ArcEngine双向联动鹰眼图源码

#region 鹰眼图
        IElement pOverViewElement = null;//鹰眼图Element
        IEnvelope pCurrentEnveop = null;
        bool IsMove = false;
        private void axMapControl1_OnExtentUpdated(object sender, IMapControlEvents2_OnExtentUpdatedEvent e)
        {
            if (pOverViewElement != null)
            {
                upDataOverViewMap();
            }
        }
        private IElement InitOverViewMap()
        {
            if (axMapControl1.DocumentFilename == null) { Tools.ShowInfoWindow("当前未加载地图",1); return null; }
            axMapControl2.LoadMxFile(axMapControl1.DocumentFilename);
            axMapControl2.Extent = axMapControl2.FullExtent;
            axMapControl2.OnMouseMove += new IMapControlEvents2_Ax_OnMouseMoveEventHandler(axMapControl2_OnMouseMove);
            axMapControl2.OnMouseDown += new IMapControlEvents2_Ax_OnMouseDownEventHandler(axMapControl2_OnMouseDown);
            axMapControl2.OnMouseUp += new IMapControlEvents2_Ax_OnMouseUpEventHandler(axMapControl2_OnMouseUp);
            pCurrentEnveop = axMapControl1.Extent;
            IEnvelope pEnv = axMapControl1.Extent;
            pEnv.Expand(3, 3, true);
            axMapControl2.Extent = pEnv;
            IRgbColor pColor = new RgbColorClass();
            IRectangleElement pPolygonElement = new RectangleElementClass();

            ISimpleLineSymbol pLineSym = new SimpleLineSymbolClass();
            pColor.Red = 255;
            pColor.Green = 0;
            pColor.Blue = 0;
            pLineSym.Color = pColor;
            pLineSym.Width = 2;

            ISimpleFillSymbol pFillSym = new SimpleFillSymbolClass();
            pColor.Transparency = 0;
            pFillSym.Color = pColor;

            pFillSym.Outline = pLineSym;

            ((IFillShapeElement)pPolygonElement).Symbol = pFillSym;
            ((IElement)pPolygonElement).Geometry = axMapControl1.Extent;
            axMapControl2.ActiveView.GraphicsContainer.DeleteAllElements();
            axMapControl2.ActiveView.GraphicsContainer.AddElement((IElement)pPolygonElement, 0);
            axMapControl2.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
            return (IElement)pPolygonElement;
        }

        void axMapControl2_OnMouseUp(object sender, IMapControlEvents2_OnMouseUpEvent e)
        {
            IsMove = false;
            upDataMainMap();
        }

        void axMapControl2_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
        {
            IsMove = true;
        }

        void axMapControl2_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)
        {
            if (IsMove)
            {
                IPoint cPt = new PointClass();
                cPt.X = e.mapX; cPt.Y = e.mapY;
                pCurrentEnveop.CenterAt(cPt);
                pOverViewElement.Geometry = pCurrentEnveop;
                axMapControl2.ActiveView.GraphicsContainer.UpdateElement(pOverViewElement);
                axMapControl2.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
            }
        }
        private void upDataOverViewMap()
        {
            pCurrentEnveop = axMapControl1.Extent;
            IEnvelope pEnv = axMapControl1.Extent;
            pEnv.Expand(3, 3, true);
            axMapControl2.Extent = pEnv;
            pOverViewElement.Geometry = axMapControl1.Extent;
            axMapControl2.ActiveView.GraphicsContainer.UpdateElement(pOverViewElement);
            axMapControl2.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
        }
        private void upDataMainMap()
        {
            axMapControl1.Extent = pCurrentEnveop;
        }

        private void picture_CloseOverMap_Click(object sender, EventArgs e)
        {
            OverViewWindow.Visible = false;
            axMapControl2.ActiveView.GraphicsContainer.DeleteAllElements();
            pOverViewElement = null;//鹰眼图Element
            pCurrentEnveop = null;
        }

        private void btn_OverViewMap_Click(object sender, EventArgs e)
        {
            pOverViewElement = InitOverViewMap();
            if (pOverViewElement == null) return;
            OverViewWindow.Visible = true;
        }
        #endregion