One QGLWidget that manage QGLWidget childs
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Hi devs.
I would like to know if the following use case is supported by QT.
I have one "TopLevel" QGLWidget :
@class ParentGLWidget : public QGLWidget {
...
ParentGLWidget(QGLContext * context, QWidget *parent = 0) : QGLWidget(context, parent) {... }
...
void initializeGL()
{
qglClearColor(qtPurple.dark());
glEnable(GL_CULL_FACE);
...
}void paintGL() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); } void resizeGL(int width, int height) { glViewport((width - side) / 2, (height - side) / 2, side, side); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrthof(-0.5, +0.5, -0.5, +0.5, 4.0, 15.0); glMatrixMode(GL_MODELVIEW); }
}@
There are other "GLWidget" that should be drawn inside the top level widget context :
@class ChildGLWidget : public QGLWidget {
...
ChildGLWidget(QGLContext * context, QWidget *parent = 0) : QGLWidget(context, parent) {... }
...
void initializeGL()
{
// optional
// at least, should not overwrite what have been done in the top level widget
}void paintGL() { glLoadIdentity(); glTranslatef(0.0, 0.0, -10.0); glRotatef(xRot, 1.0, 0.0, 0.0); // draw some object in the gl world } void resizeGL(int width, int height) { // optional // at least, should not overwrite what have been done in the top level widget }
}@
I would like to use them like this :
@
QGLContext * context = new QGLContext(QGLFormat(QGL::SampleBuffers));
ParentGLWidget * parent = new ParentGLWidget(context);
ChildGLWidget * child_1 = new ChildGLWidget(context, parent);
ChildGLWidget * child_2 = new ChildGLWidget(context, parent);
@The childs could be managed (drawing, deletion, ...) by the parent (like traditional widgets do).
II haven't been able to run such a use case.
Is there any design flaw in this use case ?
Thank for your help.
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If you comment out the childs creation, does the ParentGLWidget show up correctly (so without childs)?
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Yes.
My test code works if display independently each widget in different contexts.