Directed Tree Layout

The directed trees sample demonstrates the DirectedTreeLayoutManager layout management class in Essential Diagram.

The DirectedTreeLayoutManager implements a layout management solution for the diagrams which are composed of nodes forming a directed tree graph. It lets you orient the tree in any direction around the root node by specifying a suitable angle of rotation.

This sample also demonstrates a more conventional top-to-bottom, bottom-to-top, left-to-right and right-to-left tree layouts implemented using the DirectedTreeLayoutManager.

Features

• Horizontal Spacing - Sets the horizontal spacing between the adjacent nodes.
• Vertical Spacing - Sets the vertical spacing between the adjacent nodes.
• Top Margin - Sets the top margin of the layout manager.
• Left Margin - Sets the left margin of the layout manager.
• Different tree orientations that specifies how nodes are arranged.
• ToptoBottom - Places the parent nodes at the top and the child nodes are below the root node.
• BottomtoTop - Places the parent nodes at the bottom and the child nodes above the root node.
• LeftToRight - Places the parent nodes at the left and the child nodes on the right side of the root node.
• RightToLeft - Places the parent nodes at the right and the child nodes on the left side of the root node.
• RotationAngle - Sets the rotation angle for the layout manager.
• DirectedTreeLayoutManager supports two different type of LayoutType.
• Horizontal
• Waterfall
• AutoLayout - Updates the layout of the model, automatically.

To create the DirectedTreeLayoutManager with the tree rotation as "TopToBottom" (i.e.RotationAngle =0), horizontal and vertical spacing as 50 and 60 respectively, use the following code.

				DirectedTreeLayoutManager dtlm = new DirectedTreeLayoutManager(this.diagram1.Model, 0, 50, 60);
				//Sets the DirectedTreeLayoutManager as responsible for updating the layout of the diagram.
	            this.diagram1.LayoutManager = dtlm;
	            // Updates the layout of the nodes in the model.
	            this.diagram1.LayoutManager.UpdateLayout(null);