Sudoku: src/de/uapcore/sudoku/SudokuTextField.java@f1d7de36b01e

     1 package de.uapcore.sudoku;

     3 import java.awt.Color;

     4 import java.awt.Dimension;

     5 import java.awt.Font;

     6 import java.awt.event.FocusAdapter;

     7 import java.awt.event.FocusEvent;

     8 import java.awt.event.KeyAdapter;

     9 import java.awt.event.KeyEvent;

    10 import javax.swing.JTextField;

    12 /**

    13  *

    14  * @author mike

    15  */

    16 public class SudokuTextField extends JTextField {

    18     public SudokuTextField() {

    19         setBorder(null);

    20         setBackground(Color.WHITE);

    22         setFont(new Font("Dialog", Font.PLAIN, 18));

    23         setHorizontalAlignment(JTextField.CENTER);

    25         Dimension dim = new Dimension(40,40);

    26         setPreferredSize(dim);

    27         setMinimumSize(dim);

    28         setMaximumSize(dim);

    30         addKeyListener(new KeyAdapter() {

    31             private void handle(KeyEvent e) {

    32                 if (getText().length() > 0) {

    33                     int c = e.getKeyCode();

    34                     if (c != KeyEvent.VK_DELETE &&

    35                             c != KeyEvent.VK_BACK_SPACE &&

    36                             !e.isActionKey()) {

    37                         e.consume();

    38                     }

    39                 } else {

    40                     char c = e.getKeyChar();

    41                     if (c < '0' || c > '9') {

    42                         e.consume();

    43                     }

    44                 }

    45             }

    47             @Override

    48             public void keyPressed(KeyEvent e) {

    49                 handle(e);

    50             }

    52             @Override

    53             public void keyTyped(KeyEvent e) {

    54                 handle(e);

    55             }

    57             @Override

    58             public void keyReleased(KeyEvent e) {

    59                 handle(e);

    60             }

    62         });

    63         addFocusListener(new FocusAdapter() {

    64             @Override

    65             public void focusGained(FocusEvent e) {

    66                 selectAll();

    67             }

    68         });

    69     }

    71 }

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