odds and ends...

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10838 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/demo/XMLtreeview.py

@@ -32,6 +32,39 @@ else:
             wxTreeCtrl.__init__(self, parent, ID)
             self.nodeStack = [self.AddRoot("Root")]
 
+            # Trees need an image list to do DnD...
+            self.il = wxImageList(16,16)
+            self.SetImageList(self.il)
+
+            # event handlers for DnD
+            EVT_TREE_BEGIN_DRAG(self, ID, self.OnBeginDrag)
+            EVT_TREE_END_DRAG(self, ID, self.OnEndDrag)
+
+
+        def OnBeginDrag(self, event):
+            item = event.GetItem()
+            if item != self.GetRootItem():
+                self.draggingItem = item
+                event.Allow()  # if DnD of this item is okay Allow it.
+
+
+        def OnEndDrag(self, evt):
+            itemSrc = self.draggingItem
+            itemDst = evt.GetItem()
+            self.draggingItem = None
+
+            if not itemDst.IsOk():
+                print "Can't drag to here..."
+                return
+
+            # For this simple example just take the text of the source item
+            # and append it to the destination item.  In real life you would
+            # possibly want to copy subtrees...
+            text = self.GetItemText(itemSrc)
+            self.AppendItem(itemDst, text)
+            self.Delete(itemSrc)
+
+
         # Define a handler for start element events
         def StartElement(self, name, attrs ):
             if py2: