package edu.cmu.cs.cs214.guidemo;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.FontMetrics;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.concurrent.ExecutionException;
import javax.swing.JFormattedTextField;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingWorker;
public class GUIdemo extends JPanel {
	
	private long inputNumber = 1;
	private long outputNumber = 1;
	
	private final int MAX_DIGITS = 10;
	
	private final JLabel fibonacciLabel; 
	public GUIdemo() {
		JLabel inputLabel = new JLabel("Enter an input number: ");
		JFormattedTextField inputText = new JFormattedTextField(inputNumber);
		fibonacciLabel = new JLabel("fibonacci("+ inputNumber + ") is " + outputNumber);
		// compute an appropriate size for the input so it doesn't look too bad
		FontMetrics fontMetrics = inputText.getFontMetrics(inputText.getFont());
		int width = fontMetrics.getWidths()['0'] * MAX_DIGITS;
		int height = fontMetrics.getHeight();
		inputText.setPreferredSize(new Dimension(width,height));
		
		// Add the components we've created
		// Put a panel at the top with the input information
		JPanel inputPanel = new JPanel();
		inputPanel.setLayout(new BorderLayout());
		inputPanel.add(inputLabel, BorderLayout.WEST);
		inputPanel.add(inputText, BorderLayout.EAST);
		this.setLayout(new BorderLayout());
		add(inputPanel, BorderLayout.NORTH);
		
		// put the output label on the bottom
		add(fibonacciLabel, BorderLayout.SOUTH);
		
		// set up a listener to the input text
		inputText.addPropertyChangeListener("value",new PropertyChangeListener() {
			@Override
			public void propertyChange(PropertyChangeEvent evt) {
				inputNumber = (Long) evt.getNewValue();
				
				//backgroundFibonacci();
				
				outputNumber = fibonacci(inputNumber);
				displayResult();
			}			
		});
	}
	
	public static long fibonacci(long input) {
		if (input <= 2) return 1; else return fibonacci(input-1) + fibonacci(input-2); } private void displayResult() { fibonacciLabel.setText("fibonacci("+ inputNumber + ") is " + outputNumber); } void backgroundFibonacci() { SwingWorker<long, Void> worker = new SwingWorker<long, Void>() {
	
			@Override
			protected Long doInBackground() throws Exception {
				return fibonacci(inputNumber);
			}
			
			@Override
	 public void done() {
				try {
					outputNumber = get();
					displayResult();
				} catch (InterruptedException e) {
					e.printStackTrace();
				} catch (ExecutionException e) {
					e.printStackTrace();
				}
			}
		};
		
		worker.execute();
	}
	
	public static void main(String args[]) {
		// creates a main window object
		JFrame frame = new JFrame("15-214 GUI Demo");
		
		// adds a pane to the main window
		frame.add(new GUIdemo());
		
		// ensures the application will exit when the main window closes
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		// sets the size of the frame to just hold its transitive components
		frame.pack();
		
		// shows the window, making the GUI interactive
		frame.setVisible(true);		
	}
	
	
}
</div><div class="naked_ctrl">
<form action="/index.cgi/contrast" method="get" name="gate">
<p><a href="http://altstyle.alfasado.net">AltStyle</a> によって変換されたページ <a href="http://www.cs.cmu.edu/~charlie/courses/15-214/2013-fall/slides/GUIdemo.java">(-&gt;オリジナル)</a>
/ <label>アドレス: <input type="text" name="naked_post_url" value="http://www.cs.cmu.edu/~charlie/courses/15-214/2013-fall/slides/GUIdemo.java" size="22" /></label> <label>モード: <select name="naked_post_mode">
<option value="default">デフォルト</option>
<option value="speech">音声ブラウザ</option>
<option value="ruby">ルビ付き</option>
<option value="contrast" selected="selected">配色反転</option>
<option value="larger-text">文字拡大</option>
<option value="mobile">モバイル</option>
</select>
<input type="submit" value="表示" />
</p>
</form>
</div>