Flicker on Windows

[theAndreas]

Hello,

at the moment I am trying to develop a small Wordclock simulator. I started creating a frame based Application.



The window should be refreshed every second. The problem is that I have a lot of flicker on Windows. On Linux its working great.

I also took a look inside the wxWiki https://wiki.wxwidgets.org/Flicker-Free_Drawing but that was not helpful at all.

I am using wxWidgets-3.0.3 and Windows 7

Is there something else what can be done?

Thanks for help!

Best regards Andreas

[doublemax]

Do you get only flicker when you resize the frame or on every refresh?

I tested it under Window7 and i only get flicker on resize - which will be hard to avoid when using standard controls for the display.

To avoid flicker 100% you'll have to avoid the use of standard controls and use a panel with custom drawing instead. Depending on what features you might want to add, that's probably the most flexible solution anyway.

[theAndreas]

I get flicker on every refresh. Could you please try to set the Timer to a smaller value maybe 100. Then the flicker should get stronger.

Flicker on resize is not so a big problem. But flicker on every refresh is really ugly.

I already have read some posts about the problem with the standard controls. That's a pity because I really like wxWidgets, but that's not so nice. I hope this will be fixed in the next releases.

[doublemax]

Could you please try to set the Timer to a smaller value maybe 100. Then the flicker should get stronger.

No flicker for me on any refresh rate. Could be because i have Aero switched off.

That's a pity because I really like wxWidgets, but that's not so nice. I hope this will be fixed in the next releases.

This is very unlikely to change, it's a conceptional problem.

Can you try calling SetDoubleBuffered(true) on the frame?

[theAndreas]

Can you try calling SetDoubleBuffered(true) on the frame?

Thanks for the tip. This is really interesting: After adding SetDoubleBuffered the flicker is gone. But as soon as I change the size of the window, the flicker appears again on every refresh. But why?

Turned off Aero and also no flicker any more . Seems to me its the only helpful option.