Hi,
if you don't want to create your own class a quick and dirty way is to
"monkey patch" the addItem() method and insert your own code there.
Something along the lines:
oldAddItem = the_viewbox.addItem
def myAddFunc(*args, **kwargs):
# do something before the item is added
oldAddItem(*args, **kwargs)
# do something after the item is added
# or yourSignal.emit()
the_viewbox.addItem = myAddFunc
I haven't tested the code, so this might need tweaking.
Cheers,
Sebastian
Am Mittwoch, 29. November 2017 09:16:23 UTC+1 schrieb Carlos Pascual:
>
> Hi,
>
> I've been looking for a way of getting a signal when a new item is added
> to a PlotWidget or ViewBox
>
> Ideally something in the style of "ViewBox.sigItemAdded"
>
> I understand that I could derive ViewBox and/or PlotWidget and reimplement
> the addItem() method to emit such a signal, but this is really something I
> would like to avoid because I would need my code to work with the
> "unmodified" PyQtgraph objects.
>
> So I am wondering if this is already possible in some other way (or if it
> would be a wanted feature, in which case I would be happy to submit a Pull
> Request with an implementation)
>
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