按钮 hover 在 QT 中具有垂直布局的选项卡小部件中不起作用 [英]Button hover is not working in Tab widget with vertical layout in QT
如何在 Qt 中向小部件添加一个圆圈而无需不必要地重新绘制所有内容? [英]How to add a circle to a widget in Qt without needlessly repainting everything?