Patch for thumbnail update in layerbox

[Boudewijn Rempt]

On Sunday 19 September 2010, Dmitry Kazakov wrote:
> >
> > The the KisNodeGraphListener is extended by a method to notify about node
> > changes. Nodes call it when the systemLocked is turned off. I used
> > systemLocked as it only called once an operation is finished, so we don't do
> > updates that are not needed.
> > The node model manages a queue for the nodes that will be updated after a
> > one second timeout.
> >
> > Any comments?
> >
> 
> I have two comments about this:
> 1) I don't think it is very good to use systemLocked call for this. I'm not
> sure this ability (to lock the system) should live in future releases. It's
> not good idea to block UI for any reason. So i temped to deprecate it in the
> future.

Well, systemLocked only locks the gui for a particular layer, so it's pretty safe. I don' think we'll lose that. But I still think that using KisImage::void sigImageUpdated should be enough to kick off the thumbnails timer.

-- 
Boudewijn Rempt | http://www.valdyas.org
Ceterum censeo lapsum particulorum probae delendum esse