Hi, now I've tried this:
Qt Code: 
  1. //constructor of myidget:
  2. myPopupmenu->insertItem("WireFrame", this, SLOT(setWireframe(true)), 4);
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The Errors are these:
Qt Code: 
  1. QObject::connect: No such slot MyWidget::setWireframe(true)
  2. QObject::connect:  (sender name:   'unnamed')
  3. QObject::connect:  (receiver name: 'myWidget1')
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I don't understand: setWireframe(bool) there is and it's a slot; sender name unamed!?
Any hints?