ArcEngine中闪烁目标

最新推荐文章于 2021-09-16 17:55:13 发布

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本文介绍了一种在地图上高亮显示不同类型的地理要素的方法，包括线、面和点要素的闪烁效果实现。通过使用ArcGIS控件及接口，针对每种要素类型定义了特定的符号和闪烁逻辑。

//闪烁目标
        public static void FlashFeature(AxMapControl mapControl,IFeature iFeature, IMap iMap)
        {
            IActiveView iActiveView = iMap as IActiveView;
            if (iActiveView != null)
            {
                iActiveView.ScreenDisplay.StartDrawing(0, (short)esriScreenCache.esriNoScreenCache);
                //根据几何类型调用不同的过程
                switch (iFeature.Shape.GeometryType)
                {
                    case esriGeometryType.esriGeometryPolyline:
                        FlashLine(mapControl, iActiveView.ScreenDisplay, iFeature.Shape);
                        break;
                    case esriGeometryType.esriGeometryPolygon:
                        FlashPolygon(mapControl, iActiveView.ScreenDisplay, iFeature.Shape);
                        break;
                    case esriGeometryType.esriGeometryPoint:
                        FlashPoint(mapControl, iActiveView.ScreenDisplay, iFeature.Shape);
                        break;
                    default:
                        break;
                }
                iActiveView.ScreenDisplay.FinishDrawing();
            }
        }

        //闪烁线
        static void FlashLine(AxMapControl mapControl,IScreenDisplay iScreenDisplay,IGeometry iGeometry)
        {
            ISimpleLineSymbol iLineSymbol;
            ISymbol iSymbol;
            IRgbColor iRgbColor;

            iLineSymbol = new SimpleLineSymbol();
            iLineSymbol.Width = 4;
            iRgbColor = new RgbColor();
            iRgbColor.Red = 255;
            iLineSymbol.Color = iRgbColor;
            iSymbol = (ISymbol)iLineSymbol;
            iSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
            mapControl.FlashShape(iGeometry, 3, 200, iSymbol);
        }

        //闪烁面
        static void FlashPolygon(AxMapControl mapControl, IScreenDisplay iScreenDisplay, IGeometry iGeometry)
        {
            ISimpleFillSymbol iFillSymbol;
            ISymbol iSymbol;
            IRgbColor iRgbColor;

            iFillSymbol = new SimpleFillSymbol();
            iFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
            iFillSymbol.Outline.Width = 12;

            iRgbColor = new RgbColor();
            iRgbColor.RGB = System.Drawing.Color.FromArgb(100, 180, 180).ToArgb();
            iFillSymbol.Color = iRgbColor;

            iSymbol = (ISymbol)iFillSymbol;
            iSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
            iScreenDisplay.SetSymbol(iSymbol);
            mapControl.FlashShape(iGeometry, 3, 200, iSymbol);
        }

        //闪烁点
        static void FlashPoint(AxMapControl mapControl, IScreenDisplay iScreenDisplay, IGeometry iGeometry)
        {
            ISimpleMarkerSymbol iMarkerSymbol;
            ISymbol iSymbol;
            IRgbColor iRgbColor;

            iMarkerSymbol = new SimpleMarkerSymbol();
            iMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSCircle;
            iRgbColor = new RgbColor();
            iRgbColor.RGB = System.Drawing.Color.FromArgb(0, 0, 0).ToArgb();
            iMarkerSymbol.Color = iRgbColor;
            iSymbol = (ISymbol)iMarkerSymbol;
            iSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
            mapControl.FlashShape(iGeometry, 3, 200, iSymbol);
        }