Enumeration Members
LEFT_CLICK
LEFT_CLICK: 2
LEFT_DOUBLE_CLICK
LEFT_DOUBLE_CLICK: 3
LEFT_DOWN
LEFT_DOWN: 0
LEFT_UP
LEFT_UP: 1
MIDDLE_CLICK
MIDDLE_CLICK: 12
MIDDLE_DOWN
MIDDLE_DOWN: 10
MIDDLE_UP
MIDDLE_UP: 11
MOUSE_MOVE
MOUSE_MOVE: 15
MOUSE_PAN
MOUSE_PAN: 4
PINCH_END
PINCH_END: 18
PINCH_MOVE
PINCH_MOVE: 19
PINCH_START
PINCH_START: 17
RIGHT_CLICK
RIGHT_CLICK: 7
RIGHT_DOWN
RIGHT_DOWN: 5
RIGHT_UP
RIGHT_UP: 6
WHEEL
WHEEL: 16
鼠标事件类型