flex Graphics例子

<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()方法來設置線條樣式和/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){ //漸變
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){ //漸變
//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){ //漸變
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){ //漸變
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偏移量，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){ //漸變
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){ //漸變
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="漸變" selected="true"/>
<mx1:RadioButton id="radioFullID" x="900" y="50" label="填充"/>

</s:Application>