基于Skyline的TerraExplorer6.1.1如何通过二次开发实现圆形对象的手动绘制

喜欢NDGIS · 发表于 2013-1-6 06:52:36

基于Skyline的TerraExplorer6.1.1如何通过二次开发实现圆形对象的手动绘制

<div class="postbody"><div id="cnblogs_post_body">在Skyline的TerraExplorer Pro软件中，用户可以轻松实现几何对象的手动绘制；但在实际的项目中，为了满足不同行业的需求，我们更多情况需要定制开发一些几何对象。这里，通过Skyline提供的开发接口实现圆形对象的绘制，希望能够扩展大家的一些实现思路。

<div class="cnblogs_code"><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>手绘圆</title>
   <script type = "text/javascript" language = "javascript">
      var gPolyObj = null;
      function StartCal() {
         var SGWorld = new CreateSGObj();
         SGWorld.AttachEvent("OnLButtonDown", DrawPolyLButtonDown);
         SGWorld.AttachEvent("OnFrame", DrawPolyOnFrame);
         SGWorld.Window.SetInputMode(1);
      }

      function EndCal() {
         var SGWorld = new CreateSGObj();
         SGWorld.DetachEvent("OnLButtonDown", DrawPolyLButtonDown);
         SGWorld.DetachEvent("OnFrame", DrawPolyOnFrame);
         SGWorld.Window.SetInputMode(0);
         SGWorld = null;
         gPolyObj = null;
      }

      function CreateTempGroup(groupname) {
         var SGWorld = new CreateSGObj();
         var gid = SGWorld.ProjectTree.FindItem(groupname);
         if (gid > 0) {

         }
         else {
               gid = SGWorld.ProjectTree.CreateLockedGroup(groupname, 0);
         }
         return gid;
      }

      function DelTemp(groupname) {
         var SGWorld = new CreateSGObj();
         var gid = SGWorld.ProjectTree.FindItem(groupname);
         if (gid > 0) {
               SGWorld.ProjectTree.DeleteItem(gid);
         }
      }

      var gPolyText = "圆";
      //********************************************绘制Circle
      function DrawPolyLButtonDown(Flags, X, Y) {
         try {
               var SGWorld = CreateSGObj();
               var CursorCoord = SGWorld.Window.pixelToWorld(X, Y);
               if (CursorCoord == null)
                  return false;

               if (gPolyObj == null) {
                  var gid = CreateTempGroup("标绘");
                  var pos = SGWorld.Creator.CreatePosition(CursorCoord.Position.X, CursorCoord.Position.Y, 0, 2, 0, 0, 0, 0);
                  gPolyObj = SGWorld.Creator.CreateCircle(pos, 1, SGWorld.Creator.CreateColor(255, 0, 0, 1), SGWorld.Creator.CreateColor(255, 0, 0, 1), gid, gPolyText);
                  gPolyObj.LineStyle.Width = 1;
               }
               else {
                  EndCal();
               }
         }
         catch (e)
         { }
      }
      //-----------
      // 跟随鼠标位置移动，改变圆半径大小
      //-----------
      function DrawPolyOnFrame() {
         try {
               var SGWorld = CreateSGObj();
               if (gPolyObj != null) {

                  var mouseInfo = SGWorld.Window.GetMouseInfo();
                  var CursorCoord = SGWorld.Window.pixelToWorld(mouseInfo.X, mouseInfo.Y);
                  if (CursorCoord == null)
                     return false;
                  var dr = gPolyObj.Position.DistanceTo(CursorCoord.Position);
                  gPolyObj.Radius = dr;
               }
         }
         catch (e) { }
      }

      /*
      功能: 创建sgworld对象
      备注: 赵贺 2011.04.01.
      */
      function CreateSGObj() {
         var obj = $("sgworld");
         if (obj == null) {
               obj = document.createElement('object');
               document.body.appendChild(obj);
               obj.name = "sgworld";
               obj.id = "sgworld";
               obj.classid = "CLSID:3a4f91b1-65a8-11d5-85c1-0001023952c1";
         }
         return obj;
      }
      function $(id) {
         return window.document.getElementById(id);
      }
   </script>
</head>
<body onunload="DelTemp('标绘')">
<table style="margin: 0px; border: 0px;">
      <tr>
         <td colspan="4">
            <input id="Button6" type="button" value="绘制" onclick="StartCal()" />
            <input id="Button1" type="button" value="清除" onclick="DelTemp('标绘')" />
         </td>
      </tr>
</table>
</body>
</html>

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基于Skyline的TerraExplorer6.1.1如何通过二次开发实现圆形对象的手动绘制

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