a few bugs

[95656]

Sometimes the synchronous calculation of the rectangular area fails

[githubuser0xFFFF]

Thank you for this pull request. I cannot reproduce the problem here, so maybe it is related to your application. Can you post a video that I can understand the intention of this pull request?

[95656]

Thank you for this pull request. I cannot reproduce the problem here, so maybe it is related to your application. Can you post a video that I can understand the intention of this pull request?

You should add many tab widgets.
This problem is reproduced when the length of the tab bar exceeds the length of the QSrcollArea's viewport

[githubuser0xFFFF]

Should I test this under Windows or Linux or is it reproducible on both systems?

[95656]

Should I test this under Windows or Linux or is it reproducible on both systems?

windows

[githubuser0xFFFF]

Please describe the exact steps I need to do to reproduce the problem that you try to solve with this change:

		QTimer::singleShot(0, [&, TabWidget]{
			    _this->ensureWidgetVisible(TabWidget);
			});

If I cannot reproduce the problem here, I will not merge this change - sorry.

[95656]

Please describe the exact steps I need to do to reproduce the problem that you try to solve with this change:

		QTimer::singleShot(0, [&, TabWidget]{
			    _this->ensureWidgetVisible(TabWidget);
			});

If I cannot reproduce the problem here, I will not merge this change - sorry.

Before modification


After modification

[githubuser0xFFFF]

Thank you for your bug fixes. I was able to reproduce the problem here and merged your changes.

[sarimisar]

This fix seems to have introduced a regression when _this is deleted before the lambda slot occurred, for example deleting the DockManager (and consequently _this) immediately after the execution of updateTabs function (we encountered this problem in our software). A safer solution can be the following:

QTimer::singleShot(0, _this, [&, TabWidget]{
   _this->ensureWidgetVisible(TabWidget);
});