Input event type for mouse button events.
Contains mouse click information. See [method Node._input].
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- The mouse button identifier, one of the [enum ButtonList] button or button wheel constants.
- 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.