universe@1: package de.uapcore.sudoku;
universe@1: 
universe@1: import java.awt.Color;
universe@1: import java.awt.Dimension;
universe@1: import java.awt.Font;
universe@1: import java.awt.event.FocusAdapter;
universe@1: import java.awt.event.FocusEvent;
universe@1: import java.awt.event.KeyAdapter;
universe@1: import java.awt.event.KeyEvent;
universe@1: import javax.swing.JTextField;
universe@1: 
universe@1: /**
universe@1:  *
universe@1:  * @author mike
universe@1:  */
universe@2: public final class SudokuTextField extends JTextField {
universe@2:     
universe@2:     private boolean modified;
universe@1:     
universe@1:     public SudokuTextField() {
universe@1:         setBorder(null);
universe@1:         setBackground(Color.WHITE);
universe@1:         
universe@1:         setFont(new Font("Dialog", Font.PLAIN, 18));
universe@1:         setHorizontalAlignment(JTextField.CENTER);
universe@1:         
universe@1:         Dimension dim = new Dimension(40,40);
universe@1:         setPreferredSize(dim);
universe@1:         setMinimumSize(dim);
universe@1:         setMaximumSize(dim);
universe@1:         
universe@1:         addKeyListener(new KeyAdapter() {
universe@1:             private void handle(KeyEvent e) {
universe@2:                 if (getText().length() > 0 && getSelectedText() == null) {
universe@1:                     int c = e.getKeyCode();
universe@1:                     if (c != KeyEvent.VK_DELETE &&
universe@1:                             c != KeyEvent.VK_BACK_SPACE &&
universe@1:                             !e.isActionKey()) {
universe@1:                         e.consume();
universe@1:                     }
universe@1:                 } else {
universe@1:                     char c = e.getKeyChar();
universe@1:                     if (c < '0' || c > '9') {
universe@1:                         e.consume();
universe@2:                     } else {
universe@2:                         setModified(true);
universe@1:                     }
universe@1:                 }
universe@1:             }
universe@1:             
universe@1:             @Override
universe@1:             public void keyPressed(KeyEvent e) {
universe@1:                 handle(e);
universe@1:             }
universe@1: 
universe@1:             @Override
universe@1:             public void keyTyped(KeyEvent e) {
universe@1:                 handle(e);
universe@1:             }
universe@1: 
universe@1:             @Override
universe@1:             public void keyReleased(KeyEvent e) {
universe@1:                 handle(e);
universe@1:             }
universe@1:             
universe@1:         });
universe@1:         addFocusListener(new FocusAdapter() {
universe@1:             @Override
universe@1:             public void focusGained(FocusEvent e) {
universe@1:                 selectAll();
universe@1:             }
universe@1:         });
universe@1:     }
universe@1:     
universe@2:     public int getValue() {
universe@2:         if (getText().length() > 0) {
universe@2:             return Integer.valueOf(getText());
universe@2:         } else {
universe@2:             return 0;
universe@2:         }
universe@2:     }
universe@2:     
universe@2:     public void setValue(int v) {
universe@2:         if (v == 0) {
universe@2:             setText("");
universe@2:         } else if (v < 10) {
universe@2:             setText(String.valueOf(v));
universe@2:         } else {
universe@2:             throw new IllegalArgumentException(
universe@2:                     "Sudoku numbers must be in range 0-9 (0 means 'not set')");
universe@2:         }
universe@2:     }
universe@2:     
universe@2:     public void setModified(boolean modified) {
universe@2:         this.modified = modified;
universe@2:         setForeground(modified?Color.BLUE:Color.BLACK);
universe@2:     }
universe@2:     
universe@2:     public boolean isModified() {
universe@2:         return modified;
universe@2:     }
universe@1: }