[Interest] Finished resizing a window?

[Jason H]

Also, note that the Qt event loop will collapse all pending resizes into one final one. 

You should be able to block updating the layouts until the timer expires. Its been a while but you'll need to subclass the window and don't call the base class resizes until the timer is done.

I don't think the below will work, but like I said, it's been a whole for me working with widgets. 


________________________________
 From: Tony Rietwyk <tony at rightsoft.com.au>
To: interest at qt-project.org 
Sent: Monday, February 24, 2014 6:45 PM
Subject: Re: [Interest] Finished resizing a window?
 


Hi John, 
 
I would suggest a short single-shot timer roughly:
 
resizeEvent
                base::resizeEvent
                if !mTimer.isRunning
                                mTimer.start
 
paintEvent
                if !mTimer.isRunning
                                base::paintEvent
 
timer slot:
                repaint
 
I'm not sure whether overriding the paintEvent is enough to prevent the child widgets from painting. 
 
Good luck - please let the group know what you decide with this. 
 
Tony
 
 
From:interest-bounces+tony=rightsoft.com.au at qt-project.org [mailto:interest-bounces+tony=rightsoft.com.au at qt-project.org] On Behalf Of John Weeks
Sent: Tuesday, 25 February 2014 8:56 AM
To: Interest at qt-project.org Interest
Subject: [Interest] Finished resizing a window?
 
We have windows in our application that are potentially expensive to repaint, so when the user resizes a window we may need to put off repainting until the resizing is finished. It seems that we don't get mouse down/mouse up events when the user clicks in the window frame/resize grip area, so I can't wait until mouse up.
 
Is that correct?
Is there a solution to this?
 
Thanks!
 
-John Weeks
 

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