Processing system messages?

wxPython Users
1

Hello.

In the application that I'm writing, I'm traversing a directory tree.
Obviously, this is done using a recursive algorithm and this can take
some time. When I call the method which walks the tree, I cannot move
the window of my application around. Also, when I move another window
over it, my applications window doesn't redraw.

What can I do to make wxPython/wxWindows process system messages, so
that I can move the window and that the window redraws?

Thanks,

Alexander Skwar

···

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2

Place a call to wx.wxYield() inside of the long running loop.
for x in range(lots):
    do stuff
    wx.Yield()

I saw reference to a safe yeild in the wxWindows docs too, but have not
studied up on it.

···

----- Original Message -----
From: "Alexander Skwar" <lists.ASkwar@email-server.info>
To: "wxPython Mailingliste" <wxPython-users@lists.wxwindows.org>
Sent: Saturday, March 08, 2003 6:01 PM
Subject: [wxPython-users] Processing system messages?

Hello.

In the application that I'm writing, I'm traversing a directory tree.
Obviously, this is done using a recursive algorithm and this can take
some time. When I call the method which walks the tree, I cannot move
the window of my application around. Also, when I move another window
over it, my applications window doesn't redraw.

What can I do to make wxPython/wxWindows process system messages, so
that I can move the window and that the window redraws?

Thanks,

Alexander Skwar

3

So sprach Joe Brown am 2003-03-08 um 18:11:41 -0500 :

Place a call to wx.wxYield() inside of the long running loop.

Thanks, works good!

However, just like described in the documentation, the app is now "too
responsive". With this, I mean that I'm now able to change things like
checkboxes on the frame. There's also wxSafeYield which is supposed to
"fix" this - however, when I call wxSafeYield instead of wxYield, I can
no longer move the window (on Windows). Guess I'll have to figure out a
loop which disables all the controls on the frame prior to calling this
method.

Alexander Skwar

···

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4

So sprach Joe Brown am 2003-03-08 um 18:11:41 -0500 :

Place a call to wx.wxYield() inside of the long running loop.

This calls ::wxYield, doesn't it? In the documentation, it says that
wxApp::wxYield should be called instead. I'm trying to do all this from
within a method which is in a module containg my frame. The applicaiton
itself just imports the module with the frame and calls frame.create().

How can I get a handle to the application (wxApp) object from within the
frame?

Thanks,

Alexander Skwar

···

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5

Alexander Skwar wrote:

So sprach Joe Brown am 2003-03-08 um 18:11:41 -0500 :

Place a call to wx.wxYield() inside of the long running loop.

This calls ::wxYield, doesn't it? In the documentation, it says that
wxApp::wxYield should be called instead. I'm trying to do all this from
within a method which is in a module containg my frame. The applicaiton
itself just imports the module with the frame and calls frame.create().

How can I get a handle to the application (wxApp) object from within the
frame?

wxGetApp()

···

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