闪烁选中的要素（Flash）

最新推荐文章于 2019-03-01 12:36:00 发布

lysc_forever

最新推荐文章于 2019-03-01 12:36:00 发布

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CC 4.0 BY-SA版权

文章标签： flash

本文链接：https://blog.youkuaiyun.com/lysc_forever/article/details/7705438

本文介绍了一种在地图应用中实现要素闪烁效果的方法。通过判断要素类型（点、线、面），使用不同颜色和样式来实现视觉上的闪烁效果。对于点要素采用圆形标记符号，线要素采用特殊线样式，面要素则填充特定颜色。

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/// <summary>
        /// 对所选择特征进行闪烁控制
        /// </summary>
        /// <param name="pFeature"></param>
        /// <param name="pMap"></param>
        public static void FlashFeature(IFeature pFeature, IMap pMap)
        {
            IActiveView pActiveView = pMap as IActiveView;
            pActiveView.ScreenDisplay.StartDrawing(0, -1);
            switch (pFeature.Shape.GeometryType)
            {
                case esriGeometryType.esriGeometryPolyline:
                    FlashPolyline(pActiveView.ScreenDisplay, pFeature.Shape);
                    break;
                case esriGeometryType.esriGeometryPolygon:
                    FlashPolygon(pActiveView.ScreenDisplay, pFeature.Shape);
                    break;
                case esriGeometryType.esriGeometryPoint:
                    FlashPoint(pActiveView.ScreenDisplay, pFeature.Shape);
                    break;

            }
            pActiveView.ScreenDisplay.FinishDrawing();
        }


 /// <summary>
        /// 闪烁点要素
        /// </summary>
        /// <param name="pDisplay"></param>
        /// <param name="pGeometry"></param>
        public static void FlashPoint(IScreenDisplay pDisplay, IGeometry pGeometry)
        {
            ISimpleMarkerSymbol pMarkerSymbol = new SimpleMarkerSymbolClass();
            pMarkerSymbol.Style. = esriSimpleMarkerStyle.esriSMSCircle;
            IRgbColor pRgbColor = new RgbColorClass();
            pRgbColor.Red = 150;
            pRgbColor.Green = 100;
            pRgbColor.Blue = 100;
            pMarkerSymbol.Color = pRgbColor as IColor;
            pMarkerSymbol.Outline = true;
            ISymbol pSymbol = pMarkerSymbol as ISymbol;
            pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
            pDisplay.SetSymbol(pSymbol);
            pDisplay.DrawPoint(pGeometry);
            Thread.Sleep(300);
            pDisplay.DrawPoint(pGeometry);
        }
      
        /// <summary>
        /// 闪烁线要素
        /// </summary>
        /// <param name="pDisplay"></param>
        /// <param name="pGeometry"></param>
        public static void FlashPolyline(IScreenDisplay pDisplay, IGeometry pGeometry)
        {
            ISimpleLineSymbol pLineSymbol = new SimpleLineSymbolClass();
            pLineSymbol.Width = 4;
            IRgbColor pRgbColor = new RgbColorClass();
            pRgbColor.Green = 100;
            pRgbColor.Red = 150;
            pRgbColor.Blue = 100;
            pLineSymbol.Color = pRgbColor as IColor;
            ISymbol pSymbol = pLineSymbol as ISymbol;
            pSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
            pDisplay.SetSymbol(pSymbol);
            pDisplay.DrawPolyline(pGeometry);
            Thread.Sleep(300);
            pDisplay.DrawPolyline(pGeometry);
        }
       
          /// <summary>
          /// 闪烁面要素
          /// </summary>
          /// <param name="pDisplay"></param>
          /// <param name="pGeometry"></param>
        public static void FlashPolygon(IScreenDisplay pDisplay, IGeometry pGeometry)
        {
            ISimpleFillSymbol pFillSymbol = new SimpleFillSymbolClass();
            IRgbColor pRgbColor = new RgbColorClass();
            pRgbColor.Red = 255;
            pRgbColor.Green = 0;
            pRgbColor.Blue = 0;
            pFillSymbol.Color = pRgbColor as IColor;
            ISymbol pSymbol = pFillSymbol as ISymbol;
            pDisplay.SetSymbol(pSymbol);
            pDisplay.DrawPolygon(pGeometry);
            Thread.Sleep(300);
            pDisplay.DrawPolygon(pGeometry);
        }