[OpenLayers-Users] map related concepts in openlayer

[maven apache]

Thanks,I will have a try. :)

2011/12/17 Andreas Hocevar <ahocevar at opengeo.org>

> I understood your question. Again, the answer is that the only concept
> of a layer collection in OpenLayers at the library level is the base
> layer / overlay dichtomy. If you want a layer switcher with radio
> buttons to turn entire layer collections on and off, you will have to
> create your custom layer switcher. If you use WMS layers, and all your
> layers come from the same WMS, you can treat an OpenLayers.Layer.WMS
> instance as a collection by providing a list of layers to the layers
> param (e.g. layers: ["layer1", "layer2"], but the layer switcher will
> not know about "layer1" and "layer2".
>
> You can also have a look at http://geoext.org/, which provides layer
> tree components that allow you to build what you want. Or you can try
> a quick and dirty approach (note the "don't try this at home" comment)
> like this: http://ol-performance.appspot.com/group3.html
>
> Andreas.
>
> On Sat, Dec 17, 2011 at 10:21 AM, maven apache <apachemaven0 at gmail.com>
> wrote:
> > Hi, Andreas Hocevar:
> >
> > Thanks for your attention,however you may misunderstand me .
> >
> > I want the layerswitcher change the layer in this manner:
> >
> > http://i.stack.imgur.com/PNRHC.png
> >
> > Thanks.
> >
> > 在 2011年12月17日 下午4:08，Andreas Hocevar <ahocevar at opengeo.org>写道：
> >
> >> Ok, you're looking for the isBaseLayer option. It can be set as
> >> configuration option on a layer, and will cause the layer to become
> part of
> >> the baseLayer collection. And this is the only layer collection on the
> >> library level. Members of this collection are mutually exclusive, so
> only
> >> one can be visible at a time.
> >>
> >> Andreas.
> >>
> >> On Dec 17, 2011 7:42 AM, "maven apache" <apachemaven0 at gmail.com> wrote:
> >>>
> >>> In fact,I mean if there is any concert like the layercollection which
> may
> >>> contains more than one layer. And the layerswitcher see the
> layercollection
> >>> as radio button and layer as check box.
> >>>
> >>> 在 2011-12-15 晚上9:35，"Andreas Hocevar" <ahocevar at opengeo.org>写道：
> >>>>
> >>>> Maybe you're looking for something else than OpenLayers? OpenLayers
> >>>> does not have the concept of a maptype.
> >>>>
> >>>> Andreas.
> >>>>
> >>>> On Thu, Dec 15, 2011 at 2:21 PM, maven apache <apachemaven0 at gmail.com
> >
> >>>> wrote:
> >>>> > It seems that,there is no maptype related.
> >>>> >
> >>>> > 2011/12/15 Andreas Hocevar <ahocevar at opengeo.org>
> >>>> >>
> >>>> >> Maybe you find UML diagrams helpful:
> >>>> >> http://trac.osgeo.org/openlayers/wiki/UML
> >>>> >>
> >>>> >> Andreas.
> >>>> >>
> >>>> >> On Thu, Dec 15, 2011 at 12:34 PM, maven apache
> >>>> >> <apachemaven0 at gmail.com>
> >>>> >> wrote:
> >>>> >> > Hi:
> >>>> >> >
> >>>> >> > I want to know if there is any document about the concepts and
> >>>> >> > relationship
> >>>> >> > between the map/maptype/layers/overlay ?
> >>>> >> >
> >>>> >> > I thinks sometime it is necessary if we want to do some
> >>>> >> > customzation.
> >>>> >> >
> >>>> >> > I have read the doc from ol.org,but the api document is simple.
> >>>> >> >
> >>>> >> > Any complete documents?
> >>>> >> >
> >>>> >> > Thanks.
> >>>> >> >
> >>>> >> > _______________________________________________
> >>>> >> > Users mailing list
> >>>> >> > Users at lists.osgeo.org
> >>>> >> > http://lists.osgeo.org/mailman/listinfo/openlayers-users
> >>>> >> >
> >>>> >>
> >>>> >>
> >>>> >>
> >>>> >> --
> >>>> >> Andreas Hocevar
> >>>> >> OpenGeo - http://opengeo.org/
> >>>> >> Expert service straight from the developers.
> >>>> >
> >>>> >
> >>>>
> >>>>
> >>>>
> >>>> --
> >>>> Andreas Hocevar
> >>>> OpenGeo - http://opengeo.org/
> >>>> Expert service straight from the developers.
> >>>
> >>>
> >>> _______________________________________________
> >>> Users mailing list
> >>> Users at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/openlayers-users
> >>>
> >
> >
> > _______________________________________________
> > Users mailing list
> > Users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/openlayers-users
> >
>
>
>
> --
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
>
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