c++ - 停靠时不应用 QDockWidget::background-color

Question

我有一个QDockWidget:

我想通过设置标题栏的背景色来提醒用户某些事件。

我通过为我的 DockWidget 设置样式表实现了这一点:

void DockWidget::setCriticalAlert()
{
    setStyleSheet("QDockWidget { background-color:red; }");
}

结果是这样的:

问题是当 QDockWidget 停靠时 background-color 没有应用:

当 QDockWidget 停靠时，如何应用背景色？

Answer 1

这是 Qt 中的一个错误。

Issue 10537

引用链接问题:

The problem is that in QDockWidget::paintEvent, there is a isFloating() condition before drawing PE_FrameDockWidget. We cannot jsut remove this condition as it would break the other style (that does not whish to draw frame when the dockwidget is docked) We cannot either use PE_Widget to draw the frame as then it goes over the dockwidget's title The solution is maybe to introduce a new PE_FrameDockWidgetDocked primitive element. Or some SH_DockWidget_DrawDockedFrame stylehint to draw the frame in every cases.