QDockWidget setTitleBarWidget() example with "default" button style

[gde23]

Hello,

I want to add a maximize-button to the QDockWidget titlebar that calls QDockWidget::showFullScreen();

However I cannot find any example that shows how to set up a custom titlebar widget including buttons that look like usually. (the widget should contain all the things that are there by default (icon, title-string, close and dock button) as well as the additional maximize button.

I can add buttons like this

QWidget *title_bar = new QWidget();
QHBoxLayout* layout = new QHBoxLayout();
title_bar->setLayout(layout);
layout->addWidget(new QToolButton());

but then they do not look like the auto generated ones when using the default titlebar.

[SGaist]

Hi,

Dock widgets are not meant to show standard widget decoration and thus controls.

Can you explain your use case ?

[gde23]

Hi,

I simply want to add a maximize button to the dockWidget so i can undock it and then click on the button to make it fullscreen.

Like the button on the mainwindow (red circle) also on the dockwidget.

[SGaist]

Then you can design your own and use setTitleBarWidget.

[gde23]

But how do i make the buttons on my own titlebarwidget look like those in the screenshot above?
I can get the functionality I need by doing something like this:

QWidget *title_bar = new QWidget();
QHBoxLayout* layout = new QHBoxLayout();
title_bar->setLayout(layout);
layout->addWidget(new QPushButton());
dock_widget->setTitleBarWidget(title_bar);

but then the button will look like a normal button and not like the other titelbar-buttons on the dock widgets.
So the question is where the style for the buttons that are used for the dockwidget's titelbar come from and how i can apply the style/icon to my own buttons.

[raven-worx]

@gde23
i don't know if it returns the desired icon, but worth a try:

QIcon icon = widget->style()->standardIcon(QStyle::SP_TitleBarMaxButton, 0, widget);
button->setIcon( icon );

On what platform/desktop are you running on?

Otherwise (if possible) you can set a breakpoint in the Qt source code and step through the code and check where the icon is taken from.

[gde23]

@raven-worx: Thanks a lot. that's exactly what i was looking for