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[COMBO BOX/SELECTION/DROPDOWN LIST] CQ5 multiselect combobox

Issue:

Create a multiselect combobox in CQ.

Layout:

Widget file (multiselectlist.js):

if ('function' !== typeof RegExp.escape) {
    RegExp.escape = function(s) {
        if ('string' !== typeof s) {
            return s;
        }
        return s.replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
    };

}

CQ.Ext.form.Multiselect = CQ.Ext.extend(CQ.Ext.form.ComboBox, {

    checkField: 'checked',
    separator: ',',
    multiSelect: true,
    mode: "remote",
    isSelectAll: false,

    constructor: function(config) {

        config = config || {};
        var nameTextField = config.name;
        var that = this;
        config.store = new CQ.Ext.data.Store({
            //autoLoad: true,

            proxy: new CQ.Ext.data.HttpProxy({
                url: config.options,
                method: 'GET'
            }),

            reader: new CQ.Ext.data.JsonReader({

                root: 'root',
                fields: [config.valueField, config.displayField]
            }),
        });

        config.store.on("load", function(store, records, options) {

            var v = document.getElementsByName(nameTextField)[0].value;

            var numberItem = v.split(",").length + 1;

            store.each(function(r) {
                 var checked = false;
                 var id = r.get(config.valueField);
                 var value = r.data.name;

                 if (v.indexOf(id) != -1 || v.indexOf(value) != -1 ) {
                     checked = true;
                 }

                 r.set(that.checkField, checked);

             }, that);

        if(numberItem == records.length){

         $('#' + that.innerList.id + '').find("input:first").attr('checked', 'checked');
         that.isSelectAll = true;

        }
        that.value = that.getCheckedValue();
        that.setRawValue(that.getCheckedDisplay());

        });       

        config.triggerAction = "all";
        CQ.Ext.form.Multiselect.superclass.constructor.call(this, config);

    },

    initComponent: function() {
    if (!this.tpl) {

     this.tpl = '<tpl for=".">' + '<div class="x-combo-list-item">' + '<div class="ux-lovcombo-item-text"><input style="float:left;position: relative;top:2px" id="{' + this.valueField + '}" class="{' + this.valueField + '}" type="checkbox"/>' + '<label style="display:block;padding-left:20px" for="{' + this.valueField + '}">{' + this.displayField + '}</label>' + '</div>' + '</div>' + '</tpl>';

    }   

        CQ.Ext.form.Multiselect.superclass.initComponent.apply(this);     

        this.on({
            scope: this,
            beforequery: this.onBeforeQuery,
            blur: this.onRealBlur
        });

        this.onLoad = this.onLoad.createSequence(function() {

            if (this.el) {
                var v = this.el.dom.value;
                this.el.dom.value = '';
                this.el.dom.value = v;
            }
        });
    },   

    initEvents: function() {
        CQ.Ext.form.Multiselect.superclass.initEvents.apply(this, arguments);
        this.keyNav.tab = false;
    },

    clearValue: function() {

        this.value = '';
        this.setRawValue(this.value);
        this.store.clearFilter();

        this.store.each(function(r) {
        r.set(this.checkField, false);
        }, this);

        if (this.hiddenField) {
            this.hiddenField.value = '';
        }
        this.applyEmptyText();
    },

    getCheckedDisplay: function() {
        var re = new RegExp(this.separator, "g");
        return this.getCheckedValue(this.displayField).replace(re, this.separator + ' ');

    },

    getCheckedValue: function(field) {
        field = field || this.valueField;
        var c = [];
        var value = "";
        var snapshot = this.store.snapshot || this.store.data;

        snapshot.each(function(r) {
        var id = r.data.id;
        if(id != "selectAll"){
         value = r.get(field);
         divItem = $('#' + id + '');

         if (r.get(this.checkField)) {
          c.push(value);
          divItem.attr('checked', 'checked');
         } else {
          divItem.removeAttr('checked');
         }
        }
        }, this);

        return c.join(this.separator);
    },

    onBeforeQuery: function(qe) {
        qe.query = qe.query.replace(new RegExp(RegExp.escape(this.getCheckedDisplay()) + '[ ' + this.separator + ']*'), '');

    },

    onRealBlur: function() {
        this.list.hide();
        var rv = this.getRawValue();
        var rva = rv.split(new RegExp(RegExp.escape(this.separator) + ' *'));
        var va = [];
        var snapshot = this.store.snapshot || this.store.data;
        CQ.Ext.each(rva, function(v) {
            snapshot.each(function(r) {
                if (v === r.get(this.displayField)) {
                    va.push(r.get(this.valueField));
                }
            }, this);
        }, this);
        this.setValue(va.join(this.separator));
        this.store.clearFilter();
    },

    /**
     * Handle when click select item
     * @param {Mixed}
     *   record : record contains item
     *   index : position item
     */
    onSelect: function(record, index) {
        if (this.fireEvent('beforeselect', this, record, index) !== false) {
          record.set(this.checkField, !record.get(this.checkField));
            if (record.data.id == "selectAll") {
                if (!this.isSelectAll) {
                   this.selectAll();
                    $('#' + this.innerList.id + '').find("input:first").attr('checked', 'checked');
                    this.isSelectAll = true;
                } else {
                    this.deselectAll();
                    $('#' + this.innerList.id + '').find("input:first").removeAttr('checked');
                    this.isSelectAll = false;
                }
            } else {
            if (this.store.isFiltered()) {
            this.doQuery(this.allQuery);
            }
            this.setValue(this.getCheckedValue());
            this.fireEvent('select', this, record, index);
            }
        }
    },

    /**
     * Sets the value for textfield when load or click select item
     * @param {Mixed}
     *   v:value
     */
    setValue: function(v) {
        if (v) {
            v = '' + v;
            if (this.store.data.length != 0) {
                // this.store.clearFilter();
                this.store.each(function(r) {
                    var checked = false;
                    var id = r.get(this.valueField);
                    var value = r.data.name;

                    if (v.indexOf(id) != -1 || v.indexOf(value) != -1 ) {
                        checked = true;
                    }
                    r.set(this.checkField, checked);
                }, this);

                this.value = this.getCheckedValue();
                this.setRawValue(this.getCheckedDisplay());
                if (this.hiddenField) {
                    this.hiddenField.value = this.value;
                }
            } else {
                this.value = v;
                this.setRawValue(v);
                if (this.hiddenField) {
                    this.hiddenField.value = v;
                }
            }
            if (this.el) {
                this.el.removeClass(this.emptyClass);
            }
        } else {
            this.clearValue();
        }
    },   

    /**
     * Selects all items
     */
    selectAll: function() {
        this.store.each(function(record) {
            if (record.data.id != "") {
                record.set(this.checkField, true);
            }
        }, this);

        // display full list
        this.doQuery(this.allQuery);
        this.setValue(this.getCheckedValue());
    },

    /**

     * Deselects all items.

     */
    deselectAll: function() {
        this.clearValue();
    }
});
CQ.Ext.reg('multiselect', CQ.Ext.form.Multiselect);

Config:
<changeLink
      jcr:primaryType="cq:Widget"
      displayField="name"
      fieldLabel="Change Country Link"
      name="./changeLink"
      options="$PATH.seasonlist.json"
      valueField="id"
      xtype="multiselect"/>
Note: displayField, valueField, options are mandatory fields.
options: is the url that is used to call to servlet to get data map for combobox.
displayField: is the name of field to display which is returned from servlet.
valueField: is the name of value field which is returned from servlet.

Servlet:
@SlingServlet(
    selectors = {"seasonlist"},
    methods = {"GET"},
    extensions = {"json"},
    resourceTypes = {"sling/servlet/default"}
)

@Properties({
    @Property(name="service.pid", value="com.test.servlet.SeasonListServlet",propertyPrivate=false),
    @Property(name="service.description",value="Servlet to retrieve a season list", propertyPrivate=false),
    @Property(name="service.vendor",value="Test", propertyPrivate=false)
})
public class SeasonListServlet extends SlingAllMethodsServlet {

 private static final long serialVersionUID = 1L; private static final Logger logger = LoggerFactory.getLogger(SeasonListServlet.class);
@Override
 protected void doGet(SlingHttpServletRequest request, SlingHttpServletResponse response) throws ServletException {

  response.setContentType("text/json; charset=UTF-8");
  Map<String, String> seasonList = new HashMap<String, String>();
         getJsonSeasonList(seasonList);
}

 private JSONObject getJsonSeasonList(HashMap<String, String> seasonList) throws JSONException  {

  JSONObject jsonObj = new JSONObject();  
                  JSONArray seasonArray = new JSONArray();  
                  JSONObject jsonProd = null;

  for(String season : seasonList) {
      jsonProd = new JSONObject();
                       jsonProd.put("id", season.id);   
                       jsonProd.put("name", season.name);   
                       seasonArray.put(jsonProd);  
                  }
  jsonObj.put("root", seasonArray);  
                  return jsonObj;
       }
}

Note: to add "Select All" option into combobox list, please set it in the list which is returned from servlet. The value is:

jsonProd.put("id", "selectAll");   
jsonProd.put("name", "Select All);

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