[Uml-devel] Small diff: explicit delete QCanvas in destructor of UMLView

[Achim Spangler]

Hi,
I forgot a small patch, I created locally during my X11 memory problem 
tracking.

The documentation of Qt states for QCanvasView::~QCanvasView ()
---------
Destroys the canvas view. The associated canvas is not deleted. 
---------

==> thus we should delete the QCanvas of a UMLView instance during its 
destructor.

This is implemented by the attached small patch.

This solves no crash - but probably one of the existing memory holes. At least 
it's better to do jobs which are suggested by the doc ... ;-)

Bye,
Achim
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