Extjs combobox: hide selected value from dropdown list

Question

I\'m using ExtJS 4 and looking for a way I can hide currently selected value from combo\'s dropdown list?

So instead of this (\"Alaska\" currently selected in combobox):

Answer 1

ExtJS 3 I wrote this answer based on the others. Works great for me, its a little modified from what your looking for though.

Name.space.name = new Ext.extend(Ext.form.ComboBox, {
    type: 'all',
    oldrec: null,
    store: null,
    constructor: function (config) {
        var me = this;
        if (config.type === 'all') {
            me.store = AllConditionStore;
        } else {
            me.store = ?.?('RuleParameterType');
        }
        config = Ext.apply({
            store: me.store,
            valueField: 'id',
            hideActive: true,
            triggerAction: 'all',
            lazyRender: true,
            allowBlank: false,
            mode: 'local',
            displayField: 'text',
            listeners: {
                select: function (me, recs, index) {
                    if (me.oldrec !== null)
                        me.store.add(me.oldrec);
                    me.oldrec = recs;
                    // remove the selected from the store
                    me.store.remove(recs);
                    // redo store
                }
            }
        }, config);
        ?.?.Parameter.superclass.constructor.call(this, config);
    }
});