wxpython拖放dataobjectcomposite

Question

我花了更多的时间而不是承认这一点，我真的很喜欢 帮助理解wxPython的内外拖放。

注意：是的我已经阅读了文档，不幸的是我很难跟踪和理解它们。是的，代码过于简单，无法进行共享和测试。

请和谢谢！

详细

- Python 2.7.6
- Wxpython 3.0.0.0 msw (classic)

我想实现以下

1. Have a view that calls dropSource.doDragDrop() that makes use of a wx.CompositeDataObject
2. Have a window you can drop in that reads wx.CompositeDataObject
3. The wx.CompositeDataObject components would contain generic DataObjects (no TextDataObject, etc... )

问题是

1. 如何从CompositeDataObjects发送和检索数据？

当前代码

Screen Shot http://i58.tinypic.com/2z3tglf.jpg

import wx

#Bare Bones App for Testing Only
app = wx.App()
someParentWindow = wx.Frame(None)
someParentWindow.Show(True)

#Drag Implementation
def _drag(e):
        if e.Dragging():
                dropSource = wx.DropSource( e.GetEventObject() )
                textdf = wx.DataFormat( wx.DF_TEXT )
                textdo = wx.DataObjectSimple()
                textdo.SetData("asd")
                data = wx.DataObjectComposite()
                data.Add( textdo )
                dropSource.SetData(data)
                result = dropSource.DoDragDrop()
                print result

text = wx.StaticText( someParentWindow, label="Drag Me")
text.Bind(wx.EVT_MOTION, _drag)

#Drop Implementation
class DropTarget(wx.PyDropTarget):
        def __init__(self, windowTarget):
                super(DropTarget,self).__init__()
                self.window = windowTarget
                textdf = wx.DataFormat( wx.DF_TEXT )
                self.textdo = wx.DataObjectSimple()
                self.do = wx.DataObjectComposite()
                self.do.Add( self.textdo )
                self.SetDataObject( self.do )

        def OnData(self,x,y,d):
                #Get the composite data
                pass


textctr = wx.TextCtrl( someParentWindow, pos=(3,20) )
textctr.SetDropTarget( DropTarget( textctr ) )


#MainLoop
app.MainLoop()