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928811d8 KL |
1 | /** |
2 | * Jexer - Java Text User Interface | |
3 | * | |
4 | * License: LGPLv3 or later | |
5 | * | |
6 | * This module is licensed under the GNU Lesser General Public License | |
7 | * Version 3. Please see the file "COPYING" in this directory for more | |
8 | * information about the GNU Lesser General Public License Version 3. | |
9 | * | |
10 | * Copyright (C) 2015 Kevin Lamonte | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or | |
13 | * modify it under the terms of the GNU Lesser General Public License | |
14 | * as published by the Free Software Foundation; either version 3 of | |
15 | * the License, or (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU Lesser General Public | |
23 | * License along with this program; if not, see | |
24 | * http://www.gnu.org/licenses/, or write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
26 | * 02110-1301 USA | |
27 | * | |
28 | * @author Kevin Lamonte [kevin.lamonte@gmail.com] | |
29 | * @version 1 | |
30 | */ | |
31 | package jexer.menu; | |
32 | ||
8e688b92 | 33 | import jexer.TKeypress; |
928811d8 KL |
34 | import jexer.TWidget; |
35 | import jexer.bits.CellAttributes; | |
36 | import jexer.bits.GraphicsChars; | |
37 | import jexer.event.TKeypressEvent; | |
38 | import static jexer.TKeypress.*; | |
39 | ||
40 | /** | |
41 | * TSubMenu is a special case menu item that wraps another TMenu. | |
42 | */ | |
2b9c27db | 43 | public final class TSubMenu extends TMenuItem { |
928811d8 KL |
44 | |
45 | /** | |
46 | * The menu window. Note package private access. | |
47 | */ | |
48 | TMenu menu; | |
49 | ||
50 | /** | |
51 | * Package private constructor. | |
52 | * | |
53 | * @param parent parent widget | |
54 | * @param title menu title. Title must contain a keyboard shortcut, | |
55 | * denoted by prefixing a letter with "&", e.g. "&File" | |
56 | * @param x column relative to parent | |
57 | * @param y row relative to parent | |
58 | */ | |
59 | TSubMenu(final TMenu parent, final String title, final int x, final int y) { | |
60 | super(parent, TMenu.MID_UNUSED, x, y, title); | |
61 | ||
62 | setActive(false); | |
63 | setEnabled(true); | |
64 | ||
65 | this.menu = new TMenu(parent.getApplication(), x, getAbsoluteY() - 1, | |
66 | title); | |
67 | setWidth(menu.getWidth() + 2); | |
68 | ||
69 | this.menu.isSubMenu = true; | |
70 | } | |
71 | ||
72 | /** | |
73 | * Draw the menu title. | |
74 | */ | |
75 | @Override | |
76 | public void draw() { | |
77 | super.draw(); | |
78 | ||
928811d8 | 79 | CellAttributes menuColor; |
7c870d89 | 80 | if (isAbsoluteActive()) { |
928811d8 | 81 | menuColor = getTheme().getColor("tmenu.highlighted"); |
928811d8 | 82 | } else { |
7c870d89 | 83 | if (isEnabled()) { |
928811d8 | 84 | menuColor = getTheme().getColor("tmenu"); |
928811d8 KL |
85 | } else { |
86 | menuColor = getTheme().getColor("tmenu.disabled"); | |
928811d8 KL |
87 | } |
88 | } | |
89 | ||
90 | // Add the arrow | |
91 | getScreen().putCharXY(getWidth() - 2, 0, GraphicsChars.CP437[0x10], | |
92 | menuColor); | |
93 | } | |
94 | ||
95 | /** | |
96 | * Handle keystrokes. | |
97 | * | |
98 | * @param keypress keystroke event | |
99 | */ | |
100 | @Override | |
101 | public void onKeypress(final TKeypressEvent keypress) { | |
102 | ||
7c870d89 | 103 | if (menu.isActive()) { |
928811d8 KL |
104 | menu.onKeypress(keypress); |
105 | return; | |
106 | } | |
107 | ||
108 | if (keypress.equals(kbEnter)) { | |
109 | dispatch(); | |
110 | return; | |
111 | } | |
112 | ||
113 | if (keypress.equals(kbRight)) { | |
114 | dispatch(); | |
115 | return; | |
116 | } | |
117 | ||
118 | if (keypress.equals(kbDown)) { | |
119 | getParent().switchWidget(true); | |
120 | return; | |
121 | } | |
122 | ||
123 | if (keypress.equals(kbUp)) { | |
124 | getParent().switchWidget(false); | |
125 | return; | |
126 | } | |
127 | ||
128 | if (keypress.equals(kbLeft)) { | |
129 | TMenu parentMenu = (TMenu) getParent(); | |
130 | if (parentMenu.isSubMenu) { | |
131 | getApplication().closeSubMenu(); | |
132 | } else { | |
133 | getApplication().switchMenu(false); | |
134 | } | |
135 | return; | |
136 | } | |
137 | ||
138 | if (keypress.equals(kbEsc)) { | |
139 | getApplication().closeMenu(); | |
140 | return; | |
141 | } | |
142 | } | |
143 | ||
144 | /** | |
145 | * Override dispatch() to do nothing. | |
146 | */ | |
147 | @Override | |
148 | public void dispatch() { | |
7c870d89 KL |
149 | assert (isEnabled()); |
150 | if (isAbsoluteActive()) { | |
151 | if (!menu.isActive()) { | |
928811d8 KL |
152 | getApplication().addSubMenu(menu); |
153 | menu.setActive(true); | |
154 | } | |
155 | } | |
156 | } | |
157 | ||
158 | /** | |
159 | * Returns my active widget. | |
160 | * | |
161 | * @return widget that is active, or this if no children | |
162 | */ | |
163 | @Override | |
164 | public TWidget getActiveChild() { | |
7c870d89 | 165 | if (menu.isActive()) { |
928811d8 KL |
166 | return menu; |
167 | } | |
168 | // Menu not active, return me | |
169 | return this; | |
170 | } | |
171 | ||
8e688b92 KL |
172 | /** |
173 | * Convenience function to add a custom menu item. | |
174 | * | |
175 | * @param id menu item ID. Must be greater than 1024. | |
176 | * @param label menu item label | |
177 | * @param key global keyboard accelerator | |
178 | * @return the new menu item | |
179 | */ | |
2b9c27db | 180 | public TMenuItem addItem(final int id, final String label, |
8e688b92 KL |
181 | final TKeypress key) { |
182 | ||
183 | return menu.addItem(id, label, key); | |
184 | } | |
185 | ||
186 | /** | |
187 | * Convenience function to add a menu item. | |
188 | * | |
189 | * @param id menu item ID. Must be greater than 1024. | |
190 | * @param label menu item label | |
191 | * @return the new menu item | |
192 | */ | |
2b9c27db | 193 | public TMenuItem addItem(final int id, final String label) { |
8e688b92 KL |
194 | return menu.addItem(id, label); |
195 | } | |
196 | ||
197 | /** | |
198 | * Convenience function to add one of the default menu items. | |
199 | * | |
200 | * @param id menu item ID. Must be between 0 (inclusive) and 1023 | |
201 | * (inclusive). | |
202 | * @return the new menu item | |
203 | */ | |
2b9c27db | 204 | public TMenuItem addDefaultItem(final int id) { |
8e688b92 KL |
205 | return menu.addDefaultItem(id); |
206 | } | |
207 | ||
208 | /** | |
209 | * Convenience function to add a menu separator. | |
210 | */ | |
2b9c27db | 211 | public void addSeparator() { |
8e688b92 KL |
212 | menu.addSeparator(); |
213 | } | |
214 | ||
215 | /** | |
216 | * Convenience function to add a sub-menu. | |
217 | * | |
218 | * @param title menu title. Title must contain a keyboard shortcut, | |
219 | * denoted by prefixing a letter with "&", e.g. "&File" | |
220 | * @return the new sub-menu | |
221 | */ | |
2b9c27db | 222 | public TSubMenu addSubMenu(final String title) { |
8e688b92 KL |
223 | return menu.addSubMenu(title); |
224 | } | |
225 | ||
226 | ||
928811d8 | 227 | } |