This class provides information about the event that triggered displaying 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, Ctrl, 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. |
| DropdownMenuEventInfo | コンストラクター |