py

Diff of /trunk/thuban/Thuban/UI/classifier.py

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-revision 377 by jonathan,
Tue Jan 28 12:09:56 2003 UTC
+revision 835 by bh,
Tue May  6 15:52:41 2003 UTC
 Line 1
- # Copyright (c) 2001 by Intevation GmbH
+ # Copyright (c) 2001, 2003 by Intevation GmbH
  # Authors:
  # Jonathan Coles <[email protected]>
  #
 Line 11 
 __version__ = "$Revision$"
  import copy
+ from Thuban.Model.table import FIELDTYPE_INT, FIELDTYPE_DOUBLE, \
+      FIELDTYPE_STRING
  from wxPython.wx import *
  from wxPython.grid import *
  from Thuban import _
+ from Thuban.UI.common import *
+ from Thuban.Model.classification import *
+ from Thuban.Model.color import Color
+ from Thuban.Model.layer import Layer, SHAPETYPE_ARC, SHAPETYPE_POLYGON, SHAPETYPE_POINT
+ from Thuban.UI.classgen import ClassGenDialog, ClassGenerator
+ from dialogs import NonModalDialog
- ID_PROPERTY_SELECT = 4010
  ID_CLASS_TABLE = 40011
- ID_CLASSIFY_OK = 4001
- ID_CLASSIFY_CANCEL = 4002
+ # table columns
+ COL_VISIBLE = 0
+ COL_SYMBOL  = 1
+ COL_VALUE   = 2
+ COL_LABEL   = 3
+ NUM_COLS    = 4
+ # indices into the client data lists in Classifier.fields
+ FIELD_CLASS = 0
+ FIELD_TYPE = 1
+ FIELD_NAME = 2
+ #
+ # this is a silly work around to ensure that the table that is
+ # passed into SetTable is the same that is returned by GetTable
+ #
+ import weakref
+ class ClassGrid(wxGrid):
+     def __init__(self, parent, classifier):
+         """Constructor.
+         parent -- the parent window
+         clazz -- the working classification that this grid should
+                  use for display.
+         """
+         wxGrid.__init__(self, parent, ID_CLASS_TABLE, style = 0)
+         self.classifier = classifier
+         self.currentSelection = []
+         EVT_GRID_CELL_LEFT_DCLICK(self, self._OnCellDClick)
+         EVT_GRID_RANGE_SELECT(self, self._OnSelectedRange)
+         EVT_GRID_SELECT_CELL(self, self._OnSelectedCell)
+         EVT_GRID_COL_SIZE(self, self._OnCellResize)
+         EVT_GRID_ROW_SIZE(self, self._OnCellResize)
+     #def GetCellAttr(self, row, col):
+         #print "GetCellAttr ", row, col
+         #wxGrid.GetCellAttr(self, row, col)
+     def CreateTable(self, clazz, shapeType, group = None):
+         assert isinstance(clazz, Classification)
+         table = self.GetTable()
+         if table is None:
+             w = self.GetDefaultColSize() * NUM_COLS \
+                 + self.GetDefaultRowLabelSize()
+             h = self.GetDefaultRowSize() * 4 \
+                 + self.GetDefaultColLabelSize()
+             self.SetDimensions(-1, -1, w, h)
+             self.SetSizeHints(w, h, -1, -1)
+             table = ClassTable(self)
+             self.SetTable(table, True)
+         self.SetSelectionMode(wxGrid.wxGridSelectRows)
+         self.ClearSelection()
+         table.Reset(clazz, shapeType, group)
+     def GetCurrentSelection(self):
+         """Return the currently highlighted rows as an increasing list
+            of row numbers."""
+         sel = copy.copy(self.currentSelection)
+         sel.sort()
+         return sel
+     def GetSelectedRows(self):
+         return self.GetCurrentSelection()
+     #def SetCellRenderer(self, row, col, renderer):
+         #raise ValueError(_("Must not allow setting of renderer in ClassGrid!"))
+     #
+     # [Set|Get]Table is taken from http://wiki.wxpython.org
+     # they are needed as a work around to ensure that the table
+     # that is passed to SetTable is the one that is returned
+     # by GetTable.
+     #
+     def SetTable(self, object, *attributes):
+         self.tableRef = weakref.ref(object)
+         return wxGrid.SetTable(self, object, *attributes)
+     def GetTable(self):
+         try:
+             return self.tableRef()
+         except:
+             return None
+     def DeleteSelectedRows(self):
+         """Deletes all highlighted rows.
+         If only one row is highlighted then after it is deleted the
+         row that was below the deleted row is highlighted."""
+         sel = self.GetCurrentSelection()
+         # nothing to do
+         if len(sel) == 0: return
+         # if only one thing is selected check if it is the default
+         # data row, because we can't remove that
+         if len(sel) == 1:
+             #group = self.GetTable().GetValueAsCustom(sel[0], COL_SYMBOL, None)
+             group = self.GetTable().GetClassGroup(sel[0])
+             if isinstance(group, ClassGroupDefault):
+                 wxMessageDialog(self,
+                                 "The Default group cannot be removed.",
+                                 style = wxOK | wxICON_EXCLAMATION).ShowModal()
+                 return
+         self.ClearSelection()
+         # we need to remove things from the bottom up so we don't
+         # change the indexes of rows that will be deleted next
+         sel.reverse()
+         #
+         # actually remove the rows
+         #
+         table = self.GetTable()
+         for row in sel:
+             table.DeleteRows(row)
+         #
+         # if there was only one row selected highlight the row
+         # that was directly below it, or move up one if the
+         # deleted row was the last row.
+         #
+         if len(sel) == 1:
+             r = sel[0]
+             if r > self.GetNumberRows() - 1:
+                 r = self.GetNumberRows() - 1
+             self.SelectRow(r)
+     def SelectGroup(self, group, makeVisible = True):
+         if group is None: return
+         assert isinstance(group, ClassGroup)
+         table = self.GetTable()
+         assert table is not None
+         for i in range(table.GetNumberRows()):
+             g = table.GetClassGroup(i)
+             if g is group:
+                 self.SelectRow(i)
+                 if makeVisible:
+                     self.MakeCellVisible(i, 0)
+                 break
+ #
+ # XXX: This isn't working, and there is no way to deselect rows wxPython!
+ #
+ #   def DeselectRow(self, row):
+ #       self.ProcessEvent(
+ #           wxGridRangeSelectEvent(-1,
+ #                                  wxEVT_GRID_RANGE_SELECT,
+ #                                  self,
+ #                                  (row, row), (row, row),
+ #                                  sel = False))
+     def _OnCellDClick(self, event):
+         """Handle a double click on a cell."""
+         r = event.GetRow()
+         c = event.GetCol()
+         if c == COL_SYMBOL:
+             self.classifier.EditSymbol(r)
+         else:
+             event.Skip()
+     #
+     # _OnSelectedRange() and _OnSelectedCell() were borrowed
+     # from http://wiki.wxpython.org to keep track of which
+     # cells are currently highlighted
+     #
+     def _OnSelectedRange(self, event):
+         """Internal update to the selection tracking list"""
+         if event.Selecting():
+             for index in range( event.GetTopRow(), event.GetBottomRow()+1):
+                 if index not in self.currentSelection:
+                     self.currentSelection.append( index )
+         else:
+             for index in range( event.GetTopRow(), event.GetBottomRow()+1):
+                 while index in self.currentSelection:
+                     self.currentSelection.remove( index )
+         #self.ConfigureForSelection()
+         event.Skip()
+     def _OnSelectedCell( self, event ):
+         """Internal update to the selection tracking list"""
+         self.currentSelection = [ event.GetRow() ]
+         #self.ConfigureForSelection()
+         event.Skip()
+     def _OnCellResize(self, event):
+         self.FitInside()
  class ClassTable(wxPyGridTableBase):
+     """Represents the underlying data structure for the grid."""
+     __col_labels = [_("Visible"), _("Symbol"), _("Value"), _("Label")]
+     def __init__(self, view = None):
+     #def __init__(self, clazz, shapeType, view = None):
+         """Constructor.
+         shapeType -- the type of shape that the layer uses
+         view -- a wxGrid object that uses this class for its table
+         """
-     def __init__(self, clinfo):
          wxPyGridTableBase.__init__(self)
-         self.clinfo = copy.deepcopy(clinfo)
-         self.tdata = []
+         assert len(ClassTable.__col_labels) == NUM_COLS
+         self.clazz = None
+         self.__colAttr = {}
+         self.SetView(view)
-         for value, data in self.clinfo.points.items():
+     def Reset(self, clazz, shapeType, group = None):
-             self.tdata.append([data, value])
+         """Reset the table with the given data.
-         for range in self.clinfo.ranges:
+         This is necessary because wxWindows does not allow a grid's
-             self.tdata.append([range[2], '%s-%s' % range[0], range[1]])
+         table to change once it has been intially set and so we
+         need a way of modifying the data.
-         self.SetColLabelValue(1, "Data Values")
+         clazz -- the working classification that this table should
+                  use for display. This may be different from the
+                  classification in the layer.
+         shapeType -- the type of shape that the layer uses
+         """
+         assert isinstance(clazz, Classification)
+         self.GetView().BeginBatch()
+         self.fieldType = clazz.GetFieldType()
+         self.shapeType = shapeType
+         self.SetClassification(clazz, group)
+         self.__Modified(-1)
+         self.__colAttr = {}
+         attr = wxGridCellAttr()
+         attr.SetEditor(wxGridCellBoolEditor())
+         attr.SetRenderer(wxGridCellBoolRenderer())
+         attr.SetAlignment(wxALIGN_CENTER, wxALIGN_CENTER)
+         self.__colAttr[COL_VISIBLE] = attr
+         attr = wxGridCellAttr()
+         attr.SetRenderer(ClassRenderer(self.shapeType))
+         attr.SetReadOnly()
+         self.__colAttr[COL_SYMBOL] = attr
+         self.GetView().EndBatch()
+         self.GetView().FitInside()
+     def GetClassification(self):
+         return self.clazz
+     def SetClassification(self, clazz, group = None):
+         self.GetView().BeginBatch()
+         old_len = self.GetNumberRows()
+         row = -1
+         self.clazz = clazz
+         self.__NotifyRowChanges(old_len, self.GetNumberRows())
+         #
+         # XXX: this is dead code at the moment
+         #
+         if row > -1:
+             self.GetView().ClearSelection()
+             self.GetView().SelectRow(row)
+             self.GetView().MakeCellVisible(row, 0)
+         self.__Modified()
+         self.GetView().EndBatch()
+         self.GetView().FitInside()
+     def __NotifyRowChanges(self, curRows, newRows):
+         #
+         # silly message processing for updates to the number of
+         # rows and columns
+         #
+         if newRows > curRows:
+             msg = wxGridTableMessage(self,
+                         wxGRIDTABLE_NOTIFY_ROWS_APPENDED,
+                         newRows - curRows)    # how many
+             self.GetView().ProcessTableMessage(msg)
+             self.GetView().FitInside()
+         elif newRows < curRows:
+             msg = wxGridTableMessage(self,
+                         wxGRIDTABLE_NOTIFY_ROWS_DELETED,
+                         curRows,              # position
+                         curRows - newRows)    # how many
+             self.GetView().ProcessTableMessage(msg)
+             self.GetView().FitInside()
+     def __SetRow(self, row, group):
+         """Set a row's data to that of the group.
+         The table is considered modified after this operation.
+         row -- if row is < 0 'group' is inserted at the top of the table
+                if row is >= GetNumberRows() or None 'group' is append to
+                     the end of the table.
+                otherwise 'group' replaces row 'row'
+         """
+         # either append or replace
+         if row is None or row >= self.GetNumberRows():
+             self.clazz.AppendGroup(group)
+         elif row < 0:
+             self.clazz.InsertGroup(0, group)
+         else:
+             if row == 0:
+                 self.clazz.SetDefaultGroup(group)
+             else:
+                 self.clazz.ReplaceGroup(row - 1, group)
+         self.__Modified()
+     def GetColLabelValue(self, col):
+         """Return the label for the given column."""
+         return self.__col_labels[col]
+     def GetRowLabelValue(self, row):
+         """Return the label for the given row."""
+         if row == 0:
+             return _("Default")
+         else:
+             group = self.clazz.GetGroup(row - 1)
+             if isinstance(group, ClassGroupDefault):   return _("Default")
+             if isinstance(group, ClassGroupSingleton): return _("Singleton")
+             if isinstance(group, ClassGroupRange):     return _("Range")
+             if isinstance(group, ClassGroupMap):       return _("Map")
+         assert False # shouldn't get here
+         return ""
      def GetNumberRows(self):
-         return len(self.tdata)
+         """Return the number of rows."""
+         if self.clazz is None:
+             return 0
+         return self.clazz.GetNumGroups() + 1 # +1 for default group
      def GetNumberCols(self):
-         return 2
+         """Return the number of columns."""
+         return NUM_COLS
      def IsEmptyCell(self, row, col):
-         return false
+         """Determine if a cell is empty. This is always false."""
+         return False
      def GetValue(self, row, col):
-         return self.tdata[row][col]
+         """Return the object that is used to represent the given
+            cell coordinates. This may not be a string."""
+         return self.GetValueAsCustom(row, col, None)
      def SetValue(self, row, col, value):
-         pass
+         """Assign 'value' to the cell specified by 'row' and 'col'.
+         The table is considered modified after this operation.
+         """
- class Classifier(wxDialog):
+         self.SetValueAsCustom(row, col, None, value)
+     def GetValueAsCustom(self, row, col, typeName):
+         """Return the object that is used to represent the given
+            cell coordinates. This may not be a string.
+         typeName -- unused, but needed to overload wxPyGridTableBase
+         """
+         if row == 0:
+             group = self.clazz.GetDefaultGroup()
+         else:
+             group = self.clazz.GetGroup(row - 1)
+         if col == COL_VISIBLE:
+             return group.IsVisible()
+         if col == COL_SYMBOL:
+             return group.GetProperties()
+         if col == COL_LABEL:
+             return group.GetLabel()
+         # col must be COL_VALUE
+         assert col == COL_VALUE
+         if isinstance(group, ClassGroupDefault):
+             return _("DEFAULT")
+         elif isinstance(group, ClassGroupSingleton):
+             return group.GetValue()
+         elif isinstance(group, ClassGroupRange):
+             return _("%s - %s") % (group.GetMin(), group.GetMax())
+         assert(False) # shouldn't get here
+         return None
+     def __ParseInput(self, value):
+         """Try to determine what kind of input value is
+            (string, number, or range)
+         Returns a tuple of length one if there is a single
+         value, or of length two if it is a range.
+         """
+         type = self.fieldType
+         if type == FIELDTYPE_STRING:
+             return (value,)
+         elif type in (FIELDTYPE_INT, FIELDTYPE_DOUBLE):
+             if type == FIELDTYPE_INT:
+                 # the float call allows the user to enter 1.0 for 1
+                 conv = lambda p: int(float(p))
+             else:
+                 conv = lambda p: p
+             #
+             # first try to take the input as a single number
+             # if there's an exception try to break it into
+             # a range seperated by a '-'. take care to ignore
+             # a leading '-' as that could be for a negative number.
+             # then try to parse the individual parts. if there
+             # is an exception here, let it pass up to the calling
+             # function.
+             #
+             try:
+                 return (conv(value),)
+             except ValueError:
+                 i = value.find('-')
+                 if i == 0:
+                     i = value.find('-', 1)
+                 return (conv(value[:i]), conv(value[i+1:]))
+         assert False  # shouldn't get here
+         return (0,)
+     def SetValueAsCustom(self, row, col, typeName, value):
+         """Set the cell specified by 'row' and 'col' to 'value'.
+         If column represents the value column, the input is parsed
+         to determine if a string, number, or range was entered.
+         A new ClassGroup may be created if the type of data changes.
+         The table is considered modified after this operation.
+         typeName -- unused, but needed to overload wxPyGridTableBase
+         """
+         assert 0 <= col < self.GetNumberCols()
+         assert 0 <= row < self.GetNumberRows()
+         if row == 0:
+             group = self.clazz.GetDefaultGroup()
+         else:
+             group = self.clazz.GetGroup(row - 1)
+         mod = True # assume the data will change
+         if col == COL_VISIBLE:
+             group.SetVisible(value)
+         elif col == COL_SYMBOL:
+             group.SetProperties(value)
+         elif col == COL_LABEL:
+             group.SetLabel(value)
+         elif col == COL_VALUE:
+             if isinstance(group, ClassGroupDefault):
+                 # not allowed to modify the default value
+                 pass
+             elif isinstance(group, ClassGroupMap):
+                 # something special
+                 pass
+             else: # SINGLETON, RANGE
+                 try:
+                     dataInfo = self.__ParseInput(value)
+                 except ValueError:
+                     # bad input, ignore the request
+                     mod = False
+                 else:
+                     changed = False
+                     ngroup = group
+                     props = group.GetProperties()
+                     #
+                     # try to update the values, which may include
+                     # changing the underlying group type if the
+                     # group was a singleton and a range was entered
+                     #
+                     if len(dataInfo) == 1:
+                         if not isinstance(group, ClassGroupSingleton):
+                             ngroup = ClassGroupSingleton(props = props)
+                             changed = True
+                         ngroup.SetValue(dataInfo[0])
+                     elif len(dataInfo) == 2:
+                         if not isinstance(group, ClassGroupRange):
+                             ngroup = ClassGroupRange(props = props)
+                             changed = True
+                         ngroup.SetRange(dataInfo[0], dataInfo[1])
+                     else:
+                         assert False
+                         pass
+                     if changed:
+                         ngroup.SetLabel(group.GetLabel())
+                         self.SetClassGroup(row, ngroup)
+         else:
+             assert False # shouldn't be here
+             pass
+         if mod:
+             self.__Modified()
+             self.GetView().Refresh()
+     def GetAttr(self, row, col, someExtraParameter):
+         """Returns the cell attributes"""
+         return self.__colAttr.get(col, wxGridCellAttr()).Clone()
+     def GetClassGroup(self, row):
+         """Return the ClassGroup object representing row 'row'."""
+         #return self.GetValueAsCustom(row, COL_SYMBOL, None)
+         if row == 0:
+             return self.clazz.GetDefaultGroup()
+         else:
+             return self.clazz.GetGroup(row - 1)
+     def SetClassGroup(self, row, group):
+         self.__SetRow(row, group)
+         self.GetView().Refresh()
+     def __Modified(self, mod = True):
+         """Adjust the modified flag.
+         mod -- if -1 set the modified flag to False, otherwise perform
+                an 'or' operation with the current value of the flag and
+                'mod'
+         """
+         if mod == -1:
+             self.modified = False
+         else:
+             self.modified = mod or self.modified
+     def IsModified(self):
+         """True if this table is considered modified."""
+         return self.modified
+     def DeleteRows(self, pos, numRows = 1):
+         """Deletes 'numRows' beginning at row 'pos'.
+         The row representing the default group is not removed.
+         The table is considered modified if any rows are removed.
+         """
+         assert pos >= 0
+         old_len = self.GetNumberRows()
+         for row in range(pos, pos - numRows, -1):
+             group = self.GetClassGroup(row)
+             if row != 0:
+                 self.clazz.RemoveGroup(row - 1)
+                 self.__Modified()
-     def __init__(self, parent, layer):
+         if self.IsModified():
-         wxDialog.__init__(self, parent, -1, _("Classify"),
+             self.__NotifyRowChanges(old_len, self.GetNumberRows())
-                           style = wxRESIZE_BORDER)
-         topBox = wxBoxSizer(wxVERTICAL)
+     def AppendRows(self, numRows = 1):
+         """Append 'numRows' empty rows to the end of the table.
-         propertyBox = wxBoxSizer(wxHORIZONTAL)
+         The table is considered modified if any rows are appended.
-         propertyBox.Add(wxStaticText(self, -1, _("Property")),
+         """
-, wxALIGN_CENTER | wxALL, 4)
-         self.properties = wxComboBox(self, ID_PROPERTY_SELECT, "",
+         old_len = self.GetNumberRows()
-                                      style = wxCB_READONLY)
+         for i in range(numRows):
+             np = ClassGroupSingleton()
+             self.__SetRow(None, np)
+         if self.IsModified():
+             self.__NotifyRowChanges(old_len, self.GetNumberRows())
+ ID_PROPERTY_REVERT = 4002
+ ID_PROPERTY_ADD = 4003
+ ID_PROPERTY_GENCLASS = 4004
+ ID_PROPERTY_REMOVE = 4005
+ ID_PROPERTY_MOVEUP = 4006
+ ID_PROPERTY_MOVEDOWN = 4007
+ ID_PROPERTY_TRY = 4008
+ ID_PROPERTY_EDITSYM = 4009
+ ID_PROPERTY_SELECT = 4011
+ ID_PROPERTY_TITLE = 4012
+ ID_PROPERTY_FIELDTEXT = 4013
+ BTN_ADD = 0
+ BTN_EDIT = 1
+ BTN_GEN = 2
+ BTN_UP = 3
+ BTN_DOWN = 4
+ BTN_RM = 5
+ EB_LAYER_TITLE = 0
+ EB_SELECT_FIELD = 1
+ EB_GEN_CLASS = 2
+ class Classifier(NonModalDialog):
+     type2string = {None:             _("None"),
+                    FIELDTYPE_STRING: _("Text"),
+                    FIELDTYPE_INT:    _("Integer"),
+                    FIELDTYPE_DOUBLE: _("Decimal")}
+     def __init__(self, parent, name, layer, group = None):
+         NonModalDialog.__init__(self, parent, name, "")
+         self.__SetTitle(layer.Title())
+         self.layer = layer
+         self.originalClass = self.layer.GetClassification()
+         field = self.originalClass.GetField()
+         fieldType = self.originalClass.GetFieldType()
+         self.genDlg = None
+         ############################
+         # Create the controls
+         #
+         panel = wxPanel(self, -1)
+         text_title = wxTextCtrl(panel, ID_PROPERTY_TITLE, layer.Title())
+         #
+         # make field choice box
+         #
+         self.fields = wxChoice(panel, ID_PROPERTY_SELECT,)
+         self.num_cols = layer.table.NumColumns()
+         # just assume the first field in case one hasn't been
+         # specified in the file.
+         self.__cur_field = 0
+         self.fields.Append("<None>")
+         if self.originalClass.GetFieldType() is None:
+             self.fields.SetClientData(0, copy.deepcopy(self.originalClass))
+         else:
+             self.fields.SetClientData(0, None)
-         self.num_cols = layer.table.field_count()
-         cur_hilight = 0
          for i in range(self.num_cols):
-             type, name, len, decc = layer.table.field_info(i)
+             name = layer.table.Column(i).name
-             if name == layer.classification.field:
+             self.fields.Append(name)
-                 cur_hilight = i
-             self.properties.Append(name)
+             if name == field:
+                 self.__cur_field = i + 1
+                 self.fields.SetClientData(i + 1,
+                                           copy.deepcopy(self.originalClass))
+             else:
+                 self.fields.SetClientData(i + 1, None)
+         self.fieldTypeText = wxStaticText(panel, -1, "")
+         button_gen = wxButton(panel, ID_PROPERTY_GENCLASS, _("Generate Class"))
+         button_add = wxButton(panel, ID_PROPERTY_ADD, _("Add"))
+         button_moveup = wxButton(panel, ID_PROPERTY_MOVEUP, _("Move Up"))
+         button_movedown = wxButton(panel, ID_PROPERTY_MOVEDOWN, _("Move Down"))
+         button_edit = wxButton(panel, ID_PROPERTY_EDITSYM, _("Edit Symbol"))
+         button_remove = wxButton(panel, ID_PROPERTY_REMOVE, _("Remove"))
-         self.properties.SetSelection(cur_hilight)
-         propertyBox.Add(self.properties, 0, wxGROW, 4)
-         EVT_COMBOBOX(self, ID_PROPERTY_SELECT, self.OnPropertySelect)
-         topBox.Add(propertyBox, 0, wxGROW, 4)
+         button_try = wxButton(panel, ID_PROPERTY_TRY, _("Try"))
+         button_revert = wxButton(panel, ID_PROPERTY_REVERT, _("Revert"))
+         button_ok = wxButton(panel, wxID_OK, _("OK"))
+         button_ok.SetDefault()
+         button_close = wxButton(panel, wxID_CANCEL, _("Close"))
+         self.classGrid = ClassGrid(panel, self)
+         # calling __SelectField after creating the classGrid fills in the
+         # grid with the correct information
+         self.fields.SetSelection(self.__cur_field)
+         self.__SelectField(self.__cur_field, group = group)
+         ############################
+         # Layout the controls
          #
-         # Classification data table
+         topBox = wxBoxSizer(wxVERTICAL)
+         panelBox = wxBoxSizer(wxVERTICAL)
+         sizer = wxBoxSizer(wxHORIZONTAL)
+         sizer.Add(wxStaticText(panel, -1, _("Title: ")),
+, wxALIGN_LEFT | wxALL | wxALIGN_CENTER_VERTICAL, 4)
+         sizer.Add(text_title, 1, wxGROW, 0)
+         panelBox.Add(sizer, 0, wxGROW, 4)
+         panelBox.Add(wxStaticText(panel, -1,
+                                 _("Type: %s") % layer.ShapeType()),
+, wxALIGN_LEFT | wxALL, 4)
+         classBox = wxStaticBoxSizer(
+                     wxStaticBox(panel, -1, _("Classification")), wxVERTICAL)
+         sizer = wxBoxSizer(wxHORIZONTAL)
+         sizer.Add(wxStaticText(panel, ID_PROPERTY_FIELDTEXT, _("Field: ")),
+, wxALIGN_LEFT | wxALIGN_CENTER_VERTICAL | wxALL, 4)
+         sizer.Add(self.fields, 1, wxGROW | wxALL, 4)
+         classBox.Add(sizer, 0, wxGROW, 4)
+         classBox.Add(self.fieldTypeText, 0,
+                      wxGROW | wxALIGN_LEFT | wxALL | wxADJUST_MINSIZE, 4)
+         controlBox = wxBoxSizer(wxHORIZONTAL)
+         controlButtonBox = wxBoxSizer(wxVERTICAL)
+         controlButtonBox.Add(button_gen, 0, wxGROW|wxALL, 4)
+         controlButtonBox.Add(button_add, 0, wxGROW|wxALL, 4)
+         controlButtonBox.Add(button_moveup, 0, wxGROW|wxALL, 4)
+         controlButtonBox.Add(button_movedown, 0, wxGROW|wxALL, 4)
+         controlButtonBox.Add(button_edit, 0, wxGROW|wxALL, 4)
+         controlButtonBox.Add(60, 20, 0, wxGROW|wxALL|wxALIGN_BOTTOM, 4)
+         controlButtonBox.Add(button_remove, 0, wxGROW|wxALL|wxALIGN_BOTTOM, 4)
+         controlBox.Add(self.classGrid, 1, wxGROW, 0)
+         controlBox.Add(controlButtonBox, 0, wxGROW, 10)
+         classBox.Add(controlBox, 1, wxGROW, 10)
+         panelBox.Add(classBox, 1, wxGROW, 0)
+         buttonBox = wxBoxSizer(wxHORIZONTAL)
+         buttonBox.Add(button_try, 0, wxALL, 4)
+         buttonBox.Add(60, 20, 0, wxALL, 4)
+         buttonBox.Add(button_revert, 0, wxALL, 4)
+         buttonBox.Add(60, 20, 0, wxALL, 4)
+         buttonBox.Add(button_ok, 0, wxALL, 4)
+         buttonBox.Add(60, 20, 0, wxALL, 4)
+         buttonBox.Add(button_close, 0, wxALL, 4)
+         panelBox.Add(buttonBox, 0,
+             wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_BOTTOM, 0)
+         panel.SetAutoLayout(True)
+         panel.SetSizer(panelBox)
+         panelBox.Fit(panel)
+         panelBox.SetSizeHints(panel)
+         topBox.Add(panel, 1, wxGROW | wxALL, 4)
+         self.SetAutoLayout(True)
+         self.SetSizer(topBox)
+         topBox.Fit(self)
+         topBox.SetSizeHints(self)
+         self.Layout()
+         ###########
+         EVT_CHOICE(self, ID_PROPERTY_SELECT, self._OnFieldSelect)
+         EVT_TEXT(self, ID_PROPERTY_TITLE, self._OnTitleChanged)
+         EVT_BUTTON(self, wxID_OK, self._OnOK)
+         EVT_BUTTON(self, ID_PROPERTY_TRY, self._OnTry)
+         EVT_BUTTON(self, wxID_CANCEL, self._OnCloseBtn)
+         EVT_BUTTON(self, ID_PROPERTY_REVERT, self._OnRevert)
+         EVT_BUTTON(self, ID_PROPERTY_ADD, self._OnAdd)
+         EVT_BUTTON(self, ID_PROPERTY_EDITSYM, self._OnEditSymbol)
+         EVT_BUTTON(self, ID_PROPERTY_REMOVE, self._OnRemove)
+         EVT_BUTTON(self, ID_PROPERTY_GENCLASS, self._OnGenClass)
+         EVT_BUTTON(self, ID_PROPERTY_MOVEUP, self._OnMoveUp)
+         EVT_BUTTON(self, ID_PROPERTY_MOVEDOWN, self._OnMoveDown)
+         ######################
+         self.fields.SetFocus()
+         self.haveApplied = False
+     def EditSymbol(self, row):
+         table = self.classGrid.GetTable()
+         prop = table.GetValueAsCustom(row, COL_SYMBOL, None)
+         # get a new ClassGroupProperties object and copy the
+         # values over to our current object
+         propDlg = SelectPropertiesDialog(NULL, prop, self.layer.ShapeType())
+         self.Enable(False)
+         if propDlg.ShowModal() == wxID_OK:
+             new_prop = propDlg.GetClassGroupProperties()
+             table.SetValueAsCustom(row, COL_SYMBOL, None, new_prop)
+         self.Enable(True)
+         propDlg.Destroy()
+     def _SetClassification(self, clazz):
+         self.fields.SetClientData(self.__cur_field, clazz)
+         self.classGrid.GetTable().SetClassification(clazz)
+     def __BuildClassification(self, fieldIndex, copyClass = False):
+ #       numRows = self.classGrid.GetNumberRows()
+ #       assert numRows > 0  # there should always be a default row
+ #       clazz = Classification()
+         if fieldIndex == 0:
+             fieldName = None
+             fieldType = None
+         else:
+             fieldName = self.fields.GetString(fieldIndex)
+             fieldType = self.layer.GetFieldType(fieldName)
+         clazz = self.classGrid.GetTable().GetClassification()
+         if copyClass:
+             clazz = copy.deepcopy(clazz)
+         clazz.SetField(fieldName)
+         clazz.SetFieldType(fieldType)
+ #       table = self.classGrid.GetTable()
+ #       clazz.SetDefaultGroup(table.GetClassGroup(0))
+ #       for i in range(1, numRows):
+ #           clazz.AppendGroup(table.GetClassGroup(i))
+         return clazz
+     def __SetGridTable(self, fieldIndex, group = None):
+         clazz = self.fields.GetClientData(fieldIndex)
+         if clazz is None:
+             clazz = Classification()
+             clazz.SetDefaultGroup(
+                 ClassGroupDefault(
+                     self.layer.GetClassification().
+                                GetDefaultGroup().GetProperties()))
+             fieldName = self.fields.GetString(fieldIndex)
+             fieldType = self.layer.GetFieldType(fieldName)
+             clazz.SetFieldType(fieldType)
+         self.classGrid.CreateTable(clazz, self.layer.ShapeType(), group)
+     def __SetFieldTypeText(self, fieldIndex):
+         fieldName = self.fields.GetString(fieldIndex)
+         fieldType = self.layer.GetFieldType(fieldName)
+         assert Classifier.type2string.has_key(fieldType)
+         text = Classifier.type2string[fieldType]
+         self.fieldTypeText.SetLabel(_("Data Type: %s") % text)
+     def __SelectField(self, newIndex, oldIndex = -1, group = None):
+         """This method assumes that the current selection for the
+         combo has already been set by a call to SetSelection().
+         """
+         assert oldIndex >= -1
+         if oldIndex != -1:
+             clazz = self.__BuildClassification(oldIndex)
+             self.fields.SetClientData(oldIndex, clazz)
+         self.__SetGridTable(newIndex, group)
+         self.__EnableButtons(EB_SELECT_FIELD, newIndex != 0)
+         self.__SetFieldTypeText(newIndex)
+     def __SetTitle(self, title):
+         if title != "":
+             title = ": " + title
+         self.SetTitle(_("Layer Properties") + title)
+     def _OnEditSymbol(self, event):
+         sel = self.classGrid.GetCurrentSelection()
+         if len(sel) == 1:
+             self.EditSymbol(sel[0])
+     def _OnFieldSelect(self, event):
+         index = self.fields.GetSelection()
+         self.__SelectField(index, self.__cur_field)
+         self.__cur_field = index
+     def _OnTry(self, event):
+         """Put the data from the table into a new Classification and hand
+            it to the layer.
+         """
+         clazz = self.fields.GetClientData(self.__cur_field)
+         #
+         # only build the classification if there wasn't one to
+         # to begin with or it has been modified
          #
+         if clazz is None or self.classGrid.GetTable().IsModified():
+             clazz = self.__BuildClassification(self.__cur_field, True)
+         self.layer.SetClassification(clazz)
+         self.haveApplied = True
+     def _OnOK(self, event):
+         self._OnTry(event)
+         self.Close()
+     def OnClose(self, event):
+         NonModalDialog.OnClose(self, event)
+     def _OnCloseBtn(self, event):
+         """Close is similar to Cancel except that any changes that were
+         made and applied remain applied, but the currently displayed
+         classification is discarded.
+         """
-         self.classTable = wxGrid(self, ID_CLASS_TABLE, size=(300, 150))
+         self.Close()
-         table = ClassTable(layer.classification)
+     def _OnRevert(self, event):
-         self.classTable.SetTable(table, true)
+         """The layer's current classification stays the same."""
+         if self.haveApplied:
+             self.layer.SetClassification(self.originalClass)
-         topBox.Add(self.classTable, 0, wxGROW, 0)
+         #self.Close()
+     def _OnAdd(self, event):
+         self.classGrid.AppendRows()
+     def _OnRemove(self, event):
+         self.classGrid.DeleteSelectedRows()
+     def _OnGenClass(self, event):
+         self.genDlg = ClassGenDialog(self, self.layer,
+                           self.fields.GetString(self.__cur_field))
+         EVT_CLOSE(self.genDlg, self._OnGenDialogClose)
+         self.__EnableButtons(EB_GEN_CLASS, False)
+         self.genDlg.Show()
+     def _OnGenDialogClose(self, event):
+         self.genDlg.Destroy()
+         self.__EnableButtons(EB_GEN_CLASS, True)
+     def _OnMoveUp(self, event):
+         sel = self.classGrid.GetCurrentSelection()
+         if len(sel) == 1:
+             i = sel[0]
+             if i > 1:
+                 table = self.classGrid.GetTable()
+                 x = table.GetClassGroup(i - 1)
+                 y = table.GetClassGroup(i)
+                 table.SetClassGroup(i - 1, y)
+                 table.SetClassGroup(i, x)
+                 self.classGrid.ClearSelection()
+                 self.classGrid.SelectRow(i - 1)
+                 self.classGrid.MakeCellVisible(i - 1, 0)
+     def _OnMoveDown(self, event):
+         sel = self.classGrid.GetCurrentSelection()
+         if len(sel) == 1:
+             i = sel[0]
+             table = self.classGrid.GetTable()
+             if 0 < i < table.GetNumberRows() - 1:
+                 x = table.GetClassGroup(i)
+                 y = table.GetClassGroup(i + 1)
+                 table.SetClassGroup(i, y)
+                 table.SetClassGroup(i + 1, x)
+                 self.classGrid.ClearSelection()
+                 self.classGrid.SelectRow(i + 1)
+                 self.classGrid.MakeCellVisible(i + 1, 0)
+     def _OnTitleChanged(self, event):
+         obj = event.GetEventObject()
+         self.layer.SetTitle(obj.GetValue())
+         self.__SetTitle(self.layer.Title())
+         self.__EnableButtons(EB_LAYER_TITLE, self.layer.Title() != "")
+     def __EnableButtons(self, case, enable):
+         if case == EB_LAYER_TITLE:
+             list = (wxID_OK,
+                     wxID_CANCEL)
+         elif case == EB_SELECT_FIELD:
+             list = (ID_PROPERTY_GENCLASS,
+                     ID_PROPERTY_ADD,
+                     ID_PROPERTY_MOVEUP,
+                     ID_PROPERTY_MOVEDOWN,
+                     ID_PROPERTY_EDITSYM,
+                     ID_PROPERTY_REMOVE)
+         elif case == EB_GEN_CLASS:
+             list = (ID_PROPERTY_SELECT,
+                     ID_PROPERTY_FIELDTEXT,
+                     ID_PROPERTY_GENCLASS,
+                     ID_PROPERTY_EDITSYM)
+         for id in list:
+             self.FindWindowById(id).Enable(enable)
+ ID_SELPROP_SPINCTRL = 4002
+ ID_SELPROP_PREVIEW = 4003
+ ID_SELPROP_STROKECLR = 4004
+ ID_SELPROP_FILLCLR = 4005
+ ID_SELPROP_STROKECLRTRANS = 4006
+ ID_SELPROP_FILLCLRTRANS = 4007
+ class SelectPropertiesDialog(wxDialog):
+     def __init__(self, parent, prop, shapeType):
+         wxDialog.__init__(self, parent, -1, _("Select Properties"),
+                           style = wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
+         self.prop = ClassGroupProperties(prop)
+         topBox = wxBoxSizer(wxVERTICAL)
+         itemBox = wxBoxSizer(wxHORIZONTAL)
+         # preview box
+         previewBox = wxBoxSizer(wxVERTICAL)
+         previewBox.Add(wxStaticText(self, -1, _("Preview:")),
+, wxALIGN_LEFT | wxALL, 4)
+         self.previewWin = ClassGroupPropertiesCtrl(
+             self, ID_SELPROP_PREVIEW, self.prop, shapeType,
+             (40, 40), wxSIMPLE_BORDER)
+         self.previewWin.AllowEdit(False)
+         previewBox.Add(self.previewWin, 1, wxGROW | wxALL, 4)
+         itemBox.Add(previewBox, 1, wxALIGN_LEFT | wxALL | wxGROW, 0)
+         # control box
+         ctrlBox = wxBoxSizer(wxVERTICAL)
+         lineColorBox = wxBoxSizer(wxHORIZONTAL)
+         button = wxButton(self, ID_SELPROP_STROKECLR, _("Change Line Color"))
+         button.SetFocus()
+         lineColorBox.Add(button, 1, wxALL | wxGROW, 4)
+         EVT_BUTTON(self, ID_SELPROP_STROKECLR, self._OnChangeLineColor)
+         lineColorBox.Add(
+             wxButton(self, ID_SELPROP_STROKECLRTRANS, _("Transparent")),
+, wxALL | wxGROW, 4)
+         EVT_BUTTON(self, ID_SELPROP_STROKECLRTRANS,
+                    self._OnChangeLineColorTrans)
+         ctrlBox.Add(lineColorBox, 0,
+                     wxALIGN_CENTER_HORIZONTAL | wxALL | wxGROW, 4)
+         if shapeType != SHAPETYPE_ARC:
+             fillColorBox = wxBoxSizer(wxHORIZONTAL)
+             fillColorBox.Add(
+                 wxButton(self, ID_SELPROP_FILLCLR, _("Change Fill Color")),
+, wxALL | wxGROW, 4)
+             EVT_BUTTON(self, ID_SELPROP_FILLCLR, self._OnChangeFillColor)
+             fillColorBox.Add(
+                 wxButton(self, ID_SELPROP_FILLCLRTRANS, _("Transparent")),
+, wxALL | wxGROW, 4)
+             EVT_BUTTON(self, ID_SELPROP_FILLCLRTRANS,
+                        self._OnChangeFillColorTrans)
+             ctrlBox.Add(fillColorBox, 0,
+                         wxALIGN_CENTER_HORIZONTAL | wxALL | wxGROW, 4)
+         spinBox = wxBoxSizer(wxHORIZONTAL)
+         spinBox.Add(wxStaticText(self, -1, _("Line Width: ")),
+, wxALIGN_LEFT | wxALIGN_CENTER_VERTICAL | wxALL, 4)
+         self.spinCtrl = wxSpinCtrl(self, ID_SELPROP_SPINCTRL,
+                                    min=1, max=10,
+                                    value=str(prop.GetLineWidth()),
+                                    initial=prop.GetLineWidth())
+         EVT_SPINCTRL(self, ID_SELPROP_SPINCTRL, self._OnSpin)
+         spinBox.Add(self.spinCtrl, 0, wxALIGN_LEFT | wxALL, 4)
+         ctrlBox.Add(spinBox, 0, wxALIGN_RIGHT | wxALL, 0)
+         itemBox.Add(ctrlBox, 0, wxALIGN_RIGHT | wxALL | wxGROW, 0)
+         topBox.Add(itemBox, 1, wxALIGN_LEFT | wxALL | wxGROW, 0)
          #
          # Control buttons:
          #
          buttonBox = wxBoxSizer(wxHORIZONTAL)
-         buttonBox.Add(wxButton(self, ID_CLASSIFY_OK, _("OK")),
+         button_ok = wxButton(self, wxID_OK, _("OK"))
-, wxALL, 4)
+         button_ok.SetDefault()
-         buttonBox.Add(wxButton(self, ID_CLASSIFY_CANCEL, _("Cancel")),
+         buttonBox.Add(button_ok, 0, wxALL, 4)
+         buttonBox.Add(wxButton(self, wxID_CANCEL, _("Cancel")),
 , wxALL, 4)
          topBox.Add(buttonBox, 0, wxALIGN_CENTER_HORIZONTAL|wxALIGN_BOTTOM, 10)
-         EVT_BUTTON(self, ID_CLASSIFY_OK, self.OnOK)
+         #EVT_BUTTON(self, wxID_OK, self._OnOK)
-         EVT_BUTTON(self, ID_CLASSIFY_CANCEL, self.OnCancel)
+         #EVT_BUTTON(self, ID_SELPROP_CANCEL, self._OnCancel)
-         self.SetAutoLayout(true)
+         self.SetAutoLayout(True)
          self.SetSizer(topBox)
          topBox.Fit(self)
          topBox.SetSizeHints(self)
-     def OnPropertySelect(self, event): pass
      def OnOK(self, event):
          self.EndModal(wxID_OK)
      def OnCancel(self, event):
          self.EndModal(wxID_CANCEL)
+     def _OnSpin(self, event):
+         self.prop.SetLineWidth(self.spinCtrl.GetValue())
+         self.previewWin.Refresh()
+     def __GetColor(self, cur):
+         dialog = wxColourDialog(self)
+         if cur is not Color.Transparent:
+             dialog.GetColourData().SetColour(Color2wxColour(cur))
+         ret = None
+         if dialog.ShowModal() == wxID_OK:
+             ret = wxColour2Color(dialog.GetColourData().GetColour())
+         dialog.Destroy()
+         return ret
+     def _OnChangeLineColor(self, event):
+         clr = self.__GetColor(self.prop.GetLineColor())
+         if clr is not None:
+             self.prop.SetLineColor(clr)
+         self.previewWin.Refresh() # XXX: work around, see ClassDataPreviewer
+     def _OnChangeLineColorTrans(self, event):
+         self.prop.SetLineColor(Color.Transparent)
+         self.previewWin.Refresh() # XXX: work around, see ClassDataPreviewer
+     def _OnChangeFillColor(self, event):
+         clr = self.__GetColor(self.prop.GetFill())
+         if clr is not None:
+             self.prop.SetFill(clr)
+         self.previewWin.Refresh() # XXX: work around, see ClassDataPreviewer
+     def _OnChangeFillColorTrans(self, event):
+         self.prop.SetFill(Color.Transparent)
+         self.previewWin.Refresh() # XXX: work around, see ClassDataPreviewer
+     def GetClassGroupProperties(self):
+         return self.prop
+ class ClassDataPreviewWindow(wxWindow):
+     def __init__(self, rect, prop, shapeType,
+                        parent = None, id = -1, size = wxDefaultSize):
+         if parent is not None:
+             wxWindow.__init__(self, parent, id, (0, 0), size)
+             EVT_PAINT(self, self._OnPaint)
+         self.rect = rect
+         self.prop = prop
+         self.shapeType = shapeType
+         self.previewer = ClassDataPreviewer()
+     def GetProperties():
+         return self.prop
+     def _OnPaint(self, event):
+         dc = wxPaintDC(self)
+         # XXX: this doesn't seem to be having an effect:
+         dc.DestroyClippingRegion()
+         if self.rect is None:
+             w, h = self.GetSize()
+             rect = wxRect(0, 0, w, h)
+         else:
+             rect = self.rect
+         self.previewer.Draw(dc, rect, self.prop, self.shapeType)
+ class ClassDataPreviewer:
+     def Draw(self, dc, rect, prop, shapeType):
+         assert dc is not None
+         assert isinstance(prop, ClassGroupProperties)
+         if rect is None:
+             x = 0
+             y = 0
+             w, h = dc.GetSize()
+         else:
+             x = rect.GetX()
+             y = rect.GetY()
+             w = rect.GetWidth()
+             h = rect.GetHeight()
+         stroke = prop.GetLineColor()
+         if stroke is Color.Transparent:
+             pen = wxTRANSPARENT_PEN
+         else:
+             pen = wxPen(Color2wxColour(stroke),
+                         prop.GetLineWidth(),
+                         wxSOLID)
+         stroke = prop.GetFill()
+         if stroke is Color.Transparent:
+             brush = wxTRANSPARENT_BRUSH
+         else:
+             brush = wxBrush(Color2wxColour(stroke), wxSOLID)
+         dc.SetPen(pen)
+         dc.SetBrush(brush)
+         if shapeType == SHAPETYPE_ARC:
+             dc.DrawSpline([wxPoint(x, y + h),
+                            wxPoint(x + w/2, y + h/4),
+                            wxPoint(x + w/2, y + h/4*3),
+                            wxPoint(x + w, y)])
+         elif shapeType == SHAPETYPE_POINT:
+             dc.DrawCircle(x + w/2, y + h/2,
+                           (min(w, h) - prop.GetLineWidth())/2)
+         elif shapeType == SHAPETYPE_POLYGON:
+             dc.DrawRectangle(x, y, w, h)
+ class ClassRenderer(wxPyGridCellRenderer):
+     def __init__(self, shapeType):
+         wxPyGridCellRenderer.__init__(self)
+         self.shapeType = shapeType
+         self.previewer = ClassDataPreviewer()
+     def Draw(self, grid, attr, dc, rect, row, col, isSelected):
+         data = grid.GetTable().GetClassGroup(row)
+         dc.SetClippingRegion(rect.GetX(), rect.GetY(),
+                              rect.GetWidth(), rect.GetHeight())
+         dc.SetPen(wxPen(wxLIGHT_GREY))
+         dc.SetBrush(wxBrush(wxLIGHT_GREY, wxSOLID))
+         dc.DrawRectangle(rect.GetX(), rect.GetY(),
+                          rect.GetWidth(), rect.GetHeight())
+         if not isinstance(data, ClassGroupMap):
+             self.previewer.Draw(dc, rect, data.GetProperties(), self.shapeType)
+         if isSelected:
+             dc.SetPen(wxPen(wxBLACK, 1, wxSOLID))
+             dc.SetBrush(wxTRANSPARENT_BRUSH)
+             dc.DrawRectangle(rect.GetX(), rect.GetY(),
+                              rect.GetWidth(), rect.GetHeight())
+         dc.DestroyClippingRegion()
+ class ClassGroupPropertiesCtrl(wxWindow, wxControl):
+     def __init__(self, parent, id, props, shapeType,
+                  size = wxDefaultSize, style = 0):
+         wxWindow.__init__(self, parent, id, size = size, style = style)
+         self.SetProperties(props)
+         self.SetShapeType(shapeType)
+         self.AllowEdit(True)
+         EVT_PAINT(self, self._OnPaint)
+         EVT_LEFT_DCLICK(self, self._OnLeftDClick)
+         self.previewer = ClassDataPreviewer()
+     def _OnPaint(self, event):
+         dc = wxPaintDC(self)
+         # XXX: this doesn't seem to be having an effect:
+         dc.DestroyClippingRegion()
+         w, h = self.GetClientSize()
+         self.previewer.Draw(dc,
+                             wxRect(0, 0, w, h),
+                             self.GetProperties(),
+                             self.GetShapeType())
+     def GetProperties(self):
+         return self.props
+     def SetProperties(self, props):
+         self.props = props
+         self.Refresh()
+     def GetShapeType(self):
+         return self.shapeType
+     def SetShapeType(self, shapeType):
+         self.shapeType = shapeType
+         self.Refresh()
+     def AllowEdit(self, allow):
+         self.allowEdit = allow
+     def DoEdit(self):
+         if not self.allowEdit: return
+         propDlg = SelectPropertiesDialog(NULL,
+                                          self.GetProperties(),
+                                          self.GetShapeType())
+         if propDlg.ShowModal() == wxID_OK:
+             new_prop = propDlg.GetClassGroupProperties()
+             self.SetProperties(new_prop)
+             self.Refresh()
+         propDlg.Destroy()
+     def _OnLeftDClick(self, event):
+         self.DoEdit()

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+Added in v.835

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