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Author Topic: Virtual Tree View blurs the headers when resizing  (Read 1382 times)

Gustavo 'Gus' Carreno

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Virtual Tree View blurs the headers when resizing
« on: December 22, 2023, 08:50:59 pm »
Hey Y'all,

This has been bugging me for quite a while, but I never quite got to come here and ask about it.

Now that I'm actually working on a small app that uses the Virtual Tree View that comes packaged with Lazarus, this as come to my attention again.
This is even a problem with OPM, since it, also, uses the same supplied package.

As you can see from the image attached, when one resizes the headers, the text that moves gets all blurred.

This happens on the Ubuntu 23.10 x86_64 with a dark theme. Not sure if the theme has anything to do about it, but I guess it doesn't hurt to mention it.

Just another question: Why is it that the background of said headers is black? If I remember correctly, the other packages available on OPM do not have the header's background as black.

I, sincerely, hope that someone can point me in the right direction to have this issue resolved.

As per usual, many MANY thanks for anything in advance!!

Cheers,
Gus
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Lazarus 3.99(main) FPC 3.3.1(main) Ubuntu 23.10 64b Dark Theme
Lazarus 3.0.0(stable) FPC 3.2.2(stable) Ubuntu 23.10 64b Dark Theme
http://github.com/gcarreno

zeljko

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Re: Virtual Tree View blurs the headers when resizing
« Reply #1 on: December 23, 2023, 02:55:11 pm »
What is widgetset ? gtk2 or qt(4,5,6) ?
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Gustavo 'Gus' Carreno

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Re: Virtual Tree View blurs the headers when resizing
« Reply #2 on: December 24, 2023, 12:14:04 am »
Hey zeljko,

Quote from: zeljko on December 23, 2023, 02:55:11 pm
What is widgetset ? gtk2 or qt(4,5,6) ?

You're quite right in asking, and this was a memory slip on my part.

By default I'm always on the default GTK2.

Cheers,
Gus
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Lazarus 3.99(main) FPC 3.3.1(main) Ubuntu 23.10 64b Dark Theme
Lazarus 3.0.0(stable) FPC 3.2.2(stable) Ubuntu 23.10 64b Dark Theme
http://github.com/gcarreno

anse

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Re: Virtual Tree View blurs the headers when resizing
« Reply #3 on: April 17, 2025, 05:54:55 pm »
I have the same "header blur" issue with VirtualTree + Lazarus 3.8 on Ubuntu 24.04 with gtk2.
I would like to ask whether there is something I can do to prevent that issue?
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