hi,
i have a widget called gBAttribute on a MainWindow called configWindow and i want to change it's layout to a VBoxLayout which is returned by the function aart::getEigenschaftenEdit(this) First i had not read the f** manual and tried to do that without deleting the current layout:
Qt Code: 
  1. this->gBAttribute->setLayout(aart.getEigenschaftenEdit(this));
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this gave me the following error:
Qt Code: 
  1. Attempting to add QLayout "" to ConfigWindow "ConfigWindow", which already has a layout.
  2. QWidget::setLayout() : Attempting to add QLayout "" to QGroupBox "gBAttribute", which already has a layout
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so i added some code to delete the current layout before:
Qt Code: 
  1. QLayout * ql = this->gBAttribute->layout();
  2.     if (ql) {
  3.         delete ql;
  4.     }
  5.     this->gBAttribute->setLayout(aart.getEigenschaftenEdit(this));
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now console only tells me
Qt Code: 
  1. Attempting to add QLayout "" to ConfigWindow "ConfigWindow", which already has a layout
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does deleting the layout of one widget mean i have to redo all layouts of the parents ???