actionscript-3 - 弹性 : Determine if Space key is held down during MouseEvent

Question

MouseEvent 类具有属性 altKey、ctrlKey 和 shiftKey，我可以使用它们来确定是否事件发生时按住了修饰键(即 Alt、Ctrl 和 Shift)。

但我想确定在 MouseEvent 期间是否按住了 Space 键。我怎样才能做到这一点？

Answer 1

正如@Timofei Davydik 所建议的，我通过监听KeyboardEvent 并设置一个标志来指示所按住的空格键的状态，以“手动”方式执行此操作。然后我只需在 MouseEvent 的监听器中使用此标志的值。代码有点像这样(您可以添加您需要观看的任何其他键):

KeyboardEvent 监听器:

public class ModifierKeyboard
{
    /**
     *determine whether space key is held down
     */
    public static var spaceIsHeld:Boolean = false;

    /**
     * this handles the keyDown event on main app
     */
    public static function app_keyDownHandler(event:KeyboardEvent):void
    {
        switch (event.keyCode)
        {
            case Keyboard.SPACE:
                if (!spaceIsHeld)
                {
                    spaceIsHeld = true;
                }
                break;
        }
    }

    /**
     * this handles the keyUp event on main app
     */
    public static function app_keyUpHandler(event:KeyboardEvent):void
    {
        switch (event.keyCode)
        {           
            case Keyboard.SPACE:
                spaceIsHeld = false;
                break;
        }
    }
}