[Qgis-developer] Label backgrounds (shape, SVG, drop shadow)

Andreas Neumann a.neumann at carto.net
Sat Mar 30 11:18:39 PDT 2013


Hi,

I'd love to have these label backgrounds and drop shadows in QGIS 2.0.
Makes sense to me to include this work despite feature freeze since a
major effort was made already to improve labeling in QGIS 2.0.

so +1 from my side.

Thank you for your work, Larry.

Andreas

Am 30.03.2013 12:32, schrieb Larry Shaffer:
> Hi,
> 
> In an effort to bring a basic label background feature into 2.0 before for
> the freeze, I figured out a good approach that makes adding label
> backgrounds much easier (better late than never, I suppose) [0]. This means
> that adding SVGs and drop shadows for label backgrounds is only an extra
> couple of days of work.
> 
> Here's a preliminary gui setup [1] (not all may be implemented, but most
> can easily be).
> 
> An example of generic rounded-corner rectangles (a la web mapping and many
> road shields) with a bit of x/y offset to nicely center the text [2].
> 
> And, an example of the 'centering' of the background relative to the label
> contents (background rotated 90 deg relative to text) [3], regardless of
> label's offset placement (see pink-text label next to point feature). This
> is a crucial feature for integrating many types of backgrounds.
> 
> Both examples also show one issue: while labels don't overlap due to
> collision management, their backgrounds might overlap each other or
> previously drawn label text. I believe this is fixable, though I don't know
> how long it will take, off hand.
> 
> So... basically, I'm asking those who make decisions whether I can work for
> another week on this feature, for inclusion in 2.0.
> 
> [0] https://github.com/dakcarto/Quantum-GIS/commits/labeling_bkgrd-symbols_3
> [1] http://drive.dakotacarto.com/qgis/labeling_background-gui.png
> [2] http://drive.dakotacarto.com/qgis/labeling_background-rounded.png
> [3] http://drive.dakotacarto.com/qgis/labeling_background-rotation.png
> 
> Regards,
> 
> Larry Shaffer
> Dakota Cartography
> Black Hills, South Dakota
> 
> 
> 
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