问题
I have the following layout:
The black rectangles are QVBoxLayouts, the red one is a generic widget container and the blue little rectangle is my custom openGL widget.
I already set the resize policies for all layouts and widgets, but I can't get the openGL little widget to resize to the extent of his parent's area (the red rectangle in the image).
I'm a Qt beginner, perhaps I need to use signals and slots to resize the little blue openGL widget to the red one? But how?
回答1:
The QGLWidget should also be in a layout (of any layout type) to resize itself automatically when its parent is resized.
So, for instance, in the designer, left-click on the red "generic widget container", and choose a vertical layout.
回答2:
In Qt5.4 (i didn't test others) new QOpenGLWidget (inside layout) do not resized automatically in my case. I call
LayoutWidget->setGeometry(QRect(0, 0, event->size().width(), event->size().height()));
in resizeEvent(QResizeEvent *event) of parent widget.
来源：https://stackoverflow.com/questions/11612146/qt-resize-widget-inside-another-widget