[Qgis-developer] Re: classification of rasters

[Marco Hugentobler]

Hi Tim

I think it already respects the transparendy settings (at least in the simple 
test I made).

I'm going to a conference this week and will continue hacking raster branch 
after that.

Regards,
Marco

Am Sonntag, 11. März 2007 05:39 schrieben Sie:
> Hi Marco
>
> I built your changes  and played around with the stuff in the new tab
> - looks cool! I would say yes we should disable it unless pseudocolour
> is active (since that caveat caught me out already until I came back
> and re-read your email :-)
>
> Will you make it respect the transparency settings that Peter is
> implementing? Nice work!
>
> Regards
>
> Tim
>
> 2007/3/10, Marco Hugentobler <marco.hugentobler at karto.baug.ethz.ch>:
> > Hi Tim,
> >
> > I commited a first attempt for raster classification to the transparency
> > branch. The colormap entries are stored in
> > QgsRasterLayer::mValueClassification and are drawn in
> > QgsRasterLayer::drawSingleBandPseudoColor.
> >
> > There is a new tab 'colormap' in the raster properties dialog now.
> > Custom classification currently only kicks in if pseudo color mode is
> > active. Should the colormap dialog be disabled if this is not the  case?
> >
> > Regards,
> > Marco
> >
> > Am Samstag, 10. März 2007 11:44 schrieb Tim Sutton:
> > > Hi Marco
> > >
> > > Sounds cool! I'm also in favour of a new tab since I dont like lots of
> > > pop up windows ala arcmap.
> > >
> > > Regards
> > >
> > > Tim
> > >
> > > 2007/3/10, Marco Hugentobler <marco.hugentobler at karto.baug.ethz.ch>:
> > > > Hi Tim,
> > > >
> > > > I did some experiments with classifications by evaluating value
> > > > against a set of classes. It slows down rendering a bit, but speed
> > > > seems still acceptable for a first version. I may return and try to
> > > > enhance speed with color tables later.
> > > >
> > > > I'm trying to program a GUI for the classification now. I see two
> > > > possibilities:
> > > >
> > > > A new tab called 'custom color map' in the raster layer properties,
> > > > containing the GUI elements to create a classification.
> > > >
> > > > A button 'custom color map...' under the color map combo box. This
> > > > would pop up the dialog for creating the classification.
> > > >
> > > > I'm more in favour of the first one, as it allows users to immediatly
> > > > try out the symbology by pressing 'apply'. What do you think?
> > > >
> > > >
> > > > Regards,
> > > > Marco
>
> --