Input event type for mouse button events. Contains mouse click information. See [method Node._input]. [b]Note:[/b] On Wear OS devices, rotary input is mapped to [constant BUTTON_WHEEL_UP] and [constant BUTTON_WHEEL_DOWN]. This can be changed to [constant BUTTON_WHEEL_LEFT] and [constant BUTTON_WHEEL_RIGHT] with the [member ProjectSettings.input_devices/pointing/android/rotary_input_scroll_axis] setting. $DOCS_URL/tutorials/inputs/mouse_and_input_coordinates.html The mouse button identifier, one of the [enum ButtonList] button or button wheel constants. If [code]true[/code], the mouse button event has been canceled. If [code]true[/code], the mouse button's state is a double-click. The amount (or delta) of the event. When used for high-precision scroll events, this indicates the scroll amount (vertical or horizontal). This is only supported on some platforms; the reported sensitivity varies depending on the platform. May be [code]0[/code] if not supported. If [code]true[/code], the mouse button's state is pressed. If [code]false[/code], the mouse button's state is released.