wxPython Crashes with multiple instances

[Darkster]

Hi guys,
 
When I try to run a wxpython GUI (like the one below) it crashes Houdini if I run it twice without closing the original.
 
I'm using the method described in the docs to run it in a separate thread so it doesn't lock up Houdini. I've tried using a  wx.SingleInstanceChecker(), but I'm not sure how to properly integrate it into my scripts.

 

Has anyone encountered this problem before and/or have any solutions?
 
Test code:

import wx

class testFrame(wx.Frame):
    def __init__(self, *args, **kwds):
        kwds["style"] = wx.DEFAULT_FRAME_STYLE
        wx.Frame.__init__(self, *args, **kwds)
        self.button_test = wx.Button(self, wx.ID_ANY, "Click me!")
        self.SetTitle("Crashing Test Frame")
        self.SetSize((100, 100))

        self.Bind(wx.EVT_BUTTON, self.evt_test, self.button_test)
        
        sizer_test = wx.BoxSizer(wx.VERTICAL)
        sizer_test.Add(self.button_test, 0, wx.ALL | wx.ALIGN_CENTER_HORIZONTAL | wx.ALIGN_CENTER_VERTICAL | wx.ADJUST_MINSIZE, 20)
        self.SetSizer(sizer_test)
        self.Layout()

    def evt_test(self, event):
        print "Click"


def runWxApp(app, window):

    def processWxEvents():
        while event_loop.Pending():
            event_loop.Dispatch()
            app.ProcessPendingEvents()

    def onClose(event):
        window.Show(False)
        window.Destroy()
        processWxEvents()
        hou.ui.removeEventLoopCallback(processWxEvents)
    window.Bind(wx.EVT_CLOSE, onClose)

    event_loop = wx.EventLoop()
    wx.EventLoop.SetActive(event_loop)
    hou.ui.addEventLoopCallback(processWxEvents)


app = wx.PySimpleApp()
frame = testFrame(None, wx.ID_ANY, "testFrame")
frame.Show()
runWxApp(app, frame)

 

I'm running Linux Centos 6 & Houdini 13.0.376

 

Any help would be appreciated.

[Stalkerx777]

Some time ago i'he been using wxPython. Haven't any problem with that. I'l try your code on my machine.

 

UP. Yes, it hangs in case of multiple instances. I think i't possible to fix, i'l check it out later.

Edited September 4, 2014 by Stalkerx777

[Darkster]

Thanks for taking a look.

 

At the moment it's not much of a issue, it's just very annoying when it happens. Normally I force the GUI window to always stay on top, so this issue is normally not a problem, but it's easy to forget you have a GUI open if it's minimized or you don't have always.