atom feed8 messages in com.googlegroups.wxpython-usersRe: [wxPython-users] Notebook problem...
FromSent OnAttachments
Barry ScottFeb 13, 2010 3:20 pm 
Fahlgren, EricFeb 13, 2010 6:33 pm 
Barry ScottFeb 14, 2010 2:50 am 
Robin DunnFeb 15, 2010 11:51 pm 
Barry ScottFeb 16, 2010 1:44 am 
Christopher BarkerFeb 17, 2010 1:50 pm 
duncan smithFeb 17, 2010 6:49 pm 
Robin DunnFeb 18, 2010 12:59 pm 
Subject:Re: [wxPython-users] Notebook problem on XP
From:Robin Dunn ("
Date:Feb 18, 2010 12:59:02 pm

On 2/17/10 6:49 PM, duncan smith wrote:

Hello, I've been struggling to get the desired behaviour with notebooks on XP for a while now. I'm hoping for a few pointers.

Basically I have workspace objects each of which which contains a list of drawable graph objects, each containing a canvas. I have a notebook with number of tabs equal to the length of the above lists. When I want to make a workspace 'active' I remove the current pages in the notebook and create new pages containing the relevant canvases (all canvases have the notebook as parent). i.e.

for i in range(self.notebook1.GetPageCount()): self.notebook1.RemovePage(0) for i, dg in enumerate(ws.drawable_graphs): self.notebook1.AddPage(dg.canvas, ws.labels[i])

This works fine on Linux (Ubuntu). The workspace is opened and I can switch between tabs and work with my canvases no problem.

Firstly, on XP I have problems removing pages.

Traceback (most recent call last): File "C:\repos\impact_engine\trunk\BNPy\", line 375, in OnWSItem self.makeActive(self.getWorkspace(name)) File "C:\repos\impact_engine\trunk\BNPy\", line 267, in makeActive self.notebook1.RemovePage(i) File "C:\Python25\lib\site-packages\wx-2.8-msw-unicode\wx\", line 3002, in RemovePage return _controls_.BookCtrlBase_RemovePage(*args, **kwargs) wx._core.PyAssertionError: C++ assertion "wxAssertFailure" failed at ..\..\src\msw\notebook.cpp(733) in wxNotebook::DoRemovePage()

For some reason removing pages in the reverse order that they were added usually works, but I still get the above exception quite frequently (possibly after having switched between tabs).

Try just calling DeleteAllPages instead of your loop.

A second, and I guess related issue, is that when I switch between tabs I don't always see the correct canvas displayed. But the correct canvases are associated with the correct tabs. When I switch between tabs a handler is called that may or may not refresh the canvas. It seems that if the canvas is refreshed it requires a mouse click on the canvas area for it to display. If it hasn't been refreshed I can't get to the correct canvas at all.

Please make a small runnable sample that demonstrates this problem.