Flickering TScrollbox

[kupferstecher]

Hi,

there is flickering inside a TScrollbox when I set a quantity of controls to visible:= false. Its reproducable, see the attached example project. The flickering occurs on and near to the border of the scrollbox.
DoubleBuffered:= true also doesn't help.

It seems to be fine for BorderStyle:= bsNone. But in the standard configuration (bsSingle) there is this annoying flickering.

Does anyone know how to solve that?

Regards

PS: Same behaviour on Win Vista 32bit, Lazarus 1.6.4
and on Win7 64bit, Lazarus 1.6.

[Thaddy]

Seems to be an off-by-one bug in the case of a border.

[kupferstecher]

Hm, could be.
Now I also testet on Linux with qt, there the flickering doesn't occur.

[ASerge]

there is flickering inside a TScrollbox when I set a quantity of controls to visible:= false.

Framing with ScrollBox1.DisableAutoSizing and ScrollBox1.EnableAutoSizing will help.

[kupferstecher]

Hello ASerge,

now I tried that, for hiding the controls your solution works. But for enabling the visibility there still is flicker.

For now I just use the scrollbox without frame.

Regards

Framing with ScrollBox1.DisableAutoSizing and ScrollBox1.EnableAutoSizing will help.

[airpas]

i got lot of flickering too with Splitters when it's linked with many controls . i think the procedure TCustomSplitter.MoveSplitter is unoptimized , there is alot of code inside this procedure .

[Handoko]

I cannot reproduce the issue on Linux Gtk2.