Mon, 27 Jul 2020 12:08:23 +0200
fix: window cannot get smaller than the field
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1 | /* |
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2 | * Copyright 2013 Mike Becker. All rights reserved. |
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3 | * |
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4 | * Redistribution and use in source and binary forms, with or without |
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5 | * modification, are permitted provided that the following conditions are met: |
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6 | * |
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7 | * 1. Redistributions of source code must retain the above copyright |
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8 | * notice, this list of conditions and the following disclaimer. |
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9 | * |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * |
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14 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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15 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
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18 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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19 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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20 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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21 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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22 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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23 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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24 | * POSSIBILITY OF SUCH DAMAGE. |
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25 | */ |
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26 | |
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27 | package de.uapcore.sudoku; |
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28 | |
9 | 29 | import javax.swing.*; |
30 | import java.awt.*; | |
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31 | import java.awt.event.FocusAdapter; |
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32 | import java.awt.event.FocusEvent; |
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33 | import java.awt.event.KeyAdapter; |
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34 | import java.awt.event.KeyEvent; |
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35 | |
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36 | /** |
10 | 37 | * A custom text field specifically for Sudoku number fields. |
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38 | */ |
2 | 39 | public final class SudokuTextField extends JTextField { |
40 | ||
41 | private boolean modified; | |
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42 | |
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43 | public SudokuTextField() { |
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44 | setBorder(null); |
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45 | setBackground(Color.WHITE); |
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46 | |
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47 | setFont(new Font("Dialog", Font.PLAIN, 18)); |
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48 | setHorizontalAlignment(JTextField.CENTER); |
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49 | |
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50 | Dimension dim = new Dimension(40,40); |
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51 | setPreferredSize(dim); |
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52 | setMinimumSize(dim); |
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53 | setMaximumSize(dim); |
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54 | |
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55 | addKeyListener(new KeyAdapter() { |
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56 | private void handle(KeyEvent e) { |
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57 | char c = e.getKeyChar(); |
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58 | if (!e.isAltDown() && !e.isControlDown() && |
6 | 59 | !Character.isISOControl(c)) { |
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60 | // Perform clean input check |
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61 | if (getText().length() > 0 && getSelectedText() == null) { |
6 | 62 | if (c != KeyEvent.CHAR_UNDEFINED) { |
63 | e.consume(); | |
64 | } | |
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65 | } else { |
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66 | if (c < '1' || c > '9') { |
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67 | e.consume(); |
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68 | } else { |
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69 | setModified(true); |
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70 | } |
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71 | } |
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72 | } else { |
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73 | // We can still be tricked by hotkeys, so do it the hard way |
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74 | if (!getText().matches("^[1-9]$")) { |
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75 | setText(""); |
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76 | } |
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77 | } |
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78 | } |
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79 | |
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80 | @Override |
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81 | public void keyPressed(KeyEvent e) { |
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82 | handle(e); |
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83 | } |
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84 | |
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85 | @Override |
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86 | public void keyTyped(KeyEvent e) { |
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87 | handle(e); |
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88 | } |
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89 | |
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90 | @Override |
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91 | public void keyReleased(KeyEvent e) { |
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92 | handle(e); |
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93 | } |
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94 | |
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95 | }); |
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96 | addFocusListener(new FocusAdapter() { |
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97 | @Override |
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98 | public void focusGained(FocusEvent e) { |
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99 | selectAll(); |
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100 | } |
4 | 101 | @Override |
102 | public void focusLost(FocusEvent e) { | |
103 | select(0, 0); | |
104 | } | |
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105 | }); |
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106 | } |
10 | 107 | |
108 | /** | |
109 | * Returns the current value in the field or zero if the field is empty. | |
110 | * | |
111 | * @return the number from 1 to 9 or zero if empty | |
112 | */ | |
2 | 113 | public int getValue() { |
10 | 114 | if (getText().isEmpty()) { |
115 | return 0; | |
116 | } else { | |
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117 | return Integer.parseInt(getText()); |
2 | 118 | } |
119 | } | |
10 | 120 | |
121 | /** | |
122 | * Sets the field's value. | |
123 | * | |
124 | * @param v the number from 1 to 9 or zero to clear the field | |
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125 | * @throws IllegalArgumentException if v is not between 0 and 9 |
10 | 126 | */ |
2 | 127 | public void setValue(int v) { |
128 | if (v == 0) { | |
129 | setText(""); | |
13 | 130 | } else if (v > 0 && v < 10) { |
2 | 131 | setText(String.valueOf(v)); |
132 | } else { | |
133 | throw new IllegalArgumentException( | |
134 | "Sudoku numbers must be in range 0-9 (0 means 'not set')"); | |
135 | } | |
136 | } | |
10 | 137 | |
138 | /** | |
139 | * Sets the modified state of this field. | |
140 | * | |
141 | * Modified fields are displayed in blue color. | |
142 | * | |
143 | * @param modified a flag indicating whether this field is modified | |
144 | */ | |
2 | 145 | public void setModified(boolean modified) { |
146 | this.modified = modified; | |
147 | setForeground(modified?Color.BLUE:Color.BLACK); | |
148 | } | |
10 | 149 | |
150 | /** | |
151 | * Checks whether this field is in modified state. | |
152 | * | |
153 | * @return true if this field is modified | |
154 | */ | |
2 | 155 | public boolean isModified() { |
156 | return modified; | |
157 | } | |
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158 | } |