flex Graphics例子

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
      xmlns:s="library://ns.adobe.com/flex/spark"
      xmlns:mx="library://ns.adobe.com/flex/halo"
      minWidth="1024" minHeight="768" xmlns:mx1="library://ns.adobe.com/flex/mx">
 
 <fx:Script>
  <![CDATA[
   import flash.geom.Matrix;
   
   /*
   畫圖形之前必要調用的函數（其中之一即可）：
   linestyle()、beginFill()、lineGradientStyle()、beginGradientFill()、beginBitmapFill()方法來設定線條樣式和/或填充。
   */
   
   //畫矩形
   private function rect(rectX:Number, rectY:Number, rectWidth:Number, rectHeight:Number):void{
    rectBoxID.graphics.clear();
    if(radioLineID.selected){    //線性
     rectBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
    }else if(radioGradientID.selected){    //漸層
     var matr:Matrix = new Matrix();
     matr.createGradientBox(20, 20, 0, 0, 0);
     //the last parameter can selete three type: SpreadMethod.PAD or SpreadMethod.REFLECT or SpreadMethod.REPEAT.
     rectBoxID.graphics.beginGradientFill(GradientType.LINEAR, [0xFF0000, 0x00FF00], [1, 1], [0x00, 0xFF], matr, SpreadMethod.REPEAT);
    }else if(radioFullID.selected){    //填充
     rectBoxID.graphics.beginFill(0xFF0000, 1.0);
    }
    rectBoxID.graphics.drawRect(rectX, rectY, rectWidth, rectHeight);
    //   
   }
   
   //畫圓角矩形
   private function circleRect(cRectX:Number, cRectY:Number, cRectWidth:Number, cRectHeight:Number, cRectDU:Number):void{
    cRectBoxID.graphics.clear();
    if(radioLineID.selected){    //線性
     cRectBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
    }else if(radioGradientID.selected){    //漸層
     //the last parameter can selete three type: SpreadMethod.PAD or SpreadMethod.REFLECT or SpreadMethod.REPEAT.
     cRectBoxID.graphics.beginGradientFill(GradientType.LINEAR, [0xFF0000, 0x0000FF], [1, 0.1], [0, 255], new Matrix(), SpreadMethod.PAD);
     rectBoxID.graphics.endFill();
    }else if(radioFullID.selected){    //填充
     cRectBoxID.graphics.beginFill(0xFF0000, 1.0);
    }
    cRectBoxID.graphics.drawRoundRect(cRectX, cRectY, cRectWidth, cRectHeight, cRectDU);
   }
   
   //畫直線
   private function line(lineX:Number, lineY:Number):void{    //兩個參數都表示從起始的位置座標x、y相加這兩個參數後值就是結束的x、y值
    lineBoxID.graphics.clear();
    if(radioLineID.selected){    //線性
     lineBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
    }else if(radioGradientID.selected){    //漸層
     lineBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
     lineBoxID.graphics.lineGradientStyle(GradientType.LINEAR, [0xFF0000, 0x0000FF], [1, 0.5], [0, 255], new Matrix(), SpreadMethod.PAD);
    }else if(radioFullID.selected){    //（填充）直線不存在填充的，呵呵
     lineBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
    }
    lineBoxID.graphics.lineTo(lineX, lineY);
   }
   
   //畫曲線
   private function cLine(endX:Number, endY:Number):void{
    cLineBoxID.graphics.clear();
    if(radioLineID.selected){    //線性
     cLineBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
    }else if(radioGradientID.selected){    //漸層
     var matr:Matrix = new Matrix();
     matr.createGradientBox(20, 20, 0, 0, 0);
     cLineBoxID.graphics.beginGradientFill(GradientType.LINEAR, [0xFF0000, 0x00FF00, 0xFF0000], [0.2, 1, 1], [0, 128, 255], matr, SpreadMethod.REFLECT);
    }else if(radioFullID.selected){    //填充
     cLineBoxID.graphics.beginFill(0xFF0000);
    }
    cLineBoxID.graphics.curveTo(100, 80, endX, endY);    //前兩個參數表示弧度的位移量，後兩個參數表示結束點的x、y座標
   }
   
   //畫圓
   private function circle(oX:Number, oY:Number, radius:Number):void{
    circleBoxID.graphics.clear();
    if(radioLineID.selected){    //線性
     circleBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
    }else if(radioGradientID.selected){    //漸層
     var matr:Matrix = new Matrix();
     matr.createGradientBox(20, 20, 0, 0, 0);
     circleBoxID.graphics.beginGradientFill(GradientType.LINEAR, [0xFF0000, 0x00FF00, 0xFF0000], [0.2, 1, 1], [0, 128, 255], matr, SpreadMethod.REFLECT, "rgb", 0.7);
    }else if(radioFullID.selected){    //填充
     circleBoxID.graphics.beginFill(0xFF0000);
    }
    circleBoxID.graphics.drawCircle(oX, oY, radius);
   }
   
   //畫橢圓
   private function tCircle(x:Number, y:Number, tWidth:Number, tHeight:Number):void{
    tCircleBoxID.graphics.clear();
    if(radioLineID.selected){    //線性
     tCircleBoxID.graphics.lineStyle(20, 0xFF0000, 1.0, false, LineScaleMode.VERTICAL, CapsStyle.NONE, JointStyle.MITER, 100);
    }else if(radioGradientID.selected){    //漸層
     var matr:Matrix = new Matrix();
     matr.createGradientBox(20, 20, 0, 0, 0);
     //the last parameter can selete three type: SpreadMethod.PAD or SpreadMethod.REFLECT or SpreadMethod.REPEAT.
     tCircleBoxID.graphics.beginGradientFill(GradientType.LINEAR, [0xFF0000, 0x00FF00], [1.0, 1.0], [0x00, 0xFF], matr, SpreadMethod.REPEAT);
    }else if(radioFullID.selected){    //填充
     tCircleBoxID.graphics.beginFill(0xFF0000);
    }
    tCircleBoxID.graphics.drawEllipse(x, y, tWidth, tHeight);
   }
   
  ]]>
 </fx:Script>
 
 <!--畫矩形-->
 <mx1:Button id="rectButID" x="500" y="50" label="畫矩形" click="rect(100, 20, 250, 50);"/>
 <mx1:Box id="rectBoxID"/>
 
 <!--畫圓角矩形-->
 <mx1:Button id="cRectButID" x="500" y="120" label="畫圓角矩形" click="circleRect(100, 100, 300, 80, 50);"/>
 <mx1:Box id="cRectBoxID"/>
 
 <!--畫直線-->
 <mx1:Button id="lineButID" x="500" y="250" label="畫直線" click="line(350, 0);"/>
 <mx1:Box id="lineBoxID" x="50" y="250"/>
 
 <!--畫曲線-->
 <mx1:Button id="cLineButID" x="500" y="350" label="畫曲線" click="cLine(300, 0);"/>
 <mx1:Box id="cLineBoxID" x="100" y="300"/>
 
 <!--畫圓-->
 <mx1:Button id="circleButID" x="500" y="450" label="畫圓" click="circle(250, 450, 50);"/>
 <mx1:Box id="circleBoxID"/>
 
 <!--畫橢圓-->
 <mx1:Button id="tCircleButID" x="500" y="550" label="畫橢圓" click="tCircle(120, 520, 150, 50);"/>
 <mx1:Box id="tCircleBoxID"/>
 
 <mx1:RadioButton id="radioLineID" x="600" y="50" label="線性"/>
 <mx1:RadioButton id="radioGradientID" x="750" y="50" label="漸層" selected="true"/>
 <mx1:RadioButton id="radioFullID" x="900" y="50" label="填充"/>
 
</s:Application>