我想使用拖动&拖放与wx.dataview.DataViewCtrl
的组合,所以我开始尝试使用拖动&拖放来重新排序行。我无法找到任何示例如何在wxpython中正确执行此操作,但无论如何,我设法让它部分工作(请参见下文)。如何使用wxpython的DataViewCtrl拖放
不幸的是,event.GetDataObject()
总是返回None
在我的on_drop
函数中。任何指针如何获得我在on_begin_drag
中分配的DataObject?我究竟做错了什么?
在此先感谢!
设置:
- ArchLinux的(64位)
- python2 2.7.9-1
- 的wxPython 3.0.2.0-1
- gtk3 3.14.8-1
- gnome-shell 3.14.3-2
示例代码:
import wx
import wx.dataview
DF_PLAYLIST_SONG = wx.CustomDataFormat("playlist_song")
class MyDataViewCtrl(wx.dataview.DataViewCtrl)
def __init__(self, *args. **kwargs)
[...]
self.Bind(wx.dataview.EVT_DATAVIEW_ITEM_BEGIN_DRAG, self.on_begin_drag)
self.Bind(wx.dataview.EVT_DATAVIEW_ITEM_DROP, self.on_drop)
self.EnableDragSource(DF_PLAYLIST_SONG)
self.EnableDropTarget(DF_PLAYLIST_SONG)
[...]
def on_begin_drag(self, event):
text = self._model.GetValue(event.GetItem(), 0)
data = wx.CustomDataObject(DF_PLAYLIST_SONG)
# Need to encode, because SetData dislikes unicode
data.SetData(text.encode('utf-8'))
event.SetDataObject(data)
#data.this.disown() # Makes no difference if uncommented or not
def on_drop(self, event):
print(event.GetDataFormat()) # Returns DF_PLAYLIST_SONG
if event.GetDataFormat() == DF_PLAYLIST_SONG:
# This would be logical choice:
print(event.GetDataSize()) # Returns the size of the data, e.g 92
print(event.GetDataObject()) # Returns None (strange!)
# Some other stuff I tried
print(event.GetClientObject()) # Returns MyDataViewCtrl instance
print(event.GetEventObject()) # Returns None
print(event.GetValue()) # Returns <Swig Object of type 'wxVariant *' at 0x7fffa340a0d0>
print(self._model.GetValue(event.GetItem(), 0)) # Returns column 0 of the row this was dropped on
print(event.GetItem()) # Returns the wx.dataview.DataViewItem this was dropped on
print(event.GetDataBuffer()) # Returns <Swig Object of type 'void *' at 0x1a59b30>
谢谢,你能给我一个提示如何做到这一点(即从缓冲区获取数据)? – 2015-02-24 16:17:51
对不起,我不知道如何在Python中做到这一点。让我们希望罗宾可以解决[你的机票](http://trac.wxwidgets.org/ticket/16881)。 – 2015-02-25 14:16:25