Thanks for your answer.

Actually, I wonder if my refresh problem is not only on QGIS 2.2. I believe I had not reproduce this behaviour on QGIS 2.4 and 2.6. And I didn't know about the bug.
I have these two points to analyse.

The multithread rendering was available in QGIS 2.2 ??

I'm going to work on the two previous points.

Thanks again,
Alexia


On 24/11/2014 23:52, Luigi Pirelli wrote:
could be related with this?

https://hub.qgis.org/issues/9799

check OTF reprojection combination

regards, Luigi Pirelli

On 24 November 2014 at 23:49, Luigi Pirelli <[email protected]> wrote:
may you also test with the last 2.6version?

regards, Luigi Pirelli

On 24 November 2014 at 01:16, Alexia Mondot <[email protected]> wrote:
Hi all,

I have a plugin using a customized version of Dockable Mirror Map.
I use it to display each processing result in a new view.

I get a strange behaviour with my plugin :
Some times, the canvas stays white. A scroll in it is fine to reload it and
my image is displayed.
I get this problem since the beginning of the development on QIGS 2.2. It is
for me a "random" problem, because I can't say why I get these white canvas.
But, when I get it I save the projet with the white view, and when reloaded,
the canvas is still white.

I've played with canvas.refresh(), canvas renderer flags and even with
canvas.freeze().
I can't understand the behaviour I get, maybe I have a wrong usage of the
properties above.
I also thought about triggerRepaint()...

Thanks by advance,
Alexia


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