class in UnityEngine.Experimental.UIElements
切换到手册A class holding information about the event that triggered the display of the drop-down menu.
| localMousePosition | If the triggering event was a mouse event, this property is the mouse position. The position is expressed using the coordinate system of the element that received the mouse event. Otherwise this property is zero. |
| modifiers | If modifier keys (Alt, Control, Shift, Windows/Command) were pressed to trigger the display of the dropdown menu, this property lists the modifier keys. |
| mousePosition | If the triggering event was a mouse event, this property is the mouse position expressed using the global coordinate system. Otherwise this property is zero. |
| DropdownMenu.EventInfo | 构造函数。 |