98 lines
2.3 KiB
C#
98 lines
2.3 KiB
C#
using System;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using DevComponents.Tree.Display;
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namespace DevComponents.Tree.Display
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{
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/// <summary>
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/// Represents the line connector display class.
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/// </summary>
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public class LineConnectorDisplay:NodeConnectorDisplay
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{
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/// <summary>
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/// Draws connector line between two nodes.
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/// </summary>
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/// <param name="info">Connector context information.</param>
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public override void DrawConnector(ConnectorRendererEventArgs info)
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{
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if(info.NodeConnector.LineColor.IsEmpty || info.NodeConnector.LineWidth<=0)
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return;
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DrawStarConnector(info);
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}
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private void DrawStarConnector(ConnectorRendererEventArgs info)
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{
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Point pStart=this.GetStartPoint(info);
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Point[] parr=this.GetEndPoint(info);
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Point pEnd=parr[0];
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Point pEndUnderLine=parr[1];
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if(info.ConnectorPoints==null)
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{
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// Determine whether curve can be drawn
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if(Math.Abs(pStart.X-pEnd.X)<=6 || Math.Abs(pStart.Y-pEnd.Y)<=10)
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{
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DrawLineConnector(info,pStart,pEnd,pEndUnderLine);
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}
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else
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{
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Point pBottom=new Point();
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Point pTop=new Point();
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if(pEnd.X<pStart.X)
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{
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pBottom.X=pStart.X-info.NodeConnector.LineWidth;
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pTop.X=pEnd.X+1;
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}
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else
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{
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pBottom.X=pStart.X+info.NodeConnector.LineWidth;
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pTop.X=pEnd.X-1;
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}
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pBottom.Y=pStart.Y;
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pTop.Y=pEnd.Y;
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GraphicsPath path=new GraphicsPath();
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path.AddLine(pStart,pBottom);
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path.AddLine(pBottom,pEnd);
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path.AddLine(pEnd,pTop);
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path.AddLine(pTop,pStart);
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path.CloseAllFigures();
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using(Brush brush=this.GetLineBrush(info))
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info.Graphics.FillPath(brush,path);
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}
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}
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else
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{
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ConnectorPointInfo pointInfo=GetConnectorPointInfo(info,pStart,pEnd);
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if(pointInfo.Points2==null)
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{
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using(Pen pen=this.GetLinePen(info))
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{
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info.Graphics.DrawLines(pen,pointInfo.Points1);
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}
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}
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else
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{
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using(GraphicsPath path=new GraphicsPath())
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{
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path.AddLines(pointInfo.Points1);
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path.AddLines(pointInfo.Points2);
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path.CloseAllFigures();
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using(Brush brush=this.GetLineBrush(info))
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{
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info.Graphics.FillPath(brush,path);
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}
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}
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}
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}
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DrawEndLine(info,pStart,pEnd,pEndUnderLine);
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}
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}
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}
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