Ext.define('Ext.rtl.layout.container.boxOverflow.Scroller', { override: 'Ext.layout.container.boxOverflow.Scroller', getWheelDelta: function(e) { var layout = this.layout, delta = e.getWheelDelta(); if (layout.direction === 'horizontal' && layout.owner.getInherited().rtl) { delta = -delta; } return delta; }});