[Interest] QTimer pauses when window minimum

[Arunprasad Rajkumar]

On 14 March 2013 12:32, 程梁 <devbean at outlook.com> wrote:

> Yeah, I mean when you clicked minimum button on right top of the window.
>
> I'm developing a monitor system with real time chart so the chart should
> be updated no matter the window is visible or just in minimized state
>
Where it need to be updated ?. To disk or Network?


> . If most windowing system optimize this, I think I should draw the chart
> in memory in order to update the whole chart when the window is visible.
> This might be one of solutions.
>
You can use QPixmap; Get the QPainter from it & draw without worrying about
paintEvent.

>
>
> Cheng Liang
> Nanjing, China
> http://www.devbean.net
>
> ------------------------------
> Date: Thu, 14 Mar 2013 10:06:34 +0530
>
> Subject: Re: [Interest] QTimer pauses when window minimum
> From: ararunprasad at gmail.com
> To: devbean at outlook.com
> CC: interest at qt-project.org
>
>
> >But when the window minimum QTimer stops and paintEvent() could not be
> called.
> Whether your window is in minimized state?. When window is in minimized
> state it is not visible in screen. Then why you need a paint? Basically
> most of the windowing system optimizes by not sending paintevent when
> window is in minimized state.
>
>
> On 14 March 2013 08:36, 程梁 <devbean at outlook.com> wrote:
>
> Hi, there! In my application I need to update UI every 2s. I use QTimer to
> implement this feature. But when the window minimum QTimer stops and
> paintEvent() could not be called. How could I solve this problem? Or could
> you tell me something else to get this feature?
>
> Thank you!
>
> Cheng Liang
> Nanjing, China
> http://www.devbean.net
>
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>
>
> --
> *Arunprasad Rajkumar*
> http://in.linkedin.com/in/ararunprasad
>



-- 
*Arunprasad Rajkumar*
http://in.linkedin.com/in/ararunprasad
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