On 11/05/2012, at 8:22, "Alister Hood" <[email protected]> wrote:
> vector operations on a grid. And I guess the digitising tools would be > disabled for these layers. But people do treat grids as features for > geoprocessing,. > >>> interesting approach might be to use QgsPluginLayer class, but IMHO a >>> grid is not even a layer... e.g. does it make any sense to draw some >>> other layers on top of a grid? > > Certainly not usually, at least for printing, although I can imagine using a > grid of alternating filled gray and white squares under the map layers, > rather than grid lines over the map layers. > I can also imagine if someone was working with point and line layers and > unfilled polygon styles they might move these layers above the grid to make > it easier to see them. > Anyway, it would certainly make sense in some cases to have more than one > grid "layer", to be able to symbolise them differently (which implies being > able to control which one of them is above another) and turn them on and off > independently. Creating them as layers would make this simple. > >> I guess it makes more sense to draw the grid on top - are there any >> uses to draw the grid below the layers? In any case, a simple >> (top/bottom) selector would suffice. > > I doubt there are many cases when somebody would want grids below the layers, > but I wouldn't rule it out entirely. > But I do think people would want grids below feature labels and diagrams > (other map decorations are above these), and below map annotations (other map > decorations are below these, although I think that they probably shouldn't > be). +1 I would definitely want it below labels and annotations at least; and I can also easily think of situations where I might want to move it below other layers. -ramon._______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
