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TScrollBox produces ugly artifacts when scrolling
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Topic: TScrollBox produces ugly artifacts when scrolling (Read 544 times)
Superdisk
Jr. Member
Posts: 73
TScrollBox produces ugly artifacts when scrolling
«
on:
August 12, 2022, 03:45:59 am »
When I put an image in a TScrollBox and scroll around, it produces repainting artifacts. This effect is more pronounced on other controls like a custom-drawn one I have, but this demonstrates is more clearly.
Is there any way to prevent this from happening? MS Paint for instance doesn't have this problem.
You can view the gif here:
https://nickfa.ro/images/Ugly.gif
The project file is here:
https://nickfa.ro/images/ScrollBoxArtifacts.zip
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jamie
Hero Member
Posts: 6133
Re: TScrollBox produces ugly artifacts when scrolling
«
Reply #1 on:
August 13, 2022, 04:48:09 pm »
All I see it overlap due to the steps in the vertical control.
have you set the Scroll bars to smooth scrolling?
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The only true wisdom is knowing you know nothing
Handoko
Hero Member
Posts: 5154
My goal: build my own game engine using Lazarus
Re: TScrollBox produces ugly artifacts when scrolling
«
Reply #2 on:
August 13, 2022, 05:24:48 pm »
I downloaded and tested the code, it run ok on my Ubuntu Mate 22.04. Maybe the computer did not have correct VGA driver installed, or maybe virus/antivirus issue.
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wp
Hero Member
Posts: 11916
Re: TScrollBox produces ugly artifacts when scrolling
«
Reply #3 on:
August 13, 2022, 06:51:32 pm »
Scrolls perfectly on Windows 11 (at least it is my impression).
«
Last Edit: August 13, 2022, 07:44:23 pm by wp
»
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