Difference in formatting TForm Windows - Linux

[Hansvb]

Hi
I'm making a tool that will work on Windows 11 and Linux (Ubuntu, Lazarus on Ubuntu uses QT5). I run into the fact that if I align the components neatly on TForm in Windows, they will overlap in Linux. See the attachements. One difference I see is the font size. It seems to be larger in Linux than in Windows, but reducing it does not seem to solve the overlap.

What are the tips to build a form (view) neatly so that it looks good in Windows and Linux. Should I start thinking about the anchor editor?

[Bart]

Should I start thinking about the anchor editor?

Yes.

Bart

[Hansvb]

Yes.

Great, work to be done

[cdbc]

Hi
That's good advice from Bart =^
I can say, that I've tried quite a few different widgetsets ...and window-managers in Linux and it's kind of a rule, that they differ, some much and some not so much, but differ -- That they do!
I guess that, to completely alleviate that, we'd have to resort to 'fpGUI' or 'mseGUI', as they're drawn from scratch...  <<Oh Boy>>
Well, I wish you a fun time, coming to grips with Anchor(s) & -docking 
Tjuh, Tjuh, Tjuuuhhhh...
Regards Benny

[Fred vS]

I guess that, to completely alleviate that, we'd have to resort to 'fpGUI' or 'mseGUI', as they're drawn from scratch...

And without any dependencies, with source code written in Pascal... 

[Hartmut]

I had the same problem when I ported my existing Windows GUI programs later to Linux (Ubuntu GTK2). I solved it mostly with the following 2 procedures:

Code: Pascal  [Select][+][-]

1. procedure setFormFonts_Default(F: TForm);
2.    {sets on Linux the Font and Font Height of all GUI-Controls of a Form to my personal Defaults}
3.    begin
4. {$IFDEF LINUX}
5.    F.Font.Name:='Noto Sans';
6.    F.Font.Height:=12;
7. {$ENDIF}
8.    end;

The 1st procedure changes on Linux the Font and Font Height for 1 Form, which normally is inherited to all GUI-Controls of that Form, because they normally have 'ParentFont=True'. In many cases that's all what I need to call this procedure once for every Form.

But if you change something in the Font of a GUI-Control (e.g. the 'Font.Color'), then this automatically changes it's 'ParentFont:=False' and above procedure does not longer work for that GUI-Control. In this case I call the following procedure afterwards:

Code: Pascal  [Select][+][-]

1. procedure setFormControls_Font_Height(F: TForm; name: string; height: integer);
2.    {sets for all GUI-Controls of a Form a certain Font Name and Font Height}
3.    var C: TComponent;
4.        i: integer;
5.    begin
6.    for i:=0 to F.ComponentCount-1 do
7.       begin
8.       C:=F.Components[i];
9.       if C is TControl then
10.          begin
11.          TControl(C).Font.Name:=name;
12.          TControl(C).Font.Height:=height;
13.          end;
14.       end;
15.    end;