QGLWidget doesn't hide

[sebc06]

Hello,

I built an application for omap3530 device, based on (Qt 4.7 then Qt4.8) + Opengles.
I followed this tutorial for SGX + Qt installation.

The application consists in three main widgets: a QGLWidget used to display frames from a webcam, a QTableView used to display some execution events and a vertical QWidget with different QPushButton. One of them is used to switch between QGLWidget and QTableView.

The application is able to switch once from QTableView to QGLWidget but when i get in that view, i can't hide the QGLWidget to display the QTableView. It seems that QGLWidget remains at the top of the screen, catching touch events, and that the main widget doesn't refresh the screen.

I tried different solutions : put the three widget in a QHboxLayout and use hide/show slots, put QTableView and QGLWidget in a QStackedWidget, remove QGLWidget from the layout and set null size to QGLWidget (causes segfault) but none of these solutions works.

Any ideas ?
Thanks