Problem with Spktoolbar blinking

[danielaemtranse]

Help me!

I use SpkToolbar (version 0.1. on Windows 11.

When I move the mouse over the buttons, the whole component blinks, I don't have this behavior on Ubuntu.

[Zoran]

This is a ccr component, so you can report here: https://gitlab.com/freepascal.org/lazarus/ccr/-/issues

[wp]

I use SpkToolbar (version 0.1.8 ) on Windows 11.

When I move the mouse over the buttons, the whole component blinks, I don't have this behavior on Ubuntu.

I cannot confirm this with the demo applications which come with SpkToolbar (same SpkToolbar version, Windows 11 as well). What are you doing? Please post a small sample project demonstrating the issue.

[danielaemtranse]

I have this problem even if I run the sample project that comes with Spktoolbar, see the attached video

[wp]

The DoubleBuffered property could be the culprit. By default it is on (true), but when I turn it off I can produce a similar effect like in your video. This is not a published property and thus cannot be set in the Object Inspector. So please search your code for something like "DoubleBuffered" and comment out this line/these lines if it refers to SpkToolbar.

[dseligo]

I also experienced this problem several times, but I don't recall in what circumstances was that.

I am sure I didn't touch DoubleBuffered property. I experimented with dark mode (with uWin32WidgetSetDark unit from Double Commander by Alexander Koblov), and in that unit is this function:

Code: Pascal  [Select][+][-]

1. class function TWin32WSCustomFormDark.CreateHandle(
2.   const AWinControl: TWinControl; const AParams: TCreateParams): HWND;
3. var
4.   Info: PWin32WindowInfo;
5. begin
6.   AWinControl.DoubleBuffered:= True;
7.  
8. ...

This function turns DoubleBuffered property to True, but maybe there are some other components/packages which changes DoubleBuffered property to False ("behind user's back" so to speak), and consequence is 'blinking' which OP experiences.

[danielaemtranse]

Thank you a lot, it worked for me.