Mercurial > hg > Sudoku / file revision

package de.uapcore.sudoku;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import javax.swing.JTextField;

/**
 *
 * @author mike
 */
public final class SudokuTextField extends JTextField {
    
    private boolean modified;
    
    public SudokuTextField() {
        setBorder(null);
        setBackground(Color.WHITE);
        
        setFont(new Font("Dialog", Font.PLAIN, 18));
        setHorizontalAlignment(JTextField.CENTER);
        
        Dimension dim = new Dimension(40,40);
        setPreferredSize(dim);
        setMinimumSize(dim);
        setMaximumSize(dim);
        
        addKeyListener(new KeyAdapter() {
            private void handle(KeyEvent e) {
                if (getText().length() > 0 && getSelectedText() == null) {
                    int c = e.getKeyCode();
                    if (c != KeyEvent.VK_DELETE &&
                            c != KeyEvent.VK_BACK_SPACE &&
                            !e.isActionKey()) {
                        e.consume();
                    }
                } else {
                    char c = e.getKeyChar();
                    if (c < '0' || c > '9') {
                        e.consume();
                    } else {
                        setModified(true);
                    }
                }
            }
            
            @Override
            public void keyPressed(KeyEvent e) {
                handle(e);
            }

            @Override
            public void keyTyped(KeyEvent e) {
                handle(e);
            }

            @Override
            public void keyReleased(KeyEvent e) {
                handle(e);
            }
            
        });
        addFocusListener(new FocusAdapter() {
            @Override
            public void focusGained(FocusEvent e) {
                selectAll();
            }
        });
    }
    
    public int getValue() {
        if (getText().length() > 0) {
            return Integer.valueOf(getText());
        } else {
            return 0;
        }
    }
    
    public void setValue(int v) {
        if (v == 0) {
            setText("");
        } else if (v < 10) {
            setText(String.valueOf(v));
        } else {
            throw new IllegalArgumentException(
                    "Sudoku numbers must be in range 0-9 (0 means 'not set')");
        }
    }
    
    public void setModified(boolean modified) {
        this.modified = modified;
        setForeground(modified?Color.BLUE:Color.BLACK);
    }
    
    public boolean isModified() {
        return modified;
    }
}