[Qgis-developer] scale dependent visibility and fixed scales

[kimaidou]

Hi,

Larry, you are right, I just tested Qgis 1.8 with one of my projects, and
indeed now Qgis displays the layer between the two bounds *included*.
I missed that !

Thanks to the dev who corrected the old behaviour.

Michael

2012/8/17 Larry Shaffer <larrys at dakotacarto.com>

> On Thu, Aug 16, 2012 at 5:33 PM, Larry Shaffer <larrys at dakotacarto.com>
> wrote:
> > Hi,
> >
> > On Thu, Aug 16, 2012 at 7:40 AM, kimaidou <kimaidou at gmail.com> wrote:
> >> Hi all
> >>
> >> I totally agree scale limits should be included. I usually need to set
> 51000
> >> or 49999 so that exact 50k is taken into account for respective max /
> min
> >> scales.
> >> Including the bounds will be more logic in my opinion.
> >
> > I concur. Do you mean like this:
> >
> >
> http://dl.dropbox.com/u/4058089/qgis/scale-boundaries-included_patch.diff
> >
> > Those were the first two I could find, there are probably others.
>
> On second look, QgsRuleBasedRendererV2::Rule::isScaleOK looks like
> it's already including the boundaries. (removed it from the diff)
>
> > I believe this is how the PAL labeling engine [0] already handles
> > this, and it's how my recent data defined scale-visibility for labels
> > works [1].
> >
> > [0]
> https://github.com/qgis/Quantum-GIS/blob/master/src/core/pal/layer.cpp#L132
> > [1]
> https://github.com/qgis/Quantum-GIS/blob/master/src/core/qgspallabeling.cpp#L516
> >
> > Regards,
> >
> > Larry
> >
> >> Cheers
> >> Michael
> >>
> >> 2012/8/16 Marco Bernasocchi <marco at bernawebdesign.ch>
> >>>
> >>> Hi all, today I was plaing around with some swiss maps (LK25 and LK50)
> I
> >>> wanted to have LK50 (national map 1:50000) visible only from scale
> >>> 1:50000 and if it is zoomed in then I want to see LK25.
> >>>
> >>> So I set the maps to be scale dependent visible as here:
> >>> LK25 min:0 Max 50000
> >>> LK50 min: 50000 Max 1000000000
> >>>
> >>> the concept works but there is a detail (matter of changing a < to <=
> or
> >>> so) that I think it is not super intuitive.
> >>> If I select the fixed scale of 1:50000 then onlx LK25 is shown. I would
> >>> expect either both or only LK50 to be visible.
> >>> what do think?
> >>>
> >>> ciao
> >>> --
> >>> Marco Bernasocchi
> >>> http://opengis.ch
> >>> _______________________________________________
> >>> Qgis-developer mailing list
> >>> Qgis-developer at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/qgis-developer
> >>
> >>
> >>
> >> _______________________________________________
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> >>
>
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