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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 | ||
33 | import jexer.TApplication; | |
34 | import jexer.TKeypress; | |
35 | import jexer.TWidget; | |
36 | import jexer.TWindow; | |
37 | import jexer.bits.CellAttributes; | |
38 | import jexer.bits.GraphicsChars; | |
39 | import jexer.bits.MnemonicString; | |
40 | import jexer.event.TKeypressEvent; | |
41 | import jexer.event.TMouseEvent; | |
42 | import static jexer.TKeypress.*; | |
43 | ||
44 | /** | |
45 | * TMenu is a top-level collection of TMenuItems. | |
46 | */ | |
47 | public final class TMenu extends TWindow { | |
48 | ||
49 | /** | |
50 | * If true, this is a sub-menu. Note package private access. | |
51 | */ | |
52 | boolean isSubMenu = false; | |
53 | ||
54 | /** | |
55 | * The shortcut and title. | |
56 | */ | |
57 | private MnemonicString mnemonic; | |
58 | ||
59 | /** | |
60 | * Get the mnemonic string. | |
61 | * | |
62 | * @return the full mnemonic string | |
63 | */ | |
64 | public MnemonicString getMnemonic() { | |
65 | return mnemonic; | |
66 | } | |
67 | ||
68 | // Reserved menu item IDs | |
69 | public static final int MID_UNUSED = -1; | |
70 | ||
71 | // File menu | |
72 | public static final int MID_EXIT = 1; | |
73 | public static final int MID_QUIT = MID_EXIT; | |
74 | public static final int MID_OPEN_FILE = 2; | |
75 | public static final int MID_SHELL = 3; | |
76 | ||
77 | // Edit menu | |
78 | public static final int MID_CUT = 10; | |
79 | public static final int MID_COPY = 11; | |
80 | public static final int MID_PASTE = 12; | |
81 | public static final int MID_CLEAR = 13; | |
82 | ||
83 | // Window menu | |
84 | public static final int MID_TILE = 20; | |
85 | public static final int MID_CASCADE = 21; | |
86 | public static final int MID_CLOSE_ALL = 22; | |
87 | public static final int MID_WINDOW_MOVE = 23; | |
88 | public static final int MID_WINDOW_ZOOM = 24; | |
89 | public static final int MID_WINDOW_NEXT = 25; | |
90 | public static final int MID_WINDOW_PREVIOUS = 26; | |
91 | public static final int MID_WINDOW_CLOSE = 27; | |
92 | ||
93 | /** | |
94 | * Public constructor. | |
95 | * | |
96 | * @param parent parent application | |
97 | * @param x column relative to parent | |
98 | * @param y row relative to parent | |
99 | * @param label mnemonic menu title. Label must contain a keyboard | |
100 | * shortcut (mnemonic), denoted by prefixing a letter with "&", | |
101 | * e.g. "&File" | |
102 | */ | |
103 | public TMenu(final TApplication parent, final int x, final int y, | |
104 | final String label) { | |
105 | ||
106 | super(parent, label, x, y, parent.getScreen().getWidth(), | |
107 | parent.getScreen().getHeight()); | |
108 | ||
109 | // My parent constructor added me as a window, get rid of that | |
110 | parent.closeWindow(this); | |
111 | ||
112 | // Setup the menu shortcut | |
113 | mnemonic = new MnemonicString(label); | |
114 | setTitle(mnemonic.getRawLabel()); | |
115 | assert (mnemonic.getShortcutIdx() >= 0); | |
116 | ||
117 | // Recompute width and height to reflect an empty menu | |
118 | setWidth(getTitle().length() + 4); | |
119 | setHeight(2); | |
120 | ||
121 | setActive(false); | |
122 | } | |
123 | ||
124 | /** | |
125 | * Draw a top-level menu with title and menu items. | |
126 | */ | |
127 | @Override | |
128 | public void draw() { | |
928811d8 KL |
129 | CellAttributes background = getTheme().getColor("tmenu"); |
130 | ||
7c870d89 | 131 | assert (isAbsoluteActive()); |
928811d8 KL |
132 | |
133 | // Fill in the interior background | |
134 | for (int i = 0; i < getHeight(); i++) { | |
135 | hLineXY(0, i, getWidth(), ' ', background); | |
136 | } | |
137 | ||
138 | // Draw the box | |
139 | char cTopLeft; | |
140 | char cTopRight; | |
141 | char cBottomLeft; | |
142 | char cBottomRight; | |
143 | char cHSide; | |
144 | ||
145 | cTopLeft = GraphicsChars.ULCORNER; | |
146 | cTopRight = GraphicsChars.URCORNER; | |
147 | cBottomLeft = GraphicsChars.LLCORNER; | |
148 | cBottomRight = GraphicsChars.LRCORNER; | |
149 | cHSide = GraphicsChars.SINGLE_BAR; | |
150 | ||
151 | // Place the corner characters | |
152 | putCharXY(1, 0, cTopLeft, background); | |
153 | putCharXY(getWidth() - 2, 0, cTopRight, background); | |
154 | putCharXY(1, getHeight() - 1, cBottomLeft, background); | |
155 | putCharXY(getWidth() - 2, getHeight() - 1, cBottomRight, background); | |
156 | ||
157 | // Draw the box lines | |
158 | hLineXY(1 + 1, 0, getWidth() - 4, cHSide, background); | |
159 | hLineXY(1 + 1, getHeight() - 1, getWidth() - 4, cHSide, background); | |
160 | ||
161 | // Draw a shadow | |
162 | getScreen().drawBoxShadow(0, 0, getWidth(), getHeight()); | |
163 | } | |
164 | ||
165 | /** | |
166 | * Handle mouse button presses. | |
167 | * | |
168 | * @param mouse mouse button event | |
169 | */ | |
170 | @Override | |
171 | public void onMouseDown(final TMouseEvent mouse) { | |
172 | this.mouse = mouse; | |
928811d8 KL |
173 | |
174 | // Pass to children | |
175 | for (TWidget widget: getChildren()) { | |
176 | if (widget.mouseWouldHit(mouse)) { | |
177 | // Dispatch to this child, also activate it | |
178 | activate(widget); | |
179 | ||
180 | // Set x and y relative to the child's coordinates | |
181 | mouse.setX(mouse.getAbsoluteX() - widget.getAbsoluteX()); | |
182 | mouse.setY(mouse.getAbsoluteY() - widget.getAbsoluteY()); | |
183 | widget.handleEvent(mouse); | |
184 | return; | |
185 | } | |
186 | } | |
187 | } | |
188 | ||
189 | /** | |
190 | * Handle mouse button releases. | |
191 | * | |
192 | * @param mouse mouse button release event | |
193 | */ | |
194 | @Override | |
195 | public void onMouseUp(final TMouseEvent mouse) { | |
196 | this.mouse = mouse; | |
928811d8 KL |
197 | |
198 | // Pass to children | |
199 | for (TWidget widget: getChildren()) { | |
200 | if (widget.mouseWouldHit(mouse)) { | |
201 | // Dispatch to this child, also activate it | |
202 | activate(widget); | |
203 | ||
204 | // Set x and y relative to the child's coordinates | |
205 | mouse.setX(mouse.getAbsoluteX() - widget.getAbsoluteX()); | |
206 | mouse.setY(mouse.getAbsoluteY() - widget.getAbsoluteY()); | |
207 | widget.handleEvent(mouse); | |
208 | return; | |
209 | } | |
210 | } | |
211 | } | |
212 | ||
213 | /** | |
214 | * Handle mouse movements. | |
215 | * | |
216 | * @param mouse mouse motion event | |
217 | */ | |
218 | @Override | |
219 | public void onMouseMotion(final TMouseEvent mouse) { | |
220 | this.mouse = mouse; | |
928811d8 KL |
221 | |
222 | // See if we should activate a different menu item | |
223 | for (TWidget widget: getChildren()) { | |
7c870d89 | 224 | if ((mouse.isMouse1()) |
928811d8 KL |
225 | && (widget.mouseWouldHit(mouse)) |
226 | ) { | |
227 | // Activate this menu item | |
228 | activate(widget); | |
229 | if (widget instanceof TSubMenu) { | |
230 | ((TSubMenu) widget).dispatch(); | |
231 | } | |
232 | return; | |
233 | } | |
234 | } | |
235 | } | |
236 | ||
237 | /** | |
238 | * Handle keystrokes. | |
239 | * | |
240 | * @param keypress keystroke event | |
241 | */ | |
242 | @Override | |
243 | public void onKeypress(final TKeypressEvent keypress) { | |
244 | if (getActiveChild() != null) { | |
245 | if (getActiveChild() instanceof TSubMenu) { | |
246 | getActiveChild().onKeypress(keypress); | |
247 | return; | |
248 | } | |
249 | } | |
250 | ||
251 | if (keypress.equals(kbEsc)) { | |
252 | getApplication().closeMenu(); | |
253 | return; | |
254 | } | |
255 | if (keypress.equals(kbDown)) { | |
256 | switchWidget(true); | |
257 | return; | |
258 | } | |
259 | if (keypress.equals(kbUp)) { | |
260 | switchWidget(false); | |
261 | return; | |
262 | } | |
263 | if (keypress.equals(kbRight)) { | |
264 | if (!isSubMenu) { | |
265 | getApplication().switchMenu(true); | |
266 | } | |
267 | return; | |
268 | } | |
269 | if (keypress.equals(kbLeft)) { | |
270 | if (isSubMenu) { | |
271 | getApplication().closeSubMenu(); | |
272 | } else { | |
273 | getApplication().switchMenu(false); | |
274 | } | |
275 | return; | |
276 | } | |
277 | ||
278 | // Switch to a menuItem if it has an mnemonic | |
7c870d89 KL |
279 | if (!keypress.getKey().isFnKey() |
280 | && !keypress.getKey().isAlt() | |
281 | && !keypress.getKey().isCtrl()) { | |
928811d8 KL |
282 | for (TWidget widget: getChildren()) { |
283 | TMenuItem item = (TMenuItem) widget; | |
284 | if ((item.getMnemonic() != null) | |
285 | && (Character.toLowerCase(item.getMnemonic().getShortcut()) | |
7c870d89 | 286 | == Character.toLowerCase(keypress.getKey().getChar())) |
928811d8 KL |
287 | ) { |
288 | // Send an enter keystroke to it | |
289 | activate(item); | |
290 | item.handleEvent(new TKeypressEvent(kbEnter)); | |
291 | return; | |
292 | } | |
293 | } | |
294 | } | |
295 | ||
296 | // Dispatch the keypress to an active widget | |
297 | for (TWidget widget: getChildren()) { | |
7c870d89 | 298 | if (widget.isActive()) { |
928811d8 KL |
299 | widget.handleEvent(keypress); |
300 | return; | |
301 | } | |
302 | } | |
303 | } | |
304 | ||
305 | /** | |
306 | * Convenience function to add a custom menu item. | |
307 | * | |
308 | * @param id menu item ID. Must be greater than 1024. | |
309 | * @param label menu item label | |
310 | * @param key global keyboard accelerator | |
311 | * @return the new menu item | |
312 | */ | |
8e688b92 | 313 | public final TMenuItem addItem(final int id, final String label, |
928811d8 KL |
314 | final TKeypress key) { |
315 | ||
316 | assert (id >= 1024); | |
317 | return addItemInternal(id, label, key); | |
318 | } | |
319 | ||
320 | /** | |
321 | * Convenience function to add a custom menu item. | |
322 | * | |
323 | * @param id menu item ID. Must be greater than 1024. | |
324 | * @param label menu item label | |
325 | * @param key global keyboard accelerator | |
326 | * @return the new menu item | |
327 | */ | |
328 | private TMenuItem addItemInternal(final int id, final String label, | |
329 | final TKeypress key) { | |
330 | ||
331 | int newY = getChildren().size() + 1; | |
332 | assert (newY < getHeight()); | |
333 | ||
334 | TMenuItem menuItem = new TMenuItem(this, id, 1, newY, label); | |
335 | menuItem.setKey(key); | |
336 | setHeight(getHeight() + 1); | |
337 | if (menuItem.getWidth() + 2 > getWidth()) { | |
338 | setWidth(menuItem.getWidth() + 2); | |
339 | } | |
340 | for (TWidget widget: getChildren()) { | |
341 | widget.setWidth(getWidth() - 2); | |
342 | } | |
e826b451 | 343 | getApplication().addAccelerator(menuItem, key.toLowerCase()); |
928811d8 KL |
344 | getApplication().recomputeMenuX(); |
345 | activate(0); | |
346 | return menuItem; | |
347 | } | |
348 | ||
349 | /** | |
350 | * Convenience function to add a menu item. | |
351 | * | |
352 | * @param id menu item ID. Must be greater than 1024. | |
353 | * @param label menu item label | |
354 | * @return the new menu item | |
355 | */ | |
8e688b92 | 356 | public final TMenuItem addItem(final int id, final String label) { |
928811d8 KL |
357 | assert (id >= 1024); |
358 | return addItemInternal(id, label); | |
359 | } | |
360 | ||
361 | /** | |
362 | * Convenience function to add a menu item. | |
363 | * | |
364 | * @param id menu item ID | |
365 | * @param label menu item label | |
366 | * @return the new menu item | |
367 | */ | |
368 | private TMenuItem addItemInternal(final int id, final String label) { | |
369 | int newY = getChildren().size() + 1; | |
370 | assert (newY < getHeight()); | |
371 | ||
372 | TMenuItem menuItem = new TMenuItem(this, id, 1, newY, label); | |
373 | setHeight(getHeight() + 1); | |
374 | if (menuItem.getWidth() + 2 > getWidth()) { | |
375 | setWidth(menuItem.getWidth() + 2); | |
376 | } | |
377 | for (TWidget widget: getChildren()) { | |
378 | widget.setWidth(getWidth() - 2); | |
379 | } | |
380 | getApplication().recomputeMenuX(); | |
381 | activate(0); | |
382 | return menuItem; | |
383 | } | |
384 | ||
385 | /** | |
386 | * Convenience function to add one of the default menu items. | |
387 | * | |
388 | * @param id menu item ID. Must be between 0 (inclusive) and 1023 | |
389 | * (inclusive). | |
390 | * @return the new menu item | |
391 | */ | |
8e688b92 | 392 | public final TMenuItem addDefaultItem(final int id) { |
928811d8 KL |
393 | assert (id >= 0); |
394 | assert (id < 1024); | |
395 | ||
396 | String label; | |
397 | TKeypress key = null; | |
398 | boolean hasKey = true; | |
399 | ||
400 | switch (id) { | |
401 | ||
402 | case MID_EXIT: | |
403 | label = "E&xit"; | |
404 | key = kbAltX; | |
405 | break; | |
406 | ||
407 | case MID_SHELL: | |
408 | label = "O&S Shell"; | |
409 | hasKey = false; | |
410 | break; | |
411 | ||
412 | case MID_OPEN_FILE: | |
413 | label = "&Open"; | |
414 | key = kbAltO; | |
415 | break; | |
416 | ||
417 | case MID_CUT: | |
418 | label = "Cu&t"; | |
419 | key = kbCtrlX; | |
420 | break; | |
421 | case MID_COPY: | |
422 | label = "&Copy"; | |
423 | key = kbCtrlC; | |
424 | break; | |
425 | case MID_PASTE: | |
426 | label = "&Paste"; | |
427 | key = kbCtrlV; | |
428 | break; | |
429 | case MID_CLEAR: | |
430 | label = "C&lear"; | |
30bd4abd KL |
431 | hasKey = false; |
432 | // key = kbDel; | |
928811d8 KL |
433 | break; |
434 | ||
435 | case MID_TILE: | |
436 | label = "&Tile"; | |
437 | hasKey = false; | |
438 | break; | |
439 | case MID_CASCADE: | |
440 | label = "C&ascade"; | |
441 | hasKey = false; | |
442 | break; | |
443 | case MID_CLOSE_ALL: | |
444 | label = "Cl&ose All"; | |
445 | hasKey = false; | |
446 | break; | |
447 | case MID_WINDOW_MOVE: | |
448 | label = "&Size/Move"; | |
449 | key = kbCtrlF5; | |
450 | break; | |
451 | case MID_WINDOW_ZOOM: | |
452 | label = "&Zoom"; | |
453 | key = kbF5; | |
454 | break; | |
455 | case MID_WINDOW_NEXT: | |
456 | label = "&Next"; | |
457 | key = kbF6; | |
458 | break; | |
459 | case MID_WINDOW_PREVIOUS: | |
460 | label = "&Previous"; | |
461 | key = kbShiftF6; | |
462 | break; | |
463 | case MID_WINDOW_CLOSE: | |
464 | label = "&Close"; | |
34a42e78 KL |
465 | hasKey = false; |
466 | // key = kbCtrlW; | |
928811d8 KL |
467 | break; |
468 | ||
469 | default: | |
470 | throw new IllegalArgumentException("Invalid menu ID: " + id); | |
471 | } | |
472 | ||
473 | if (hasKey) { | |
474 | return addItemInternal(id, label, key); | |
475 | } | |
476 | return addItemInternal(id, label); | |
477 | } | |
478 | ||
479 | /** | |
480 | * Convenience function to add a menu separator. | |
481 | */ | |
8e688b92 | 482 | public final void addSeparator() { |
928811d8 KL |
483 | int newY = getChildren().size() + 1; |
484 | assert (newY < getHeight()); | |
485 | ||
cf9af8df KL |
486 | // We just have to construct it, don't need to hang onto what it |
487 | // makes. | |
488 | new TMenuSeparator(this, 1, newY); | |
928811d8 KL |
489 | setHeight(getHeight() + 1); |
490 | } | |
491 | ||
492 | /** | |
493 | * Convenience function to add a sub-menu. | |
494 | * | |
495 | * @param title menu title. Title must contain a keyboard shortcut, | |
496 | * denoted by prefixing a letter with "&", e.g. "&File" | |
497 | * @return the new sub-menu | |
498 | */ | |
8e688b92 | 499 | public final TSubMenu addSubMenu(final String title) { |
928811d8 KL |
500 | int newY = getChildren().size() + 1; |
501 | assert (newY < getHeight()); | |
502 | ||
503 | TSubMenu subMenu = new TSubMenu(this, title, 1, newY); | |
504 | setHeight(getHeight() + 1); | |
505 | if (subMenu.getWidth() + 2 > getWidth()) { | |
506 | setWidth(subMenu.getWidth() + 2); | |
507 | } | |
508 | for (TWidget widget: getChildren()) { | |
509 | widget.setWidth(getWidth() - 2); | |
510 | } | |
511 | getApplication().recomputeMenuX(); | |
512 | activate(0); | |
513 | subMenu.menu.setX(getX() + getWidth() - 2); | |
514 | ||
515 | return subMenu; | |
516 | } | |
517 | ||
518 | } |