public IArrowMarkerSymbol CreateArrowMarkerSymbol(IRgbColor color = null,
double length = 5,
int angle = 90,
double width = 1)
{
IArrowMarkerSymbol arrowMarkerSymbol = new ArrowMarkerSymbol();
arrowMarkerSymbol.Angle = angle;
arrowMarkerSymbol.Style = esriArrowMarkerStyle.esriAMSPlain;
if (color == null)
{
color = getRGB(50, 96, 220) as IRgbColor;
}
arrowMarkerSymbol.Color = color;
arrowMarkerSymbol.Width = width;
arrowMarkerSymbol.Length = length;
return(arrowMarkerSymbol);
}
/// <summary>
/// 带箭头的线段
/// </summary>
/// <param name="start"></param>
/// <param name="end"></param>
/// <param name="fillColor"></param>
public static void TrackLine(IPoint start, IPoint end, Color fillColor)
{
//将线段打断生成两条线段 以实现线段中间箭头显示
IPoint middle = new PointClass();
middle.PutCoords((end.X + start.X) / 2, (end.Y + start.Y) / 2);
IActiveView pActiveView = Program.myMap.ActiveView;
IGraphicsContainer pGraphicsContainer = pActiveView.GraphicsContainer;
IPolyline pLine = new PolylineClass();
IPolyline pLine1 = new PolylineClass();
pLine.FromPoint = start;
pLine.ToPoint = middle;
pLine1.FromPoint = middle;
pLine1.ToPoint = end;
pLine.Project(pActiveView.FocusMap.SpatialReference);
pLine1.Project(pActiveView.FocusMap.SpatialReference);
ICartographicLineSymbol pCartoLineSymbol = new CartographicLineSymbol();
pCartoLineSymbol.Cap = esriLineCapStyle.esriLCSRound;
ILineProperties pLineProp = pCartoLineSymbol as ILineProperties;
pLineProp.DecorationOnTop = true;
ILineDecoration pLineDecoration = new LineDecoration();
ISimpleLineDecorationElement pSimpleLineDecoElem = new SimpleLineDecorationElement();
pSimpleLineDecoElem.AddPosition(1);
IArrowMarkerSymbol pArrowMarkerSym = new ArrowMarkerSymbol();
pArrowMarkerSym.Size = 12;
pArrowMarkerSym.Color = GetColor(fillColor.R, fillColor.G, fillColor.B);
pSimpleLineDecoElem.MarkerSymbol = pArrowMarkerSym as IMarkerSymbol;
pLineDecoration.AddElement(pSimpleLineDecoElem as ILineDecorationElement);
pLineProp.LineDecoration = pLineDecoration;
ILineSymbol pLineSymbol = pCartoLineSymbol as ILineSymbol;
pLineSymbol.Color = GetColor(fillColor.R, fillColor.G, fillColor.B);;
pLineSymbol.Width = 2;
ILineElement pLineElem = new LineElementClass();
ILineElement pLineElem1 = new LineElementClass();
pLineElem.Symbol = pLineSymbol;
pLineElem1.Symbol = pLineSymbol;
IElement pElem = pLineElem as IElement;
IElement pElem1 = pLineElem1 as IElement;
pElem.Geometry = pLine;
pElem1.Geometry = pLine1;
pGraphicsContainer.AddElement(pElem, 0);
pGraphicsContainer.AddElement(pElem1, 0);
pActiveView.Refresh();
}
