49 lines
1.6 KiB
Java
49 lines
1.6 KiB
Java
// Class CritterPanel displays a grid of critters
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import javax.swing.*;
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import java.awt.Point;
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import java.awt.*;
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import java.awt.event.*;
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import java.util.*;
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public class CritterPanel extends JPanel {
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private CritterModel myModel;
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private Font myFont;
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private static boolean created;
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public static final int FONT_SIZE = 12;
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public CritterPanel(CritterModel model) {
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// this prevents someone from trying to create their own copy of
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// the GUI components
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if (created)
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throw new RuntimeException("Only one world allowed");
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created = true;
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myModel = model;
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// construct font and compute char width once in constructor
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// for efficiency
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myFont = new Font("Monospaced", Font.BOLD, FONT_SIZE + 4);
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setBackground(Color.CYAN);
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setPreferredSize(new Dimension(FONT_SIZE * model.getWidth() + 20,
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FONT_SIZE * model.getHeight() + 20));
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}
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public void paintComponent(Graphics g) {
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super.paintComponent(g);
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g.setFont(myFont);
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Iterator<Critter> i = myModel.iterator();
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while (i.hasNext()) {
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Critter next = i.next();
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Point p = myModel.getPoint(next);
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String appearance = myModel.getAppearance(next);
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g.setColor(Color.BLACK);
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g.drawString("" + appearance, p.x * FONT_SIZE + 11,
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p.y * FONT_SIZE + 21);
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g.setColor(myModel.getColor(next));
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g.drawString("" + appearance, p.x * FONT_SIZE + 10,
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p.y * FONT_SIZE + 20);
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}
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}
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}
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