Stop the IDE from syncing editor tabs across two source editors?
lazarus / 9-Editor

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EganSolo · 2025-07-25 00:14

My IDE setup when editing includes two source editor windows. I tend
to clone a tab across these and find it helpful to look at a piece of
code in one editor while working on another piece in another editor.
For instance, suppose I have a project with three files,
main_form.pas, options.pas and utils.pas

Main editor     : main_form.pas (focused) and options.pas
Second editor : utils.pas (focused) and options.pas

Currently, if I select options.pas in the second editor, the focus in
the main editor will switch to options.pas also. I don't want the
second editor to change the focus of the main editor to a different
file. I looked into tools --> Options and didn't find an obvious box
to tick. Suggestions?

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Martin_fr · 2025-07-25 06:32

Do you have the docked form editor installed? Which version of Lazarus
do you use?

It reminds me off
https://gitlab.com/freepascal.org/lazarus/lazarus/-/issues/39417
But that is believed to be fixed in Lazarus 4...

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EganSolo · 2025-07-25 17:25

Hi Martin,
  Yes, that issue appears to be what I'm dealing with.
  I'm using the docked version of Laz 4.0, build date: 2025-05-29.

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Martin_fr · 2025-07-25 17:52

Just noticed, it is only fixed in trunk.

You can try to apply the changes to your installed IDE.
https://gitlab.com/freepascal.org/lazarus/lazarus/-
/commit/b6498c7031a2af72b383f65b6368117e5d14f904
https://gitlab.com/freepascal.org/lazarus/lazarus/-
/commit/b6498c7031a2af72b383f65b6368117e5d14f904.diff

When I fixed it I couldn't get any feedback, if
1) it works (probably)
2) it introduces other/new problems

I don't use the docked form editor, so I wont ever notice if it breaks
anything else.

So, not knowing if would be safe, I did not merge it into 4.n.

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EganSolo · 2025-07-25 18:20

Thanks, Martin,
I've applied the patch and will let you know what my experience is.

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EganSolo · 2025-07-25 19:58

Martin,
  So far so good. The weird behavior stopped, and I haven't seen
anything untoward. I'll update again after a week. Since I'm in the
editor every day with 20+ tabs open, I'll know if something goes
wrong.

  After aborting a run, if a tab in the second editor is focused and I
press Ctrl+F9, the run button remains disabled after a successful
compilation. To enable it, I have to click on the main editor. To stop
this behavior, I have to close and reopen the IDE.

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Martin_fr · 2025-07-25 20:31

Quote from: EganSolo on July 25, 2025, 09:58:47 pm  After aborting a
run, if a tab in the second editor is focused and I press Ctrl+F9, the
run button remains disabled after a successful compilation. To enable
it, I have to click on the main editor. To stop this behavior, I have
to close and reopen the IDE.

"aborting a run" means
- stop while compiling
- stop while the app is running (terminate app)
?

1) That was like this BEFORE and AFTER the Patch? Or this has STARTED
with the patch?

2) Please report it a as a bug. (Otherwise it might get forgotten)

3) Does it also fix itself if you
- open any menu from the main menu
- select something from the component palette (in case you have it
visible)
?

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EganSolo · 2025-07-29 23:21

It was before and after the patch. So, the patch had no impact.
I'll report it after I figure out a repeatable sequence.
To answer your other questions: Yes, it fixes itself when

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Martin_fr · 2025-08-08 11:51

I merged the current fix for Lazarus 4.4