universe@3: /*
universe@3:  * Copyright 2013 Mike Becker. All rights reserved.
universe@3:  * 
universe@3:  * Redistribution and use in source and binary forms, with or without
universe@3:  * modification, are permitted provided that the following conditions are met:
universe@3:  * 
universe@3:  * 1. Redistributions of source code must retain the above copyright
universe@3:  *    notice, this list of conditions and the following disclaimer.
universe@3:  * 
universe@3:  * 2. Redistributions in binary form must reproduce the above copyright
universe@3:  *    notice, this list of conditions and the following disclaimer in the
universe@3:  *    documentation and/or other materials provided with the distribution.
universe@3:  * 
universe@3:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@3:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@3:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@3:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@3:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@3:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@3:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@3:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@3:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@3:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@3:  * POSSIBILITY OF SUCH DAMAGE.
universe@3:  */
universe@3: 
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@3:                 char c = e.getKeyChar();
universe@3:                 if (!e.isAltDown() && !e.isControlDown() &&
universe@3:                         Character.isLetterOrDigit(c)) {
universe@3:                     // Perform clean input check
universe@3:                     if (getText().length() > 0 && getSelectedText() == null) {
universe@1:                         e.consume();
universe@3:                     } else {
universe@3:                         if (c < '1' || c > '9') {
universe@3:                             e.consume();
universe@3:                         } else {
universe@3:                             setModified(true);
universe@3:                         }
universe@1:                     }
universe@1:                 } else {
universe@3:                     // We can still be tricked by hotkeys, so do it the hard way
universe@3:                     if (!getText().matches("^[1-9]$")) {
universe@3:                         setText("");
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@4:             @Override
universe@4:             public void focusLost(FocusEvent e) {
universe@4:                 select(0, 0);
universe@4:             }
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: }