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