Custom Styling
KDDockWidgets allows you to derive from several internal widgets (now called views, more QWidget agnostic term) and provide your own
paintEvent and sizings (or .qml files for QtQuick).
You can derive any of these components:
MainWindowDockWidgetFloatingWindow, the window containing one or more dock widgetsTitleBarGroup, a group of tabbed dock widgets with a titlebarTabBar, similar concept to QTabBarStack, similar concept to QTabWidget.Separator, allows resizing dock widgets inside a layoutRubberBand, indicates the drop location when draggingSideBar, the sidebar when using the "auto hide feature"ClassicDropIndicatorOverlay, the drop indicatorsSegmentedDropIndicatorOverlay, the drop indicators in segmented mode
After deriving one or more of the above, create a custom ViewFactory.h which returns your derived instances.
Then call KDDockWidgets::Config::self().setViewFactory(new MyCustomWidgetFactory());.
See examples/dockwidgets/MyViewFactory.h for QtWidgets, or examples/qtquick/customtitlebar/ for QtQuick.
CSS
Qt StyleSheets are not, and will not, be supported. See the comments in
examples/dockwidgets/MyTitleBar_CSS.h for why. You can however use some minimal
CSS, as shown in that example, just don't report bugs about it.