Package org.pajes.html.tree

Used to construct an HTML frameset containing a Windows Explorer-like tree display.

See:
Description

Class Summary

TreeFactory	Factory to produce TreePaje instances.
TreeImage	Handles the return of the images used in the tree display.
TreePaje	Creates a frame set containing a client-side tree control.
TreeScript	Handles the return of the JavaScript source file used to construct and display the tree.
TreeStyleSheet	Handles the return of the default style sheet used to format the tree.

Exception Summary

TreeException

Thrown when a run-time exception relating to the construction of an HTML tag occurs.

Package org.pajes.html.tree Description

Used to construct an HTML frameset containing a Windows Explorer-like tree display. The following is an example of how a tree display servlet can be constructed:

    import org.pajes.html.tree.TreePaje;
    import org.pajes.html.tree.TreeFactory;
    import org.pajes.servlet.PajeServlet;
    import java.io.IOException;
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;

    public class Tree extends PajeServlet {
        private TreeFactory factory;

        protected void doGet(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException {
            // Create a tree document
            TreePaje      doc = (TreePaje)this.factory.create(request);

            // Define the root node (everything is based on the root node)
            TreePaje.Node root = doc.setRootNode("Test", null, true);

            // Create two second level nodes that do nothing but open and close
            TreePaje.Node level1 = doc.makeNode("Level1", "Level 1", null, false);
            TreePaje.Node level2 = doc.makeNode("Level2", "Level 2", null, false);

            // Create a node that has an URL (it does something when you
            // click on it apart from opening/closong any children)
            TreePaje.Node list = doc.makeNode("Persons", "Persons", "some URL", false);

            // Add the children to the root node
            root.addChild(level1);
            root.addChild(level2);

            // Add the actual thing to level 1
            level1.addChild(list);

            // Set the tree and page titles
            doc.setTreeTitle("Tree");
            doc.getHead().setPageTitle("Tree");

            // Send the result back to the browser
            doc.write(this.getServletContext(), request, response);
        }

        public void init() throws ServletException {
            try {
                // Initialise the factory that produces tree framesets
                this.factory = new TreeFactory(this.getServletContext());
            }
            catch (Exception e) {
                throw new ServletException(e);
            }
        }
    }