ArcEngine 鹰眼的实现.doc

ArcEngine 鹰眼的实现using System;using System.Collections.Generic;using System.Text;using ESRI.ArcGIS.Carto;using ESRI.ArcGIS.Controls;using ESRI.ArcGIS.Geometry;using ESRI.ArcGIS.Display;namespace ArcEngineCommon.Controlspublic class MapMapControlEagle/记录层的内容以及次序(使用字典)private System.Collections.Generic.Dictionary _layerLog;/地图的主显示控件private AxMapControl _mapControlMain;/地图的鹰眼显示控件private AxMapControl _mapControlEagle;/Activeview操作对象private ActiveView _activeView;/渲染的样式private IFillSymbol _fillSymbol;/记录移动的个数，为移动过程中显示红框用。private int _moveCount = 0;/标识是否在拖动private bool _isTrackingSmallViewer = false;/红色的框范围private IEnvelope _envelope;/鹰眼小地图的红框private IMoveEnvelopeFeedback _smallViewerEnvelope;/拖动时鼠标落点private IPoint _smallViewerMouseDownPt;/ / 鹰眼显示程序/ / 主地图显示控件/ 鹰眼地图显示控件public MapMapControlEagle(AxMapControl pMapControlMain, AxMapControl pMapControlEagle)this._mapControlMain = pMapControlMain;this._mapControlEagle = pMapControlEagle;this._layerLog = new Dictionary();this._activeView = new ActiveView(this._mapControlEagle.ActiveView);/注册地图主控件视图范围更新事件this._mapControlMain .OnExtentUpdated +=new IMapControlEvents2_Ax_OnExtentUpdatedEventHandler(this.axMapControlMian_OnExtentUpdated);/注册地图主控件视图数据更新事件this._mapControlMain.OnAfterScreenDraw += new IMapControlEvents2_Ax_OnAfterScreenDrawEventHandler(this.axMapControl_OnAfterScreenDraw);/注册鹰眼地图控件的点击居中this._mapControlEagle .OnMouseDown +=new IMapControlEvents2_Ax_OnMouseDownEventHandler(this.axMapControl2_OnMouseDown);this._mapControlEagle .OnMouseMove +=new IMapControlEvents2_Ax_OnMouseMoveEventHandler(this.axMapControl2_OnMouseMove);this._mapControlEagle .OnMouseUp +=new IMapControlEvents2_Ax_OnMouseUpEventHandler(this.axMapControl2_OnMouseUp);/当地图主控件视图范围刷新时触发private void axMapControlMian_OnExtentUpdated(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnExtentUpdatedEvent e)/得到地图主控件新的显示范围IEnvelope myEnvelope = e.newEnvelope as IEnvelope;/清除鹰眼地图显示控件上面的所有的元素this._mapControlEagle.ActiveView.GraphicsContainer.DeleteAllElements();/定义要画到鹰眼控件上面的元素对象IRectangleElement myRectangeElement = new RectangleElementClass();IElement myElemnet = myRectangeElement as IElement;myElemnet.Geometry = myEnvelope;this._envelope =myEnvelope ;/定义颜色IRgbColor myRgbColor = new RgbColorClass();myRgbColor.Red = 255;myRgbColor.Green = 0;myRgbColor.Blue = 0;/设置外边线ILineSymbol myLineSymbol = new SimpleLineSymbolClass();myLineSymbol.Color = myRgbColor as IColor;myLineSymbol.Width = 1.5;/设置矩形内部渲染样式IRgbColor myFillColor=new RgbColorClass ();myFillColor .Transparency =0;IFillSymbol myFillSymbol = new SimpleFillSymbolClass();myFillSymbol.Color = myFillColor as IColor;myFillSymbol.Outline = myLineSymbol;IFillShapeElement myFillShapeelment = myRectangeElement as IFillShapeElement;myFillShapeelment.Symbol = myFillSymbol;this._fillSymbol = myFillSymbol;/把设置好的元素添加到鹰眼地图上面this._mapControlEagle.ActiveView.GraphicsContainer.AddElement(myElemnet,0);this._mapControlEagle.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);/当mapControl数据发生变化重绘时触发(主要是用来判断层的添加，删除以及次序变化)private void axMapControl_OnAfterScreenDraw(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnAfterScreenDrawEvent e)/如果不一致，就刷新鹰眼地图if (!this.CompareLayers(this._layerLog, this._mapControlMain.ActiveView.FocusMap)/记录当前图层记录this.LogLayers(this._layerLog, this._mapControlMain.ActiveView.FocusMap);/刷新鹰眼层配置this._activeView.SetFocusMap(this._mapControlMain.ActiveView.FocusMap);/全图this._mapControlEagle.ActiveView.Extent = this._mapControlEagle.ActiveView.FullExtent;this._mapControlEagle.ActiveView.Refresh();/地图控件点击居中，主要是针对鹰眼地图设计private void axMapControl_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)AxMapControl myAxMapControl = (AxMapControl)sender;IPoint myPoint = new PointClass();myPoint.X = e.mapX;myPoint.Y = e.mapY;myAxMapControl.CenterAt(myPoint);myAxMapControl.ActiveView.Refresh();/比较记录层和当前层是否一致private bool CompareLayers(System.Collections.Generic.Dictionary pLayerLog, IMap pMap)/先判断数量if (pLayerLog.Count != pMap.LayerCount)return false;/再判断对象是否一致，包括顺序for (int i = 0; i pMap.LayerCount; i+)ILayer myLogLayer = null;/如果找不到指定位置的层对象if (!pLayerLog.TryGetValue(i,out myLogLayer)return false;else/如果找到，就判断层引用是否指向的同一对象if (myLogLayer != pMap.get_Layer(i)return false;return true;/把层记录到层记录中，顺序好主地图顺序一致private void LogLayers(System.Collections.Generic.Dictionary pLayerLog, IMap pMap)pLayerLog .Clear ();for (int i = 0; i pMap.LayerCount; i+)pLayerLog.Add(i, pMap.get_Layer(i);/this._axMapControlEagle中的事件/鹰眼互动/鼠标在鹰眼上按下触发private void axMapControl2_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)this._smallViewerMouseDownPt = new PointClass();this._smallViewerMouseDownPt.PutCoords(e.mapX, e.mapY);this._mapControlMain.CenterAt(_smallViewerMouseDownPt);this._isTrackingSmallViewer = true;if (this._smallViewerEnvelope = null)this._smallViewerEnvelope = new MoveEnvelopeFeedbackClass();this._smallViewerEnvelope.Display = this._mapControlEagle.ActiveView.ScreenDisplay;this._smallViewerEnvelope.Symbol = (ISymbol)this._fillSymbol;this._smallViewerEnvelope.Start(_envelope, this._smallViewerMouseDownPt);/鼠标移动触发private void axMapControl2_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)if (this._isTrackingSmallViewer)this._moveCount+;if (this._moveCount % 5 = 0)this._mapControlEagle.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewForeground, null, null);this._smallViewerMouseDownPt.PutCoords(e.mapX, e.mapY);this._smallViewerEnvelope.MoveTo(this._smallViewerMouseDownPt);/鼠标按键弹起触发private void axMapControl2_OnMouseUp(object sender, IMapControlEvents2_OnMouseUpEvent e)if (this._smallViewerEnvelope != null)this._envelope =this._smallViewerEnvelope.Stop();this._mapControlMain.Extent = _envelope;this._isTrackingSmallViewer = false;C#制作鹰眼全过程（带注释）axMapControl1是主控件，axMapControl2是鹰眼控件要看清楚事件响应1.鹰眼地图资源载入private void axMapControl1_OnMapReplaced(object sender, IMapControlEvents2_OnMapReplacedEvent e)/当主地图显示控件的地图更换时，鹰眼中的地图也跟随更换axMapControl2.LoadMxFile(axMapControl1.DocumentFilename);axMapControl2.Extent = axMapControl2.FullExtent;2.绘制鹰眼矩形框private void axMapControl1_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)/ 得到新范围IEnvelope pEnv = (IEnvelope)e.newEnvelope;IGraphicsContainer pGra = axMapControl2.Map as IGraphicsContainer;IActiveView pAv = pGra as IActiveView;/在绘制前，清除axMapControl2中的任何图形元素pGra.DeleteAllElements();IRectangleElement pRectangleEle = new RectangleElementClass();IElement pEle = pRectangleEle as IElement;pEle.Geometry = pEnv;/设置鹰眼图中的红线框IRgbColor pColor = new RgbColorClass();pColor.Red = 255;pColor.Green = 0;pColor.Blue = 0;pColor.Transparency = 255;/产生一个线符号