Hi Larry
+1 for pushing the drop shadows to master.
>Does switching over the data defined backend for labeling constitute a
new feature? If not, I'd like to work on it over the next week.
Tim as release manager needs to decide here.
>* Significantly missing functionality currently occurs in the data
defined aspect of new labeling features. Many of the new features do not
have corresponding data defined options, and the current gui >and usage
of the data defined values does not mirror that of the new setup by
recently committed by Dr. Marco H for symbology. Since labeling does not
yet have a rule-based setup, it would be *very >good* to have the
current data defined setup for labeling switched over to Marco's method.
This will allow expressions to be used for all labeling options and give
users a solid feature set for labeling >to work with until 2.1.
Something related is to have classified label styles. Often it is
necessary to apply multiple label styles in one layer depending on
attribute expressions (kind of rule based renderer for labels). Maybe in
2.1...
Regards,
Marco
On 09.04.2013 04:52, Larry Shaffer wrote:
Hi,
Here's an update on the labeling work I've been doing for the past week:
* Label backgrounds (geometric shapes and SVG) have been
implemented/committed, but currently have a couple of loose ends [0].
* Label drop shadows are essentially functional, and work for label
buffers [1]. I need a couple of days to clean up the overly verbose
code, simplify the logic and make it work for label text and
backgrounds. In the GUI and map canvas screen snaps [2][3] you can see
an example of the radius blurring and of the 'global' offset option
(there are also debug rectangles shown). When global is checked for
shadow offset, rotated label's drop shadows are adjusted to match the
global offset for the layer (instead of being relative to the label's
rotation). For example, this allows all drop shadows on all labels, or
their buffers/backgrounds, to match what a user may have setup in a
hill shaded raster, i.e. opposite the angle of a virtual sun. Turning
on all these features does slow labeling down, of course. :^)
* Significantly missing functionality currently occurs in the data
defined aspect of new labeling features. Many of the new features do
not have corresponding data defined options, and the current gui and
usage of the data defined values does not mirror that of the new setup
by recently committed by Dr. Marco H for symbology. Since labeling
does not yet have a rule-based setup, it would be *very good* to have
the current data defined setup for labeling switched over to Marco's
method. This will allow expressions to be used for all labeling
options and give users a solid feature set for labeling to work with
until 2.1.
So, I have a couple questions:
Can I push the cleaned up and functional labeling drop shadows work to
master branch in a couple of days, for inclusion in 2.0? It was my
understanding this was part of the labeling background work I was
temporarily allowed to do, but it has taken a couple of days longer
than expected.
Does switching over the data defined backend for labeling constitute a
new feature? If not, I'd like to work on it over the next week.
If switching over the data defined backend is considered a new
feature, and not allowed to be committed right now, can I at least
work on adding some of the missing data defined options for labeling?
[0] https://github.com/qgis/Quantum-GIS/commit/b8097239
[1] https://github.com/dakcarto/Quantum-GIS/commits/labeling_dropshadow_4
[2] http://drive.dakotacarto.com/qgis/labeling_drop-shadow-options.png
[3] http://drive.dakotacarto.com/qgis/labeling_drop-shadows.png
Regards,
Larry
On Sat, Mar 30, 2013 at 12:18 PM, Andreas Neumann <[email protected]
<mailto:[email protected]>> wrote:
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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Sourcepole - Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
[email protected] http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee
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