Hi Hugo On Mon, Feb 9, 2015 at 9:37 PM, Hugo Mercier <[email protected]> wrote:
> Hi all, > > We have a request to refine the way layers can be cached and especially > regarding the handling of labels. > > The goal is to be able to optimize what is redrawn during the rendering > when features of only some of the vector layers are moving (a script > somewhere makes them move), and the other vector layers stay the same > (same data, same extent) > Sounds good. Do I understand correctly you want to avoid having to register features on every map rendering? What exactly would be cached - features / label candidates? for one view / for the whole map? I would like to allow labels to be manipulated in a new kind of > "labeling" layers, which could be organised as any other layer in the > legend : on top / above other layers, with blending modes, etc. > Recently there was a ticket filed for that: http://hub.qgis.org/issues/12131 By reordering do you mean that the labeling could get "under" some other layers - i.e. wouldn't be drawn always on top? Or do you mean that a "labeling" layer would actually _draw_ extra labeling instead of _providing_ features? This could be indeed an interesting piece of functionality. Cheers Martin
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