AE实现鹰眼功能
效果图：
源代码：
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using ESRI.ArcGIS.Carto;using ESRI.ArcGIS.Geometry;using ESRI.ArcGIS.Display;namespace 鹰眼功能{ public partial class Form1 : Form { public Form1() { ESRI.ArcGIS.RuntimeManager.Bind(ESRI.ArcGIS.ProductCode.EngineOrDesktop); InitializeComponent(); } //--1、让两个MapControl显示的数据保持一致,让两个控件的数据共享 //--1、OnMapReplaced当mapcontrol1中的地图被替换时，该方法自动加载主空间中所有的图层对象到鹰眼中 //--1、而如果使用传递两个控件之间的Map属性这种方法完成数据共享，因为map属性同时传递了地图对象的范围和比例， //--1、造成鹰眼时图中不能够显示完整的地图 private void axMapControl1_OnMapReplaced(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMapReplacedEvent e) { //获得mapcontrol1的map对象 IMap map = axMapControl1.Map; //遍历map中的图层，都添加到mapcontrol2中 for (int i = 0; i < map.LayerCount; i++) { axMapControl2.AddLayer(map.get_Layer(i)); } } //--2、在主控件中使用鼠标拖拽视图的时候，鹰眼控件中出现红色矩形框 //--2、该方法发生在主视图的范围发生变换后， private void axMapControl1_OnExtentUpdated(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnExtentUpdatedEvent e) { //得到新范围 IEnvelope2 envelope = e.newEnvelope as IEnvelope2; //生成一个矩形要素 IRectangleElement rectangleelement = new RectangleElementClass(); //得到一个要素并将矩形要素传入 IElement element = rectangleelement as IElement; //将新范围赋值给要素的几何外形 element.Geometry = envelope; //得到RGBColor对象 IRgbColor color = new RgbColorClass(); //设置Color的RGB值 color.RGB = 00000255; //设置透明度 color.Transparency = 255; //产生一个线状符号 ILineSymbol lineSymbool = new SimpleLineSymbolClass(); //设置线状符号的属性 lineSymbool.Width = 1; lineSymbool.Color = color; //设置颜色属性 color.RGB = 255; color.Transparency = 0; //生成一个填充符号用来填充矩形区域 IFillSymbol fillSymbol = new SimpleFillSymbolClass(); //设置填充符号的属性 //填充色 fillSymbol.Color = color; //外轮廓 fillSymbol.Outline = lineSymbool; //得到一个填充图形要素，AE帮助中对IFillShapElement的解释为 /*IFillShapeElement is a generic interface implemented by all 2d elements (CircleElement, * EllipseElement, PolygonElement, and RectangleElement). * Use this interface when you want to retrieve or set the fill symbol being used by one * of the fill shape elements. */ IFillShapeElement fillShapElement = element as IFillShapeElement; //将填充符号传入Symbol中 fillShapElement.Symbol = fillSymbol; //最后将填充图形要素赋值给要素类 element = fillShapElement as IElement; //得到图像容器,并将mapcontrol2的map传入 IGraphicsContainer graphicsContainer = axMapControl2.Map as IGraphicsContainer; //得到一个活动视图并将graphicscontainer传入 IActiveView activeView = graphicsContainer as IActiveView; //在绘制新的矩形框前，清楚Map对象中的任何图形元素 graphicsContainer.DeleteAllElements(); //将要素添加到图像容器中,并将其置于顶层0 graphicsContainer.AddElement(element, 0); //将图像容器装入活动视图中并刷新 activeView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null); } //--3、在鹰眼视图中通过拖拽改变主视图中地图的显示位置 //是否执行拖拽开关 Boolean moveView = false; //鼠标按下时 private void axMapControl2_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e) { moveView = true; } //鼠标移动时 private void axMapControl2_OnMouseMove(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseMoveEvent e) { //判断鼠标是否被按下 if (moveView) { IPoint point = new PointClass(); point.PutCoords(e.mapX, e.mapY); //改变主控件的视图范围 axMapControl1.CenterAt(point); } } //鼠标抬起时 private void axMapControl2_OnMouseUp(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseUpEvent e) { moveView = false; } }}