DotNet 4.8.1 build of DotNetBar

PROMS/DotNetBar Source Code/TreeGX/Layout/NodeTreeLayout.cs

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+using System.Collections;
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace DevComponents.Tree.Layout
+{
+	/// <summary>
+	/// Summary description for NodeTreeLayout.
+	/// </summary>
+	internal class NodeTreeLayout:NodeLayout
+	{
+		//private bool m_LayoutPerformed=false;
+
+		public NodeTreeLayout(TreeGX treeControl, Rectangle clientArea):base(treeControl,clientArea)
+		{
+			ExpandPartSize=new Size(9,9);
+		}
+
+		public override void PerformLayout()
+		{
+			this.PrepareStyles();
+
+			// Get default Columns
+			ArrayList defaultColInfoList=this.GetDefaultColumnInfo();
+
+			Graphics graphics=this.GetGraphics();
+			try
+			{
+				// Loop through each top-level node
+				Node[] topLevelNodes=this.GetTopLevelNodes();
+				NodeLayoutContextInfo layoutInfo=GetDefaultNodeLayoutContextInfo(graphics);
+
+				foreach(Node childNode in topLevelNodes)
+				{
+					layoutInfo.ContextNode=childNode;
+					ProcessNode(layoutInfo);
+				}
+			}
+			finally
+			{
+				if(this.DisposeGraphics)
+					graphics.Dispose();
+			}
+		}
+
+		#region Node routines
+		private void ProcessNode(NodeLayoutContextInfo layoutInfo)
+		{
+			Node node=layoutInfo.ContextNode;
+			if(node.SizeChanged)
+			{
+				// Calculate size of the node itself...
+				LayoutNode(layoutInfo);
+
+				// Calculate size and location of node column header if any
+//				if(node.NodesColumnHeaderVisible)
+//				{
+//					layoutInfo.Left+=this.NodeLevelOffset;
+//					LayoutColumnHeader(layoutInfo);
+//					layoutInfo.Left-=this.NodeLevelOffset;
+//				}
+			}
+			else if(node.BoundsRelative.Top!=layoutInfo.Top)
+			{
+				// Adjust top position
+				node.SetBounds(new Rectangle(node.BoundsRelative.X,layoutInfo.Top,node.BoundsRelative.Width,node.BoundsRelative.Height));
+				foreach(Cell c in node.Cells)
+					c.SetBounds(new Rectangle(c.BoundsRelative.X,layoutInfo.Top,c.BoundsRelative.Width,c.BoundsRelative.Height));
+			}
+
+			// Need to set the Top position properly
+			layoutInfo.Top+=(node.BoundsRelative.Height+this.NodeVerticalSpacing);
+//			if(node.Expanded && node.NodesColumnHeaderVisible && node.NodesColumns.Count>0)
+//				layoutInfo.Top+=node.ColumnHeaderHeight;
+			
+			if(node.Expanded)
+			{
+				int originalLevelOffset=layoutInfo.Left;
+				layoutInfo.Left+=this.NodeLevelOffset;
+				
+				ArrayList parentColumns=layoutInfo.ChildColumns;
+				ArrayList childColumns=GetNodeColumnInfo(node);
+
+				foreach(Node childNode in node.Nodes)
+				{
+					layoutInfo.ContextNode=childNode;
+					layoutInfo.ChildColumns=childColumns;
+					ProcessNode(layoutInfo);
+				}
+				layoutInfo.ChildColumns=parentColumns;
+
+				layoutInfo.ContextNode=node;
+				layoutInfo.Left=originalLevelOffset;
+			}
+		}
+
+		/// <summary>
+		/// Returns true if expand part space should be accounted for even if they expand part is not visible or need to be displayed. Default value is false.
+		/// </summary>
+		protected override bool ReserveExpandPartSpace
+		{
+			get
+			{
+				return true;
+			}
+		}
+
+		/// <summary>
+		/// Gets whether the expand part of the node +/- is aligned to the left of the node in left-to-right layout.
+		/// </summary>
+		/// <param name="node">Node to get expand part alignment for</param>
+		/// <returns>true if node expand part is aligned to the left in left-to-right layout.</returns>
+		private bool ExpandPartAlignedNear(Node node)
+		{
+			return true; // If changed LayoutExpandPart needs to be updated as well
+		}
+
+//		private NodeCollection GetTopLevelNodes()
+//		{
+//			return m_Tree.Nodes;
+//		}
+
+		private int NodeLevelOffset
+		{
+			get {return 10;}
+		}
+
+		#endregion
+
+		
+	}
+}