event.isAltDown

概述

指示在鼠标事件发生时是否按住 Alt 键。

示例

-- Called when a mouse event has been received.
local function onMouseEvent( event )
    if event.isAltDown then
        -- The alt button is currently pressed down.
    else
        -- The alt button is not being pressed.
    end
end
                             
-- Add the mouse event listener.
Runtime:addEventListener( "mouse", onMouseEvent )