1 /* scrollbar implementation -- mswindows 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>.
7 This file is part of XEmacs.
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
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
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. */
24 /* Synched up with: Not in FSF. */
29 #include "console-msw.h"
32 #include "scrollbar-msw.h"
33 #include "scrollbar.h"
34 #include "specifier.h"
37 /* We use a similar sort of vertical scrollbar drag hack for mswindows
38 * scrollbars as is used for Motif or Lucid scrollbars under X.
39 * We do character-based instead of line-based scrolling, which can mean that
40 * without the hack it is impossible to drag to the end of a buffer. */
41 #define VERTICAL_SCROLLBAR_DRAG_HACK
43 static int vertical_drag_in_progress = 0;
46 mswindows_create_scrollbar_instance (struct frame *f, int vertical,
47 struct scrollbar_instance *sb)
51 sb->scrollbar_data = xnew_and_zero (struct mswindows_scrollbar_data);
54 orientation = SBS_VERT;
56 orientation = SBS_HORZ;
58 SCROLLBAR_MSW_HANDLE (sb) =
59 CreateWindowEx(0, "SCROLLBAR", 0, orientation|WS_CHILD,
60 CW_USEDEFAULT, CW_USEDEFAULT,
61 CW_USEDEFAULT, CW_USEDEFAULT,
62 FRAME_MSWINDOWS_HANDLE (f),
64 SCROLLBAR_MSW_INFO (sb).cbSize = sizeof(SCROLLINFO);
65 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL;
66 GetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
67 &SCROLLBAR_MSW_INFO (sb));
68 SetWindowLong (SCROLLBAR_MSW_HANDLE(sb), GWL_USERDATA, (LONG)sb);
72 HWND h = SCROLLBAR_MSW_HANDLE (sb);
73 int x = SetWindowLong (SCROLLBAR_MSW_HANDLE(sb), GWL_USERDATA, (LONG)sb);
74 int y = GetLastError();
75 struct scrollbar_instance *z = (struct scrollbar_instance *)GetWindowLong (SCROLLBAR_MSW_HANDLE(sb),
83 mswindows_free_scrollbar_instance (struct scrollbar_instance *sb)
85 DestroyWindow (SCROLLBAR_MSW_HANDLE (sb));
86 if (sb->scrollbar_data)
87 xfree (sb->scrollbar_data);
91 mswindows_release_scrollbar_instance (struct scrollbar_instance *sb)
93 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, 0);
94 SCROLLBAR_MSW_SIZE (sb) = 0;
97 #define UPDATE_POS_FIELD(field) \
98 if (new_##field >= 0 && SCROLLBAR_MSW_DATA (sb)->field != new_##field) { \
99 SCROLLBAR_MSW_DATA (sb)->field = new_##field; \
104 mswindows_update_scrollbar_instance_values (struct window *w,
105 struct scrollbar_instance *sb,
106 int new_line_increment,
107 int new_page_increment,
108 int new_minimum, int new_maximum,
110 int new_slider_position,
111 int new_scrollbar_width,
112 int new_scrollbar_height,
117 long styles = GetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_STYLE);
118 int vert = styles & SBS_VERT;
121 mswindows_output_last_error("GetWindowLong");
126 stderr_out ("[%d, %d], page = %d, pos = %d, inhibit = %d\n", new_minimum, new_maximum,
127 new_slider_size, new_slider_position,inhibit_slider_size_change);
130 /* These might be optimized, but since at least one will change at each
131 call, it's probably not worth it. */
132 SCROLLBAR_MSW_INFO (sb).nMin = new_minimum;
133 SCROLLBAR_MSW_INFO (sb).nMax = new_maximum;
134 SCROLLBAR_MSW_INFO (sb).nPage = new_slider_size + 1; /* +1 for DISABLENOSCROLL */
135 SCROLLBAR_MSW_INFO (sb).nPos = new_slider_position;
136 #ifndef VERTICAL_SCROLLBAR_DRAG_HACK
137 SCROLLBAR_MSW_INFO (sb).fMask = ((vert && vertical_drag_in_progress)
138 ? SIF_RANGE | SIF_POS
139 : SIF_ALL | SIF_DISABLENOSCROLL);
141 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL | SIF_DISABLENOSCROLL;
143 /* Ignore XEmacs' requests to update the thumb position and size; they don't
144 * bear any relation to reality because we're reporting made-up positions */
145 if (!(vert && vertical_drag_in_progress))
147 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb),
150 UPDATE_POS_FIELD (scrollbar_x);
151 UPDATE_POS_FIELD (scrollbar_y);
152 UPDATE_POS_FIELD (scrollbar_width);
153 UPDATE_POS_FIELD (scrollbar_height);
157 MoveWindow(SCROLLBAR_MSW_HANDLE (sb),
158 new_scrollbar_x, new_scrollbar_y,
159 new_scrollbar_width, new_scrollbar_height,
165 mswindows_update_scrollbar_instance_status (struct window *w,
166 int active, int size,
167 struct scrollbar_instance *sb)
169 if (SCROLLBAR_MSW_SIZE (sb) != size)
171 SCROLLBAR_MSW_SIZE (sb) = size;
172 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
173 SCROLLBAR_MSW_SIZE (sb));
174 SCROLLBAR_MSW_INFO(sb).fMask |= SIF_DISABLENOSCROLL;
175 SetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb), TRUE);
180 mswindows_handle_scrollbar_event (HWND hwnd, int code, int pos)
183 Lisp_Object win, frame;
184 struct scrollbar_instance *sb;
185 long styles = GetWindowLong (hwnd, GWL_STYLE);
186 int vert = styles & SBS_VERT;
189 mswindows_output_last_error("GetWindowLong");
193 sb = (struct scrollbar_instance *)GetWindowLong (hwnd, GWL_USERDATA);
194 win = real_window ((sb==NULL) ? GetFocus() : sb->mirror, 1);
195 frame = XWINDOW (win)->frame;
198 /* SB_LINEDOWN == SB_CHARLEFT etc. This is the way they will
199 always be - any Windows is binary compatible backward with
205 mswindows_enqueue_misc_user_event
206 (frame, vert ? Qscrollbar_line_down : Qscrollbar_char_right, win);
210 mswindows_enqueue_misc_user_event
211 (frame, vert ? Qscrollbar_line_up : Qscrollbar_char_left, win);
215 mswindows_enqueue_misc_user_event
216 (win, vert ? Qscrollbar_page_down : Qscrollbar_page_right,
217 vert ? Fcons (win, Qnil) : win);
221 mswindows_enqueue_misc_user_event
223 vert ? Qscrollbar_page_up : Qscrollbar_page_left,
224 vert ? Fcons (win, Qnil) : win);
228 mswindows_enqueue_misc_user_event
229 (frame, vert ? Qscrollbar_to_bottom : Qscrollbar_to_right, win);
233 mswindows_enqueue_misc_user_event
234 (frame, vert ? Qscrollbar_to_top : Qscrollbar_to_left, win);
238 case SB_THUMBPOSITION:
241 SCROLLINFO scrollinfo;
242 scrollinfo.cbSize = sizeof(SCROLLINFO);
243 scrollinfo.fMask = SIF_ALL;
244 GetScrollInfo (hwnd, SB_CTL, &scrollinfo);
245 vertical_drag_in_progress = vert;
246 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
247 if (vert && (scrollinfo.nTrackPos > scrollinfo.nPos))
248 /* new buffer position =
249 * buffer position at start of drag +
250 * ((text remaining in buffer at start of drag) *
251 * (amount that the thumb has been moved) /
252 * (space that remained past end of the thumb at start of drag)) */
256 (scrollinfo.nMax - scrollinfo.nPos)
257 * (scrollinfo.nTrackPos - scrollinfo.nPos))
258 / (scrollinfo.nMax - scrollinfo.nPage - scrollinfo.nPos)))
259 - 2; /* ensure that the last line doesn't disappear off screen */
262 pos = scrollinfo.nTrackPos;
263 mswindows_enqueue_misc_user_event
265 vert ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag,
266 Fcons (win, make_int (pos)));
271 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
272 if (vertical_drag_in_progress && sb)
273 /* User has just dropped the thumb - finally update it */
274 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
275 &SCROLLBAR_MSW_INFO (sb), TRUE);
277 vertical_drag_in_progress = 0;
283 can_scroll (struct scrollbar_instance* scrollbar)
285 return scrollbar != NULL
286 && IsWindowVisible (SCROLLBAR_MSW_HANDLE (scrollbar))
287 && IsWindowEnabled (SCROLLBAR_MSW_HANDLE (scrollbar));
291 mswindows_handle_mousewheel_event (Lisp_Object frame, int keys, int delta,
294 int hasVertBar, hasHorzBar; /* Indicates presence of scroll bars */
295 unsigned wheelScrollLines = 0; /* Number of lines per wheel notch */
297 struct window_mirror *mirror;
300 donde_esta.x = where.x;
301 donde_esta.y = where.y;
303 ScreenToClient (FRAME_MSWINDOWS_HANDLE (XFRAME (frame)), &donde_esta);
305 /* Find the window to scroll */
307 int mene, _mene, tekel, upharsin;
310 Lisp_Object corpore, sano;
311 struct window *needle_in_haystack;
313 // stderr_out ("donde_esta: %d %d\n", donde_esta.x, donde_esta.y);
314 pixel_to_glyph_translation (XFRAME (frame), donde_esta.x, donde_esta.y,
315 &mene, &_mene, &tekel, &upharsin,
317 &mens, &sana, &in, &corpore, &sano);
319 if (needle_in_haystack)
321 XSETWINDOW (win, needle_in_haystack);
322 // stderr_out ("found needle\n");
323 // debug_print (win);
327 win = FRAME_SELECTED_WINDOW (XFRAME (frame));
328 needle_in_haystack = XWINDOW (win);
331 mirror = find_window_mirror (needle_in_haystack);
334 /* Check that there is something to scroll */
335 hasVertBar = can_scroll (mirror->scrollbar_vertical_instance);
336 hasHorzBar = can_scroll (mirror->scrollbar_horizontal_instance);
337 if (!hasVertBar && !hasHorzBar)
340 /* No support for panning and zooming, so ignore */
341 if (keys & (MK_SHIFT | MK_CONTROL))
344 /* Get the number of lines per wheel delta */
345 SystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &wheelScrollLines, 0);
347 /* Calculate the amount to scroll */
348 if (wheelScrollLines == WHEEL_PAGESCROLL)
350 /* Scroll by a page */
351 Lisp_Object function;
353 function = delta > 0 ? Qscrollbar_page_up : Qscrollbar_page_down;
355 function = delta > 0 ? Qscrollbar_page_left : Qscrollbar_page_right;
356 mswindows_enqueue_misc_user_event (frame, function, Fcons (win, Qnil));
358 else /* Scroll by a number of lines */
360 /* Calc the number of lines to scroll */
361 int toScroll = MulDiv (delta, wheelScrollLines, WHEEL_DELTA);
364 Lisp_Object function;
366 function = delta > 0 ? Qscrollbar_line_up : Qscrollbar_line_down;
368 function = delta > 0 ? Qscrollbar_char_left : Qscrollbar_char_right;
370 toScroll = -toScroll;
372 mswindows_enqueue_misc_user_event (frame, function, win);
378 #ifdef MEMORY_USAGE_STATS
381 mswindows_compute_scrollbar_instance_usage (struct device *d,
382 struct scrollbar_instance *inst,
383 struct overhead_stats *ovstats)
389 struct mswindows_scrollbar_data *data =
390 (struct mswindows_scrollbar_data *) inst->scrollbar_data;
392 total += malloced_storage_size (data, sizeof (*data), ovstats);
399 #endif /* MEMORY_USAGE_STATS */
401 /************************************************************************/
402 /* Device-specific ghost specifiers initialization */
403 /************************************************************************/
405 DEFUN ("mswindows-init-scrollbar-metrics", Fmswindows_init_scrollbar_metrics, 1, 1, 0, /*
409 if (DEVICEP (locale))
411 add_spec_to_ghost_specifier (Vscrollbar_width,
412 make_int (GetSystemMetrics (SM_CXVSCROLL)),
413 locale, Qmswindows, Qnil);
414 add_spec_to_ghost_specifier (Vscrollbar_height,
415 make_int (GetSystemMetrics (SM_CYHSCROLL)),
416 locale, Qmswindows, Qnil);
422 /************************************************************************/
424 /************************************************************************/
427 console_type_create_scrollbar_mswindows (void)
429 CONSOLE_HAS_METHOD (mswindows, create_scrollbar_instance);
430 CONSOLE_HAS_METHOD (mswindows, free_scrollbar_instance);
431 CONSOLE_HAS_METHOD (mswindows, release_scrollbar_instance);
432 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_values);
433 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_status);
434 /* CONSOLE_HAS_METHOD (mswindows, scrollbar_width_changed_in_frame); */
435 #ifdef MEMORY_USAGE_STATS
436 CONSOLE_HAS_METHOD (mswindows, compute_scrollbar_instance_usage);
441 syms_of_scrollbar_mswindows(void)
443 DEFSUBR (Fmswindows_init_scrollbar_metrics);
447 vars_of_scrollbar_mswindows(void)
449 Fprovide (intern ("mswindows-scrollbars"));