WxTreeControlArrowKeyBug

Introduction

The wxTreeCtrl has a bug in its arrow keys.

What Objects are Involved

Uh, the wxTreeCtrl

Process Overview

The "correct" keystrokes for a tree control are:

• Down select the prior visible item

• Left if the current node's expanded it collapses, else select the prior visible item

• Right if the current node's collapsed it expands, else select the next visible item

• Up select the next visible item

Special Concerns

The wxTreeCtrl gets Left wrong. It does not opt to collapse.

The following sample works if you have inherited the tree control; otherwise refactor the 'self.' and adjust the binding. I added this to the ListAndTreeControls example.

Code Sample

        def __init__(
                ... blah blah blah
                EVT_KEY_DOWN(self, self.OnKey)
                ...

        def OnKey(self, event):
            'On <Left>, if the current item is expanded, collapse it'
            
            key = event.KeyCode()
            
            if key == WXK_LEFT:
                ID = self.GetSelection()
                
                if self.IsExpanded(ID):
                    self.Collapse(ID)
                    return
           
            event.Skip()

Comments

It'd be nice if someone promoted this patch back up to the source (WxGtk) instead of only fixing it down here in the python.

--PhlIp

It seems to have been fixed now.. (well, the bindings are correct in the latest wxPython demo, and I can't see anything resembling your fix in the code)

--JohnFouhy