[Qgis-developer] color ramp manager

[Etienne Tourigny]

On Tue, Aug 7, 2012 at 2:56 PM, jjg <j.j.green at gmx.fr> wrote:
>
> Etienne Tourigny-3 wrote
>>
>> I was thinking of an interface to make zip files from selection lists.
>> The plugin would probably be suited for that, because it's not really
>> part of the core and it's much easier to write this sort of thing in
>> python. Ideally, we should have a point-n-click interface for
>> generating these selections, but I think it would be too costly to
>> implement. So a manual solution would probably be easiest on the
>> short-term. Unless we feel it's necessary to have users make their own
>> selections (by selecting favourites), and use that.
>>
>> Perhaps a first step would be using the cpt-city selections which can
>> be distributed and generate a list from that.
>>
>
> I dont think you need to make a selection "topo and free", just make
> a selection "topo", and apply it to to the set of free files, ignoring those
> not present.  This is quite generic, it can be used on the GUI, for
> generating zipfiles, whatever.

That's what I meant - identify if the directory can be distributed,
and make a selection which would be filtered by the distribution flag.

So you are suggesting to add tags to each file? I was thinking more
like what you are doing: make a category an add the
gradients/directories which are in that category. But what you are
saying is basically the same.

>
> Selections should select only one thing, then different selections can
> be combined to suit.  "dark" + "spectral" = "dark spectral" ...
>
>
>
>> Do people feel that the existing cpt-city "selection" would be
>> sufficient, or are there too many?
>>
>
> If there are any others that could be useful for QGIS please
> send me a list of file paths ..

I will in due time, thanks

>
>
>
>> 3) testing the rendering of the gradients (I have a solution that
>> compares the preview to the png's on the cpt-city website)
>>
>
> Does the GUI render SVG?  I ask because the cptutils svgx program
> can add a preview to an svg gradient file (so it becomes "self
> documenting"), so saving the bother of a extra png file or whatever.

Actually the gui (inside qgis color ramp selector) parses the svg, and
makes a preview pixmap. This is what qgis does for other gradients
(ColorBrewer, user-defined both for the preview and the actual
rendering).

Thanks for the tip, I'll look into that. Qt can render svg files
(presumably the preview you mention) with QSvgRenderer (part of the
QtSvg Module)


>
> I considered adding these previews to the SVG gradients on the
> cpt-city site, but with 6K files every byte in the file is 6KB on the site
> ...
>
>
>
>
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