基于地图开发控件GMap.Net 使用 (五) 原创 用户自定义标签图片

最近看到 fangping朋友的提问问是否可以自定义标签，相信大家对此问题都挺关注。回头看看Gmap动态库还真没提供此功能。自己添加一个！打开开源源码创建一个类名为GMapMarkerImage的类。此类功能：用户可添加自定义图片标签。

添加源码如下：

View Code

   
     

    
       
    
      public
    
       
    
      class
    
       GMapMarkerImage : GMapMarker
 {
 
    
      public
    
       
    
      float
    
      ?
    
       Bearing;

 
    
      private
    
       Image userImage
    
      =
    
      null
    
      ;

 
    
      public
    
       GMapMarkerImage(PointLatLng p)
 : 
    
      base
    
      (p)
 {
 Size 
    
      =
    
       
    
      new
    
       System.Drawing.Size(Resources.bigMarkerGreen.Width, Resources.bigMarkerGreen.Height);
 Offset 
    
      =
    
       
    
      new
    
       Point(
    
      -
    
      10
    
      , 
    
      -
    
      34
    
      );
 }

 
    
      public
    
       GMapMarkerImage(PointLatLng p ,
    
      string
    
       imageFile)
 : 
    
      base
    
      (p)
 {
 Size 
    
      =
    
       
    
      new
    
       System.Drawing.Size(Resources.bigMarkerGreen.Width, Resources.bigMarkerGreen.Height);
 Offset 
    
      =
    
       
    
      new
    
       Point(
    
      -
    
      10
    
      , 
    
      -
    
      34
    
      );
 
    
      try
    
      
 {
 userImage 
    
      =
    
       Bitmap.FromFile(imageFile);
 userImage 
    
      =
    
       
    
      new
    
       Bitmap(
    
      0
    
      , 
    
      0
    
      );
 }
 
    
      catch
    
      
 {
 
 }
 }

 
    
      public
    
       GMapMarkerImage(PointLatLng p, Image imageFile)
 : 
    
      base
    
      (p)
 {
 Size 
    
      =
    
       
    
      new
    
       System.Drawing.Size(Resources.bigMarkerGreen.Width, Resources.bigMarkerGreen.Height);
 Offset 
    
      =
    
       
    
      new
    
       Point(
    
      -
    
      10
    
      , 
    
      -
    
      34
    
      );
 userImage 
    
      =
    
       imageFile;
 }

 
    
      static
    
       
    
      readonly
    
       Point[] Arrow 
    
      =
    
       
    
      new
    
       Point[] { 
    
      new
    
       Point(
    
      -
    
      7
    
      , 
    
      7
    
      ), 
    
      new
    
       Point(
    
      0
    
      , 
    
      -
    
      22
    
      ), 
    
      new
    
       Point(
    
      7
    
      , 
    
      7
    
      ), 
    
      new
    
       Point(
    
      0
    
      , 
    
      2
    
      ) };

 
    
      public
    
       
    
      override
    
       
    
      void
    
       OnRender(Graphics g)
 {

    
      #if
    
       !PocketPC
    
      
 
 g.TranslateTransform(ToolTipPosition.X, ToolTipPosition.Y);

 g.ResetTransform();

 
    
      if
    
       (
    
      !
    
      Bearing.HasValue)
 {
 g.DrawImageUnscaled(userImage, LocalPosition.X, LocalPosition.Y);
 }

    
      #else
    
      
 DrawImageUnscaled(g, Resources.shadow50, LocalPosition.X, LocalPosition.Y);
 DrawImageUnscaled(g, Resources.marker, LocalPosition.X, LocalPosition.Y);

    
      #endif
    
      
 
    
      base
    
      .OnRender(g);
 }
   
     

喜洋洋同学就到地图上面了