动态添加工具栏下拉菜单,丰富了工具栏的功能，下拉菜单将常用的功能隐藏起来，得到更好的工具栏外观效果.-Dynamically add a toolbar drop-down menu,Enriches the functions of the toolbar,Frequently used functions of the drop-down menu to hide,Toolbar looks better results,

工具栏的界面，动态效果，鼠标移动到控件上会产生变化-Toolbar interface, dynamic effects, to control the mouse will change