/*
    * Copyright (c) 2003, the JUNG Project and the Regents of the University of
    * California All rights reserved.
    * 
    * This software is open-source under the BSD license; see either "license.txt"
    * or http://jung.sourceforge.net/license.txt for a description.
    * 
    */
   package edu.uci.ics.jung.samples;
  
  import java.awt.BorderLayout;
  import java.awt.Color;
  import java.awt.Container;
  import java.awt.Dimension;
  import java.awt.GridLayout;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import java.awt.event.ItemEvent;
  import java.awt.event.ItemListener;
  
  import javax.swing.BorderFactory;
  import javax.swing.JApplet;
  import javax.swing.JButton;
  import javax.swing.JComboBox;
  import javax.swing.JFrame;
  import javax.swing.JMenuBar;
  import javax.swing.JPanel;
  
  import edu.uci.ics.jung.algorithms.layout.FRLayout;
  import edu.uci.ics.jung.algorithms.layout.Layout;
  import edu.uci.ics.jung.graph.Graph;
  import edu.uci.ics.jung.graph.util.TestGraphs;
  import edu.uci.ics.jung.visualization.DefaultVisualizationModel;
  import edu.uci.ics.jung.visualization.GraphZoomScrollPane;
  import edu.uci.ics.jung.visualization.VisualizationModel;
  import edu.uci.ics.jung.visualization.VisualizationViewer;
  import edu.uci.ics.jung.visualization.control.CrossoverScalingControl;
  import edu.uci.ics.jung.visualization.control.DefaultModalGraphMouse;
  import edu.uci.ics.jung.visualization.control.ScalingControl;
  import edu.uci.ics.jung.visualization.decorators.PickableEdgePaintTransformer;
  import edu.uci.ics.jung.visualization.decorators.PickableVertexPaintTransformer;
  import edu.uci.ics.jung.visualization.decorators.ToStringLabeller;
  import edu.uci.ics.jung.visualization.picking.PickedState;
  import edu.uci.ics.jung.visualization.renderers.Renderer;
  
  /**
   * Demonstrates vertex label positioning 
   * controlled by the user.
   * In the AUTO setting, labels are placed according to
   * which quadrant the vertex is in
   * 
   * @author Tom Nelson
   * 
   */
  @SuppressWarnings("serial")
  public class VertexLabelPositionDemo extends JApplet {
  
      /**
       * the graph
       */
      Graph<String,Number> graph;
      
      Layout<String,Number> graphLayout;
      
      /**
       * the visual component and renderer for the graph
       */
      VisualizationViewer<String,Number> vv;
      
      ScalingControl scaler;
      
      /**
       * create an instance of a simple graph with controls to
       * demo the zoomand hyperbolic features.
       * 
       */
      public VertexLabelPositionDemo() {
          
          // create a simple graph for the demo
          graph = TestGraphs.getOneComponentGraph();
          
          graphLayout = new FRLayout<String,Number>(graph);
          ((FRLayout)graphLayout).setMaxIterations(1000);
  
          Dimension preferredSize = new Dimension(600,600);
          
          final VisualizationModel<String,Number> visualizationModel = 
              new DefaultVisualizationModel<String,Number>(graphLayout, preferredSize);
          vv =  new VisualizationViewer<String,Number>(visualizationModel, preferredSize);
  
          PickedState<String> ps = vv.getPickedVertexState();
          PickedState<Number> pes = vv.getPickedEdgeState();
          vv.getRenderContext().setVertexFillPaintTransformer(new PickableVertexPaintTransformer<String>(ps, Color.red, Color.yellow));
          vv.getRenderContext().setEdgeDrawPaintTransformer(new PickableEdgePaintTransformer<Number>(pes, Color.black, Color.cyan));
          vv.setBackground(Color.white);
          vv.getRenderer().getVertexLabelRenderer().setPosition(Renderer.VertexLabel.Position.W);
          
          vv.getRenderContext().setVertexLabelTransformer(new ToStringLabeller());
          
         // add a listener for ToolTips
         vv.setVertexToolTipTransformer(new ToStringLabeller());
         
         Container content = getContentPane();
         GraphZoomScrollPane gzsp = new GraphZoomScrollPane(vv);
         content.add(gzsp);
         
         /**
          * the regular graph mouse for the normal view
          */
         final DefaultModalGraphMouse graphMouse = new DefaultModalGraphMouse();
 
         vv.setGraphMouse(graphMouse);
         vv.addKeyListener(graphMouse.getModeKeyListener());
         
         final ScalingControl scaler = new CrossoverScalingControl();
 
         JButton plus = new JButton("+");
         plus.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                 scaler.scale(vv, 1.1f, vv.getCenter());
             }
         });
         JButton minus = new JButton("-");
         minus.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent e) {
                 scaler.scale(vv, 1/1.1f, vv.getCenter());
             }
         });
         JPanel positionPanel = new JPanel();
         positionPanel.setBorder(BorderFactory.createTitledBorder("Label Position"));
         JMenuBar menubar = new JMenuBar();
         menubar.add(graphMouse.getModeMenu());
         gzsp.setCorner(menubar);
         JComboBox cb = new JComboBox();
         cb.addItem(Renderer.VertexLabel.Position.N);
         cb.addItem(Renderer.VertexLabel.Position.NE);
         cb.addItem(Renderer.VertexLabel.Position.E);
         cb.addItem(Renderer.VertexLabel.Position.SE);
         cb.addItem(Renderer.VertexLabel.Position.S);
         cb.addItem(Renderer.VertexLabel.Position.SW);
         cb.addItem(Renderer.VertexLabel.Position.W);
         cb.addItem(Renderer.VertexLabel.Position.NW);
         cb.addItem(Renderer.VertexLabel.Position.N);
         cb.addItem(Renderer.VertexLabel.Position.CNTR);
         cb.addItem(Renderer.VertexLabel.Position.AUTO);
         cb.addItemListener(new ItemListener() {
 			public void itemStateChanged(ItemEvent e) {
 				Renderer.VertexLabel.Position position = 
 					(Renderer.VertexLabel.Position)e.getItem();
 				vv.getRenderer().getVertexLabelRenderer().setPosition(position);
 				vv.repaint();
 			}});
         cb.setSelectedItem(Renderer.VertexLabel.Position.SE);
         positionPanel.add(cb);
         JPanel controls = new JPanel();
         JPanel zoomControls = new JPanel(new GridLayout(2,1));
         zoomControls.setBorder(BorderFactory.createTitledBorder("Zoom"));
         zoomControls.add(plus);
         zoomControls.add(minus);
         
         controls.add(zoomControls);
         controls.add(positionPanel);
         content.add(controls, BorderLayout.SOUTH);
     }
 
     /**
      * a driver for this demo
      */
     public static void main(String[] args) {
         JFrame f = new JFrame();
         f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
         f.getContentPane().add(new VertexLabelPositionDemo());
         f.pack();
         f.setVisible(true);
     }
 }