[PyQt] Signal on Selection in QTreeView
phil at riverbankcomputing.com
Tue Mar 18 13:44:01 GMT 2008
On Tuesday 18 March 2008, Marius Kintel wrote:
> On Mar 18, 2008, at 2:57 AM, Kevin Foss wrote:
> > To show you my difficulties, I've tried to test this whole
> > selection model
> > capability using an example from David Boddie at Trolltech. It can
> > be found
> > here:
> > http://firstname.lastname@example.org/8447872
> > Guess what, even his example doesn't work. When I run his
> > example,
> > nothing is printed when an item is selected.
> I think I can help.
> I spend a lot of time figuring out how this works a month or so back.
> My results can be summed up like this:
> ** Never connect a Qt signal to a global python function **
> If the python wrapper object dies (common for temporary wrapper
> objects), the connection goes down with it.
What makes you say that? The connection has nothing to do with the wrapper
object of the emitter.
> Instead, connect to a
> python instance method. This is handled in a special way in SIP making
> the connection survive the temporary python wrapper object.
> Taking my own advice, the example program you mention can be fixed by
> making the slot an instance method instead:
This should make no difference.
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