added license and main menu

Sat, 26 Jan 2013 18:38:12 +0100

author
Mike Becker <universe@uap-core.de>
date
Sat, 26 Jan 2013 18:38:12 +0100
changeset 3
ed931970b4ac
parent 2
5179eff8a9b6
child 4
b8588e318001

added license and main menu

LICENSE file | annotate | diff | comparison | revisions
src/de/uapcore/sudoku/ActionHandler.java file | annotate | diff | comparison | revisions
src/de/uapcore/sudoku/ButtonPanel.java file | annotate | diff | comparison | revisions
src/de/uapcore/sudoku/Field.java file | annotate | diff | comparison | revisions
src/de/uapcore/sudoku/MainMenu.java file | annotate | diff | comparison | revisions
src/de/uapcore/sudoku/Solver.java file | annotate | diff | comparison | revisions
src/de/uapcore/sudoku/Sudoku.java file | annotate | diff | comparison | revisions
src/de/uapcore/sudoku/SudokuTextField.java file | annotate | diff | comparison | revisions
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LICENSE	Sat Jan 26 18:38:12 2013 +0100
@@ -0,0 +1,25 @@
+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.
+
+
--- a/src/de/uapcore/sudoku/ActionHandler.java	Sat Jan 26 17:42:07 2013 +0100
+++ b/src/de/uapcore/sudoku/ActionHandler.java	Sat Jan 26 18:38:12 2013 +0100
@@ -1,3 +1,29 @@
+/*
+ * 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 java.awt.event.ActionEvent;
@@ -14,6 +40,12 @@
     public static final String CHECK = "check";
     public static final String SOLVE = "solve";
     
+    public static final String NEW = "new";
+    public static final String OPEN = "open";
+    public static final String SAVE_AS = "save as";
+    public static final String QUIT = "quit";
+    public static final String ABOUT = "about";
+    
     private Field field;
     private Solver solver;
     
@@ -22,14 +54,16 @@
         solver = new Solver();
     }
     
-    private void save() {
+    private boolean save() {
         if (solver.check(field)) {
             field.setAllCellsModified(false);
             // TODO: save to file
+            return true;
         } else {
             JOptionPane.showMessageDialog(field,
                     "Das Feld kann mit Fehlern nicht gespeichert werden!",
                     "Sudoku", JOptionPane.ERROR_MESSAGE);
+            return false;
         }
     }
     
@@ -50,15 +84,37 @@
     @Override
     public void actionPerformed(ActionEvent e) {
         switch (e.getActionCommand()) {
-        case "save":
+        case SAVE:
             save();
             break;
-        case "check":
+        case CHECK:
             check();
             break;
-        case "solve":
+        case SOLVE:
             solve();
             break;
+        case QUIT:
+            if (field.isAnyCellModified()) {
+                int result = JOptionPane.showConfirmDialog(field,
+                        "Das Feld ist ungespeichert - jetzt speichern?",
+                        "Sudoku", JOptionPane.YES_NO_CANCEL_OPTION);
+                if (result == JOptionPane.YES_OPTION) {
+                    if (save()) {
+                        System.exit(0);
+                    }
+                } else if (result == JOptionPane.NO_OPTION) {
+                    System.exit(0);
+                }
+            } else {
+                System.exit(0);
+            }
+            break;
+        case ABOUT:
+            JOptionPane.showMessageDialog(field,
+                    "Sudoku - Copyright (c) 2013 Mike Becker\nwww.uap-core.de"+
+                    "\nPublished under the BSD License",
+                    "Sudoku", JOptionPane.INFORMATION_MESSAGE);
+            break;
         default:
             throw new UnsupportedOperationException(
                     "unknown action: "+e.getActionCommand());
--- a/src/de/uapcore/sudoku/ButtonPanel.java	Sat Jan 26 17:42:07 2013 +0100
+++ b/src/de/uapcore/sudoku/ButtonPanel.java	Sat Jan 26 18:38:12 2013 +0100
@@ -1,3 +1,29 @@
+/*
+ * 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 java.awt.Color;
--- a/src/de/uapcore/sudoku/Field.java	Sat Jan 26 17:42:07 2013 +0100
+++ b/src/de/uapcore/sudoku/Field.java	Sat Jan 26 18:38:12 2013 +0100
@@ -1,3 +1,29 @@
+/*
+ * 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 java.awt.Color;
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/de/uapcore/sudoku/MainMenu.java	Sat Jan 26 18:38:12 2013 +0100
@@ -0,0 +1,101 @@
+/*
+ * 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.JMenu;
+import javax.swing.JMenuBar;
+import javax.swing.JMenuItem;
+import javax.swing.KeyStroke;
+
+/**
+ *
+ * @author mike
+ */
+public class MainMenu {
+    
+    private ActionHandler handler;
+    private JMenuBar menuBar;
+    
+    public MainMenu(ActionHandler h) {
+        handler = h;
+        menuBar = new JMenuBar();
+        menuBar.add(createMenu("Datei", 'd',
+            createMenuItem("Neu", 'n', "control N", ActionHandler.NEW),
+            createMenuItem("Öffnen", 'f', "control O", ActionHandler.OPEN),
+            createMenuItem("Speichern", 's', "control S", ActionHandler.SAVE),
+            createMenuItem("Speichern als...", 'a', ActionHandler.SAVE_AS),
+            createSeparator(),
+            createMenuItem("Prüfen", 'p', "control P", ActionHandler.CHECK),
+            createMenuItem("Lösen", 'l', "control L", ActionHandler.SOLVE),
+            createSeparator(),
+            createMenuItem("Beenden", 'e', ActionHandler.QUIT)
+        ));
+        menuBar.add(createMenu("Help", 'h',
+            createMenuItem("Über...", 'b', "F1", ActionHandler.ABOUT)
+        ));
+    }
+    
+    private JMenuItem createSeparator() {
+        // Return null, the createMenu method knows how to handle it
+        return null;
+    }
+    
+    private JMenu createMenu(String caption, char mnemonic, JMenuItem...items) {
+        JMenu menu = new JMenu(caption);
+        menu.setMnemonic(mnemonic);
+        for (JMenuItem item : items) {
+            if (item == null) {
+                menu.addSeparator();
+            } else {
+                menu.add(item);
+            }
+        }
+        return menu;
+    }
+    
+    private JMenuItem createMenuItem(String caption, char mnemonic,
+            String command) {
+        return createMenuItem(caption, mnemonic, null, command);
+    }
+    
+    private JMenuItem createMenuItem(String caption, char mnemonic,
+            String stroke, String command) {
+        JMenuItem item = new JMenuItem(caption);
+        item.setMnemonic(mnemonic);
+        if (stroke != null) {
+            item.setAccelerator(KeyStroke.getKeyStroke(stroke));
+        }
+        item.setActionCommand(command);
+        item.addActionListener(handler);
+        
+        return item;
+    }
+    
+    public JMenuBar getMenuBar() {
+        return menuBar;
+    }
+}
--- a/src/de/uapcore/sudoku/Solver.java	Sat Jan 26 17:42:07 2013 +0100
+++ b/src/de/uapcore/sudoku/Solver.java	Sat Jan 26 18:38:12 2013 +0100
@@ -1,3 +1,29 @@
+/*
+ * 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;
 
 /**
--- a/src/de/uapcore/sudoku/Sudoku.java	Sat Jan 26 17:42:07 2013 +0100
+++ b/src/de/uapcore/sudoku/Sudoku.java	Sat Jan 26 18:38:12 2013 +0100
@@ -1,11 +1,37 @@
+/*
+ * 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 java.awt.Color;
+import java.awt.Container;
 import java.awt.GridBagConstraints;
 import java.awt.GridBagLayout;
 import java.awt.Insets;
 import javax.swing.JFrame;
-import javax.swing.JRootPane;
 
 /**
  *
@@ -18,21 +44,22 @@
         
         Field f = new Field();
         ActionHandler h = new ActionHandler(f);
+        setJMenuBar(new MainMenu(h).getMenuBar());
         
-        JRootPane root = getRootPane();
+        Container content = getContentPane();
         
-        root.setLayout(new GridBagLayout());
+        content.setLayout(new GridBagLayout());
         GridBagConstraints c = new GridBagConstraints();
         c.insets = new Insets(20, 20, 20, 20);
         c.fill = GridBagConstraints.HORIZONTAL;
         
         c.gridx = 0; c.gridy = 0;
-        root.add(f, c);
+        content.add(f, c);
         c.gridy++;
-        root.add(new ButtonPanel(h), c);
+        content.add(new ButtonPanel(h), c);
         
         pack();
-        root.setBackground(Color.WHITE);
+        content.setBackground(Color.WHITE);
         setLocationByPlatform(true);
         setDefaultCloseOperation(EXIT_ON_CLOSE);
     }
--- a/src/de/uapcore/sudoku/SudokuTextField.java	Sat Jan 26 17:42:07 2013 +0100
+++ b/src/de/uapcore/sudoku/SudokuTextField.java	Sat Jan 26 18:38:12 2013 +0100
@@ -1,3 +1,29 @@
+/*
+ * 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 java.awt.Color;
@@ -31,19 +57,23 @@
         
         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()) {
+                char c = e.getKeyChar();
+                if (!e.isAltDown() && !e.isControlDown() &&
+                        Character.isLetterOrDigit(c)) {
+                    // Perform clean input check
+                    if (getText().length() > 0 && getSelectedText() == null) {
                         e.consume();
+                    } else {
+                        if (c < '1' || c > '9') {
+                            e.consume();
+                        } else {
+                            setModified(true);
+                        }
                     }
                 } else {
-                    char c = e.getKeyChar();
-                    if (c < '0' || c > '9') {
-                        e.consume();
-                    } else {
-                        setModified(true);
+                    // We can still be tricked by hotkeys, so do it the hard way
+                    if (!getText().matches("^[1-9]$")) {
+                        setText("");
                     }
                 }
             }

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