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 int vert = GetWindowLong (SCROLLBAR_MSW_HANDLE (sb), GWL_STYLE) & SBS_VERT;
120 stderr_out ("[%d, %d], page = %d, pos = %d, inhibit = %d\n", new_minimum, new_maximum,
121 new_slider_size, new_slider_position,inhibit_slider_size_change);
124 /* These might be optimized, but since at least one will change at each
125 call, it's probably not worth it. */
126 SCROLLBAR_MSW_INFO (sb).nMin = new_minimum;
127 SCROLLBAR_MSW_INFO (sb).nMax = new_maximum;
128 SCROLLBAR_MSW_INFO (sb).nPage = new_slider_size + 1; /* +1 for DISABLENOSCROLL */
129 SCROLLBAR_MSW_INFO (sb).nPos = new_slider_position;
130 #ifndef VERTICAL_SCROLLBAR_DRAG_HACK
131 SCROLLBAR_MSW_INFO (sb).fMask = ((vert && vertical_drag_in_progress)
132 ? SIF_RANGE | SIF_POS
133 : SIF_ALL | SIF_DISABLENOSCROLL);
135 SCROLLBAR_MSW_INFO (sb).fMask = SIF_ALL | SIF_DISABLENOSCROLL;
137 /* Ignore XEmacs' requests to update the thumb position and size; they don't
138 * bear any relation to reality because we're reporting made-up positions */
139 if (!(vert && vertical_drag_in_progress))
141 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb),
144 UPDATE_POS_FIELD (scrollbar_x);
145 UPDATE_POS_FIELD (scrollbar_y);
146 UPDATE_POS_FIELD (scrollbar_width);
147 UPDATE_POS_FIELD (scrollbar_height);
151 MoveWindow(SCROLLBAR_MSW_HANDLE (sb),
152 new_scrollbar_x, new_scrollbar_y,
153 new_scrollbar_width, new_scrollbar_height,
159 mswindows_update_scrollbar_instance_status (struct window *w,
160 int active, int size,
161 struct scrollbar_instance *sb)
163 if (SCROLLBAR_MSW_SIZE (sb) != size)
165 SCROLLBAR_MSW_SIZE (sb) = size;
166 ShowScrollBar (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
167 SCROLLBAR_MSW_SIZE (sb));
168 SCROLLBAR_MSW_INFO(sb).fMask |= SIF_DISABLENOSCROLL;
169 SetScrollInfo(SCROLLBAR_MSW_HANDLE (sb), SB_CTL, &SCROLLBAR_MSW_INFO (sb), TRUE);
174 mswindows_handle_scrollbar_event (HWND hwnd, int code, int pos)
177 Lisp_Object win, frame;
178 struct scrollbar_instance *sb;
179 SCROLLINFO scrollinfo;
180 int vert = GetWindowLong (hwnd, GWL_STYLE) & SBS_VERT;
183 sb = (struct scrollbar_instance *)GetWindowLong (hwnd, GWL_USERDATA);
184 win = real_window (sb->mirror, 1);
185 frame = XWINDOW (win)->frame;
188 /* SB_LINEDOWN == SB_CHARLEFT etc. This is the way they will
189 always be - any Windows is binary compatible backward with
195 mswindows_enqueue_misc_user_event
196 (frame, vert ? Qscrollbar_line_down : Qscrollbar_char_right, win);
200 mswindows_enqueue_misc_user_event
201 (frame, vert ? Qscrollbar_line_up : Qscrollbar_char_left, win);
205 mswindows_enqueue_misc_user_event
206 (win, vert ? Qscrollbar_page_down : Qscrollbar_page_right,
207 vert ? Fcons (win, Qnil) : win);
211 mswindows_enqueue_misc_user_event
213 vert ? Qscrollbar_page_up : Qscrollbar_page_left,
214 vert ? Fcons (win, Qnil) : win);
218 mswindows_enqueue_misc_user_event
219 (frame, vert ? Qscrollbar_to_bottom : Qscrollbar_to_right, win);
223 mswindows_enqueue_misc_user_event
224 (frame, vert ? Qscrollbar_to_top : Qscrollbar_to_left, win);
228 case SB_THUMBPOSITION:
229 scrollinfo.cbSize = sizeof(SCROLLINFO);
230 scrollinfo.fMask = SIF_ALL;
231 GetScrollInfo (hwnd, SB_CTL, &scrollinfo);
232 vertical_drag_in_progress = vert;
233 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
234 if (vert && (scrollinfo.nTrackPos > scrollinfo.nPos))
235 /* new buffer position =
236 * buffer position at start of drag +
237 * ((text remaining in buffer at start of drag) *
238 * (amount that the thumb has been moved) /
239 * (space that remained past end of the thumb at start of drag)) */
243 (scrollinfo.nMax - scrollinfo.nPos)
244 * (scrollinfo.nTrackPos - scrollinfo.nPos))
245 / (scrollinfo.nMax - scrollinfo.nPage - scrollinfo.nPos)))
246 - 2; /* ensure that the last line doesn't disappear off screen */
249 value = scrollinfo.nTrackPos;
250 mswindows_enqueue_misc_user_event
252 vert ? Qscrollbar_vertical_drag : Qscrollbar_horizontal_drag,
253 Fcons (win, make_int (value)));
257 #ifdef VERTICAL_SCROLLBAR_DRAG_HACK
258 if (vertical_drag_in_progress)
259 /* User has just dropped the thumb - finally update it */
260 SetScrollInfo (SCROLLBAR_MSW_HANDLE (sb), SB_CTL,
261 &SCROLLBAR_MSW_INFO (sb), TRUE);
263 vertical_drag_in_progress = 0;
269 can_scroll(struct scrollbar_instance* scrollbar)
271 return scrollbar != NULL
272 && IsWindowVisible (SCROLLBAR_MSW_HANDLE (scrollbar))
273 && IsWindowEnabled (SCROLLBAR_MSW_HANDLE (scrollbar));
277 mswindows_handle_mousewheel_event (Lisp_Object frame, int keys, int delta)
279 int hasVertBar, hasHorzBar; /* Indicates presence of scroll bars */
280 unsigned wheelScrollLines = 0; /* Number of lines per wheel notch */
282 /* Find the currently selected window */
283 Lisp_Object win = FRAME_SELECTED_WINDOW (XFRAME (frame));
284 struct window* w = XWINDOW (win);
285 struct window_mirror* mirror = find_window_mirror (w);
287 /* Check that there is something to scroll */
288 hasVertBar = can_scroll (mirror->scrollbar_vertical_instance);
289 hasHorzBar = can_scroll (mirror->scrollbar_horizontal_instance);
290 if (!hasVertBar && !hasHorzBar)
293 /* No support for panning and zooming, so ignore */
294 if (keys & (MK_SHIFT | MK_CONTROL))
297 /* Get the number of lines per wheel delta */
298 SystemParametersInfo (SPI_GETWHEELSCROLLLINES, 0, &wheelScrollLines, 0);
300 /* Calculate the amount to scroll */
301 if (wheelScrollLines == WHEEL_PAGESCROLL)
303 /* Scroll by a page */
304 Lisp_Object function;
306 function = delta > 0 ? Qscrollbar_page_up : Qscrollbar_page_down;
308 function = delta > 0 ? Qscrollbar_page_left : Qscrollbar_page_right;
309 mswindows_enqueue_misc_user_event (frame, function, Fcons (win, Qnil));
311 else /* Scroll by a number of lines */
313 /* Calc the number of lines to scroll */
314 int toScroll = MulDiv (delta, wheelScrollLines, WHEEL_DELTA);
317 Lisp_Object function;
319 function = delta > 0 ? Qscrollbar_line_up : Qscrollbar_line_down;
321 function = delta > 0 ? Qscrollbar_char_left : Qscrollbar_char_right;
323 toScroll = -toScroll;
325 mswindows_enqueue_misc_user_event (frame, function, win);
331 #ifdef MEMORY_USAGE_STATS
334 mswindows_compute_scrollbar_instance_usage (struct device *d,
335 struct scrollbar_instance *inst,
336 struct overhead_stats *ovstats)
342 struct mswindows_scrollbar_data *data =
343 (struct mswindows_scrollbar_data *) inst->scrollbar_data;
345 total += malloced_storage_size (data, sizeof (*data), ovstats);
352 #endif /* MEMORY_USAGE_STATS */
354 /************************************************************************/
355 /* Device-specific ghost specifiers initialization */
356 /************************************************************************/
358 DEFUN ("mswindows-init-scrollbar-metrics", Fmswindows_init_scrollbar_metrics, 1, 1, 0, /*
362 if (DEVICEP (locale))
364 add_spec_to_ghost_specifier (Vscrollbar_width,
365 make_int (GetSystemMetrics (SM_CXVSCROLL)),
366 locale, Qmswindows, Qnil);
367 add_spec_to_ghost_specifier (Vscrollbar_height,
368 make_int (GetSystemMetrics (SM_CYHSCROLL)),
369 locale, Qmswindows, Qnil);
375 /************************************************************************/
377 /************************************************************************/
380 console_type_create_scrollbar_mswindows (void)
382 CONSOLE_HAS_METHOD (mswindows, create_scrollbar_instance);
383 CONSOLE_HAS_METHOD (mswindows, free_scrollbar_instance);
384 CONSOLE_HAS_METHOD (mswindows, release_scrollbar_instance);
385 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_values);
386 CONSOLE_HAS_METHOD (mswindows, update_scrollbar_instance_status);
387 /* CONSOLE_HAS_METHOD (mswindows, scrollbar_width_changed_in_frame); */
388 #ifdef MEMORY_USAGE_STATS
389 CONSOLE_HAS_METHOD (mswindows, compute_scrollbar_instance_usage);
394 syms_of_scrollbar_mswindows(void)
396 DEFSUBR (Fmswindows_init_scrollbar_metrics);
400 vars_of_scrollbar_mswindows(void)
402 Fprovide (intern ("mswindows-scrollbars"));