[wxPython-users] wx.HtmlListBox with wxp tags not possible?

[Robin Dunn]

Stani's Python Editor wrote:
> Hi,
> Did anyone succeed to make wx.HtmlListBox work with wxp tags? As an 
> example, replace the code for MyHtmlListBox(wx.HtmlListBox) with:
> 
> import wx.lib.wxpTag
> 
> class MyHtmlListBox(wx.HtmlListBox):
> 
>    def OnGetItem(self, n):
>        return """<wxp module="wx" class="Button" width="50%">
>    <param name="label" value="It works!">
>    <param name="id"    value="-1">
> </wxp>
> """
> 

Looks like there is some code in wxHtmlWidgetCell that assumes that the 
parent of the widget will always be a wxScrolledWindow, and it is 
typecasting the parent pointer to that type in order to call 
GetViewStart.  Since the wx.HtmlListBox doesn't derive from 
wxScrolledWindow this can cause a crash, or at least unstable behavior.

> If this is not possible, could it be implemented by a 
> wx.html.HtmlWinTagHandler?

That is how the wxp tag handler is implemented already.


> 
> Also I noted the existence of wx.SimpleHtmlListBox. Is this an internal 
> class or can it be used?

It can be used.  Basically it is a wx.HtmlListBox that you don't need to 
derive from and override methods to be able to use.  You just set item 
values like a normal listbox.


-- 
Robin Dunn
Software Craftsman
http://wxPython.org  Java give you jitters?  Relax with wxPython!