<script><![CDATA[
    zk.afterLoad("zul.inp", function () {
        var _xComboWidget = {};
        zk.override(zul.inp.ComboWidget.prototype, _xComboWidget, {
            bind_: function () {
                this.$supers(zul.inp.ComboWidget, 'bind_', arguments);
                var btn, inp = this.getInputNode();
    
                if (btn = this.$n('btn')) {
                    this.domListen_(btn, zk.android ? 'onTouchstart' : 'onClick', '_doBtnClick');
                    if (this._inplace) this.domListen_(btn, 'onMouseDown', '_doBtnMouseDown');
                }
    
                zWatch.listen({onSize: this, onFloatUp: this, onResponse: this, onScroll: this});
                if (!zk.css3) jq.onzsync(this);
            },
            unbind_: function () {
                this.close();
    
                var btn = this.$n('btn');
                if (btn) {
                    this.domUnlisten_(btn, zk.android ? 'onTouchstart' : 'onClick', '_doBtnClick');
                    if (this._inplace) this.domUnlisten_(btn, 'onMouseDown', '_doBtnMouseDown');
                }
    
                zWatch.unlisten({onSize: this, onFloatUp: this, onResponse: this, onScroll: this});
                if (!zk.css3) jq.unzsync(this);
    
                this.$supers(zul.inp.ComboWidget, 'unbind_', arguments);
            },
            _doKeyDown: function (evt) {
                var keyCode = evt.keyCode,
                    bOpen = this._open;
                    // Bug ZK-475, ZK-3635
                if (evt.target == this && (keyCode == 9 || (zk.webkit && keyCode == 0))) { //TAB or SHIFT-TAB (safari)
                    if (bOpen)
                        this.close({sendOnOpen: true});
                    return;
                }                if (evt.altKey && (keyCode == 38 || keyCode == 40)) {//UP/DN
                    if (bOpen) this.close({sendOnOpen: true});
                    else this.open({sendOnOpen: true});                    //FF: if we eat UP/DN, Alt+UP degenerate to Alt (select menubar)
                    var opts = {propagation: true};
                    if (zk.ie < 11) opts.dom = true;
                    evt.stop(opts);
                    return;
                }                //Request 1537962: better responsive
                if (bOpen && (keyCode == 13 || keyCode == 27)) { //ENTER or ESC
                    if (keyCode == 13) this.enterPressed_(evt);
                    else this.escPressed_(evt);
                    return;
                }                if (keyCode == 18 || keyCode == 27 || keyCode == 13
                || (keyCode >= 112 && keyCode <= 123)) //ALT, ESC, Enter, Fn
                    return; //ignore it (doc will handle it)                if (this._autodrop && !bOpen)
                    this.open({sendOnOpen: true});                if (keyCode == 38) this.upPressed_(evt);
                else if (keyCode == 40) this.dnPressed_(evt);
                else this.otherPressed_(evt);
            }
         });
    });
]]></script>