c++ - How to change QGLFormat for an existing QGLWidget at runtime? -

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in application, user may change properties of opengl format (i.e. double buffering, multisampling, depth of various buffers, ...).

for now, there 1 qglwidget in application, , if user changes anything, destroy , recreate widget.

now, have more 1 widget. if format change, need destroy/recreate widgets. widget can assume various configurations, destroying/recreating them difficult. there way change format of qglwidget @ runtime?

alternatively, there way replace widget one? (i.e. destroy widget , place new 1 use stand)

this may work:

qglformat newformat; newformat.setdoublebuffer(true); // ... theglwidget->context().setformat(newformat);

edit: can call qglwidget::setformat directly, it's obsolete , may not work. think it's safer recreate widget. here's how: put gl widget in sublayout (any kind - e.g. qvboxlayout) contains nothing gl widget. when want replace new gl widget, delete old one, , insert new widget in sublayout.


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