[SOLVED] TPanel and UI performance

[FrankBKK]

I have an older 32bit app compiled with Lazarus 2.0.12 and recompiled it with Lazarus 3.0 on 64bit -
everything worked fine until I thought about giving the UI a facelift.

The app has three forms, three TPageControls with six TTabsheets each and around 100 various components, mostly TLabel, TEdit, some grids etc.
I slapped five Panels and four TSplitter on each TabSheet, to better organize all the components and allow the user to adjust panel sizes.

As a result the whole app now runs rather sluggish and when moving a splitter during runtime it looks like slow motion.
On some heavily loaded panels you can literally watch how the elements are redrawn ...

Do I simply have to use them more sparsely or are there better options ?

[d7_2_laz]

@FrankBKK,  i’d suspect your Splitters ResizeStyle is set to rsUpdate, which might introduce masses of Redraws of Panel & co.
Use ResizeStyle rsLine instead.

[FrankBKK]

@FrankBKK,  i’d suspect your Splitters ResizeStyle is set to rsUpdate, which might introduce masses of Redraws of Panel & co.
Use ResizeStyle rsLine instead.

Thank you so much - that was indeed the problem - I was not aware of this option !