Thanks,I will have a try. :) 2011/12/17 Andreas Hocevar <[email protected]>
> 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 <[email protected]> > 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 <[email protected]>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" <[email protected]> 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" <[email protected]>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 <[email protected] > > > >>>> wrote: > >>>> > It seems that,there is no maptype related. > >>>> > > >>>> > 2011/12/15 Andreas Hocevar <[email protected]> > >>>> >> > >>>> >> 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 > >>>> >> <[email protected]> > >>>> >> 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 > >>>> >> > [email protected] > >>>> >> > 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 > >>> [email protected] > >>> http://lists.osgeo.org/mailman/listinfo/openlayers-users > >>> > > > > > > _______________________________________________ > > Users mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/openlayers-users > > > > > > -- > Andreas Hocevar > OpenGeo - http://opengeo.org/ > Expert service straight from the developers. >
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