wxPython/demo/GridCustEditor.py

   1
   2 import string
   3
   4 import  wx
   5 import  wx.grid as gridlib
   6
   7 #---------------------------------------------------------------------------
   8 class MyCellEditor(gridlib.PyGridCellEditor):
   9     """
  10     This is a sample GridCellEditor that shows you how to make your own custom
  11     grid editors.  All the methods that can be overridden are shown here.  The
  12     ones that must be overridden are marked with "*Must Override*" in the
  13     docstring.
  14
  15     Notice that in order to call the base class version of these special
  16     methods we use the method name preceded by "base_".  This is because these
  17     methods are "virtual" in C++ so if we try to call wx.GridCellEditor.Create
  18     for example, then when the wxPython extension module tries to call
  19     ptr->Create(...) then it actually calls the derived class version which
  20     looks up the method in this class and calls it, causing a recursion loop.
  21     If you don't understand any of this, don't worry, just call the "base_"
  22     version instead.
  23     """
  24     def __init__(self, log):
  25         self.log = log
  26         self.log.write("MyCellEditor ctor\n")
  27         gridlib.PyGridCellEditor.__init__(self)
  28
  29
  30     def Create(self, parent, id, evtHandler):
  31         """
  32         Called to create the control, which must derive from wx.Control.
  33         *Must Override*
  34         """
  35         self.log.write("MyCellEditor: Create\n")
  36         self._tc = wx.TextCtrl(parent, id, "")
  37         self._tc.SetInsertionPoint(0)
  38         self.SetControl(self._tc)
  39
  40         if evtHandler:
  41             self._tc.PushEventHandler(evtHandler)
  42
  43
  44     def SetSize(self, rect):
  45         """
  46         Called to position/size the edit control within the cell rectangle.
  47         If you don't fill the cell (the rect) then be sure to override
  48         PaintBackground and do something meaningful there.
  49         """
  50         self.log.write("MyCellEditor: SetSize %s\n" % rect)
  51         self._tc.SetDimensions(rect.x, rect.y, rect.width+2, rect.height+2,
  52                                wx.SIZE_ALLOW_MINUS_ONE)
  53
  54
  55     def Show(self, show, attr):
  56         """
  57         Show or hide the edit control.  You can use the attr (if not None)
  58         to set colours or fonts for the control.
  59         """
  60         self.log.write("MyCellEditor: Show(self, %s, %s)\n" % (show, attr))
  61         self.base_Show(show, attr)
  62
  63
  64     def PaintBackground(self, rect, attr):
  65         """
  66         Draws the part of the cell not occupied by the edit control.  The
  67         base  class version just fills it with background colour from the
  68         attribute.  In this class the edit control fills the whole cell so
  69         don't do anything at all in order to reduce flicker.
  70         """
  71         self.log.write("MyCellEditor: PaintBackground\n")
  72
  73
  74     def BeginEdit(self, row, col, grid):
  75         """
  76         Fetch the value from the table and prepare the edit control
  77         to begin editing.  Set the focus to the edit control.
  78         *Must Override*
  79         """
  80         self.log.write("MyCellEditor: BeginEdit (%d,%d)\n" % (row, col))
  81         self.startValue = grid.GetTable().GetValue(row, col)
  82         self._tc.SetValue(self.startValue)
  83         self._tc.SetInsertionPointEnd()
  84         self._tc.SetFocus()
  85
  86         # For this example, select the text
  87         self._tc.SetSelection(0, self._tc.GetLastPosition())
  88
  89
  90     def EndEdit(self, row, col, grid):
  91         """
  92         Complete the editing of the current cell. Returns True if the value
  93         has changed.  If necessary, the control may be destroyed.
  94         *Must Override*
  95         """
  96         self.log.write("MyCellEditor: EndEdit (%d,%d)\n" % (row, col))
  97         changed = False
  98
  99         val = self._tc.GetValue()
 100
 101         if val != self.startValue:
 102             changed = True
 103             grid.GetTable().SetValue(row, col, val) # update the table
 104
 105         self.startValue = ''
 106         self._tc.SetValue('')
 107         return changed
 108
 109
 110     def Reset(self):
 111         """
 112         Reset the value in the control back to its starting value.
 113         *Must Override*
 114         """
 115         self.log.write("MyCellEditor: Reset\n")
 116         self._tc.SetValue(self.startValue)
 117         self._tc.SetInsertionPointEnd()
 118
 119
 120     def IsAcceptedKey(self, evt):
 121         """
 122         Return True to allow the given key to start editing: the base class
 123         version only checks that the event has no modifiers.  F2 is special
 124         and will always start the editor.
 125         """
 126         self.log.write("MyCellEditor: IsAcceptedKey: %d\n" % (evt.GetKeyCode()))
 127
 128         ## Oops, there's a bug here, we'll have to do it ourself..
 129         ##return self.base_IsAcceptedKey(evt)
 130
 131         return (not (evt.ControlDown() or evt.AltDown()) and
 132                 evt.GetKeyCode() != wx.WXK_SHIFT)
 133
 134
 135     def StartingKey(self, evt):
 136         """
 137         If the editor is enabled by pressing keys on the grid, this will be
 138         called to let the editor do something about that first key if desired.
 139         """
 140         self.log.write("MyCellEditor: StartingKey %d\n" % evt.GetKeyCode())
 141         key = evt.GetKeyCode()
 142         ch = None
 143         if key in [ wx.WXK_NUMPAD0, wx.WXK_NUMPAD1, wx.WXK_NUMPAD2, wx.WXK_NUMPAD3,
 144                     wx.WXK_NUMPAD4, wx.WXK_NUMPAD5, wx.WXK_NUMPAD6, wx.WXK_NUMPAD7,
 145                     wx.WXK_NUMPAD8, wx.WXK_NUMPAD9
 146                     ]:
 147
 148             ch = ch = chr(ord('0') + key - wx.WXK_NUMPAD0)
 149
 150         elif key < 256 and key >= 0 and chr(key) in string.printable:
 151             ch = chr(key)
 152             if not evt.ShiftDown():
 153                 ch = ch.lower()
 154
 155         if ch is not None:
 156             # For this example, replace the text.  Normally we would append it.
 157             #self._tc.AppendText(ch)
 158             self._tc.SetValue(ch)
 159             self._tc.SetInsertionPointEnd()
 160         else:
 161             evt.Skip()
 162
 163
 164     def StartingClick(self):
 165         """
 166         If the editor is enabled by clicking on the cell, this method will be
 167         called to allow the editor to simulate the click on the control if
 168         needed.
 169         """
 170         self.log.write("MyCellEditor: StartingClick\n")
 171
 172
 173     def Destroy(self):
 174         """final cleanup"""
 175         self.log.write("MyCellEditor: Destroy\n")
 176         self.base_Destroy()
 177
 178
 179     def Clone(self):
 180         """
 181         Create a new object which is the copy of this one
 182         *Must Override*
 183         """
 184         self.log.write("MyCellEditor: Clone\n")
 185         return MyCellEditor(self.log)
 186
 187
 188 #---------------------------------------------------------------------------
 189 class GridEditorTest(gridlib.Grid):
 190     def __init__(self, parent, log):
 191         gridlib.Grid.__init__(self, parent, -1)
 192         self.log = log
 193
 194         self.CreateGrid(10, 3)
 195
 196         # Somebody changed the grid so the type registry takes precedence
 197         # over the default attribute set for editors and renderers, so we
 198         # have to set null handlers for the type registry before the
 199         # default editor will get used otherwise...
 200         #self.RegisterDataType(wxGRID_VALUE_STRING, None, None)
 201         #self.SetDefaultEditor(MyCellEditor(self.log))
 202
 203         # Or we could just do it like this:
 204         #self.RegisterDataType(wx.GRID_VALUE_STRING,
 205         #                      wx.GridCellStringRenderer(),
 206         #                      MyCellEditor(self.log))
 207         #                       )
 208
 209         # but for this example, we'll just set the custom editor on one cell
 210         self.SetCellEditor(1, 0, MyCellEditor(self.log))
 211         self.SetCellValue(1, 0, "Try to edit this box")
 212
 213         # and on a column
 214         attr = gridlib.GridCellAttr()
 215         attr.SetEditor(MyCellEditor(self.log))
 216         self.SetColAttr(2, attr)
 217         self.SetCellValue(1, 2, "or any in this column")
 218
 219         self.SetColSize(0, 150)
 220         self.SetColSize(1, 150)
 221         self.SetColSize(2, 150)
 222
 223
 224 #---------------------------------------------------------------------------
 225
 226 class TestFrame(wx.Frame):
 227     def __init__(self, parent, log):
 228         wx.Frame.__init__(self, parent, -1, "Custom Grid Cell Editor Test",
 229                          size=(640,480))
 230         grid = GridEditorTest(self, log)
 231
 232 #---------------------------------------------------------------------------
 233
 234 if __name__ == '__main__':
 235     import sys
 236     app = wx.PySimpleApp()
 237     frame = TestFrame(None, sys.stdout)
 238     frame.Show(True)
 239     app.MainLoop()
 240
 241