DotNet 4.8.1 build of DotNetBar

PROMS/DotNetBar Source Code/TreeGX/MapConnectorDisplay.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+
+namespace DevComponents.Tree
+{
+	/// <summary>
+	/// Represents the connector display for map type.
+	/// </summary>
+	public class MapConnectorDisplay:NodeConnectorDisplay
+	{
+		private int m_RootNodeConnectorWidth=4;
+		public MapConnectorDisplay()
+		{
+		}
+
+		/// <summary>
+		/// Draws connector line between two nodes.
+		/// </summary>
+		/// <param name="info">Connector context information.</param>
+		public override void DrawConnector(NodeConnectorDisplayInfo info)
+		{
+			if(info.LineColor.IsEmpty && info.FillColor.IsEmpty)
+				return;
+
+			DrawCurveConnector(info);
+		}
+
+		private void DrawCurveConnector(NodeConnectorDisplayInfo info)
+		{
+			Point pStart=this.GetStartPoint(info);
+			Point pEnd=this.GetEndPoint(info);
+
+			pStart.Offset(info.Offset.X,info.Offset.Y);
+			pEnd.Offset(info.Offset.X,info.Offset.Y);
+
+			// Determine whether curve can be drawn
+			if(Math.Abs(pStart.X-pEnd.X)<=6 || Math.Abs(pStart.Y-pEnd.Y)<=10)
+			{
+				using(Pen pen=this.GetCurvePen(info))
+				{
+					info.Graphics.DrawLine(pen,pStart,pEnd);
+				}
+			}
+			else
+			{
+				// Create two points in between the start and end point
+				Point[] p=new Point[4];
+				int xMulti=1, yMulti=1;
+				
+				// used for direction control
+				if(pStart.X>pEnd.X)
+					xMulti=-1;
+				if(pStart.Y>pEnd.Y)
+					yMulti=-1;
+				
+                p[1].X=pStart.X+(int)(Math.Abs(pStart.X-pEnd.X)*.15f*xMulti);
+				p[1].Y=pStart.Y+(int)(Math.Abs(pStart.Y-pEnd.Y)*.15f*yMulti);
+
+				p[2].X=pStart.X+(int)(Math.Abs(pStart.X-pEnd.X)*.5f*xMulti);
+				p[2].Y=pEnd.Y-(int)(yMulti*(Math.Abs(pStart.Y-pEnd.Y)*.15f));
+
+				p[0]=pStart;
+				p[3]=pEnd;
+
+				if(info.IsRootNode && m_RootNodeConnectorWidth>1)
+				{
+					GraphicsPath path=new GraphicsPath();
+					path.AddCurve(p,.5f);
+					path.AddLine(p[0].X,p[0].Y,p[0].X+m_RootNodeConnectorWidth*xMulti,p[0].Y);
+					p[0].X+=(m_RootNodeConnectorWidth*xMulti);
+					p[1].X+=(m_RootNodeConnectorWidth*xMulti);
+					p[2].X+=(m_RootNodeConnectorWidth*xMulti);
+					p[3].Y-=yMulti;
+					path.AddCurve(p,.5f);
+					path.AddLine(p[3].X,p[3].Y,p[3].X,p[3].Y+yMulti);
+					path.CloseAllFigures();
+					using(Brush brush=this.GetCurveBrush(info))
+					{
+						info.Graphics.FillPath(brush,path);
+					}
+				}
+				else
+				{
+					using(Pen pen=this.GetCurvePen(info))
+					{
+						info.Graphics.DrawCurve(pen,p,.5f);
+					}
+				}
+			}
+		}
+
+		private Pen GetCurvePen(NodeConnectorDisplayInfo info)
+		{
+			return new Pen(info.LineColor,1);
+		}
+
+		private Brush GetCurveBrush(NodeConnectorDisplayInfo info)
+		{
+			return new SolidBrush(info.LineColor);
+		}
+
+		private Point GetStartPoint(NodeConnectorDisplayInfo info)
+		{
+			Point p=Point.Empty;
+
+			if(info.IsRootNode)
+			{
+				int toMidPoint=info.ToNode.Bounds.Top+info.ToNode.Bounds.Height/2;
+				if(info.FromNode.Bounds.Top>toMidPoint)
+					p=new Point(info.FromNode.Bounds.Left+info.FromNode.Bounds.Width/2,info.FromNode.Bounds.Top);
+				else if(info.FromNode.Bounds.Bottom<toMidPoint)
+					p=new Point(info.FromNode.Bounds.Left+info.FromNode.Bounds.Width/2,info.FromNode.Bounds.Bottom-1);
+			}
+
+			if(p.IsEmpty)
+			{
+				// To element to the Left of from node
+				if(this.IsOnLeftSide(info.FromNode,info.ToNode))
+					p=new Point(info.FromNode.Bounds.Left,info.FromNode.Bounds.Top+info.FromNode.Bounds.Height/2);
+				else
+					p=new Point(info.FromNode.Bounds.Right,info.FromNode.Bounds.Top+info.FromNode.Bounds.Height/2);
+			}
+
+			return p;
+		}
+
+		private Point GetEndPoint(NodeConnectorDisplayInfo info)
+		{
+			// If to element is to the right of the from node and has left border end point is the vertical mid-point
+			// If to element is to the left of the from node and has right border end point is the vertical mid-point
+			// If there is no border end point is text bottom
+
+			Point p=Point.Empty;
+
+			if(this.IsOnLeftSide(info.FromNode,info.ToNode))
+			{
+				// To element is to the left of from node
+				Rectangle r=info.ToNode.Bounds;
+				if(info.StyleToNode==null || !info.StyleToNode.PaintRightBorder)
+					r=info.ToNode.Cells[0].TextContentBounds;
+
+				p=new Point(r.Right,r.Y+r.Height/2);
+			}
+			else
+			{
+				// To element to the right of from node
+				Rectangle r=info.ToNode.Bounds;
+				if(info.StyleToNode==null || !info.StyleToNode.PaintLeftBorder)
+					r=info.ToNode.Cells[0].TextContentBounds;
+				
+				p=new Point(r.X,r.Y+r.Height/2);
+			}
+
+			return p;
+		}
+
+		private bool IsOnLeftSide(Node source, Node target)
+		{
+			if((source.Bounds.Left+source.Bounds.Width/2)>target.Bounds.Left)
+				return true;
+			return false;
+		}
+	}
+}