Lazarus seems to be making some random changes to the positioning of
form items?
lazarus / 10-Designer

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vfclists · 2026-01-07 19:09

I have this problem where after viewing a form in the IDE without
making changes to it, the position of so many objects would have
shifted slightly without any obvious cause.

Normally I expect the just the Top and Left properties of the form to
change, and just one or two items  I have accidentally dragged.

It is very obvious when git notes the .lfm file as having been changed
and dozens of objects have been shifted by a few pixels.

I'm using Lazarus 3.0 on KDE 5 Plasma desktop if it is any relevance
and program's widget set is Qt5. I think something about the desktop
system forces items to be realigned for some unknown reason, or
something in the IDE settings in relation to the desktop setting
triggers the alignment.

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n7800 · 2026-01-14 01:33

Yes, I see this all the time. As far as I know, it happens when
opening projects in different widget sets or even different OS themes.
Usually, when opening projects on the same system (and configuration),
there are no changes.

As a Git user, I also often see property reordering changes (LFM lines
retain their value, but change their order). This happens when opening
a project in a different version of Lazarus. There are reasons why
developers reorder properties in the source code, and LFM files follow
suit.

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Nicole · 2026-01-14 14:28

Dou you use settings as "alClient"?
If yes, try if the problem persists on alNone.

No, this is no solution. You use alClient because you want it.
It is just a searching for connected reasons.

I could "fix"  some layout problems by this change.
However, it is not the layout I want any more.

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Boleeman · 2026-01-15 06:54

When running a program on different computers I uncheck use LCL
scaling in Project options as a quick temporary fix.

For permanent positioning I make use of OnResize event to force
postioning/sizing of some controls (like TPaintbox even though I use
alClient).