428
|
1 /* scrollbar implementation -- X interface.
|
|
2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
|
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3 Copyright (C) 1994 Amdahl Corporation.
|
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4 Copyright (C) 1995 Sun Microsystems, Inc.
|
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5 Copyright (C) 1995 Darrell Kindred <dkindred+@cmu.edu>.
|
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6
|
|
7 This file is part of XEmacs.
|
|
8
|
|
9 XEmacs is free software; you can redistribute it and/or modify it
|
|
10 under the terms of the GNU General Public License as published by the
|
|
11 Free Software Foundation; either version 2, or (at your option) any
|
|
12 later version.
|
|
13
|
|
14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
|
|
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
|
17 for more details.
|
|
18
|
|
19 You should have received a copy of the GNU General Public License
|
|
20 along with XEmacs; see the file COPYING. If not, write to
|
|
21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
22 Boston, MA 02111-1307, USA. */
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|
23
|
|
24 /* Synched up with: Not in FSF. */
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25
|
442
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26 /* This file Mule-ized (more like Mule-verified) by Ben Wing, 7-8-00. */
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27
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428
|
28 #include <config.h>
|
|
29 #include "lisp.h"
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30
|
872
|
31 #include "device-impl.h"
|
|
32 #include "frame-impl.h"
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800
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33 #include "window.h"
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34
|
872
|
35 #include "console-x-impl.h"
|
428
|
36 #include "glyphs-x.h"
|
|
37 #include "gui-x.h"
|
|
38 #include "scrollbar-x.h"
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39
|
800
|
40 #include "EmacsFrame.h"
|
428
|
41
|
|
42 static void x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
43 XtPointer client_data);
|
|
44 static void x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
45 XtPointer client_data);
|
|
46
|
|
47 /* Used to prevent changing the size of the slider while drag
|
|
48 scrolling, under Motif. This is necessary because the Motif
|
|
49 scrollbar is incredibly stupid about updating the slider and causes
|
|
50 lots of flicker if it is done too often. */
|
|
51 static int inhibit_slider_size_change;
|
|
52 int stupid_vertical_scrollbar_drag_hack;
|
|
53
|
|
54 /* Doesn't work with athena */
|
|
55 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
56 static int vertical_drag_in_progress;
|
|
57 #endif
|
|
58
|
|
59
|
|
60 /* A device method. */
|
|
61 static int
|
|
62 x_inhibit_scrollbar_slider_size_change (void)
|
|
63 {
|
|
64 /* Doesn't work with Athena */
|
|
65 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
66 return inhibit_slider_size_change;
|
|
67 #else
|
|
68 return 0;
|
|
69 #endif
|
|
70 }
|
|
71
|
|
72 /* A device method. */
|
|
73 static void
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|
74 x_free_scrollbar_instance (struct scrollbar_instance *instance)
|
|
75 {
|
|
76 if (SCROLLBAR_X_NAME (instance))
|
|
77 xfree (SCROLLBAR_X_NAME (instance));
|
|
78
|
|
79 if (SCROLLBAR_X_WIDGET (instance))
|
|
80 {
|
|
81 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
|
|
82 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
|
|
83
|
|
84 lw_destroy_all_widgets (SCROLLBAR_X_ID (instance));
|
|
85 }
|
|
86
|
|
87 if (instance->scrollbar_data)
|
|
88 xfree (instance->scrollbar_data);
|
|
89 }
|
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90
|
|
91 /* A device method. */
|
|
92 static void
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|
93 x_release_scrollbar_instance (struct scrollbar_instance *instance)
|
|
94 {
|
|
95 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
|
|
96 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
|
|
97 }
|
|
98
|
|
99 /* A device method. */
|
|
100 static void
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101 x_create_scrollbar_instance (struct frame *f, int vertical,
|
|
102 struct scrollbar_instance *instance)
|
|
103 {
|
|
104 char buffer[32];
|
|
105
|
|
106 /* initialize the X specific data section. */
|
|
107 instance->scrollbar_data = xnew_and_zero (struct x_scrollbar_data);
|
|
108
|
|
109 SCROLLBAR_X_ID (instance) = new_lwlib_id ();
|
|
110 sprintf (buffer, "scrollbar_%d", SCROLLBAR_X_ID (instance));
|
|
111 SCROLLBAR_X_NAME (instance) = xstrdup (buffer);
|
|
112 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
|
|
113 defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
114 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = -1;
|
|
115 #endif
|
|
116
|
|
117 if (vertical)
|
|
118 {
|
|
119 SCROLLBAR_X_WIDGET (instance) =
|
|
120 lw_create_widget ("vertical-scrollbar", SCROLLBAR_X_NAME (instance),
|
|
121 SCROLLBAR_X_ID (instance),
|
|
122 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
|
|
123 x_update_vertical_scrollbar_callback, NULL, NULL);
|
|
124 }
|
|
125 else
|
|
126 {
|
|
127 SCROLLBAR_X_WIDGET (instance) =
|
|
128 lw_create_widget ("horizontal-scrollbar", SCROLLBAR_X_NAME (instance),
|
|
129 SCROLLBAR_X_ID (instance),
|
|
130 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
|
|
131 x_update_horizontal_scrollbar_callback, NULL, NULL);
|
|
132 }
|
|
133 }
|
|
134
|
|
135 #define UPDATE_DATA_FIELD(field) \
|
|
136 if (new_##field >= 0 && \
|
|
137 SCROLLBAR_X_POS_DATA (inst).field != new_##field) { \
|
|
138 SCROLLBAR_X_POS_DATA (inst).field = new_##field; \
|
|
139 inst->scrollbar_instance_changed = 1; \
|
|
140 }
|
|
141
|
|
142 /* A device method. */
|
|
143 /* #### The -1 check is such a hack. */
|
|
144 static void
|
|
145 x_update_scrollbar_instance_values (struct window *w,
|
|
146 struct scrollbar_instance *inst,
|
|
147 int new_line_increment,
|
|
148 int new_page_increment,
|
|
149 int new_minimum, int new_maximum,
|
|
150 int new_slider_size,
|
|
151 int new_slider_position,
|
|
152 int new_scrollbar_width,
|
|
153 int new_scrollbar_height,
|
|
154 int new_scrollbar_x, int new_scrollbar_y)
|
|
155 {
|
|
156 UPDATE_DATA_FIELD (line_increment);
|
|
157 UPDATE_DATA_FIELD (page_increment);
|
|
158 UPDATE_DATA_FIELD (minimum);
|
|
159 UPDATE_DATA_FIELD (maximum);
|
|
160 UPDATE_DATA_FIELD (slider_size);
|
|
161 UPDATE_DATA_FIELD (slider_position);
|
|
162 UPDATE_DATA_FIELD (scrollbar_width);
|
|
163 UPDATE_DATA_FIELD (scrollbar_height);
|
|
164 UPDATE_DATA_FIELD (scrollbar_x);
|
|
165 UPDATE_DATA_FIELD (scrollbar_y);
|
|
166
|
|
167 /* This doesn't work with Athena, why? */
|
|
168 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
169 if (w && !vertical_drag_in_progress)
|
|
170 {
|
|
171 int new_vov = SCROLLBAR_X_POS_DATA (inst).slider_position;
|
|
172 int new_vows = marker_position (w->start[CURRENT_DISP]);
|
|
173
|
|
174 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) != new_vov)
|
|
175 {
|
|
176 SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) = new_vov;
|
|
177 inst->scrollbar_instance_changed = 1;
|
|
178 }
|
|
179 if (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
|
|
180 {
|
|
181 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
|
|
182 inst->scrollbar_instance_changed = 1;
|
|
183 }
|
|
184 }
|
|
185 #endif
|
|
186 }
|
|
187
|
|
188 /* Used by x_update_scrollbar_instance_status. */
|
|
189 static void
|
|
190 update_one_scrollbar_bs (struct frame *f, Widget sb_widget)
|
|
191 {
|
|
192 Boolean use_backing_store;
|
|
193
|
|
194 Xt_GET_VALUE (FRAME_X_TEXT_WIDGET (f), XtNuseBackingStore, &use_backing_store);
|
|
195
|
|
196 if (use_backing_store && sb_widget)
|
|
197 {
|
|
198 unsigned long mask = CWBackingStore;
|
|
199 XSetWindowAttributes attrs;
|
|
200
|
|
201 attrs.backing_store = Always;
|
|
202 XChangeWindowAttributes (XtDisplay (sb_widget),
|
|
203 XtWindow (sb_widget),
|
|
204 mask,
|
|
205 &attrs);
|
|
206 }
|
|
207 }
|
|
208
|
|
209 /* Create a widget value structure for passing down to lwlib so that
|
|
210 it can update the scrollbar widgets. Used by
|
|
211 x_update_scrollbar_instance_status. */
|
|
212 static widget_value *
|
|
213 scrollbar_instance_to_widget_value (struct scrollbar_instance *instance)
|
|
214 {
|
|
215 widget_value *wv;
|
|
216
|
|
217 wv = xmalloc_widget_value ();
|
|
218 /* #### maybe should add malloc_scrollbar_values to resource these? */
|
|
219 wv->scrollbar_data = xnew (scrollbar_values);
|
|
220
|
|
221 wv->name = SCROLLBAR_X_NAME (instance);
|
436
|
222 wv->name = xstrdup (wv->name);
|
428
|
223 wv->value = 0;
|
|
224 wv->key = 0;
|
|
225 wv->enabled = instance->scrollbar_is_active;
|
|
226 wv->selected = 0;
|
|
227 wv->call_data = NULL;
|
|
228
|
|
229 *wv->scrollbar_data = SCROLLBAR_X_POS_DATA (instance);
|
|
230
|
|
231 wv->next = NULL;
|
|
232
|
|
233 return wv;
|
|
234 }
|
|
235
|
|
236 /* Used by x_update_scrollbar_instance_status. */
|
|
237 static void
|
|
238 update_one_widget_scrollbar_pointer (struct window *w, Widget wid)
|
|
239 {
|
|
240 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
|
|
241 {
|
|
242 XDefineCursor (XtDisplay (wid), XtWindow (wid),
|
|
243 XIMAGE_INSTANCE_X_CURSOR (w->scrollbar_pointer));
|
|
244 XSync (XtDisplay (wid), False);
|
|
245 }
|
|
246 }
|
|
247
|
|
248 /* A device method. */
|
|
249 static void
|
|
250 x_update_scrollbar_instance_status (struct window *w, int active, int size,
|
|
251 struct scrollbar_instance *instance)
|
|
252 {
|
|
253 struct frame *f = XFRAME (w->frame);
|
|
254 Boolean managed = XtIsManaged (SCROLLBAR_X_WIDGET (instance));
|
|
255
|
|
256 if (active && size)
|
|
257 {
|
|
258 widget_value *wv = scrollbar_instance_to_widget_value (instance);
|
|
259
|
|
260 if (instance->scrollbar_instance_changed)
|
|
261 {
|
|
262 lw_modify_all_widgets (SCROLLBAR_X_ID (instance), wv, 0);
|
|
263 instance->scrollbar_instance_changed = 0;
|
|
264 }
|
|
265
|
|
266 if (!managed)
|
|
267 {
|
|
268 XtManageChild (SCROLLBAR_X_WIDGET (instance));
|
|
269 if (XtWindow (SCROLLBAR_X_WIDGET (instance)))
|
|
270 {
|
|
271 /* Raise this window so that it's visible on top of the
|
|
272 text window below it. */
|
|
273 XRaiseWindow (XtDisplay (SCROLLBAR_X_WIDGET (instance)),
|
|
274 XtWindow (SCROLLBAR_X_WIDGET (instance)));
|
|
275 update_one_widget_scrollbar_pointer
|
|
276 (w, SCROLLBAR_X_WIDGET (instance));
|
|
277 if (!SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance))
|
|
278 {
|
|
279 update_one_scrollbar_bs (f, SCROLLBAR_X_WIDGET (instance));
|
|
280 SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance) = 1;
|
|
281 }
|
|
282 }
|
|
283 }
|
|
284
|
|
285 if (!wv->scrollbar_data) abort ();
|
436
|
286 free_widget_value_tree (wv);
|
428
|
287 }
|
|
288 else if (managed)
|
|
289 {
|
|
290 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
291 /* This isn't needed with Athena Scrollbars. It might not be needed */
|
|
292 /* with Motif scrollbars (it is apparently needed with Lesstif). */
|
|
293 XtUngrabKeyboard (SCROLLBAR_X_WIDGET (instance), CurrentTime);
|
|
294 #endif
|
|
295 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
|
|
296 }
|
|
297 }
|
|
298
|
|
299 enum x_scrollbar_loop
|
|
300 {
|
|
301 X_FIND_SCROLLBAR_WINDOW_MIRROR,
|
|
302 X_SET_SCROLLBAR_POINTER,
|
|
303 X_WINDOW_IS_SCROLLBAR,
|
|
304 X_UPDATE_FRAME_SCROLLBARS
|
|
305 };
|
|
306
|
|
307 static struct window_mirror *
|
|
308 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
|
|
309 struct window_mirror *mir,
|
|
310 LWLIB_ID id, Window x_win)
|
|
311 {
|
|
312 struct window_mirror *retval = NULL;
|
|
313
|
|
314 while (mir)
|
|
315 {
|
|
316 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
|
|
317 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
|
|
318 struct window *w = XWINDOW (window);
|
|
319
|
|
320 if (mir->vchild)
|
|
321 retval = x_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
|
|
322 else if (mir->hchild)
|
|
323 retval = x_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
|
|
324 if (retval)
|
|
325 return retval;
|
|
326
|
|
327 if (hinstance || vinstance)
|
|
328 {
|
|
329 switch (type)
|
|
330 {
|
|
331 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
|
|
332 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id) ||
|
|
333 (hinstance && SCROLLBAR_X_ID (hinstance) == id))
|
|
334 return mir;
|
|
335 break;
|
|
336 case X_UPDATE_FRAME_SCROLLBARS:
|
|
337 if (!mir->vchild && !mir->hchild)
|
|
338 update_window_scrollbars (w, mir, 1, 0);
|
|
339 break;
|
|
340 case X_SET_SCROLLBAR_POINTER:
|
|
341 if (!mir->vchild && !mir->hchild)
|
|
342 {
|
|
343 Widget widget;
|
|
344
|
|
345 widget = SCROLLBAR_X_WIDGET (hinstance);
|
|
346 if (widget && XtIsManaged (widget))
|
|
347 update_one_widget_scrollbar_pointer (w, widget);
|
|
348
|
|
349 widget = SCROLLBAR_X_WIDGET (vinstance);
|
|
350 if (widget && XtIsManaged (widget))
|
|
351 update_one_widget_scrollbar_pointer (w, widget);
|
|
352 }
|
|
353 break;
|
|
354 case X_WINDOW_IS_SCROLLBAR:
|
|
355 if (!mir->vchild && !mir->hchild)
|
|
356 {
|
|
357 Widget widget;
|
|
358
|
|
359 widget = SCROLLBAR_X_WIDGET (hinstance);
|
|
360 if (widget && XtIsManaged (widget) &&
|
|
361 XtWindow (widget) == x_win)
|
|
362 return (struct window_mirror *) 1;
|
|
363
|
|
364 widget = SCROLLBAR_X_WIDGET (vinstance);
|
|
365 if (widget && XtIsManaged (widget) &&
|
|
366 XtWindow (widget) == x_win)
|
|
367 return (struct window_mirror *) 1;
|
|
368 }
|
|
369 break;
|
|
370 default:
|
|
371 abort ();
|
|
372 }
|
|
373 }
|
|
374
|
|
375 mir = mir->next;
|
|
376 window = w->next;
|
|
377 }
|
|
378
|
|
379 return NULL;
|
|
380 }
|
|
381
|
|
382 /* Used by callbacks. */
|
|
383 static struct window_mirror *
|
|
384 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
|
|
385 {
|
|
386 if (f->mirror_dirty)
|
|
387 update_frame_window_mirror (f);
|
|
388 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
|
617
|
389 XWINDOW_MIRROR (f->root_mirror), id, (Window) NULL);
|
428
|
390 }
|
|
391
|
|
392 /*
|
|
393 * This is the only callback provided for vertical scrollbars. It
|
|
394 * should be able to handle all of the scrollbar events in
|
|
395 * scroll_action (see lwlib.h). The client data will be of type
|
|
396 * scroll_event (see lwlib.h). */
|
|
397 static void
|
|
398 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
399 XtPointer client_data)
|
|
400 {
|
|
401 /* This function can GC */
|
|
402 scroll_event *data = (scroll_event *) client_data;
|
|
403 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
404 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
405 Lisp_Object win, frame;
|
|
406 struct scrollbar_instance *instance;
|
|
407 struct window_mirror *mirror;
|
|
408
|
|
409 if (!f)
|
|
410 return;
|
|
411
|
|
412 mirror = find_scrollbar_window_mirror (f, id);
|
442
|
413 if (!mirror)
|
|
414 return;
|
|
415
|
428
|
416 win = real_window (mirror, 1);
|
|
417
|
|
418 if (NILP (win))
|
|
419 return;
|
|
420 instance = mirror->scrollbar_vertical_instance;
|
|
421 frame = WINDOW_FRAME (XWINDOW (win));
|
|
422
|
|
423 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
424 is called. #### Why??? */
|
|
425 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
426
|
|
427 switch (data->action)
|
|
428 {
|
|
429 case SCROLLBAR_LINE_UP:
|
|
430 signal_special_Xt_user_event (frame, Qscrollbar_line_up, win);
|
|
431 break;
|
|
432
|
|
433 case SCROLLBAR_LINE_DOWN:
|
|
434 signal_special_Xt_user_event (frame, Qscrollbar_line_down, win);
|
|
435 break;
|
|
436
|
|
437 /* The Athena scrollbar paging behavior is that of xterms.
|
|
438 Depending on where you click the size of the page varies.
|
|
439 Motif always does a standard Emacs page. */
|
|
440 case SCROLLBAR_PAGE_UP:
|
|
441 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
442 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
443 {
|
|
444 double tmp = ((double) data->slider_value /
|
|
445 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
446 double line = tmp *
|
|
447 (double) window_displayed_height (XWINDOW (win));
|
|
448
|
|
449 if (line > -1.0)
|
|
450 line = -1.0;
|
|
451 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
452 Fcons (win, make_int ((int) line)));
|
|
453 }
|
|
454 #else
|
|
455 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
|
|
456 Fcons (win, Qnil));
|
|
457 #endif
|
|
458 break;
|
|
459
|
|
460 case SCROLLBAR_PAGE_DOWN:
|
|
461 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
|
|
462 !defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
463 {
|
|
464 double tmp = ((double) data->slider_value /
|
|
465 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
|
|
466 double line = tmp *
|
|
467 (double) window_displayed_height (XWINDOW (win));
|
|
468
|
|
469 if (SCROLLBAR_X_POS_DATA(instance).maximum >
|
|
470 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
|
|
471 {
|
|
472 if (line < 1.0)
|
|
473 line = 1.0;
|
|
474 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
475 Fcons (win,
|
|
476 make_int ((int) line)));
|
|
477 }
|
|
478 }
|
|
479 #else
|
|
480 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
|
|
481 Fcons (win, Qnil));
|
|
482 #endif
|
|
483 break;
|
|
484
|
|
485 case SCROLLBAR_TOP:
|
|
486 signal_special_Xt_user_event (frame, Qscrollbar_to_top, win);
|
|
487 break;
|
|
488
|
|
489 case SCROLLBAR_BOTTOM:
|
|
490 signal_special_Xt_user_event (frame, Qscrollbar_to_bottom, win);
|
|
491 break;
|
|
492
|
|
493
|
|
494 case SCROLLBAR_CHANGE:
|
|
495 inhibit_slider_size_change = 0;
|
|
496 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
497 vertical_drag_in_progress = 0;
|
|
498 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
499 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
500 XINT (Fwindow_start (win));
|
|
501 #else
|
|
502 stupid_vertical_scrollbar_drag_hack = 0;
|
|
503 #endif
|
|
504 break;
|
|
505
|
|
506 case SCROLLBAR_DRAG:
|
|
507 {
|
|
508 int value;
|
|
509
|
|
510 inhibit_slider_size_change = 1;
|
|
511
|
|
512 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
|
|
513 /* Doing drags with Motif-like scrollbars is a mess, since we
|
|
514 want to avoid having the window position jump when you
|
|
515 first grab the scrollbar, but we also want to ensure that
|
|
516 you can scroll all the way to the top or bottom of the
|
|
517 buffer. This can all be replaced with something sane when
|
|
518 we get line-based scrolling. */
|
|
519
|
|
520 vertical_drag_in_progress = 1;
|
|
521
|
|
522 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
|
|
523 {
|
|
524 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
|
|
525 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
|
|
526 XINT (Fwindow_start (win));
|
|
527 }
|
|
528
|
|
529 /* Could replace this piecewise linear scrolling with a
|
|
530 quadratic through the three points, but I'm not sure that
|
|
531 would feel any nicer in practice. */
|
|
532 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
|
|
533 {
|
|
534 /* We've dragged up; slide linearly from original position to
|
|
535 window-start=data.minimum, slider-value=data.minimum. */
|
|
536
|
|
537 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
538 <= SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
539 {
|
|
540 /* shouldn't get here, but just in case */
|
|
541 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
542 }
|
|
543 else
|
|
544 {
|
|
545 value = (int)
|
|
546 (SCROLLBAR_X_POS_DATA (instance).minimum
|
|
547 + (((double)
|
|
548 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
549 - SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
550 * (data->slider_value -
|
|
551 SCROLLBAR_X_POS_DATA (instance).minimum))
|
|
552 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
553 - SCROLLBAR_X_POS_DATA (instance).minimum)));
|
|
554 }
|
|
555 }
|
|
556 else
|
|
557 {
|
|
558 /* We've dragged down; slide linearly from original position to
|
|
559 window-start=data.maximum, slider-value=data.maximum. */
|
|
560
|
|
561 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
|
|
562 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
|
|
563 SCROLLBAR_X_POS_DATA (instance).slider_size))
|
|
564 {
|
|
565 /* avoid divide by zero */
|
|
566 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
|
|
567 }
|
|
568 else
|
|
569 {
|
|
570 value = (int)
|
|
571 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
|
|
572 + (((double)
|
|
573 (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
574 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
|
|
575 * (data->slider_value
|
|
576 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
|
|
577 / (SCROLLBAR_X_POS_DATA (instance).maximum
|
|
578 - SCROLLBAR_X_POS_DATA (instance).slider_size
|
|
579 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
|
|
580 }
|
|
581 }
|
|
582 #else
|
|
583 stupid_vertical_scrollbar_drag_hack = 0;
|
|
584 value = data->slider_value;
|
|
585 #endif
|
|
586
|
|
587 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
|
|
588 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
|
|
589 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
|
|
590 value = SCROLLBAR_X_POS_DATA (instance).minimum;
|
|
591
|
|
592 signal_special_Xt_user_event (frame, Qscrollbar_vertical_drag,
|
|
593 Fcons (win, make_int (value)));
|
|
594 }
|
|
595 break;
|
|
596
|
|
597 }
|
|
598 }
|
|
599
|
|
600 /*
|
|
601 * This is the only callback provided for horizontal scrollbars. It
|
|
602 * should be able to handle all of the scrollbar events in
|
|
603 * scroll_action (see lwlib.h). The client data will be of type
|
|
604 * scroll_event (see lwlib.h). */
|
|
605 static void
|
|
606 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
|
|
607 XtPointer client_data)
|
|
608 {
|
|
609 scroll_event *data = (scroll_event *) client_data;
|
|
610 struct device *d = get_device_from_display (XtDisplay (widget));
|
|
611 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
|
|
612 Lisp_Object win, frame;
|
|
613 struct window_mirror *mirror;
|
|
614
|
|
615 if (!f)
|
|
616 return;
|
|
617
|
|
618 mirror = find_scrollbar_window_mirror (f, id);
|
442
|
619 if (!mirror)
|
|
620 return;
|
|
621
|
428
|
622 win = real_window (mirror, 1);
|
|
623
|
|
624 if (NILP (win))
|
|
625 return;
|
|
626 frame = WINDOW_FRAME (XWINDOW (win));
|
|
627
|
|
628 /* It seems that this is necessary whenever signal_special_Xt_user_event()
|
|
629 is called. #### Why??? */
|
|
630 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
|
|
631
|
|
632 switch (data->action)
|
|
633 {
|
|
634 case SCROLLBAR_LINE_UP:
|
|
635 signal_special_Xt_user_event (frame, Qscrollbar_char_left, win);
|
|
636 break;
|
|
637 case SCROLLBAR_LINE_DOWN:
|
|
638 signal_special_Xt_user_event (frame, Qscrollbar_char_right, win);
|
|
639 break;
|
|
640 case SCROLLBAR_PAGE_UP:
|
|
641 signal_special_Xt_user_event (frame, Qscrollbar_page_left, win);
|
|
642 break;
|
|
643 case SCROLLBAR_PAGE_DOWN:
|
|
644 signal_special_Xt_user_event (frame, Qscrollbar_page_right, win);
|
|
645 break;
|
|
646 case SCROLLBAR_TOP:
|
|
647 signal_special_Xt_user_event (frame, Qscrollbar_to_left, win);
|
|
648 break;
|
|
649 case SCROLLBAR_BOTTOM:
|
|
650 signal_special_Xt_user_event (frame, Qscrollbar_to_right, win);
|
|
651 break;
|
|
652 case SCROLLBAR_CHANGE:
|
|
653 inhibit_slider_size_change = 0;
|
|
654 break;
|
|
655 case SCROLLBAR_DRAG:
|
|
656 inhibit_slider_size_change = 1;
|
|
657 /* #### Fix the damn toolkit code so they all work the same way.
|
|
658 Lucid is the one mostly wrong.*/
|
|
659 #if defined (LWLIB_SCROLLBARS_LUCID) || defined (LWLIB_SCROLLBARS_ATHENA3D)
|
|
660 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
661 (Fcons
|
|
662 (win, make_int (data->slider_value))));
|
|
663 #else
|
|
664 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
|
|
665 (Fcons
|
|
666 (win,
|
|
667 make_int (data->slider_value - 1))));
|
|
668 #endif
|
|
669 break;
|
|
670 default:
|
|
671 break;
|
|
672 }
|
|
673 }
|
|
674
|
|
675 static void
|
|
676 x_scrollbar_pointer_changed_in_window (struct window *w)
|
|
677 {
|
793
|
678 Lisp_Object window = wrap_window (w);
|
428
|
679
|
|
680 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
|
|
681 0, (Window) NULL);
|
|
682 }
|
|
683
|
|
684 /* Make sure that all scrollbars on frame are up-to-date. Called
|
|
685 directly from x_set_frame_properties in frame-x.c*/
|
|
686 void
|
|
687 x_update_frame_scrollbars (struct frame *f)
|
|
688 {
|
|
689 /* Consider this code to be "in_display" so that we abort() if Fsignal()
|
|
690 gets called. */
|
|
691 in_display++;
|
617
|
692 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window,
|
|
693 XWINDOW_MIRROR (f->root_mirror), 0, (Window) NULL);
|
428
|
694 in_display--;
|
|
695 if (in_display < 0) abort ();
|
|
696 }
|
|
697
|
|
698 #ifdef MEMORY_USAGE_STATS
|
|
699
|
|
700 static int
|
|
701 x_compute_scrollbar_instance_usage (struct device *d,
|
|
702 struct scrollbar_instance *inst,
|
|
703 struct overhead_stats *ovstats)
|
|
704 {
|
|
705 int total = 0;
|
|
706
|
|
707 while (inst)
|
|
708 {
|
|
709 struct x_scrollbar_data *data =
|
|
710 (struct x_scrollbar_data *) inst->scrollbar_data;
|
|
711
|
|
712 total += malloced_storage_size (data, sizeof (*data), ovstats);
|
|
713 total += malloced_storage_size (data->name, 1 + strlen (data->name),
|
|
714 ovstats);
|
|
715 inst = inst->next;
|
|
716 }
|
|
717
|
|
718 return total;
|
|
719 }
|
|
720
|
|
721 #endif /* MEMORY_USAGE_STATS */
|
|
722
|
|
723
|
|
724 /************************************************************************/
|
|
725 /* initialization */
|
|
726 /************************************************************************/
|
|
727
|
|
728 void
|
|
729 console_type_create_scrollbar_x (void)
|
|
730 {
|
|
731 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_slider_size_change);
|
|
732 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
|
|
733 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
|
|
734 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
|
|
735 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
|
|
736 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
|
|
737 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
|
|
738 #ifdef MEMORY_USAGE_STATS
|
|
739 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
|
|
740 #endif /* MEMORY_USAGE_STATS */
|
|
741 }
|
|
742
|
|
743 void
|
|
744 reinit_vars_of_scrollbar_x (void)
|
|
745 {
|
|
746 stupid_vertical_scrollbar_drag_hack = 1;
|
|
747 }
|
|
748
|
|
749 void
|
|
750 vars_of_scrollbar_x (void)
|
|
751 {
|
|
752 reinit_vars_of_scrollbar_x ();
|
|
753
|
|
754 #if defined (LWLIB_SCROLLBARS_LUCID)
|
|
755 Fprovide (intern ("lucid-scrollbars"));
|
|
756 #elif defined (LWLIB_SCROLLBARS_MOTIF)
|
|
757 Fprovide (intern ("motif-scrollbars"));
|
|
758 #elif defined (LWLIB_SCROLLBARS_ATHENA)
|
|
759 Fprovide (intern ("athena-scrollbars"));
|
|
760 #endif
|
|
761 }
|