[Qgis-developer] How to get renderComplete painter reference

[Martin Dobias]

Hi Jürgen

On Mon, Apr 7, 2014 at 11:42 AM, Jürgen E. <jef at norbit.de> wrote:
> Hi Nathan,
>
> On Mon, 07. Apr 2014 at 19:37:35 +1000, Nathan Woodrow wrote:
>> Both those signals are the same and work the same. The newer .connect method
>> is the better way.
>
> Maybe that was to rule out something else.

Yeah, anyway I checked again and even original Anita's statement
worked for me. This is what I did in python console:

from PyQt4.QtCore import *
class A(QObject):
  def __init__(self): QObject.__init__(self)
  def f(self, painter): import sys; sys.__stdout__.write("hello\n")
a = A()
iface.mapCanvas().renderComplete.connect(a.f)

when moving the map, it will output "hello" to the system console from
where I started QGIS... so problem is probably somewhere else, not
with connection itself.


> Apropos does either connect actually return True?

I have learned not to trust the return value of connect() at all, for example:

>>> QObject.connect(iface.mapCanvas(), SIGNAL("abracadabra()"), a.f)
True

I'm pretty sure map canvas cannot do this kind of magic!

Cheers
Martin