ParameterLayerContainer.js

/**
* @require OpenLayers/Layer.js
*/
(function () {

    /**
    An extended overlay container node, which automatically turns child layers on and off
    */

    Ext.define('GeoExt.tree.ParameterLayerContainer', {
        extend: 'GeoExt.tree.OverlayLayerContainer',
        alias: 'plugin.parameterlayercontainer',

        createParameterLayer: function (layerTitle, expanded) {

            if (expanded === undefined) {
                expanded = false;
            }

            var layerStore = this.mapPanel.layers;
            var idx = layerStore.findExact("text", layerTitle);

            if (idx === -1) {
                console.warn("Layer with title " + layerTitle + " not found");
                return;
            }

            var rec = layerStore.getAt(idx);

            var layer = rec.getLayer();

            var iconCls = rec.get("iconCls");
            var parameters = rec.get("parameters").reverse();
            var aliases = rec.get("parameterAliases").reverse();
            var parameterName = rec.get("parameterName");

            var params = {};
            params[parameterName] = parameters;
            layer.mergeNewParams(params);

            var node = {
                nodeType: "gx_layer",
                expanded: false,
                layer: layer,
                loader: {
                    //delimiter: ",",
                    param: parameterName,
                    baseAttrs: {
                        iconCls: iconCls
                    },
                    createNode: function (attr) {
                        var idx = attr.allItems.indexOf(attr.item);
                        attr.text = aliases[idx];

                        // create the node as normal, but modify the text properties
                        var node = GeoExt.tree.LayerParamLoader.prototype.createNode.call(this, attr);
                        //node.text = node.text;
                        return node;
                    }
                }
            };

            node.text = rec.get("text");
            return node;
        },
        constructor: function (config) {

            this.callParent([config]);

            // TODO layernode no longer has events since update to GeoExt2
            // http://geoext.github.io/geoext2/docs/source/LayerNode.html#GeoExt-tree-LayerNode

            //this.on({
            //    "checkchange": this.enableNodes,
            //    scope: this
            //});
        }
    });


})();