Re: OnIdle() alternatives

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>
Fri, 23 Jun 2006 15:25:41 -0400
Newsgroupie wrote:

Hello Newsgroupies,

I am using a derivative of OnIdle() in the CWinApp class to service a
series of multi-threaded CEvent/CMutex controlled data queues. However,
whenever a modal dialog pops up or a menu item is selected or even a
scroll bar is used the OnIdle() stops being called.

Even if I use a WM_TIMER event instead to crank the servicing it does
not always get through. And WM_KICKIDLE doesn't seem to be too reliable

Can anyone recommend a better way to service these multi-threaded
events so that general Windows GUI actions don't interfere with it?

Many thanks in advance!


If you must process the events & queues in the GUI thread then your best
bet is probably a user-defined message posted to the main window. (Use
ON_MESSAGE in the message map.) I've never seen these fail to get
serviced and they have higher message queue priority than OnIdle,
OnTimer and OnPaint.

Scott McPhillips [VC++ MVP]

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