[PyKDE] Deleting items from Canvas
jbublitz at nwinternet.com
Wed Jun 5 17:53:00 BST 2002
On 01-Jan-70 Moray Taylor wrote:
> I have a program that puts items onto a canvas, keeps a reference
> to it, and deletes the reference when I want to remove the item
> from the canvas. What I want to know is...
> A) Is this all I need to do?
> B) If not, what is the reccommended way of removing items from a
> The reason I ask, is that I run PyQT on SGI, Intel, and PowerPC,
> the results from the PowerPC version are very different to the
> Intel/SGI, I cannot get the items to remove themselves from the
> canvas on PPC, the code I use is *exactly* the same.
I'd assume in that case you don't have any stray references to the
Python object hanging around which can cause problems.
> I need to know if it's the PowerPC with the problem or otherwise.
When I've had problems using 'removeChild' on x86, I've used
def removeWidget (self, w) #w is a QWidget/QObject descendant
dummy = QWidget ()
w.reparent (dummy, QPoint (0, 0))
# when dummy goes out of scope, it gets garbage collected
# along with all of it's children (and the corresponding
# C++ objects get destroyed as well)
The way Qt handles the above is different than the way
'removeChild' followed by 'del w' would work.
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