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GeometricTreeDemo.java
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GeometricTreeDemo.java
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package comp2402a6;
/*
* Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle or the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
/* MenuDemo.java requires images/middle.gif. */
/*
* This class is just like MenuLookDemo, except the menu items
* actually do something, thanks to event listeners.
*/
public class GeometricTreeDemo implements ActionListener, ItemListener {
GeometricTree t;
JPanel output;
JScrollPane scrollPane;
String newline = "\n";
public GeometricTreeDemo() {
t = new GeometricTree();
GeometricTree.completeBinaryTree(t, 50);
t.inorderDraw();
}
public JMenuBar createMenuBar() {
JMenuBar menuBar;
JMenu menu;
JMenuItem menuItem;
// Create the menu bar.
menuBar = new JMenuBar();
// Build the first menu.
menu = new JMenu("Actions");
menuBar.add(menu);
// a group of JMenuItems
menuItem = new JMenuItem("new galton-watson tree");
menuItem.addActionListener(this);
menu.add(menuItem);
menuItem = new JMenuItem("new complete binary tree");
menuItem.addActionListener(this);
menu.add(menuItem);
menu.addSeparator();
menuItem = new JMenuItem("in-order layout");
menuItem.addActionListener(this);
menu.add(menuItem);
menuItem = new JMenuItem("leftist layout");
menuItem.addActionListener(this);
menu.add(menuItem);
menuItem = new JMenuItem("balanced layout");
menuItem.addActionListener(this);
menu.add(menuItem);
menuBar.add(menu);
return menuBar;
}
public Container createContentPane() {
// Create the content-pane-to-be.
JPanel contentPane = new JPanel(new BorderLayout());
contentPane.setOpaque(true);
// Create a scrolled text area.
output = new JPanel() {
private static final long serialVersionUID = 2196729896823372494L;
public void paint(Graphics g) {
if (t != null) recursivePaint(g, t.r);
}
protected void recursivePaint(Graphics g, GeometricTreeNode u) {
final int r = 10, m = 20;
if (u == null) return;
g.fillOval(u.position.x * m, u.position.y * m, r, r);
if (u.left != null) {
g.drawLine(u.position.x * m + r/2, u.position.y * m + r/2,
u.left.position.x * m + r/2, u.left.position.y *m + r/2);
recursivePaint(g, u.left);
}
if (u.right != null) {
g.drawLine(u.position.x * m + r/2, u.position.y * m + r/2,
u.right.position.x * m + r/2, u.right.position.y *m + r/2);
recursivePaint(g, u.right);
}
}
};
// Add the text area to the content pane.
contentPane.add(output, BorderLayout.CENTER);
return contentPane;
}
public void actionPerformed(ActionEvent e) {
JMenuItem source = (JMenuItem) (e.getSource());
String s = "Action event detected." + newline + " Event source: "
+ source.getText();
System.out.println(s);
if (source.getText().equals("new galton-watson tree")) {
t.clear();
GeometricTree.galtonWatsonTree(t, 100);
t.inorderDraw();
output.repaint();
} else if (source.getText().equals("new complete binary tree")) {
t.clear();
GeometricTree.completeBinaryTree(t, 50);
t.inorderDraw();
output.repaint();
} else if (source.getText().equals("in-order layout")) {
t.inorderDraw();
output.repaint();
} else if (source.getText().equals("leftist layout")) {
t.leftistDraw();
output.repaint();
} else if (source.getText().equals("balanced layout")) {
t.balancedDraw();
output.repaint();
}
}
public void itemStateChanged(ItemEvent e) {
// JMenuItem source = (JMenuItem) (e.getSource());
// String s = "Item event detected."
// + newline
// + " Event source: "
// + source.getText()
// + newline
// + " New state: "
// + ((e.getStateChange() == ItemEvent.SELECTED) ? "selected"
// : "unselected");
// System.out.println(s);
}
/**
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
*/
private static void createAndShowGUI() {
// Create and set up the window.
JFrame frame = new JFrame("MenuDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// Create and set up the content pane.
GeometricTreeDemo demo = new GeometricTreeDemo();
frame.setJMenuBar(demo.createMenuBar());
frame.setContentPane(demo.createContentPane());
// Display the window.
frame.setSize(450, 260);
frame.setVisible(true);
}
public static void main(String[] args) {
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
}