AE中閃爍要素的方兩種方法

 

1.利用IMapControl3::FlashShape 方法

 

調用如下:

            ISymbol symbol = CreateSimpleSymbol(featuer.Shape.GeometryType);
            this.m_mapControl.FlashShape(featuer.Shape, 3, 150, symbol);

2.使用IScreenDisplay接口的 DrawPoint  DrawMultipoint DrawPolyline DrawPolygon等方法

 

        /// <summary>
        /// 閃爍指定要素IGeometry
        /// </summary>
        /// <param name="geometry">要素</param>
        /// <param name="flashCount">閃爍次數</param>
        /// <param name="interval">每次閃爍的時間</param>
        private void FlashGeometry(IGeometry geometry, int flashCount, int interval)
        {
            IScreenDisplay display = m_activeView.ScreenDisplay;
            ISymbol symbol = CommonClass.CreateSimpleSymbol(geometry.GeometryType);
            display.StartDrawing(0, (short)esriScreenCache.esriNoScreenCache); display.SetSymbol(symbol);
            for (int i = 0; i < flashCount; i++)
            {
                switch (geometry.GeometryType)
                {
                    case esriGeometryType.esriGeometryPoint:
                        display.DrawPoint(geometry);
                        break;
                    case esriGeometryType.esriGeometryMultipoint:
                        display.DrawMultipoint(geometry);
                        break;
                    case esriGeometryType.esriGeometryPolyline:
                        display.DrawPolyline(geometry);
                        break;
                    case esriGeometryType.esriGeometryPolygon:
                        display.DrawPolygon(geometry);
                        break;
                }
                System.Threading.Thread.Sleep(interval);
            }
            display.FinishDrawing();
        }

 

注:兩個地方都用到了一個創建符號的方法

        /// <summary>
        /// 根據幾何類型創建閃爍符號
        /// </summary>
        /// <param name="geometryType">要素幾何類型</param>
        /// <returns>ISymbol</returns>
        private ISymbol CreateSimpleSymbol(esriGeometryType geometryType)
        {
            ISymbol symbol = null;
            switch (geometryType)
            {
                case esriGeometryType.esriGeometryPoint:
                case esriGeometryType.esriGeometryMultipoint:
                    ISimpleMarkerSymbol markerSymbol = new SimpleMarkerSymbolClass();
                    markerSymbol.Color = CommonClass.getRGB(255, 128, 128);
                    markerSymbol.Size = 2;
                    symbol = markerSymbol as ISymbol;
                    break;
                case esriGeometryType.esriGeometryPolyline:
                case esriGeometryType.esriGeometryPath:
                    ISimpleLineSymbol lineSymbol = new SimpleLineSymbolClass();
                    lineSymbol.Color = CommonClass.getRGB(255, 128, 128);
                    lineSymbol.Width = 4;
                    symbol = lineSymbol as ISymbol;
                    break;
                case esriGeometryType.esriGeometryPolygon:
                case esriGeometryType.esriGeometryRing:
                    ISimpleFillSymbol fillSymbol = new SimpleFillSymbolClass();
                    fillSymbol.Color = CommonClass.getRGB(255, 128, 128);
                    symbol = fillSymbol as ISymbol;
                    break;
            }
            symbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen;
            return symbol;
        }