82 lines
2.3 KiB
Java
82 lines
2.3 KiB
Java
//: bangbean/BangBean.java
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// A graphical Bean.
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package bangbean;
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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.*;
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import java.io.*;
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import java.util.*;
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public class
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BangBean extends JPanel implements Serializable {
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private int xm, ym;
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private int cSize = 20; // Circle size
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private String text = "Bang!";
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private int fontSize = 48;
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private Color tColor = Color.RED;
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private ActionListener actionListener;
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public BangBean() {
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addMouseListener(new ML());
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addMouseMotionListener(new MML());
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}
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public int getCircleSize() { return cSize; }
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public void setCircleSize(int newSize) {
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cSize = newSize;
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}
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public String getBangText() { return text; }
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public void setBangText(String newText) {
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text = newText;
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}
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public int getFontSize() { return fontSize; }
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public void setFontSize(int newSize) {
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fontSize = newSize;
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}
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public Color getTextColor() { return tColor; }
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public void setTextColor(Color newColor) {
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tColor = newColor;
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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.setColor(Color.BLACK);
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g.drawOval(xm - cSize/2, ym - cSize/2, cSize, cSize);
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}
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// This is a unicast listener, which is
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// the simplest form of listener management:
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public void addActionListener(ActionListener l)
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throws TooManyListenersException {
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if(actionListener != null)
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throw new TooManyListenersException();
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actionListener = l;
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}
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public void removeActionListener(ActionListener l) {
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actionListener = null;
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}
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class ML extends MouseAdapter {
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public void mousePressed(MouseEvent e) {
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Graphics g = getGraphics();
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g.setColor(tColor);
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g.setFont(
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new Font("TimesRoman", Font.BOLD, fontSize));
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int width = g.getFontMetrics().stringWidth(text);
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g.drawString(text, (getSize().width - width) /2,
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getSize().height/2);
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g.dispose();
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// Call the listener's method:
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if(actionListener != null)
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actionListener.actionPerformed(
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new ActionEvent(BangBean.this,
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ActionEvent.ACTION_PERFORMED, null));
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}
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}
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class MML extends MouseMotionAdapter {
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public void mouseMoved(MouseEvent e) {
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xm = e.getX();
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ym = e.getY();
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repaint();
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}
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}
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public Dimension getPreferredSize() {
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return new Dimension(200, 200);
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}
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} ///:~
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