2ee739cc |
1 | /* Title: -> c.win |
2 | * Purpose: central control of window sytem events. |
3 | * |
4 | */ |
5 | |
6 | /*----- Licensing note ----------------------------------------------------* |
7 | * |
8 | * This file is part of Straylight's Steel library. |
9 | * |
10 | * Steel is free software; you can redistribute it and/or modify |
11 | * it under the terms of the GNU General Public License as published by |
12 | * the Free Software Foundation; either version 2, or (at your option) |
13 | * any later version. |
14 | * |
15 | * Steel is distributed in the hope that it will be useful, |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
18 | * GNU General Public License for more details. |
19 | * |
20 | * You should have received a copy of the GNU General Public License |
21 | * along with Steel. If not, write to the Free Software Foundation, |
22 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
23 | */ |
24 | |
25 | #define BOOL int |
26 | #define TRUE 1 |
27 | #define FALSE 0 |
28 | #include <stdarg.h> |
29 | #include <stdlib.h> |
30 | #include <string.h> |
31 | #include <stdio.h> |
32 | |
33 | #include "trace.h" |
34 | #include "os.h" |
35 | #include "wimp.h" |
36 | #include "werr.h" |
37 | #include "wimpt.h" |
38 | #include "event.h" |
39 | #include "msgs.h" |
40 | #include "mem.h" |
41 | #include "bbc.h" |
42 | #include "swis.h" |
43 | #include "menu.h" |
44 | |
45 | #include "win.h" |
46 | |
47 | /* -------- Keeping Track of All Windows. -------- */ |
48 | |
49 | typedef struct win__str { |
50 | struct win__str *next; |
51 | struct win__str *prev; |
52 | wimp_w w; |
53 | win_event_handler proc; |
54 | void *handle; |
55 | void *menuh; |
56 | } win__str; |
57 | |
58 | #define DUD (-1) |
59 | |
60 | static win__str *win__allwindows; |
61 | |
62 | static win__str *win__find(wimp_w w) |
63 | { |
64 | win__str *ws=win__allwindows; |
65 | while (ws) |
66 | { |
67 | if (ws->w==w) |
68 | return (ws); |
69 | ws=ws->next; |
70 | } |
71 | return (0); |
72 | } |
73 | |
74 | static void win__register(wimp_w w, win_event_handler proc, void *handle) |
75 | { |
76 | BOOL new=FALSE; |
77 | win__str *ws=win__find(w); |
78 | if (ws==0) |
79 | { |
80 | new=TRUE; |
81 | if (ws=(win__str *)mem_alloc(sizeof(win__str)),ws==0) |
82 | { |
83 | werr |
84 | ( |
85 | FALSE, |
86 | msgs_lookup("winNEM:Not enough memory for new event handler.") |
87 | ); |
88 | return; |
89 | } |
90 | ws->next=win__allwindows; |
91 | ws->prev=0; |
92 | if (win__allwindows) |
93 | win__allwindows->prev=ws; |
94 | win__allwindows=ws; |
95 | ws->w=w; |
96 | } |
97 | ws->proc=proc; |
98 | ws->handle=handle; |
99 | if (new) |
100 | ws->menuh=0; |
101 | } |
102 | |
103 | static void win__discard(wimp_w w) |
104 | { |
105 | win__str *ws=win__find(w); |
106 | if (ws) |
107 | { |
108 | if (ws->menuh) |
109 | menu_attach(w,0,0,0,0); /* Try to free the menu */ |
110 | if (ws->prev) |
111 | ws->prev->next=ws->next; |
112 | else |
113 | win__allwindows=ws->next; |
114 | if (ws->next) |
115 | ws->next->prev=ws->prev; |
116 | mem_free(ws); |
117 | } |
118 | } |
119 | |
120 | BOOL win_read_eventhandler(wimp_w w,win_event_handler *p,void **handle) |
121 | { |
122 | win__str *ws=win__find(w); |
123 | if (ws) |
124 | { |
125 | *p=ws->proc; |
126 | *handle=ws->handle; |
127 | } |
128 | return (!!ws); |
129 | } |
130 | |
131 | /* -------- Claiming Events. -------- */ |
132 | |
133 | void win_register_event_handler( |
134 | wimp_w w, win_event_handler proc, void *handle) |
135 | { |
136 | if (proc == 0) { |
137 | win__discard(w); |
138 | } else { |
139 | win__register(w, proc, handle); |
140 | }; |
141 | } |
142 | |
143 | typedef struct unknown_previewer |
144 | { |
145 | struct unknown_previewer *link ; |
146 | win_unknown_event_processor proc ; |
147 | void *handle ; |
148 | } unknown_previewer ; |
149 | |
150 | typedef struct idle_receiver |
151 | { |
152 | struct idle_receiver *next; |
153 | win_idle_claimer proc; |
154 | int speed; |
155 | void *handle; |
156 | } |
157 | idle_receiver; |
158 | |
159 | static wimp_w win__idle = DUD; |
160 | #define win__unknown_flag (('U'<<24)+('N'<<16)+('K'<<8)+'N') |
161 | |
162 | static wimp_w win__unknown = DUD; |
163 | static unknown_previewer *win__unknown_previewer_list; |
164 | static idle_receiver *idleList; |
165 | static int win__minPoll=2; |
166 | |
167 | static void win__setPollingSpeed(void) |
168 | { |
169 | int s=win__minPoll; |
170 | idle_receiver *p=idleList; |
171 | while (p) |
172 | { |
173 | if (p->speed<s && p->speed!=win_DONTCARE) |
174 | s=p->speed; |
175 | p=p->next; |
176 | } |
177 | wimpt_pollingTime(s); |
178 | } |
179 | |
180 | void win_idleTime(int time) |
181 | { |
182 | win__minPoll=time; |
183 | win__setPollingSpeed(); |
184 | } |
185 | |
186 | void win_addIdleClaimer(win_idle_claimer proc,int speed,void *handle) |
187 | { |
188 | idle_receiver *new=(idle_receiver *)mem_alloc(sizeof(idle_receiver)); |
189 | if (new) |
190 | { |
191 | new->proc=proc; |
192 | new->handle=handle; |
193 | new->next=idleList; |
194 | new->speed=speed; |
195 | idleList=new; |
196 | } |
197 | win__setPollingSpeed(); |
198 | } |
199 | |
200 | BOOL win_any_idles(void) |
201 | { |
202 | return (!!idleList); |
203 | } |
204 | |
205 | void win_remove_idle_claimer(win_idle_claimer proc,void *handle) |
206 | { |
207 | idle_receiver *block ; |
208 | for (block = (idle_receiver *) &idleList ; |
209 | block->next != 0 && (block->next->proc != proc || block->next->handle != handle) ; |
210 | block = block->next) ; |
211 | if (block->next != 0) |
212 | { |
213 | idle_receiver *b2 = block->next ; |
214 | block->next = b2->next ; |
215 | mem_free(b2) ; |
216 | win__setPollingSpeed(); |
217 | } |
218 | } |
219 | |
220 | void win_claim_idle_events(wimp_w w) |
221 | { |
222 | tracef1("idle events -> %d\n",w) ; |
223 | win__idle = w; |
224 | } |
225 | |
226 | wimp_w win_idle_event_claimer(void) |
227 | { |
228 | return(win__idle); |
229 | } |
230 | |
231 | void win_claim_unknown_events(wimp_w w) |
232 | { |
233 | win__unknown = w; |
234 | } |
235 | |
236 | wimp_w win_unknown_event_claimer(void) |
237 | { |
238 | return win__unknown; |
239 | } |
240 | |
241 | void win_add_unknown_event_processor(win_unknown_event_processor p, |
242 | void *h) |
243 | { |
244 | unknown_previewer *block = mem_alloc(sizeof(unknown_previewer)) ; |
245 | if (block != 0) |
246 | { |
247 | block->link = win__unknown_previewer_list ; |
248 | block->proc = p ; |
249 | block->handle = h ; |
250 | win__unknown_previewer_list = block ; |
251 | } |
252 | } |
253 | |
254 | void win_remove_unknown_event_processor(win_unknown_event_processor p, |
255 | void *h) |
256 | { |
257 | unknown_previewer *block ; |
258 | for (block = (unknown_previewer *) &win__unknown_previewer_list ; |
259 | block != 0 && (block->link->proc != p || block->link->handle != h) ; |
260 | block = block->link) ; |
261 | if (block != 0) |
262 | { |
263 | unknown_previewer *b2 = block->link ; |
264 | block->link = b2->link ; |
265 | mem_free(b2) ; |
266 | } |
267 | } |
268 | |
269 | /* -------- Menus. -------- */ |
270 | |
271 | void win_setmenuh(wimp_w w, void *handle) |
272 | { |
273 | win__str *p = win__find(w); |
274 | if (p != 0) {p->menuh = handle;}; |
275 | } |
276 | |
277 | void *win_getmenuh(wimp_w w) /* 0 if not set */ |
278 | { |
279 | win__str *p = win__find(w); |
280 | return(p==0 ? 0 : p->menuh); |
281 | } |
282 | |
283 | /* -------- Processing Events. -------- */ |
284 | |
285 | /* |
286 | * void win_broadcast(wimp_eventstr *e) |
287 | * |
288 | * Use |
289 | * Broadcasts the given event to ALL windows currently active. Note: this |
290 | * works in a similar way to module service calls - a broadcast can be |
291 | * 'claimed' by changing it to a null event. This is most useful for |
292 | * informing other windows about events (such as a parent window being |
293 | * closed), and thus message broadcasts should be used. |
294 | * |
295 | * Parameters |
296 | * wimp_eventstr *e == the event to broadcast. |
297 | */ |
298 | |
299 | void win_broadcast(wimp_eventstr *e) |
300 | { |
301 | win__str *p=win__allwindows; |
302 | win__str *q; |
303 | while (p) |
304 | { |
305 | q=p; |
306 | p=p->next; |
307 | (q->proc)(e,q->handle); |
308 | } |
309 | } |
310 | |
311 | BOOL win_processevent(wimp_eventstr *e) |
312 | { |
313 | /* --- Houston, we have a problem --- * |
314 | * |
315 | * Event handlers can continue over several polls, unlike Sapphire where |
316 | * this sort of convolution is limited to coroutines. Our lists of |
317 | * handlers can become `stale' by the time the previous one finishes, |
318 | * if we're not careful. We bodge around the problem (bloody Acorn :-( ) |
319 | * by keeping a static serial number, and a local copy. If the two don't |
320 | * match, we declare `stale!' and refuse to process any more events. |
321 | */ |
322 | |
323 | |
324 | static int serial; |
325 | int cserial=++serial; |
326 | |
327 | wimp_w w; |
328 | win__str *p; |
329 | os_regset r; |
330 | wimp_wstate s; |
331 | tracef1("win_processevent %i.\n", e->e); |
332 | switch (e->e) { |
333 | case wimp_ENULL: |
334 | { |
335 | idle_receiver *idles=idleList; |
336 | idle_receiver *next; |
337 | while (idles && cserial==serial) /* Avoid staleness of lists */ |
338 | { |
339 | next=idles->next; |
340 | (idles->proc)(idles->handle); |
341 | idles=next; |
342 | } |
343 | } |
344 | w = win__idle; |
345 | break; |
346 | case wimp_EUSERDRAG: |
347 | w = win__unknown_flag ; |
348 | if (wimpt_getVersion()>=300) |
349 | os_swix(XDragASprite_Stop,&r); |
350 | break; |
351 | case wimp_EOPEN: |
352 | wimpt_noerr(wimp_get_wind_state(e->data.o.w,&s)); |
353 | if (wimpt_justChangedMode() || (s.flags & wimp_WCLICK_TOGGLE)) |
354 | win_adjustBox(&e->data.o); |
355 | /* And continue... */ |
356 | case wimp_EREDRAW: case wimp_ECLOSE: |
357 | case wimp_EPTRLEAVE: case wimp_EPTRENTER: case wimp_EKEY: |
358 | case wimp_ESCROLL: |
359 | w = e->data.o.w; |
360 | break; |
361 | case wimp_EBUT: |
362 | w = e->data.but.m.w; |
363 | if (w <= (wimp_w) -1) w = win_ICONBAR; |
364 | if (wimpt_options() & wimpt_ONOWIMPSHADE) |
365 | { |
366 | wimp_icon icn; |
367 | wimpt_noerr(wimp_get_icon_info(e->data.but.m.w,e->data.but.m.i,&icn)); |
368 | if ((icn.flags & 0x001f0000) == 0x001f0000) |
369 | e->data.but.m.i=-1; |
370 | } |
371 | break; |
372 | case wimp_ESEND: |
373 | case wimp_ESENDWANTACK: |
374 | switch (e->data.msg.hdr.action) { |
375 | case wimp_MCLOSEDOWN: |
376 | tracef0("closedown message\n"); |
377 | exit(0); |
378 | case wimp_MDATALOAD: |
379 | case wimp_MDATASAVE: |
380 | tracef1("data %s message arriving.\n", |
381 | (int) (e->data.msg.hdr.action==wimp_MDATASAVE ? "save" : "load")); |
382 | if (e->data.msg.data.dataload.w < 0) |
383 | { |
384 | tracef0("data message to the icon bar.\n"); |
385 | w = win_ICONBARLOAD ; |
386 | } else { |
387 | w = e->data.msg.data.dataload.w; |
388 | }; |
389 | break; |
390 | case wimp_MHELPREQUEST: |
391 | tracef1("help request for window %i.\n", e->data.msg.data.helprequest.m.w); |
392 | w = e->data.msg.data.helprequest.m.w; |
393 | if (w < 0) w = win_ICONBARLOAD; |
394 | break; |
395 | default: |
396 | tracef1("unknown message type %i arriving.\n", e->data.msg.hdr.action); |
397 | w = win__unknown_flag; |
398 | if (w < 0) w = win_ICONBARLOAD; |
399 | }; |
400 | break; |
401 | default: |
402 | w = win__unknown_flag; |
403 | }; |
404 | |
405 | if (w==win__unknown_flag || win__find(w) == 0) |
406 | { |
407 | unknown_previewer *pr=win__unknown_previewer_list; |
408 | unknown_previewer *next; |
409 | while (pr != 0 && cserial==serial) /* Avoid staleness of lists */ |
410 | { |
411 | next=pr->link; |
412 | if (pr->proc(e, pr->handle)) return TRUE ; |
413 | pr=next; |
414 | } |
415 | w = win__unknown ; |
416 | } |
417 | |
418 | p = (w == DUD ? 0 : win__find(w)); |
419 | if (p != 0) { |
420 | p->proc(e, p->handle); |
421 | return TRUE; |
422 | } else { |
423 | return FALSE; |
424 | }; |
425 | } |
426 | |
427 | /* -------- Termination. -------- */ |
428 | |
429 | static int win__active; |
430 | |
431 | void win_activeinc(void) |
432 | { |
433 | win__active++; |
434 | } |
435 | |
436 | void win_activedec(void) |
437 | { |
438 | win__active--; |
439 | } |
440 | |
441 | int win_activeno(void) |
442 | { |
443 | return win__active; |
444 | } |
445 | |
446 | /* -------- Giving away the caret. -------- */ |
447 | |
448 | void win_give_away_caret(void) |
449 | { |
450 | win__str *ws=win__allwindows; |
451 | while (ws) { |
452 | if (ws->w != DUD) { /* found a window */ |
453 | wimp_wstate s; |
454 | wimp_eventstr e; |
455 | tracef1("get state of window %i.", ws->w); |
456 | (void) wimp_get_wind_state(ws->w, &s); |
457 | tracef2("behind=%i flags=%i.\n", s.o.behind, s.flags); |
458 | if (s.o.behind == DUD && (s.flags & wimp_WOPEN) != 0) { |
459 | /* w is the top window */ |
460 | /* if it wants the caret, it will grab it. */ |
461 | tracef0("Opening it.\n"); |
462 | e.e = wimp_EOPEN; |
463 | e.data.o = s.o; |
464 | wimpt_fake_event(&e); |
465 | break; |
466 | }; |
467 | }; |
468 | ws=ws->next; |
469 | }; |
470 | } |
471 | |
472 | /* ----------- setting a window title ------------ */ |
473 | |
474 | void win_settitle(wimp_w w, char *newtitle,...) |
475 | { |
476 | wimp_redrawstr r; |
477 | va_list ap; |
478 | wimp_winfo *winfo; |
479 | |
480 | va_start(ap,newtitle); |
481 | if((winfo = mem_alloc(sizeof(wimp_wind) + 200*sizeof(wimp_icon))) == 0) |
482 | { |
483 | werr(FALSE, msgs_lookup("win2:Not enough memory to change window title.")); |
484 | va_end(ap); |
485 | return; |
486 | } |
487 | |
488 | tracef1("New title is %s\n", (int)newtitle); |
489 | /* --- get the window's details --- */ |
490 | winfo->w = w; |
491 | wimpt_noerr(wimp_get_wind_info(winfo)); |
492 | |
493 | /* --- put the new title string in the title icon's buffer --- */ |
494 | tracef1("Lib buffer is at %d\n", (int)winfo->info.title.indirecttext.buffer); |
495 | vsprintf(winfo->info.title.indirecttext.buffer, newtitle, ap); |
496 | va_end(ap); |
497 | |
498 | /* --- invalidate the title bar in absolute coords --- */ |
499 | if (winfo->info.flags & wimp_WOPEN) |
500 | { |
501 | r.w = (wimp_w) -1; /* absolute screen coords */ |
502 | r.box = winfo->info.box; |
503 | r.box.y1 += 36; /* yuk - tweaky */ |
504 | r.box.y0 = r.box.y1 - 36; |
505 | wimpt_noerr(wimp_force_redraw(&r)); |
506 | } |
507 | |
508 | /* --- free space used to window info --- */ |
509 | mem_free(winfo); |
510 | } |
511 | |
512 | /* |
513 | * void win_gadgetWidths(wimp_wflags f,wimp_box *b) |
514 | * |
515 | * Use |
516 | * Returns a box giving the width of the system area around a window with |
517 | * window flags f. |
518 | */ |
519 | |
520 | void win_gadgetWidths(wimp_wflags f,wimp_box *b) |
521 | { |
522 | wimp_wind w= |
523 | { |
524 | {-500,-500,-300,-300},0,0,-1, |
525 | 0, |
526 | {7,2,7,1,3,1,12}, |
527 | {0,0,100,100}, |
528 | 0, |
529 | 0, |
530 | (void *)1, |
531 | 0, |
532 | {"anywindow"}, |
533 | 0 |
534 | }; |
535 | wimp_w temp; |
536 | wimp_wstate s; |
537 | wimp_redrawstr r; |
538 | |
539 | w.flags=f | wimp_WTRESPASS; |
540 | if (wimp_create_wind(&w,&temp)) |
541 | { |
542 | b->x0=0; |
543 | b->x1=(f & wimp_WHSCR) ? 40 : 0; |
544 | b->y0=(f & wimp_WVSCR) ? 40 : 0; |
545 | b->y1=(f & wimp_WTITLE) ? 40 : 0; |
546 | } |
547 | else |
548 | { |
549 | wimpt_noerr(wimp_get_wind_state(temp,&s)); |
550 | wimpt_noerr(wimp_open_wind(&s.o)); |
551 | wimpt_noerr(wimp_get_wind_state(temp,&s)); |
552 | r.w=temp; |
553 | wimpt_noerr(wimp_getwindowoutline(&r)); |
554 | b->x0=s.o.box.x0-r.box.x0; |
555 | b->x1=r.box.x1-s.o.box.x1; |
556 | b->y1=r.box.y1-s.o.box.y1; |
557 | b->y0=s.o.box.y0-r.box.y0; |
558 | wimpt_noerr(wimp_delete_wind(temp)); |
559 | } |
560 | } |
561 | |
562 | /* |
563 | * void win_adjustBox(wimp_openstr *o) |
564 | * |
565 | * Use |
566 | * Adjusts a window so that it fits on the screen. |
567 | * |
568 | * Parameters |
569 | * wimp_openstr *o == pointer to the block to fiddle |
570 | */ |
571 | |
572 | void win_adjustBox(wimp_openstr *o) |
573 | { |
574 | int scx=wimpt_scwidth(); |
575 | int scy=wimpt_scheight(); |
576 | int w=o->box.x1-o->box.x0; |
577 | int h=o->box.y1-o->box.y0; |
578 | wimp_box b; |
579 | wimp_wstate s; |
580 | wimpt_noerr(wimp_get_wind_state(o->w,&s)); |
581 | win_gadgetWidths(s.flags,&b); |
582 | |
583 | if (o->box.x1-o->box.x0>scx-b.x0-b.x1) |
584 | { |
585 | o->box.x0=b.x0; |
586 | o->box.x1=scx-b.x1; |
587 | } |
588 | else if (o->box.x1>scx-b.x1) |
589 | { |
590 | o->box.x1=scx-b.x1; |
591 | o->box.x0=scx-b.x1-w; |
592 | } |
593 | else if (o->box.x0<b.x0) |
594 | { |
595 | o->box.x0=b.x0; |
596 | o->box.x1=b.x0+w; |
597 | } |
598 | |
599 | if (o->box.y1-o->box.y0>scy-b.y0-b.y1) |
600 | { |
601 | o->box.y0=b.y0; |
602 | o->box.y1=scy-b.y1; |
603 | } |
604 | else if (o->box.y1>scy-b.y1) |
605 | { |
606 | o->box.y1=scy-b.y1; |
607 | o->box.y0=scy-b.y1-h; |
608 | } |
609 | else if (o->box.y0<b.y0) |
610 | { |
611 | o->box.y0=b.y0; |
612 | o->box.y1=b.y0+h; |
613 | } |
614 | } |
615 | |
616 | /* |
617 | * BOOL win_anyWindows(void) |
618 | * |
619 | * Use |
620 | * Informs the caller if there are any windows left. |
621 | * |
622 | * Returns |
623 | * TRUE if there are. |
624 | */ |
625 | |
626 | BOOL win_anyWindows(void) |
627 | { |
628 | wimp_wind w= |
629 | { |
630 | {0,0,10,10},0,0,-1, |
631 | 0, |
632 | {7,2,7,1,3,1,12}, |
633 | {0,0,10,10}, |
634 | 0, |
635 | 0, |
636 | (void *)1, |
637 | 0, |
638 | {"anywindow"}, |
639 | 0 |
640 | }; |
641 | os_error *err; |
642 | wimp_w handle; |
643 | err=wimp_create_wind(&w,&handle); |
644 | if (err) |
645 | return (FALSE); |
646 | else |
647 | { |
648 | wimp_delete_wind(handle); |
649 | return (TRUE); |
650 | } |
651 | } |
652 | |
653 | /* end */ |