第二章 ActionScript 3.0学习之画星星（鼠标及键盘事件）

今天觉得学到的比较有趣，所以记录之......~~~

下面这段就是画出星星的代码：StarShape.as

package {
	import flash.display.Shape;
	import flash.display.GradientType;

	public class StarShape extends Shape {
		public function StarShape (x:Number = 50, y:Number = 50, points:int = 5, innerRadius:Number = 20, outerRadius:Number = 50, angle:Number = 0, color:uint = 0xff0000) {//x和y是起始点~~
			var count = Math.abs(points);
			this.graphics.lineStyle(2, 0x85DB18);
			//开始填色
			this.graphics.beginFill(color);
			if (count > 2) {
				//init vars
				var step, halfStep, start, n, dx, dy;
				//计算两点之间的距离
				step = (Math.PI * 2) / points;
				halfStep = step / 2;
				//起始角度
				start = (angle / 180) * Math.PI;
				this.graphics.moveTo(x + (Math.cos(start) * outerRadius), y - (Math.sin(start) * outerRadius));
				//画星状图的边
				for (n = 1; n <= count; n++) {
					dx = x + Math.cos(start + (step * n) - halfStep) * innerRadius;
					dy = y - Math.sin(start + (step * n) - halfStep) * innerRadius;
					this.graphics.lineTo(dx, dy);
					dx = x + Math.cos(start + (step * n)) * outerRadius;
					dy = y - Math.sin(start + (step * n)) * outerRadius;
					this.graphics.lineTo(dx, dy);
				}
			}
			this.graphics.endFill();
		}
	}
}

　　具体显示效果如下：

鼠标点击和键盘按下事件练习（按下的按键是Alt，Shift，Ctrl,单个或两两组合，三个一起，同时点击鼠标）：

源码：

SampleSendAndLoad.as

package {
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.net.URLLoader;
	import flash.net.URLLoaderDataFormat;
	import flash.net.URLRequest;
	import flash.net.URLRequestMethod;
	import flash.events.ProgressEvent;
	import flash.text.TextField;

	public class SampleSendAndLoad extends Sprite {
		private var _result:TextField;
		public function SampleSendAndLoad() {
			//建立一个文本框对象，登录成功后返回SESSION ID
			_result = new TextField();
			_result.autoSize = "left";
			_result.wordWrap = true;
			_result.width = 300;
			addChild(_result);
			//登录信息，包含用户名和密码
			var loginXML:XML =
				<login>
					<username>Kingda.org</username>
					<password>ActionScript 3</password>
				</login>;
			var request:URLRequest = new URLRequest("http://www.flash-mx.com/mm/login_xml.cfm");
			request.contentType = "text/xml";
			request.data = loginXML.toXMLString();
			request.method = URLRequestMethod.POST;
			var loader:URLLoader = new URLLoader();
			loader.addEventListener(Event.COMPLETE, completeHandler);
			try {
				trace("loading......");
				loader.load(request);
			}catch (error:ArgumentError) {
				trace("参数错误");
			}catch (error:SecurityError) {
				trace("发生安全错误");
				_result.text = "发生安全错误。\n" + error;
			}

		}
		private function completeHandler(event:Event):void {
			trace(event.target.data);
			var resultXML:XML = new XML(event.target.data);
			_result.text = [email protected];
		}
	}
	}

　效果：　

可以测试一下上面的点击结果哦，嘻嘻~~新手笔记！！大婶别吐。