Hello.

I want to use the drag&drop feature into the HyperTreeList. I get the same errors I get when using the HyperTreeList demo in the package wxPython-demo-4.0.0a2.dev3038+953a2e5.
I am using Phoenix 4 and Python 3.5 in Windows 10 native on a i5@2,2GHz with 8GB of RAM.
Having checked the EVT_TREE_BEGIN_DRAG and EVT_TREE_END_DRAG events , when I attempt to drag a simple item from one node to another I get the following errors:
Traceback (most recent call last):
File "C:\TOOLS\python\python35\lib\site-packages\wx\lib\agw\hypertreelist.py", line 3528, in OnMouse
self._dragImage.BeginDrag(wx.Point(0,0), self)
wx._core.wxAssertionError: C++ assertion "Assert failure" failed at ....\src\common\wincmn.cpp(3346) in DoNotifyWindowAboutCaptureLost(): window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST
Traceback (most recent call last):
File "C:\TOOLS\python\python35\lib\site-packages\wx\lib\agw\hypertreelist.py", line 3608, in OnMouse
self.ReleaseMouse()
wx._core.wxAssertionError: C++ assertion "!wxMouseCapture::stack.empty()" failed at ....\src\common\wincmn.cpp(3319) in wxWindowBase::ReleaseMouse(): Releasing mouse capture but capture stack empty?
"
Googling I found out the wx.lib.agw.aui.AuiNotebook had a very similar issue. Some possible solution (see #321 ) involved moving the self.HasCapture/self.ReleaseMouse after the self._dragImage.EndDrag() in the OnMouse handler.
By doing that I got rid of the "Releasing mouse capture but capture stack empty?" error message but I was left with the wxEVT_MOUSE_CAPTURE_LOST error message.
I am not sure how to proceed...
Are you aware of this issue? Do you have any idea on how to solve it?

Thank you.