This is undoubtedly a problem with unfamiliarity with Ext, but I am
having a struggle creating an extension to GeoExt to handle ArcGIS legend.
The difference between WMSLegend and AGS legend, is that you get a json
with effective and array of text, url_to_image pairs instead on one
image. I have object that encapsulates that and it is property of an
ArcGISREST92 layer.
The fun is in trying to layout the image and text.
Using wmsLegend as model, I have following:
layerContainer:null;
initComponent: function(){
var me = this;
me.callParent();
var layer = me.layerRecord.getLayer();
me._noMap = !layer.map;
this.legendContainer = Ext.create('Ext.panel.Panel',{
layout: 'vbox',
border: false,
});
this.add(this.legendContainer);
layer.events.register("moveend", me, me.onLayerMoveend);
me.update();
},
The legend Container is supposed to be panel to manage a vertical list
of components.
Forgetting the text for moment, the code to add the images is:
for (j=0, lenj = layerNames.length; j<lenj; j++) {
layerName = layerNames[j];
for(i = 0, len =
layer.agsLegend.layerLegend[layerName].legend.length; i<len; i++) {
if(!this.items || !this.getComponent(layerName+i)) {
if (!layer.hideInLegend) {
var lg =
layer.agsLegend.layerLegend[layerName].legend[i];
this.legendContainer.add({
xtype: "gx_legendimage",
url: layer.agsLegend.serverUrl
+'/'+ layerName +'/images/'+lg.url,
itemId: lg.label
});
}
}
}
}
this.doLayout();
If I examine the DOM, then I can find all the images as entries, but not
displayed. Stuck in a 0,0 div???
If I add the images directly to the agsLegend (this.add({
xtype:"gx_legendimage" etc) instead of this.legendContainer.add, then
the images are all displayed - but in a horizontal row.
I am blowed if I can see what I have missed in layering this out.
Something preventing doLayout from calculating size???
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