//采用简单填充符号绘制矩形
private static void DrawRectangleBySimpleFill(Graphics g, moRectangle extent, double mapScale, double dpm,
double mpu, moRectangle rectangle, moSimpleFillSymbol symbol)
{
double sOffsetX = extent.MinX, sOffsetY = extent.MaxY; //获取投影坐标系相对屏幕坐标系的平移量
//（1）转换为屏幕坐标并生成矩形
Point sTopLeftPoint = new Point(), sBottomRightPoint = new Point();
sTopLeftPoint.X = (Int32)((rectangle.MinX - sOffsetX) * mpu / mapScale * dpm);
sTopLeftPoint.Y = (Int32)((sOffsetY - rectangle.MaxY) * mpu / mapScale * dpm);
sBottomRightPoint.X = (Int32)((rectangle.MaxX - sOffsetX) * mpu / mapScale * dpm);
sBottomRightPoint.Y = (Int32)((sOffsetY - rectangle.MinY) * mpu / mapScale * dpm);
Int32 sWidth = sBottomRightPoint.X - sTopLeftPoint.X;
Int32 sHeight = sBottomRightPoint.Y - sTopLeftPoint.Y;
Rectangle sRect = new Rectangle(sTopLeftPoint.X, sTopLeftPoint.Y, sWidth, sHeight);
//（2）填充
if (symbol.Color != Color.Transparent)
{
SolidBrush sBrush = new SolidBrush(symbol.Color);
g.FillRectangle(sBrush, sRect);
sBrush.Dispose();
}
//（3）绘制边界
if (symbol.Outline.SymbolType == moSymbolTypeConstant.SimpleLineSymbol)
{
moSimpleLineSymbol sOutline = symbol.Outline;
if (sOutline.Visible == true)
{
Pen sPen = new Pen(sOutline.Color, (float)(sOutline.Size / 1000 * dpm));
sPen.DashStyle = (DashStyle)sOutline.Style;
g.DrawRectangle(sPen, sRect);
sPen.Dispose();
}
}
}
//初始化符号
private void InitializeSymbols()
{
//选择点符号
mSelectedPointSymbol = new moSimpleMarkerSymbol();
mSelectedPointSymbol.Color = _SelectionColor;
mSelectedPointSymbol.Size = 3;
//选择线符号
mSelectedLineSymbol = new moSimpleLineSymbol();
mSelectedLineSymbol.Color = _SelectionColor;
mSelectedLineSymbol.Size = 3000 / mMapDrawingReference.dpm;
//选择面符号
mSelectedFillSymbol = new moSimpleFillSymbol();
mSelectedFillSymbol.Color = Color.Transparent;
mSelectedFillSymbol.Outline.Color = _SelectionColor;
mSelectedFillSymbol.Outline.Size = 3000 / mMapDrawingReference.dpm;
//闪烁点符号
mFlashPointSymbol = new moSimpleMarkerSymbol();
mFlashPointSymbol.Color = _FlashColor;
mFlashPointSymbol.Style = moSimpleMarkerSymbolStyleConstant.SolidCircle;
mFlashPointSymbol.Size = 3;
//闪烁线符号
mFlashLineSymbol = new moSimpleLineSymbol();
mFlashLineSymbol.Color = _FlashColor;
mFlashLineSymbol.Size = 1.5;
//闪烁面符号
mFlashFillSymbol = new moSimpleFillSymbol();
mFlashFillSymbol.Color = _FlashColor;
mFlashFillSymbol.Outline.Color = Color.Black;
mFlashFillSymbol.Outline.Size = 0.35;
}
//采用简单线符号绘制简单折线
private static void DrawPolylineBySimpleLine(Graphics g, moRectangle extent, double mapScale, double dpm,
double mpu, moPoints points, moSimpleLineSymbol symbol)
{
double sOffsetX = extent.MinX, sOffsetY = extent.MaxY; //获取投影坐标系相对屏幕坐标系的平移量
//（1）转换为屏幕坐标
GraphicsPath sGraphicPath = new GraphicsPath(); //用于屏幕绘制
Int32 sPointCount = points.Count; //顶点数目
PointF[] sScreenPoints = new PointF[sPointCount];
for (Int32 j = 0; j <= sPointCount - 1; j++)
{
PointF sScreenPoint = new PointF();
moPoint sCurPoint = points.GetItem(j);
sScreenPoint.X = (float)((sCurPoint.X - sOffsetX) * mpu / mapScale * dpm);
sScreenPoint.Y = (float)((sOffsetY - sCurPoint.Y) * mpu / mapScale * dpm);
sScreenPoints[j] = sScreenPoint;
}
sGraphicPath.AddLines(sScreenPoints);
//（2）绘制
Pen sPen = new Pen(symbol.Color, (float)(symbol.Size / 1000 * dpm));
sPen.DashStyle = (DashStyle)symbol.Style;
g.DrawPath(sPen, sGraphicPath);
sPen.Dispose();
}
/// <summary>
/// 为所有符号生成渐变色
/// </summary>
/// <param name="startColor"></param>
/// <param name="endColor"></param>
public void RampColor(Color startColor, Color endColor)
{
Int32 sBreakCount = _BreakValues.Count;
if (sBreakCount <= 0)
{
return;
}
Int32 A1 = startColor.A, R1 = startColor.R, G1 = startColor.G, B1 = startColor.B;
Int32 A2 = endColor.A, R2 = endColor.R, G2 = endColor.G, B2 = endColor.B;
Int32 A, R, G, B;
double H, S, V;
Color[] sColors = new Color[sBreakCount];
if (sBreakCount == 1)
{
sColors[0] = startColor;
}
else
{
//将起始和终止颜色转换为HSV
double[] sStartHSV = RGBToHSV(startColor.R, startColor.G, startColor.B);
double[] sEndHSV = RGBToHSV(endColor.R, endColor.G, endColor.B);
sColors[0] = startColor;
sColors[sBreakCount - 1] = endColor;
for (Int32 i = 1; i <= sBreakCount - 2; i++)
{
H = sStartHSV[0] + i * (sEndHSV[0] - sStartHSV[0]) / sBreakCount;
S = sStartHSV[1] + i * (sEndHSV[1] - sStartHSV[1]) / sBreakCount;
V = sStartHSV[2] + i * (sEndHSV[2] - sStartHSV[2]) / sBreakCount;
byte[] sRGB = HSVToRGB(H, S, V);
A = A1 + i * (A2 - A1) / sBreakCount;
R = sRGB[0];
G = sRGB[1];
B = sRGB[2];
sColors[i] = Color.FromArgb(A, R, G, B);
}
}
for (Int32 i = 0; i <= sBreakCount - 1; i++)
{
if (_Symbols[i] != null)
{
if (_Symbols[i].SymbolType == moSymbolTypeConstant.SimpleMarkerSymbol)
{
moSimpleMarkerSymbol sSymbol = (moSimpleMarkerSymbol)_Symbols[i];
sSymbol.Color = sColors[i];
}
else if (_Symbols[i].SymbolType == moSymbolTypeConstant.SimpleLineSymbol)
{
moSimpleLineSymbol sSymbol = (moSimpleLineSymbol)_Symbols[i];
sSymbol.Color = sColors[i];
}
else if (_Symbols[i].SymbolType == moSymbolTypeConstant.SimpleFillSymbol)
{
moSimpleFillSymbol sSymbol = (moSimpleFillSymbol)_Symbols[i];
sSymbol.Color = sColors[i];
}
}
}
}
//绘制线段
internal static void DrawLine(Graphics g, moRectangle extent, double mapScale, double dpm, double mpu, moPoint point1, moPoint point2, moSymbol symbol)
{
if (symbol.SymbolType == moSymbolTypeConstant.SimpleLineSymbol)
{
moSimpleLineSymbol sSymbol = (moSimpleLineSymbol)symbol;
if (sSymbol.Visible == true)
{
DrawLineBySimpleLine(g, extent, mapScale, dpm, mpu, point1, point2, sSymbol);
}
}
}
/// <summary>
/// 复制
/// </summary>
public override moSymbol Clone()
{
moSimpleLineSymbol sSymbol = new moSimpleLineSymbol();
sSymbol._Label = _Label;
sSymbol._Visible = _Visible;
sSymbol._Style = _Style;
sSymbol._Color = _Color;
sSymbol._Size = _Size;
return(sSymbol);
}
//采用简单填充符号绘制复合多边形
private static void DrawMultiPolygonBySimpleFill(Graphics g, moRectangle extent, double mapScale, double dpm,
double mpu, moMultiPolygon multiPolygon, moSimpleFillSymbol symbol)
{
double sOffsetX = extent.MinX, sOffsetY = extent.MaxY; //获取投影坐标系相对屏幕坐标系的平移量
//（1）转换为屏幕坐标
Int32 sPartCount = multiPolygon.Parts.Count; //简单多边形的数目
GraphicsPath sGraphicPath = new GraphicsPath(); //定义复合多边形，用于屏幕绘制
for (Int32 i = 0; i <= sPartCount - 1; i++)
{
Int32 sPointCount = multiPolygon.Parts.GetItem(i).Count; //当前简单多边形的顶点数目
PointF[] sScreenPoints = new PointF[sPointCount];
for (Int32 j = 0; j <= sPointCount - 1; j++)
{
PointF sScreenPoint = new PointF();
moPoint sCurPoint = multiPolygon.Parts.GetItem(i).GetItem(j);
sScreenPoint.X = (float)((sCurPoint.X - sOffsetX) * mpu / mapScale * dpm);
sScreenPoint.Y = (float)((sOffsetY - sCurPoint.Y) * mpu / mapScale * dpm);
sScreenPoints[j] = sScreenPoint;
}
sGraphicPath.AddPolygon(sScreenPoints);
}
//（2）填充
SolidBrush sBrush = new SolidBrush(symbol.Color);
g.FillPath(sBrush, sGraphicPath);
sBrush.Dispose();
//（3）绘制边界
if (symbol.Outline.SymbolType == moSymbolTypeConstant.SimpleLineSymbol)
{
moSimpleLineSymbol sOutline = symbol.Outline;
if (sOutline.Visible == true)
{
Pen sPen = new Pen(sOutline.Color, (float)(sOutline.Size / 1000 * dpm));
sPen.DashStyle = (DashStyle)sOutline.Style;
g.DrawPath(sPen, sGraphicPath);
sPen.Dispose();
}
}
}
//要素的符号是否可见
private bool IsFeatureSymbolVisible(moFeature feature)
{
moSymbol sSymbol = feature.Symbol;
if (sSymbol.SymbolType == moSymbolTypeConstant.SimpleMarkerSymbol)
{
moSimpleMarkerSymbol sMarkerSymbol = (moSimpleMarkerSymbol)sSymbol;
return(sMarkerSymbol.Visible);
}
else if (sSymbol.SymbolType == moSymbolTypeConstant.SimpleLineSymbol)
{
moSimpleLineSymbol sLineSymbol = (moSimpleLineSymbol)sSymbol;
return(sLineSymbol.Visible);
}
else if (sSymbol.SymbolType == moSymbolTypeConstant.SimpleFillSymbol)
{
moSimpleFillSymbol sFillSymbol = (moSimpleFillSymbol)sSymbol;
return(sFillSymbol.Visible);
}
else
{
throw new Exception("Invalid symbol type!");
}
}
//采用简单线符号绘制线段
private static void DrawLineBySimpleLine(Graphics g, moRectangle extent, double mapScale, double dpm,
double mpu, moPoint point1, moPoint point2, moSimpleLineSymbol symbol)
{
double sOffsetX = extent.MinX, sOffsetY = extent.MaxY; //获取投影坐标系相对屏幕坐标系的平移量
//（1）转换为屏幕坐标
PointF sScreenPoint1 = new PointF();
PointF sScreenPoint2 = new PointF();
sScreenPoint1.X = (float)((point1.X - sOffsetX) * mpu / mapScale * dpm);
sScreenPoint1.Y = (float)((sOffsetY - point1.Y) * mpu / mapScale * dpm);
sScreenPoint2.X = (float)((point2.X - sOffsetX) * mpu / mapScale * dpm);
sScreenPoint2.Y = (float)((sOffsetY - point2.Y) * mpu / mapScale * dpm);
//（2）绘制
Pen sPen = new Pen(symbol.Color, (float)(symbol.Size / 1000 * dpm));
sPen.DashStyle = (DashStyle)symbol.Style;
g.DrawLine(sPen, sScreenPoint1, sScreenPoint2);
sPen.Dispose();
}
//初始化边界符号
private void InitializeOutline()
{
_Outline = new moSimpleLineSymbol();
_Outline.Color = Color.DarkGray;
}