flex游戏引擎(PushButton)-控制输入(1)
InputManager可以完成一些简单的控制，但是当你要完成较复杂的控制时应使用InputMap，虽然InputManager使用较简单如下：
1.if(InputManager.isKeyDown(InputKey.UP)) 2.???moveItemUp(); ?
当你有第三方设备输入（比如手柄等），当你要控制键盘和鼠标，你可以采用一种一致的方式去处理它们，这种方式就是使用InputMap，提供一个回调函数，一个输入名称，一个数字参数， Digital inputs (buttons) will be called back with 0 or 1 based on if the button is up or down.用0和1表示键盘的 起来和按下，Analog inputs (mouse) will be called back with the change in position of the input.鼠标使用位置参数。
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01.public class MyInputHandlingComponent extends TickedComponent 02.{ 03.???public function get input():InputMap 04.???{ 05.??????return _inputMap; 06.???} 07.????? 08.???public function set input(value:InputMap):void 09.???{ 10.??????_inputMap = value; 11.???????? 12.??????if (_inputMap != null) 13.??????{ 14.?????????_inputMap.addBinding("GoLeft", _onLeft); 15.?????????_inputMap.addBinding("GoRight", onRight); 16.??????} 17.???} 18.???public override function onTick(tickRate:Number):void 19.???{ 20.??????// Normally you would update your position based on this; for simplicity 21.??????// we just print the direction we are being indicated to move. 22.??????var direction:Number = right - left; 23.??????Logger.print(this, "I am moving " + direction); 24.???} 25.????? 26.???private function onLeft(value:Number):void 27.???{ 28.??????left = value; 29.???} 30.???private function onRight(value:Number):void 31.???{ 32.??????right = value; 33.???} 34.????? 35.????? 36.???private var _inputMap:InputMap; 37.???private var _left:Number = 0; 38.???private var _right:Number = 0; 39.} level XML做为实体一部分被启动，注意：你定义输入做为level一部分，更易于支持多人在同一个输入设备游戏01.<entity name="InputHandlingEntity"> 02.???<component class="MyInputHandlingComponent" name="Input"/> 03.??????<Input> 04.?????????<!-- These correspond to the calls to AddBinding above. --> 05.?????????<GoLeft>LEFT</GoLeft> 06.?????????<GoRight>RIGHT</GoRight> 07.??????</Input> 08.???</component> 09.</entity> 鼠标绑定:?
?1.<entity name="MouseInputHandlingEntity"> 2.???<component class="MyInputHandlingComponent" name="Input"/> 3.??????<Input> 4.?????????<!-- These correspond to the calls to AddBinding above.? Only GoLeft needs to be bound because MOUSE_X gives negative as well as positive results. --> 5.?????????<GoLeft>MOUSE_X</GoLeft> 6.??????</Input> 7.???</component> 8.</entity>