StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

PO
text
Body
copied!<p>Here's an example of a resizable component that might be suitable for such a game. Although it contains no game logic, it handles input reasonably well. Clicking the mouse or pressing the space bar pop's up a menu, and the tab and number keys work as expected. In particular, <code>Digit.EMPTY</code> is a valid value.</p> <p><img src="https://i.stack.imgur.com/ffDYr.png" alt="alt text"></p> <pre><code>import java.awt.*; import java.awt.event.*; import java.awt.image.BufferedImage; import java.util.EnumSet; import javax.swing.*; /** @see http://stackoverflow.com/questions/4148336 */ public class CellTest extends JPanel { public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { //@Override public void run() { createGUI(); } }); } public static void createGUI() { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setLayout(new GridLayout(3, 3)); for (Digit d : Digit.digits) { frame.add(new CellTest(d)); } frame.pack(); frame.setVisible(true); } CellTest(Digit digit) { this.setLayout(new BorderLayout()); this.setBorder(BorderFactory.createLineBorder(Color.black, 1)); this.setBackground(new Color(0x00e0e0)); JLabel candidates = new JLabel("123456789"); candidates.setHorizontalAlignment(JLabel.CENTER); this.add(candidates, BorderLayout.NORTH); JDigit cellValue = new JDigit(digit); add(cellValue, BorderLayout.CENTER); } } class JDigit extends JButton { private static final int SIZE = 128; private static final int BASE = SIZE / 32; private static final Font FONT = new Font("Serif", Font.BOLD, SIZE); private JPopupMenu popup = new JPopupMenu(); private Digit digit; private Image image; private int width, height; public JDigit(Digit digit) { this.digit = digit; this.image = getImage(digit); this.setPreferredSize(new Dimension(64, 64)); this.setBackground(new Color(0xe0e000)); this.setForeground(Color.black); this.setBorderPainted(false); this.setAction(new ButtonAction()); this.addFocusListener(new FocusHandler()); for (Digit d : Digit.values()) { Action select = new SelectAction(d); JMenuItem item = new JMenuItem(select); getInputMap().put(KeyStroke.getKeyStroke( KeyEvent.VK_0 + d.value(), 0), d.toString()); getInputMap().put(KeyStroke.getKeyStroke( KeyEvent.VK_NUMPAD0 + d.value(), 0), d.toString()); getActionMap().put(d.toString(), select); popup.add(item); } } public Digit getDigit() { return digit; } public void setDigit(Digit digit) { this.digit = digit; this.image = getImage(digit); this.repaint(); } @Override protected void paintComponent(Graphics g) { int w = this.getWidth(); int h = this.getHeight(); g.setColor(this.getBackground()); int dx1 = w * width / height / 4; int dx2 = w - dx1; g.fillRect(dx1, 0, dx2 - dx1, h); g.drawImage(image, dx1, 0, dx2, h, 0, 0, width, height, null); } private Image getImage(Digit digit) { BufferedImage bi = new BufferedImage( SIZE, SIZE, BufferedImage.TYPE_INT_ARGB); Graphics2D g2d = bi.createGraphics(); g2d.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setColor(this.getForeground()); g2d.setFont(FONT); FontMetrics fm = g2d.getFontMetrics(); width = fm.stringWidth(digit.toString()); height = fm.getAscent(); g2d.drawString(digit.toString(), 0, height - BASE); g2d.dispose(); return bi; } private class ButtonAction extends AbstractAction { //@Override public void actionPerformed(ActionEvent e) { popup.show(JDigit.this, getWidth() - width, getHeight() / 2); } } private class SelectAction extends AbstractAction { private Digit digit; public SelectAction(Digit digit) { this.digit = digit; this.putValue(Action.NAME, digit.toString()); } //@Override public void actionPerformed(ActionEvent e) { setDigit(digit); } } private class FocusHandler implements FocusListener { private Color background = getBackground(); //@Override public void focusGained(FocusEvent e) { setBackground(background.brighter()); } //@Override public void focusLost(FocusEvent e) { setBackground(background); } } } enum Digit { EMPTY(0, " "), ONE(1, "1"), TWO(2, "2"), THREE(3, "3"), FOUR(4, "4"), FIVE(5, "5"), SIX(6, "6"), SEVEN(7, "7"), EIGHT(8, "8"), NINE(9, "9"); public static EnumSet<Digit> digits = EnumSet.range(Digit.ONE, Digit.NINE); private int i; private String s; Digit(int i, String s) { this.i = i; this.s = s; } @Override public String toString() { return s; } public int value() { return i; } } </code></pre>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload