silverlight基础2-path对象使用总结

silverlight中path对象使用总结（本文转载自http://www.cnblogs.com/daizhj/archive/2008/07/14/1242181.html）

Path对象用于绘制相边的一系列线条或曲线对象，线条和曲线的尺寸是通过数据属性声明。 
 
请参见下面代码及其注释（xaml/pathscene.xaml）： 

<!-- EllipseGeometry -->
   < Path  Fill ="Gold"  Stroke ="Black"  StrokeThickness ="1" >
     < Path.Data >
       < EllipseGeometry  Center ="50,50"  RadiusX ="50"  RadiusY ="50"   />
     </ Path.Data >
   </ Path >

   <!-- RectangleGeometry -->
   < Path  Fill ="Gold"  Stroke ="Black"  StrokeThickness ="1" >
     < Path.Data >
       < RectangleGeometry  Rect ="250,0,100,100"    />
       <!-- 左，上，长，高 -->
     </ Path.Data >
   </ Path >

   <!-- PathGeometry -->
   < Path  Stroke ="Black"  StrokeThickness ="1" >
     < Path.Data >
       < PathGeometry >
         < PathGeometry.Figures >
           < PathFigure  StartPoint ="10,200" >
             <!-- 起点坐标（左，高） -->
             < PathFigure.Segments >
               < LineSegment  Point ="100,130" />
               <!-- 终点坐标（左，高） -->
             </ PathFigure.Segments >
           </ PathFigure >
         </ PathGeometry.Figures >
       </ PathGeometry >
     </ Path.Data >
   </ Path >

   <!-- LineGeometry -->
   < Path  Stroke ="Red"  StrokeThickness ="10"   >
     < Path.Data >
       < LineGeometry  StartPoint ="100,200"  EndPoint ="180,140"   />
     </ Path.Data >
   </ Path >


   <!-- GeometryGroup组合的几何类型 -->
   < Path  Stroke ="Black"  StrokeThickness ="1"  Fill ="#CCCCFF" >
     < Path.Data >
       <!--  Creates a composite shape from two geometries.  -->
       < GeometryGroup  FillRule ="EvenOdd" >
         < LineGeometry  StartPoint ="220,200"  EndPoint ="390,250"   />
         < EllipseGeometry  Center ="250,200"  RadiusX ="40"  RadiusY ="40"   />
         < RectangleGeometry  Rect ="250, 150, 100, 100"   />
       </ GeometryGroup >
     </ Path.Data >
   </ Path >

 
     运行结果如下图（图中数字顺序为其代码的分布次序）：

    
 
 
     下面演示使用createFromXaml动态加载上面的xaml内容的js脚本(xaml\CreateFromXaml.js):

Silverlight_JsWeb.CreateFromXaml.prototype =
{
    handleLoad: function(plugIn, userContext, sender) 
    {
        this.plugIn = plugIn;
        
        // 按钮事件挂钩示例: 查找按钮，然后附加事件处理程序
        sender.findName("container").addEventListener("MouseLeftButtonDown", Silverlight.createDelegate(this, 
        this.handleMouseLeftButtonDown));
    },
    
    // 事件处理程序示例
    handleMouseLeftButtonDown:function (sender, eventArgs)
    {    
        this.createXaml(sender);
    },
    
    createXaml:function (sender)
    {
        
        var plugin = sender.getHost();
        //同心圆
        var xamlFragment = ' < Path  Fill ="Gold"  Stroke ="Black"  StrokeThickness ="1" > ';
            xamlFragment += ' < Path.Data > ';
            xamlFragment += '   < GeometryGroup > ';
            xamlFragment += '     < EllipseGeometry  Center ="60,80"  RadiusX ="50"  RadiusY ="50"   /> ';
            xamlFragment += '     < EllipseGeometry  Center ="60,80"  RadiusX ="30"  RadiusY ="30"   /> ';
            xamlFragment += '   </ GeometryGroup > ';
            xamlFragment += ' </ Path.Data > ';         
            xamlFragment += ' </ Path > ';        

         sender.children.add(plugin.content.createFromXaml(xamlFragment, false));
         
         //矩形RectangleGeometry
         xamlFragment = ' < Path  Fill ="Gold"  Stroke ="Black"  StrokeThickness ="1" > ';
            xamlFragment += '     < Path.Data > ';
            xamlFragment += '         < RectangleGeometry  Rect ="200,30,100,100"    /> ';
            xamlFragment += '         <!-- 左，上，长，高 --> ';
            xamlFragment += '     </ Path.Data > ';
            xamlFragment += ' </ Path > ';

         sender.children.add(plugin.content.createFromXaml(xamlFragment, false));          
          
         //直线PathGeometry
         xamlFragment = ' < Path  Stroke ="Black"  StrokeThickness ="1" > ';
            xamlFragment += ' < Path.Data > ';
            xamlFragment += '     < PathGeometry > ';
            xamlFragment += '         < PathGeometry.Figures > ';
            xamlFragment += '             < PathFigure  StartPoint ="10,200" > ';
            xamlFragment += '                 <!-- 起点坐标（左，高） --> ';
            xamlFragment += '                 < PathFigure.Segments > ';
            xamlFragment += '                     < LineSegment  Point ="100,130" /> ';
            xamlFragment += '                     <!-- 终点坐标（左，高） --> ';
            xamlFragment += '                 </ PathFigure.Segments > ';
            xamlFragment += '             </ PathFigure > ';
            xamlFragment += '         </ PathGeometry.Figures > ';
            xamlFragment += '     </ PathGeometry > ';
            xamlFragment += ' </ Path.Data > ';
            xamlFragment += ' </ Path > ';
            
         sender.children.add(plugin.content.createFromXaml(xamlFragment, false));   
         
         //   <!-- LineGeometry -->
         xamlFragment = ' < Path  Stroke ="Red"  StrokeThickness ="10"   > ';
            xamlFragment += ' < Path.Data > ';
            xamlFragment += '     < LineGeometry  StartPoint ="100,200"  EndPoint ="180,140"   /> ';
            xamlFragment += ' </ Path.Data > ';
            xamlFragment += ' </ Path > ';     
            
         sender.children.add(plugin.content.createFromXaml(xamlFragment, false));   
         
         
         // <!-- GeometryGroup组合的几何类型 -->
         xamlFragment = ' < Path  Stroke ="Black"  StrokeThickness ="1"  Fill ="#CCCCFF" > ';  
            xamlFragment += ' < Path.Data > ';  
            xamlFragment += '     <!--  Creates a composite shape from two geometries.  --> ';  
            xamlFragment += '     < GeometryGroup  FillRule ="EvenOdd" > ';  
            xamlFragment += '         < LineGeometry  StartPoint ="220,200"  EndPoint ="390,250"   /> ';  
            xamlFragment += '         < EllipseGeometry  Center ="250,200"  RadiusX ="40"  RadiusY ="40"   /> ';  
            xamlFragment += '         < RectangleGeometry  Rect ="250, 150, 100, 100"   /> ';  
            xamlFragment += '     </ GeometryGroup > ';  
            xamlFragment += ' </ Path.Data > ';  
            xamlFragment += ' </ Path > ';  
            
         sender.children.add(plugin.content.createFromXaml(xamlFragment, false));  

//        sender.children.add(ellipse);
//        var xamlFragment = ' < TextBlock  Canvas.Top ="0"  Text ="createFromXaml 方法调用!"   /> ';
//        textBlock = plugin.content.createFromXaml(xamlFragment, false); 
//        
//        var xamlFragment2 = ' < Ellipse  Canvas.ZIndex ="1"  Canvas.Left ="95"  Canvas.Top ="95"  Height ="200"  
//                          Width ="200"  Stroke ="Black"  StrokeThickness ="10"  Fill ="Lime"   /> ';
//        ellipse = plugin.content.createFromXaml(xamlFragment2, false); 
//        ellipse.fill = this.createLinearGradientBrush(plugin);       
//        
//        sender.children.add(textBlock);
//        sender.children.add(ellipse);
    },
    
    createLinearGradientBrush:function (plugin)
    {    
        var xamlFragment = ' < LinearGradientBrush > ';
           xamlFragment +=   ' < GradientStop  Color ="Yellow"  Offset ="0.0"   /> ';
           xamlFragment +=   ' < GradientStop  Color ="Orange"  Offset ="0.5"   /> ';
           xamlFragment +=   ' < GradientStop  Color ="Red"  Offset ="1.0"   /> ';
           xamlFragment += ' </ LinearGradientBrush > '; 
        return plugin.content.createFromXaml(xamlFragment);
    }
}

     源码下载，请点击这里:)