uas-platform/frontend/uas-web/app/main/MainMenu.js

Ext.define('uas.main.MainMenu', {
    extend: 'uas.panel.Floating',
    xtype: 'mainmenu',

    initComponent: function() {
        var me = this;
        me.callParent(arguments);
        me.addEvents();
    },

    addEvents: function() {
        var me = this;
        Ext.getDoc().on({
            mousemove: me.onViewMouseMove,
            scope: me
        });
    },

    removeEvents: function() {
        var me = this;
        Ext.getDoc().un('mousemove',  me.onViewMouseMove, me);
    },

    onViewMouseMove: function(e) {
        var me = this, 
            x = e.getX(),
            y = e.getY(),
            hBorder = me.align == 'left' ? (x <= 1) : (x >= Ext.getViewportWidth() - 1),
            vBorder = me.rendered ? (y >= me.getPosition(true)[1]) : (y >= (me.y || 0));
        if (hBorder && vBorder && me.isHidden()) {
            me.show();
        }
    }
});