[Users] efficient way to group overlay layers in tree node
karsten vennemann
Hi All,
Using geoext 1.1, what is the best way to filter (or create) a Tree node with non-baselayers (“overlay”) GIS layers and group them ?
I have this node but am failing to only show non-baselayers . I even manually created a two stores store that holds the list of layers I would like to have in a tree node
var kartendaten_layer = new Array();
kartendaten_layer = [hintergrund,emptylayer,maske,waldbesitzer,waldbesitzer_jahr,waldbesitzer_tile,gemeinde_tile,landkreise_tile,regierungsbezirke_tile,flkgrenzenbayern_tile,annotation];
var schutzgebiete_layer = new Array();
schutzgebiete_layer = [nationalparke,vogelschutzgebiete,naturparke,landschaftsschutzgebiete,biosphaerenreservate,naturschutzgebiete,ffh_gebiete,ramsar_gebiete];
var kartendaten_layerstore = new GeoExt.data.LayerStore({
map: map,
layers: kartendaten_layer
});
var schutzgebiete_layerstore = new GeoExt.data.LayerStore({
map: map,
layers: schutzgebiete_layer
});
but I still get either the base layers also listed in the node when using gx_layercontainer (see below, and could not cerate a correct filter get rid of base layers see the ??? below)
how could I filter out baselayer e.g. ? Or even use my layer.options.Group ?
or strangely it is not honoring my list of layers and show all overlay layer when using gx_overlaylayercontainer
…
{nodeType: "gx_layercontainer",
text: 'Kartendaten',
layerStore: kartendaten_layerstore, // mapPanel.layers,
expanded: true,
loader: {
filter: function(record) {
???
},
baseAttrs: {
uiProvider: "custom_ui"
},
createNode: function(attr) {
if (GeoExt.WMSLegend.supports(mapPanel.layers.getByLayer(attr.layer))){
attr.component = {
xtype: "gx_wmslegend",
layerRecord: mapPanel.layers.getByLayer(attr.layer),
showTitle: false,
cls: "legend"
};
}
return GeoExt.tree.LayerLoader.prototype.createNode.call(this, attr);
}
}
}, …
Any suggestions how to make this work ?
Cheers
Karsten
Karsten Vennemann
Terra GIS Ltd
2119 Boyer Ave E
Seattle, WA 98112
USA
tel ++ 206 905 1711
fax ++ 925 905 1711
Andreas Hocevar
first of all, you shouldn't be using multiple layer stores, unless
your tree is not meant to be a tree representation of the layers of
your map.
If you only want overlays, you can use a gx_overlaylayercontainer
instead of a gx_layercontainer. Or if you want to use a custom filter,
your filter function would be
filter: function(record) {
return record.getLayer().isBaseLayer === false;
}
Hope this helps,
Andreas.
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karsten vennemann
>>> first of all, you shouldn't be using multiple layer stores, unless
your tree is not meant to be a tree representation of the layers of
your map.
I changed it back to just one layer store. The baselayer filter below works
to get rid of base layers in that node. I did also successfully filter by
layer option when I set a group option on the layer e.g.
return record.get("layer").group == "Schutzgebiete";
(when the layer has under options this set:
group: "Schutzgebiete"
Karsten
>>> If you only want overlays, you can use a gx_overlaylayercontainer
instead of a gx_layercontainer. Or if you want to use a custom filter,
your filter function would be
filter: function(record) {
return record.getLayer().isBaseLayer === false;
}
Hope this helps,
Andreas.
_______________________________________________