Hi
the "wxPython in Action" provides a very good explanation as to how to handle this sort of problem using a combination of pure Python threads and the wx.CallAfter function. Also if you want more help on this you can join the wxPython mailing list via
www.wxpython.org.
Here is a small example of what I'm talking about that uses a Queue object to get a background thread to await work from the main gui thread. Note it is VERY important that all GUI updates are performed by the main thread in a wxPython program.
import wximport threadingimport Queue
class WorkerThread(threading.Thread): def __init__(self, callBack): threading.Thread.__init__(self) self.callBack = callBack self.work_queue = Queue.Queue() self.setDaemon(True) def run(self):
wx.CallAfter(self.callBack, "Thread starting up...") work_to_be_done = Truewhile work_to_be_done: req = self.work_queue.get(True) # Go and perform some long lasting task here!
wx.CallAfter(self.callBack, "Sorry I was kind of busy just now!") def helloThere(self): self.work_queue.put_nowait("This could be an object") class MyFrame(
wx.Frame): def __init__(self): wx.Frame.__init__(self, None, -1, "Testing wxCallback and Python threads")self.worker_thread = WorkerThread(self.logMessage)panel = wx.Panel(self)
test_btn = wx.Button(panel, -1, "Hello!") self.log = wx.TextCtrl(panel, -1, "", style=wx.TE_MULTILINE|wx.TE_RICH2|wx.TE_READONLY)sizer = wx.BoxSizer(wx.VERTICAL) sizer.Add(self.log
, 1, wx.EXPAND|wx.ALL, 5) sizer.Add(test_btn, 0, wx.ALIGN_CENTER_HORIZONTAL) panel.SetSizer(sizer)self.Bind(wx.EVT_BUTTON, self.onTestBtn, test_btn) self.Bind(wx.EVT_CLOSE, self.onCloseWindow)
self.worker_thread.start() def onTestBtn(self, evt): self.worker_thread.helloThere() def onCloseWindow(self, evt): self.Destroy() def logMessage(self, msg): self.log.AppendText
(msg) self.log.AppendText("\n") if __name__ == '__main__': app = wx.PySimpleApp() frm = MyFrame() frm.Show() app.MainLoop()
Cheers!!
Dermot.
On 19 Jul 2006 22:52:09 -0700, Frank Millman <[EMAIL PROTECTED]> wrote:
damacy wrote:> hello. i'm using wxPython as my GUI package and whenever my program> executes a long process which takes at least 2 or 3 seconds, the user
> interface gets corrupted while executing the progrocess during the> period.>> i have tried the following lines of code...>> frame = mainwindow(None, -1, 'my program')> ...
> ...> frame.UpdateWindowUI()>> and it did not make any difference at all.>> could anyone help me?I don't really understand the question - what do you mean when you say
the user interface gets corrupted?Nevertheless, the following pointer may help -http://tinyurl.com/hj84lIt is an article in the wxPyWiki that discusses various ways of
handling longrunning tasks.HTHFrank Millman--http://mail.python.org/mailman/listinfo/python-list
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