QToolbar resizing

Alexey Serebryakov

Hi all,

I have own implementation of docking window subsystem and main window, use QMainWindow as main window of application was rejected. But using QToolbar as well.

Then I noticed when I try to resize to minimum main window (parent for my toolbar), there was appeared ">>" button on the right side of toolbar, but when I've tried click was nothing happened.

What's wrong? Seems to me that part of code implements in QMainWindow? Where that handled? Please point me to peace of source code of Qt.

Thanks a lot,
Alex

Pl45m4

@Alexey-Serebryakov

Apparently it's called extension button

When a toolbar is resized in such a way that it is too small to

show all the items it contains, an extension button will appear as

the last item in the toolbar. Pressing the extension button will

pop up a menu containing the items that do not currently fit in

the toolbar.

Check line 409 from: https://code.woboq.org/qt5/qtbase/src/widgets/widgets/qtoolbar.cpp.html#409

If you read further:

When a QToolBar is not a child of a QMainWindow, it loses the ability

to populate the extension pop up with widgets added to the toolbar using

addWidget(). Please use widget actions created by inheriting QWidgetAction

and implementing QWidgetAction::createWidget() instead.

So this is the case here :) Because as you've said, you don't have a QMainWindow based "main" window. But you could try what they suggest (QWidgetActions + createWidget())

Pl45m4

@Alexey-Serebryakov said in Toolbar:

QMainWindow as main window of application was rejected

Rejected by whom?

Then I noticed when I try to resize to minimum main window (parent for my toolbar), there was appeared ">>" button on the right side of toolbar, but when I've tried click was nothing happened.

Do you actually use your toolBar? Do you have items / actions in it?

If I'm not mistaken this is to expand or show (and use) your items in your toolBar even when the toolBar is too small to show all its items.

Please point me to peace of source code of Qt.

Have a look yourself :)
Haven't found it yet.
It could also come from your OS (I dont know if it is a Qt thing).

ToolBar

https://code.woboq.org/qt5/qtbase/src/widgets/widgets/qtoolbar.cpp.html

MainWindow

https://code.woboq.org/qt5/qtbase/src/widgets/widgets/qmainwindow.cpp.html

Alexey Serebryakov

@Pl45m4

We've decided to use own implementation of main window of application, not QMainWindow.

Sure, we use QToolbar with actions/items. And when I resized main window too small toolbar resized too, some items disappeared and appeared ">>" button.

But when I clicked then nothing happened. I'm not suer that it OS-platform specific, this is Qt feature. I wish to find where that handled in Qt source code.

Pl45m4