428
+ − 1 /* scrollbar implementation -- X interface.
+ − 2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
+ − 3 Copyright (C) 1994 Amdahl Corporation.
+ − 4 Copyright (C) 1995 Sun Microsystems, Inc.
+ − 5 Copyright (C) 1995 Darrell Kindred <dkindred+@cmu.edu>.
+ − 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. */
+ − 23
+ − 24 /* Synched up with: Not in FSF. */
+ − 25
442
+ − 26 /* This file Mule-ized (more like Mule-verified) by Ben Wing, 7-8-00. */
+ − 27
428
+ − 28 #include <config.h>
+ − 29 #include "lisp.h"
+ − 30
872
+ − 31 #include "device-impl.h"
+ − 32 #include "frame-impl.h"
800
+ − 33 #include "window.h"
+ − 34
872
+ − 35 #include "console-x-impl.h"
428
+ − 36 #include "glyphs-x.h"
+ − 37 #include "scrollbar-x.h"
+ − 38
800
+ − 39 #include "EmacsFrame.h"
428
+ − 40
+ − 41 static void x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
+ − 42 XtPointer client_data);
+ − 43 static void x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
+ − 44 XtPointer client_data);
+ − 45
+ − 46 /* Used to prevent changing the size of the slider while drag
+ − 47 scrolling, under Motif. This is necessary because the Motif
+ − 48 scrollbar is incredibly stupid about updating the slider and causes
+ − 49 lots of flicker if it is done too often. */
+ − 50 static int inhibit_slider_size_change;
+ − 51 int stupid_vertical_scrollbar_drag_hack;
+ − 52
+ − 53 /* Doesn't work with athena */
+ − 54 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
+ − 55 static int vertical_drag_in_progress;
+ − 56 #endif
+ − 57
+ − 58
+ − 59 /* A device method. */
+ − 60 static int
+ − 61 x_inhibit_scrollbar_slider_size_change (void)
+ − 62 {
+ − 63 /* Doesn't work with Athena */
+ − 64 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
+ − 65 return inhibit_slider_size_change;
+ − 66 #else
+ − 67 return 0;
+ − 68 #endif
+ − 69 }
+ − 70
+ − 71 /* A device method. */
+ − 72 static void
+ − 73 x_free_scrollbar_instance (struct scrollbar_instance *instance)
+ − 74 {
3462
+ − 75 if (instance->scrollbar_data)
428
+ − 76 {
3462
+ − 77 if (SCROLLBAR_X_NAME (instance))
+ − 78 xfree (SCROLLBAR_X_NAME (instance), char *);
428
+ − 79
3462
+ − 80 if (SCROLLBAR_X_WIDGET (instance))
+ − 81 {
+ − 82 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
+ − 83 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
428
+ − 84
3462
+ − 85 lw_destroy_all_widgets (SCROLLBAR_X_ID (instance));
+ − 86 }
+ − 87
+ − 88 xfree (instance->scrollbar_data, void *);
+ − 89 }
428
+ − 90 }
+ − 91
+ − 92 /* A device method. */
+ − 93 static void
+ − 94 x_release_scrollbar_instance (struct scrollbar_instance *instance)
+ − 95 {
+ − 96 if (XtIsManaged (SCROLLBAR_X_WIDGET (instance)))
+ − 97 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
+ − 98 }
+ − 99
+ − 100 /* A device method. */
+ − 101 static void
+ − 102 x_create_scrollbar_instance (struct frame *f, int vertical,
+ − 103 struct scrollbar_instance *instance)
+ − 104 {
+ − 105 char buffer[32];
+ − 106
+ − 107 /* initialize the X specific data section. */
+ − 108 instance->scrollbar_data = xnew_and_zero (struct x_scrollbar_data);
+ − 109
+ − 110 SCROLLBAR_X_ID (instance) = new_lwlib_id ();
+ − 111 sprintf (buffer, "scrollbar_%d", SCROLLBAR_X_ID (instance));
+ − 112 SCROLLBAR_X_NAME (instance) = xstrdup (buffer);
+ − 113 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID) || \
+ − 114 defined (LWLIB_SCROLLBARS_ATHENA3D)
+ − 115 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = -1;
+ − 116 #endif
+ − 117
+ − 118 if (vertical)
+ − 119 {
+ − 120 SCROLLBAR_X_WIDGET (instance) =
+ − 121 lw_create_widget ("vertical-scrollbar", SCROLLBAR_X_NAME (instance),
+ − 122 SCROLLBAR_X_ID (instance),
+ − 123 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
+ − 124 x_update_vertical_scrollbar_callback, NULL, NULL);
+ − 125 }
+ − 126 else
+ − 127 {
+ − 128 SCROLLBAR_X_WIDGET (instance) =
+ − 129 lw_create_widget ("horizontal-scrollbar", SCROLLBAR_X_NAME (instance),
+ − 130 SCROLLBAR_X_ID (instance),
+ − 131 NULL, FRAME_X_CONTAINER_WIDGET (f), 0,
+ − 132 x_update_horizontal_scrollbar_callback, NULL, NULL);
+ − 133 }
+ − 134 }
+ − 135
+ − 136 #define UPDATE_DATA_FIELD(field) \
+ − 137 if (new_##field >= 0 && \
+ − 138 SCROLLBAR_X_POS_DATA (inst).field != new_##field) { \
+ − 139 SCROLLBAR_X_POS_DATA (inst).field = new_##field; \
+ − 140 inst->scrollbar_instance_changed = 1; \
+ − 141 }
+ − 142
+ − 143 /* A device method. */
+ − 144 /* #### The -1 check is such a hack. */
+ − 145 static void
+ − 146 x_update_scrollbar_instance_values (struct window *w,
+ − 147 struct scrollbar_instance *inst,
+ − 148 int new_line_increment,
+ − 149 int new_page_increment,
+ − 150 int new_minimum, int new_maximum,
+ − 151 int new_slider_size,
+ − 152 int new_slider_position,
+ − 153 int new_scrollbar_width,
+ − 154 int new_scrollbar_height,
+ − 155 int new_scrollbar_x, int new_scrollbar_y)
+ − 156 {
+ − 157 UPDATE_DATA_FIELD (line_increment);
+ − 158 UPDATE_DATA_FIELD (page_increment);
+ − 159 UPDATE_DATA_FIELD (minimum);
+ − 160 UPDATE_DATA_FIELD (maximum);
+ − 161 UPDATE_DATA_FIELD (slider_size);
+ − 162 UPDATE_DATA_FIELD (slider_position);
+ − 163 UPDATE_DATA_FIELD (scrollbar_width);
+ − 164 UPDATE_DATA_FIELD (scrollbar_height);
+ − 165 UPDATE_DATA_FIELD (scrollbar_x);
+ − 166 UPDATE_DATA_FIELD (scrollbar_y);
+ − 167
+ − 168 /* This doesn't work with Athena, why? */
+ − 169 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
+ − 170 if (w && !vertical_drag_in_progress)
+ − 171 {
+ − 172 int new_vov = SCROLLBAR_X_POS_DATA (inst).slider_position;
+ − 173 int new_vows = marker_position (w->start[CURRENT_DISP]);
+ − 174
+ − 175 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) != new_vov)
+ − 176 {
+ − 177 SCROLLBAR_X_VDRAG_ORIG_VALUE (inst) = new_vov;
+ − 178 inst->scrollbar_instance_changed = 1;
+ − 179 }
+ − 180 if (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) != new_vows)
+ − 181 {
+ − 182 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (inst) = new_vows;
+ − 183 inst->scrollbar_instance_changed = 1;
+ − 184 }
+ − 185 }
+ − 186 #endif
+ − 187 }
+ − 188
+ − 189 /* Used by x_update_scrollbar_instance_status. */
+ − 190 static void
+ − 191 update_one_scrollbar_bs (struct frame *f, Widget sb_widget)
+ − 192 {
+ − 193 Boolean use_backing_store;
+ − 194
+ − 195 Xt_GET_VALUE (FRAME_X_TEXT_WIDGET (f), XtNuseBackingStore, &use_backing_store);
+ − 196
+ − 197 if (use_backing_store && sb_widget)
+ − 198 {
+ − 199 unsigned long mask = CWBackingStore;
+ − 200 XSetWindowAttributes attrs;
+ − 201
+ − 202 attrs.backing_store = Always;
+ − 203 XChangeWindowAttributes (XtDisplay (sb_widget),
+ − 204 XtWindow (sb_widget),
+ − 205 mask,
+ − 206 &attrs);
+ − 207 }
+ − 208 }
+ − 209
+ − 210 /* Create a widget value structure for passing down to lwlib so that
+ − 211 it can update the scrollbar widgets. Used by
+ − 212 x_update_scrollbar_instance_status. */
+ − 213 static widget_value *
+ − 214 scrollbar_instance_to_widget_value (struct scrollbar_instance *instance)
+ − 215 {
+ − 216 widget_value *wv;
+ − 217
+ − 218 wv = xmalloc_widget_value ();
+ − 219 /* #### maybe should add malloc_scrollbar_values to resource these? */
+ − 220 wv->scrollbar_data = xnew (scrollbar_values);
+ − 221
+ − 222 wv->name = SCROLLBAR_X_NAME (instance);
436
+ − 223 wv->name = xstrdup (wv->name);
428
+ − 224 wv->value = 0;
+ − 225 wv->key = 0;
+ − 226 wv->enabled = instance->scrollbar_is_active;
+ − 227 wv->selected = 0;
+ − 228 wv->call_data = NULL;
+ − 229
+ − 230 *wv->scrollbar_data = SCROLLBAR_X_POS_DATA (instance);
+ − 231
+ − 232 wv->next = NULL;
+ − 233
+ − 234 return wv;
+ − 235 }
+ − 236
+ − 237 /* Used by x_update_scrollbar_instance_status. */
+ − 238 static void
+ − 239 update_one_widget_scrollbar_pointer (struct window *w, Widget wid)
+ − 240 {
+ − 241 if (POINTER_IMAGE_INSTANCEP (w->scrollbar_pointer))
+ − 242 {
+ − 243 XDefineCursor (XtDisplay (wid), XtWindow (wid),
+ − 244 XIMAGE_INSTANCE_X_CURSOR (w->scrollbar_pointer));
+ − 245 XSync (XtDisplay (wid), False);
+ − 246 }
+ − 247 }
+ − 248
+ − 249 /* A device method. */
+ − 250 static void
+ − 251 x_update_scrollbar_instance_status (struct window *w, int active, int size,
+ − 252 struct scrollbar_instance *instance)
+ − 253 {
+ − 254 struct frame *f = XFRAME (w->frame);
+ − 255 Boolean managed = XtIsManaged (SCROLLBAR_X_WIDGET (instance));
+ − 256
+ − 257 if (active && size)
+ − 258 {
+ − 259 widget_value *wv = scrollbar_instance_to_widget_value (instance);
+ − 260
+ − 261 if (instance->scrollbar_instance_changed)
+ − 262 {
+ − 263 lw_modify_all_widgets (SCROLLBAR_X_ID (instance), wv, 0);
+ − 264 instance->scrollbar_instance_changed = 0;
+ − 265 }
+ − 266
+ − 267 if (!managed)
+ − 268 {
+ − 269 XtManageChild (SCROLLBAR_X_WIDGET (instance));
+ − 270 if (XtWindow (SCROLLBAR_X_WIDGET (instance)))
+ − 271 {
+ − 272 /* Raise this window so that it's visible on top of the
+ − 273 text window below it. */
+ − 274 XRaiseWindow (XtDisplay (SCROLLBAR_X_WIDGET (instance)),
+ − 275 XtWindow (SCROLLBAR_X_WIDGET (instance)));
+ − 276 update_one_widget_scrollbar_pointer
+ − 277 (w, SCROLLBAR_X_WIDGET (instance));
+ − 278 if (!SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance))
+ − 279 {
+ − 280 update_one_scrollbar_bs (f, SCROLLBAR_X_WIDGET (instance));
+ − 281 SCROLLBAR_X_BACKING_STORE_INITIALIZED (instance) = 1;
+ − 282 }
+ − 283 }
+ − 284 }
+ − 285
2500
+ − 286 if (!wv->scrollbar_data) ABORT ();
436
+ − 287 free_widget_value_tree (wv);
428
+ − 288 }
+ − 289 else if (managed)
+ − 290 {
+ − 291 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
+ − 292 /* This isn't needed with Athena Scrollbars. It might not be needed */
+ − 293 /* with Motif scrollbars (it is apparently needed with Lesstif). */
+ − 294 XtUngrabKeyboard (SCROLLBAR_X_WIDGET (instance), CurrentTime);
+ − 295 #endif
+ − 296 XtUnmanageChild (SCROLLBAR_X_WIDGET (instance));
+ − 297 }
+ − 298 }
+ − 299
+ − 300 enum x_scrollbar_loop
+ − 301 {
+ − 302 X_FIND_SCROLLBAR_WINDOW_MIRROR,
+ − 303 X_SET_SCROLLBAR_POINTER,
+ − 304 X_WINDOW_IS_SCROLLBAR,
+ − 305 X_UPDATE_FRAME_SCROLLBARS
+ − 306 };
+ − 307
+ − 308 static struct window_mirror *
+ − 309 x_scrollbar_loop (enum x_scrollbar_loop type, Lisp_Object window,
+ − 310 struct window_mirror *mir,
+ − 311 LWLIB_ID id, Window x_win)
+ − 312 {
+ − 313 struct window_mirror *retval = NULL;
+ − 314
+ − 315 while (mir)
+ − 316 {
+ − 317 struct scrollbar_instance *vinstance = mir->scrollbar_vertical_instance;
+ − 318 struct scrollbar_instance *hinstance = mir->scrollbar_horizontal_instance;
+ − 319 struct window *w = XWINDOW (window);
+ − 320
+ − 321 if (mir->vchild)
+ − 322 retval = x_scrollbar_loop (type, w->vchild, mir->vchild, id, x_win);
+ − 323 else if (mir->hchild)
+ − 324 retval = x_scrollbar_loop (type, w->hchild, mir->hchild, id, x_win);
+ − 325 if (retval)
+ − 326 return retval;
+ − 327
+ − 328 if (hinstance || vinstance)
+ − 329 {
+ − 330 switch (type)
+ − 331 {
+ − 332 case X_FIND_SCROLLBAR_WINDOW_MIRROR:
+ − 333 if ((vinstance && SCROLLBAR_X_ID (vinstance) == id) ||
+ − 334 (hinstance && SCROLLBAR_X_ID (hinstance) == id))
+ − 335 return mir;
+ − 336 break;
+ − 337 case X_UPDATE_FRAME_SCROLLBARS:
+ − 338 if (!mir->vchild && !mir->hchild)
+ − 339 update_window_scrollbars (w, mir, 1, 0);
+ − 340 break;
+ − 341 case X_SET_SCROLLBAR_POINTER:
+ − 342 if (!mir->vchild && !mir->hchild)
+ − 343 {
+ − 344 Widget widget;
+ − 345
+ − 346 widget = SCROLLBAR_X_WIDGET (hinstance);
+ − 347 if (widget && XtIsManaged (widget))
+ − 348 update_one_widget_scrollbar_pointer (w, widget);
+ − 349
+ − 350 widget = SCROLLBAR_X_WIDGET (vinstance);
+ − 351 if (widget && XtIsManaged (widget))
+ − 352 update_one_widget_scrollbar_pointer (w, widget);
+ − 353 }
+ − 354 break;
+ − 355 case X_WINDOW_IS_SCROLLBAR:
+ − 356 if (!mir->vchild && !mir->hchild)
+ − 357 {
+ − 358 Widget widget;
+ − 359
+ − 360 widget = SCROLLBAR_X_WIDGET (hinstance);
+ − 361 if (widget && XtIsManaged (widget) &&
+ − 362 XtWindow (widget) == x_win)
+ − 363 return (struct window_mirror *) 1;
+ − 364
+ − 365 widget = SCROLLBAR_X_WIDGET (vinstance);
+ − 366 if (widget && XtIsManaged (widget) &&
+ − 367 XtWindow (widget) == x_win)
+ − 368 return (struct window_mirror *) 1;
+ − 369 }
+ − 370 break;
+ − 371 default:
2500
+ − 372 ABORT ();
428
+ − 373 }
+ − 374 }
+ − 375
+ − 376 mir = mir->next;
+ − 377 window = w->next;
+ − 378 }
+ − 379
+ − 380 return NULL;
+ − 381 }
+ − 382
+ − 383 /* Used by callbacks. */
+ − 384 static struct window_mirror *
+ − 385 find_scrollbar_window_mirror (struct frame *f, LWLIB_ID id)
+ − 386 {
+ − 387 if (f->mirror_dirty)
+ − 388 update_frame_window_mirror (f);
+ − 389 return x_scrollbar_loop (X_FIND_SCROLLBAR_WINDOW_MIRROR, f->root_window,
617
+ − 390 XWINDOW_MIRROR (f->root_mirror), id, (Window) NULL);
428
+ − 391 }
+ − 392
+ − 393 /*
+ − 394 * This is the only callback provided for vertical scrollbars. It
+ − 395 * should be able to handle all of the scrollbar events in
+ − 396 * scroll_action (see lwlib.h). The client data will be of type
+ − 397 * scroll_event (see lwlib.h). */
+ − 398 static void
+ − 399 x_update_vertical_scrollbar_callback (Widget widget, LWLIB_ID id,
+ − 400 XtPointer client_data)
+ − 401 {
+ − 402 /* This function can GC */
+ − 403 scroll_event *data = (scroll_event *) client_data;
+ − 404 struct device *d = get_device_from_display (XtDisplay (widget));
+ − 405 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
+ − 406 Lisp_Object win, frame;
+ − 407 struct scrollbar_instance *instance;
+ − 408 struct window_mirror *mirror;
+ − 409
+ − 410 if (!f)
+ − 411 return;
+ − 412
+ − 413 mirror = find_scrollbar_window_mirror (f, id);
442
+ − 414 if (!mirror)
+ − 415 return;
+ − 416
428
+ − 417 win = real_window (mirror, 1);
+ − 418
+ − 419 if (NILP (win))
+ − 420 return;
+ − 421 instance = mirror->scrollbar_vertical_instance;
+ − 422 frame = WINDOW_FRAME (XWINDOW (win));
+ − 423
+ − 424 /* It seems that this is necessary whenever signal_special_Xt_user_event()
+ − 425 is called. #### Why??? */
+ − 426 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
+ − 427
+ − 428 switch (data->action)
+ − 429 {
+ − 430 case SCROLLBAR_LINE_UP:
+ − 431 signal_special_Xt_user_event (frame, Qscrollbar_line_up, win);
+ − 432 break;
+ − 433
+ − 434 case SCROLLBAR_LINE_DOWN:
+ − 435 signal_special_Xt_user_event (frame, Qscrollbar_line_down, win);
+ − 436 break;
+ − 437
+ − 438 /* The Athena scrollbar paging behavior is that of xterms.
+ − 439 Depending on where you click the size of the page varies.
+ − 440 Motif always does a standard Emacs page. */
+ − 441 case SCROLLBAR_PAGE_UP:
+ − 442 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
+ − 443 !defined (LWLIB_SCROLLBARS_ATHENA3D)
+ − 444 {
+ − 445 double tmp = ((double) data->slider_value /
+ − 446 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
+ − 447 double line = tmp *
+ − 448 (double) window_displayed_height (XWINDOW (win));
+ − 449
+ − 450 if (line > -1.0)
+ − 451 line = -1.0;
+ − 452 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
+ − 453 Fcons (win, make_int ((int) line)));
+ − 454 }
+ − 455 #else
+ − 456 signal_special_Xt_user_event (frame, Qscrollbar_page_up,
+ − 457 Fcons (win, Qnil));
+ − 458 #endif
+ − 459 break;
+ − 460
+ − 461 case SCROLLBAR_PAGE_DOWN:
+ − 462 #if !defined (LWLIB_SCROLLBARS_MOTIF) && !defined (LWLIB_SCROLLBARS_LUCID) && \
+ − 463 !defined (LWLIB_SCROLLBARS_ATHENA3D)
+ − 464 {
+ − 465 double tmp = ((double) data->slider_value /
+ − 466 (double) SCROLLBAR_X_POS_DATA(instance).scrollbar_height);
+ − 467 double line = tmp *
+ − 468 (double) window_displayed_height (XWINDOW (win));
+ − 469
+ − 470 if (SCROLLBAR_X_POS_DATA(instance).maximum >
+ − 471 (SCROLLBAR_X_POS_DATA(instance).slider_size + SCROLLBAR_X_POS_DATA(instance).slider_position))
+ − 472 {
+ − 473 if (line < 1.0)
+ − 474 line = 1.0;
+ − 475 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
+ − 476 Fcons (win,
+ − 477 make_int ((int) line)));
+ − 478 }
+ − 479 }
+ − 480 #else
+ − 481 signal_special_Xt_user_event (frame, Qscrollbar_page_down,
+ − 482 Fcons (win, Qnil));
+ − 483 #endif
+ − 484 break;
+ − 485
+ − 486 case SCROLLBAR_TOP:
+ − 487 signal_special_Xt_user_event (frame, Qscrollbar_to_top, win);
+ − 488 break;
+ − 489
+ − 490 case SCROLLBAR_BOTTOM:
+ − 491 signal_special_Xt_user_event (frame, Qscrollbar_to_bottom, win);
+ − 492 break;
+ − 493
+ − 494
+ − 495 case SCROLLBAR_CHANGE:
+ − 496 inhibit_slider_size_change = 0;
+ − 497 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
+ − 498 vertical_drag_in_progress = 0;
+ − 499 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
+ − 500 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
+ − 501 XINT (Fwindow_start (win));
+ − 502 #else
+ − 503 stupid_vertical_scrollbar_drag_hack = 0;
+ − 504 #endif
+ − 505 break;
+ − 506
+ − 507 case SCROLLBAR_DRAG:
+ − 508 {
+ − 509 int value;
+ − 510
+ − 511 inhibit_slider_size_change = 1;
+ − 512
+ − 513 #if defined (LWLIB_SCROLLBARS_MOTIF) || defined (LWLIB_SCROLLBARS_LUCID)
+ − 514 /* Doing drags with Motif-like scrollbars is a mess, since we
+ − 515 want to avoid having the window position jump when you
+ − 516 first grab the scrollbar, but we also want to ensure that
+ − 517 you can scroll all the way to the top or bottom of the
+ − 518 buffer. This can all be replaced with something sane when
+ − 519 we get line-based scrolling. */
+ − 520
+ − 521 vertical_drag_in_progress = 1;
+ − 522
+ − 523 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) < 0)
+ − 524 {
+ − 525 SCROLLBAR_X_VDRAG_ORIG_VALUE (instance) = data->slider_value;
+ − 526 SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance) =
+ − 527 XINT (Fwindow_start (win));
+ − 528 }
+ − 529
+ − 530 /* Could replace this piecewise linear scrolling with a
+ − 531 quadratic through the three points, but I'm not sure that
+ − 532 would feel any nicer in practice. */
+ − 533 if (data->slider_value < SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))
+ − 534 {
+ − 535 /* We've dragged up; slide linearly from original position to
+ − 536 window-start=data.minimum, slider-value=data.minimum. */
+ − 537
+ − 538 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
+ − 539 <= SCROLLBAR_X_POS_DATA (instance).minimum)
+ − 540 {
+ − 541 /* shouldn't get here, but just in case */
+ − 542 value = SCROLLBAR_X_POS_DATA (instance).minimum;
+ − 543 }
+ − 544 else
+ − 545 {
+ − 546 value = (int)
+ − 547 (SCROLLBAR_X_POS_DATA (instance).minimum
+ − 548 + (((double)
+ − 549 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
+ − 550 - SCROLLBAR_X_POS_DATA (instance).minimum)
+ − 551 * (data->slider_value -
+ − 552 SCROLLBAR_X_POS_DATA (instance).minimum))
+ − 553 / (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
+ − 554 - SCROLLBAR_X_POS_DATA (instance).minimum)));
+ − 555 }
+ − 556 }
+ − 557 else
+ − 558 {
+ − 559 /* We've dragged down; slide linearly from original position to
+ − 560 window-start=data.maximum, slider-value=data.maximum. */
+ − 561
+ − 562 if (SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)
+ − 563 >= (SCROLLBAR_X_POS_DATA (instance).maximum -
+ − 564 SCROLLBAR_X_POS_DATA (instance).slider_size))
+ − 565 {
+ − 566 /* avoid divide by zero */
+ − 567 value = SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance);
+ − 568 }
+ − 569 else
+ − 570 {
+ − 571 value = (int)
+ − 572 (SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance)
+ − 573 + (((double)
+ − 574 (SCROLLBAR_X_POS_DATA (instance).maximum
+ − 575 - SCROLLBAR_X_VDRAG_ORIG_WINDOW_START (instance))
+ − 576 * (data->slider_value
+ − 577 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance)))
+ − 578 / (SCROLLBAR_X_POS_DATA (instance).maximum
+ − 579 - SCROLLBAR_X_POS_DATA (instance).slider_size
+ − 580 - SCROLLBAR_X_VDRAG_ORIG_VALUE (instance))));
+ − 581 }
+ − 582 }
+ − 583 #else
+ − 584 stupid_vertical_scrollbar_drag_hack = 0;
+ − 585 value = data->slider_value;
+ − 586 #endif
+ − 587
+ − 588 if (value >= SCROLLBAR_X_POS_DATA (instance).maximum)
+ − 589 value = SCROLLBAR_X_POS_DATA (instance).maximum - 1;
+ − 590 if (value < SCROLLBAR_X_POS_DATA (instance).minimum)
+ − 591 value = SCROLLBAR_X_POS_DATA (instance).minimum;
+ − 592
+ − 593 signal_special_Xt_user_event (frame, Qscrollbar_vertical_drag,
+ − 594 Fcons (win, make_int (value)));
+ − 595 }
+ − 596 break;
+ − 597
+ − 598 }
+ − 599 }
+ − 600
+ − 601 /*
+ − 602 * This is the only callback provided for horizontal scrollbars. It
+ − 603 * should be able to handle all of the scrollbar events in
+ − 604 * scroll_action (see lwlib.h). The client data will be of type
+ − 605 * scroll_event (see lwlib.h). */
+ − 606 static void
+ − 607 x_update_horizontal_scrollbar_callback (Widget widget, LWLIB_ID id,
+ − 608 XtPointer client_data)
+ − 609 {
+ − 610 scroll_event *data = (scroll_event *) client_data;
+ − 611 struct device *d = get_device_from_display (XtDisplay (widget));
+ − 612 struct frame *f = x_any_window_to_frame (d, XtWindow (widget));
+ − 613 Lisp_Object win, frame;
+ − 614 struct window_mirror *mirror;
+ − 615
+ − 616 if (!f)
+ − 617 return;
+ − 618
+ − 619 mirror = find_scrollbar_window_mirror (f, id);
442
+ − 620 if (!mirror)
+ − 621 return;
+ − 622
428
+ − 623 win = real_window (mirror, 1);
+ − 624
+ − 625 if (NILP (win))
+ − 626 return;
+ − 627 frame = WINDOW_FRAME (XWINDOW (win));
+ − 628
+ − 629 /* It seems that this is necessary whenever signal_special_Xt_user_event()
+ − 630 is called. #### Why??? */
+ − 631 DEVICE_X_MOUSE_TIMESTAMP (d) = DEVICE_X_GLOBAL_MOUSE_TIMESTAMP (d);
+ − 632
+ − 633 switch (data->action)
+ − 634 {
+ − 635 case SCROLLBAR_LINE_UP:
+ − 636 signal_special_Xt_user_event (frame, Qscrollbar_char_left, win);
+ − 637 break;
+ − 638 case SCROLLBAR_LINE_DOWN:
+ − 639 signal_special_Xt_user_event (frame, Qscrollbar_char_right, win);
+ − 640 break;
+ − 641 case SCROLLBAR_PAGE_UP:
+ − 642 signal_special_Xt_user_event (frame, Qscrollbar_page_left, win);
+ − 643 break;
+ − 644 case SCROLLBAR_PAGE_DOWN:
+ − 645 signal_special_Xt_user_event (frame, Qscrollbar_page_right, win);
+ − 646 break;
+ − 647 case SCROLLBAR_TOP:
+ − 648 signal_special_Xt_user_event (frame, Qscrollbar_to_left, win);
+ − 649 break;
+ − 650 case SCROLLBAR_BOTTOM:
+ − 651 signal_special_Xt_user_event (frame, Qscrollbar_to_right, win);
+ − 652 break;
+ − 653 case SCROLLBAR_CHANGE:
+ − 654 inhibit_slider_size_change = 0;
+ − 655 break;
+ − 656 case SCROLLBAR_DRAG:
+ − 657 inhibit_slider_size_change = 1;
+ − 658 /* #### Fix the damn toolkit code so they all work the same way.
+ − 659 Lucid is the one mostly wrong.*/
+ − 660 #if defined (LWLIB_SCROLLBARS_LUCID) || defined (LWLIB_SCROLLBARS_ATHENA3D)
+ − 661 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
+ − 662 (Fcons
+ − 663 (win, make_int (data->slider_value))));
+ − 664 #else
+ − 665 signal_special_Xt_user_event (frame, Qscrollbar_horizontal_drag,
+ − 666 (Fcons
+ − 667 (win,
+ − 668 make_int (data->slider_value - 1))));
+ − 669 #endif
+ − 670 break;
+ − 671 default:
+ − 672 break;
+ − 673 }
+ − 674 }
+ − 675
+ − 676 static void
+ − 677 x_scrollbar_pointer_changed_in_window (struct window *w)
+ − 678 {
793
+ − 679 Lisp_Object window = wrap_window (w);
428
+ − 680
+ − 681 x_scrollbar_loop (X_SET_SCROLLBAR_POINTER, window, find_window_mirror (w),
+ − 682 0, (Window) NULL);
+ − 683 }
+ − 684
+ − 685 /* Make sure that all scrollbars on frame are up-to-date. Called
+ − 686 directly from x_set_frame_properties in frame-x.c*/
+ − 687 void
+ − 688 x_update_frame_scrollbars (struct frame *f)
+ − 689 {
617
+ − 690 x_scrollbar_loop (X_UPDATE_FRAME_SCROLLBARS, f->root_window,
+ − 691 XWINDOW_MIRROR (f->root_mirror), 0, (Window) NULL);
428
+ − 692 }
+ − 693
+ − 694 #ifdef MEMORY_USAGE_STATS
+ − 695
+ − 696 static int
2286
+ − 697 x_compute_scrollbar_instance_usage (struct device *UNUSED (d),
428
+ − 698 struct scrollbar_instance *inst,
+ − 699 struct overhead_stats *ovstats)
+ − 700 {
+ − 701 int total = 0;
+ − 702
+ − 703 while (inst)
+ − 704 {
+ − 705 struct x_scrollbar_data *data =
+ − 706 (struct x_scrollbar_data *) inst->scrollbar_data;
+ − 707
3024
+ − 708 total += malloced_storage_size (data, sizeof (*data), ovstats);
+ − 709 total += malloced_storage_size (data->name, 1 + strlen (data->name),
428
+ − 710 ovstats);
+ − 711 inst = inst->next;
+ − 712 }
+ − 713
+ − 714 return total;
+ − 715 }
+ − 716
+ − 717 #endif /* MEMORY_USAGE_STATS */
+ − 718
+ − 719
+ − 720 /************************************************************************/
+ − 721 /* initialization */
+ − 722 /************************************************************************/
+ − 723
+ − 724 void
+ − 725 console_type_create_scrollbar_x (void)
+ − 726 {
+ − 727 CONSOLE_HAS_METHOD (x, inhibit_scrollbar_slider_size_change);
+ − 728 CONSOLE_HAS_METHOD (x, free_scrollbar_instance);
+ − 729 CONSOLE_HAS_METHOD (x, release_scrollbar_instance);
+ − 730 CONSOLE_HAS_METHOD (x, create_scrollbar_instance);
+ − 731 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_values);
+ − 732 CONSOLE_HAS_METHOD (x, update_scrollbar_instance_status);
+ − 733 CONSOLE_HAS_METHOD (x, scrollbar_pointer_changed_in_window);
+ − 734 #ifdef MEMORY_USAGE_STATS
+ − 735 CONSOLE_HAS_METHOD (x, compute_scrollbar_instance_usage);
+ − 736 #endif /* MEMORY_USAGE_STATS */
+ − 737 }
+ − 738
+ − 739 void
+ − 740 reinit_vars_of_scrollbar_x (void)
+ − 741 {
+ − 742 stupid_vertical_scrollbar_drag_hack = 1;
+ − 743 }
+ − 744
+ − 745 void
+ − 746 vars_of_scrollbar_x (void)
+ − 747 {
+ − 748 #if defined (LWLIB_SCROLLBARS_LUCID)
+ − 749 Fprovide (intern ("lucid-scrollbars"));
+ − 750 #elif defined (LWLIB_SCROLLBARS_MOTIF)
+ − 751 Fprovide (intern ("motif-scrollbars"));
+ − 752 #elif defined (LWLIB_SCROLLBARS_ATHENA)
+ − 753 Fprovide (intern ("athena-scrollbars"));
+ − 754 #endif
+ − 755 }
