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copied!<p>This is something I did a while ago to get a ListCtrl with items that fade out when deleted. Save the code to fade.py and run it to see the demo. Shouldn't be too hard to adapt it to a Grid.</p> <pre><code>import wx class FadeMixin(object): ''' FadeMixin provides one public method: DeleteItem. It is meant to be mixed in with a ListCtrl to 'fade out' items before they are really deleted. Mixin like this: Assumption: the background colour of the control is wx.WHITE class MyListCtrl(FadeMixin, wx.ListCtrl): ... ''' def __init__(self, *args, **kwargs): self.__bgColour = wx.WHITE super(FadeMixin, self).__init__(*args, **kwargs) def DeleteItem(self, index, fadeStep=10, fadeSpeed=50): if self.IsEnabled(): self.__startDeleteItem(index) fgColour, bgColour, transparentColour = self.__getColours(index) if fgColour == bgColour == transparentColour: self.__finishDeleteItem(index) else: for colour, setColour in [(fgColour, self.SetItemTextColour), (bgColour, self.SetItemBackgroundColour)]: fadedColour = self.__fadeColour(colour, transparentColour, fadeStep) setColour(index, fadedColour) wx.FutureCall(50, self.DeleteItem, index, fadeStep, fadeSpeed) def SetBackgroundColour(self, colour): self.__bgColour = colour super(FadeMixin, self).SetBackgroundColour(colour) def GetBackgroundColour(self): return self.__bgColour def __startDeleteItem(self, index): # Prevent user input during deletion. Things could get messy if # the user deletes another item when we're still busy fading out the # first one: self.Disable() # Unselect the item that is to be deleted to make the fading visible: currentState = self.GetItemState(index, wx.LIST_STATE_SELECTED) self.SetItemState(index, ~currentState, wx.LIST_STATE_SELECTED) def __finishDeleteItem(self, index): super(FadeMixin, self).DeleteItem(index) self.Enable() def __getColours(self, index): fgColour = self.GetItemTextColour(index) bgColour = self.GetItemBackgroundColour(index) transparentColour = self.GetBackgroundColour() if not bgColour: bgColour = transparentColour return fgColour, bgColour, transparentColour def __fadeColour(self, colour, transparentColour, fadeStep): newColour = [] for GetIntensity in wx.Colour.Red, wx.Colour.Green, wx.Colour.Blue: currentIntensity = GetIntensity(colour) transparentIntensity = GetIntensity(transparentColour) if currentIntensity < transparentIntensity: newIntensity = min(transparentIntensity, currentIntensity + fadeStep) elif currentIntensity > transparentIntensity: newIntensity = max(transparentIntensity, currentIntensity - fadeStep) else: newIntensity = transparentIntensity newColour.append(newIntensity) return wx.Colour(*newColour) class ListCtrl(FadeMixin, wx.ListCtrl): pass class Frame(wx.Frame): def __init__(self, *args, **kwargs): super(Frame, self).__init__(*args, **kwargs) self.list = ListCtrl(self, style=wx.LC_REPORT) self.list.InsertColumn(0, 'Column 0') self.list.InsertColumn(1, 'Column 1') self.fillList() self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.onSelected) self.Bind(wx.EVT_LIST_DELETE_ITEM, self.onDeleted) def onSelected(self, event): self.list.DeleteItem(event.GetIndex()) def onDeleted(self, event): if self.list.GetItemCount() == 1: wx.CallAfter(self.fillList, False) def fillList(self, firstTime=True): for row in range(10): self.list.InsertStringItem(row, 'Item %d, Column 0'%row) self.list.SetStringItem(row, 1, 'Item %d, Column 1'%row) self.list.SetItemBackgroundColour(1, wx.BLUE) self.list.SetItemTextColour(2, wx.BLUE) self.list.SetItemBackgroundColour(3, wx.GREEN) self.list.SetItemTextColour(4, wx.GREEN) self.list.SetItemBackgroundColour(5, wx.RED) self.list.SetItemTextColour(6, wx.RED) self.list.SetItemBackgroundColour(7, wx.BLACK) self.list.SetItemTextColour(7, wx.WHITE) self.list.SetItemBackgroundColour(8, wx.WHITE) self.list.SetItemTextColour(8, wx.BLACK) if not firstTime: self.list.SetBackgroundColour(wx.BLUE) app = wx.App(False) frame = Frame(None, title='Select an item to fade it out') frame.Show() app.MainLoop() </code></pre>

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