Pictures drawn by QGLWidget are sometimes changed by themselves

Fivestar

I made some class inherited by QGLWidget and inserted them one Qdialog such that

-------------------------
|   ------     -------  |
|   | A  |     |  B  |  |
|   ------     -------  |
-------------------------

Here, A, B are two widgets drawing graph. There are also two buttons A', B' that start drawing in A and B.
After I pushed A', then a graph was drawn in A, if I did some other actions, for examples, clicked other button, view explorer, or run other programs ... then sometimes the picture in A copy to B by itself.
I couldn't understand this phenomena.

? Offline

Hi, and welcome to the Qt forum!

You need to provide more info. Make a minimal example to reproduce this behaviour and show us that code :-)