public class SymbolHelper { // Methods public static IFillSymbol CreateFillSymbol(Color fillColor, Color outlineColor) { SimpleFillSymbolClass class2 = new SimpleFillSymbolClass(); class2.Style = esriSimpleFillStyle.esriSFSSolid; class2.Color = ColorHelper.CreateColor(fillColor); ISimpleLineSymbol symbol = new SimpleLineSymbolClass(); symbol.Style = esriSimpleLineStyle.esriSLSSolid; symbol.Color = ColorHelper.CreateColor(outlineColor); symbol.Width = 1.0; class2.Outline = symbol; return class2; } public static IFillSymbol CreateFillSymbol(Color fillColor, esriSimpleFillStyle eFillStyle, ISimpleLineSymbol aOutline) { SimpleFillSymbolClass class2 = new SimpleFillSymbolClass(); class2.Style = eFillStyle; class2.Color = ColorHelper.CreateColor(fillColor); class2.Outline = aOutline; return class2; } public static IFillSymbol CreateFillSymbol(Color fillColor, esriSimpleFillStyle eFillStyle, Color outlineColor, double outlineWidth, esriSimpleLineStyle outlineStyle) { SimpleFillSymbolClass class2 = new SimpleFillSymbolClass(); class2.Style = eFillStyle; class2.Color = ColorHelper.CreateColor(fillColor); ISimpleLineSymbol symbol = new SimpleLineSymbolClass(); symbol.Style = outlineStyle; symbol.Color = ColorHelper.CreateColor(outlineColor); symbol.Width = outlineWidth; class2.Outline = symbol; return class2; } public static IFontDisp CreateFont(string pFontName, float pSize) { StdFontClass class2 = new StdFontClass(); class2.Name = pFontName; class2.Size = Convert.ToDecimal(pSize); class2.Bold = false; class2.Italic = false; class2.Underline = false; class2.Strikethrough = false; return (class2 as IFontDisp); } public static IFontDisp CreateFont(string pFontName, float pSize, bool pBold, bool pItalic, bool pUnderline, bool pStroke) { StdFontClass class2 = new StdFontClass(); class2.Name = pFontName; class2.Size = Convert.ToDecimal(pSize); class2.Bold = pBold; class2.Italic = pItalic; class2.Underline = pUnderline; class2.Strikethrough = pStroke; return (class2 as IFontDisp); } private static IGeometry CreateGeometryFromSymbol(ISymbol sym, IEnvelope env) { IPoint point; if (sym is IMarkerSymbol) { IArea area = (IArea)env; return area.Centroid; } if ((sym is ILineSymbol) || (sym is ITextSymbol)) { IPolyline polyline = new PolylineClass(); point = new PointClass(); point.PutCoords(env.LowerLeft.X, (env.LowerLeft.Y + env.UpperRight.Y) / 2.0); polyline.FromPoint = point; point = new PointClass(); point.PutCoords(env.UpperRight.X, (env.LowerLeft.Y + env.UpperRight.Y) / 2.0); polyline.ToPoint = point; if (sym is ITextSymbol) { (sym as ITextSymbol).Text = "样本字符"; } return polyline; } if (sym is IFillSymbol) { IPolygon polygon = new PolygonClass(); IPointCollection points = (IPointCollection)polygon; point = new PointClass(); point.PutCoords(env.LowerLeft.X, env.LowerLeft.Y); points.AddPoints(1, ref point); point.PutCoords(env.UpperLeft.X, env.UpperLeft.Y); points.AddPoints(1, ref point); point.PutCoords(env.UpperRight.X, env.UpperRight.Y); points.AddPoints(1, ref point); point.PutCoords(env.LowerRight.X, env.LowerRight.Y); points.AddPoints(1, ref point); point.PutCoords(env.LowerLeft.X, env.LowerLeft.Y); points.AddPoints(1, ref point); return polygon; } return null; } public static ILineSymbol CreateLineDirectionSymbol() { ILineSymbol symbol = new CartographicLineSymbolClass(); symbol.Color = ColorHelper.CreateColor(0, 0, 200); LineDecorationClass class2 = new LineDecorationClass(); SimpleLineDecorationElementClass lineDecorationElement = new SimpleLineDecorationElementClass(); lineDecorationElement.AddPosition(0.3); lineDecorationElement.AddPosition(0.7); lineDecorationElement.PositionAsRatio = true; IMarkerSymbol symbol2 = (lineDecorationElement.MarkerSymbol as IClone).Clone() as IMarkerSymbol; symbol2.Size = 9.0; symbol2.Color = ColorHelper.CreateColor(0, 200, 0); lineDecorationElement.MarkerSymbol = symbol2; class2.AddElement(lineDecorationElement); (symbol as ILineProperties).LineDecoration = class2; return symbol; } public static ILineSymbol CreateSimpleLineSymbol(Color lineColor, double width) { SimpleLineSymbolClass class2 = new SimpleLineSymbolClass(); class2.Color = ColorHelper.CreateColor(lineColor); class2.Style = esriSimpleLineStyle.esriSLSSolid; class2.Width = Math.Abs(width); return class2; } public static ILineSymbol CreateSimpleLineSymbol(Color lineColor, double width, esriSimpleLineStyle eStyle) { SimpleLineSymbolClass class2 = new SimpleLineSymbolClass(); class2.Color = ColorHelper.CreateColor(lineColor); class2.Style = eStyle; class2.Width = Math.Abs(width); return class2; } public static IMarkerSymbol CreateSimpleMarkerSymbol(Color pColor, double pSize) { SimpleMarkerSymbolClass class2 = new SimpleMarkerSymbolClass(); class2.Color = ColorHelper.CreateColor(pColor); class2.Size = pSize; return class2; } public static ITextSymbol CreateTextSymbol(Color pColor, IFontDisp pFont, double pSize, string sText) { ITextSymbol symbol = new TextSymbolClass(); symbol.Color = ColorHelper.CreateColor(pColor); symbol.Font = pFont; symbol.Size = pSize; symbol.Text = sText; return symbol; } public static IFillSymbol CreateTransparentFillSymbol(ISimpleLineSymbol aOutline) { SimpleFillSymbolClass class2 = new SimpleFillSymbolClass(); class2.Style = esriSimpleFillStyle.esriSFSNull; class2.Outline = aOutline; return class2; } public static IFillSymbol CreateTransparentFillSymbol(Color outlineColor) { SimpleFillSymbolClass class2 = new SimpleFillSymbolClass(); class2.Style = esriSimpleFillStyle.esriSFSNull; ISimpleLineSymbol symbol = new SimpleLineSymbolClass(); symbol.Style = esriSimpleLineStyle.esriSLSSolid; symbol.Color = ColorHelper.CreateColor(outlineColor); symbol.Width = 1.0; class2.Outline = symbol; return class2; } public static Image StyleToImage(ISymbol sym) { return StyleToImage(sym, 0x10, 0x10); } public static Image StyleToImage(ISymbol sym, int width, int height) { if (sym == null) { return null; } try { Image image = new Bitmap(width, height); Graphics graphics = Graphics.FromImage(image); IntPtr hdc = graphics.GetHdc(); IEnvelope env = new EnvelopeClass(); env.XMin = 1.0; env.XMax = width - 1; env.YMin = 1.0; env.YMax = height - 1; IGeometry geometry = CreateGeometryFromSymbol(sym, env); if (geometry != null) { ITransformation transformation = DisplayHelper.CreateTransformationFromHDC(hdc, width, height); sym.SetupDC((int)hdc, transformation); sym.Draw(geometry); sym.ResetDC(); } graphics.ReleaseHdc(hdc); return image; } catch { return null; } } }
