--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/main/java/de/uapcore/sudoku/SudokuTextField.java Sat Jul 25 14:01:28 2020 +0200
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2013 Mike Becker. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package de.uapcore.sudoku;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.FocusAdapter;
+import java.awt.event.FocusEvent;
+import java.awt.event.KeyAdapter;
+import java.awt.event.KeyEvent;
+
+/**
+ *
+ * @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) {
+ char c = e.getKeyChar();
+ if (!e.isAltDown() && !e.isControlDown() &&
+ !Character.isISOControl(c)) {
+ // Perform clean input check
+ if (getText().length() > 0 && getSelectedText() == null) {
+ if (c != KeyEvent.CHAR_UNDEFINED) {
+ e.consume();
+ }
+ } else {
+ if (c < '1' || c > '9') {
+ e.consume();
+ } else {
+ setModified(true);
+ }
+ }
+ } else {
+ // We can still be tricked by hotkeys, so do it the hard way
+ if (!getText().matches("^[1-9]$")) {
+ setText("");
+ }
+ }
+ }
+
+ @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();
+ }
+ @Override
+ public void focusLost(FocusEvent e) {
+ select(0, 0);
+ }
+ });
+ }
+
+ 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;
+ }
+}