On 2/20/07, Diez B. Roggisch <[EMAIL PROTECTED]> wrote: > cyberco wrote: > > > In my wxPython app a non-GUI thread (that reads info from the network) > > tries to open a frame to show the new info. This results in my app > > hanging (which is not too surprising). Coming from a C# environment I > > wonder if there is some sort of delegate mechanism in wxPython to do > > this sort of thing. > > Not sure how wx deals with this, but one thing you might explore is the > possibility to add a timer in the GUI-thread, that polls a thread-filled > queue. > > Other toolkits as Qt have means to insert an extra event in the event queue > of the gui-thread in a thread-agnostic way, maybe wx has that too. > > Googling... > ... > ... > ... > > ... finished > > http://mail.python.org/pipermail/python-list/2005-August/335467.html > > """ > You need another way to pass completion information between the downloader > thread and the main thread; the simplest way is to define a custom wx > Event, and wxPostEvent from the downloader thread when it completes ( > and when the gauge should be updated). wxPostEvent is safe to call from > non-eventloop threads. > The main thread's wx event loop just spins, properly updating all other > parts of the GUI, and receiving events from the downloader thread. > > ANother approach is to have a thread-safe Queue and have the main > thread/event loop > poll the queue with queue.get_nowait() periodically (typically 0.1-1 sec). > The downloader thread shares the queue object and puts data structures > (typically > class instances, strings, or ints) that indicate status updates. > """ > > So - both options a viable. And read to the end, the twisted-approach > certainly is the most clean one. >
This is rather out of date. wxPython provides a wx.CallAfter function, which will call the passed callable on the next spin through the event loop. It's essentially a wrapper around the custom event mechanism described above. > Diez > -- > http://mail.python.org/mailman/listinfo/python-list > -- http://mail.python.org/mailman/listinfo/python-list
