1 /* Define scrollbar instance.
2 Copyright (C) 1994, 1995 Board of Trustees, University of Illinois.
4 This file is part of XEmacs.
6 XEmacs is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 You should have received a copy of the GNU General Public License
17 along with XEmacs; see the file COPYING. If not, write to
18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* Synched up with: Not in FSF. */
23 #ifndef INCLUDED_scrollbar_h_
24 #define INCLUDED_scrollbar_h_
26 #ifdef HAVE_SCROLLBARS
28 struct scrollbar_instance
30 /* Used by the frame caches. */
31 struct scrollbar_instance *next;
33 /* Pointer back to the mirror structure attached to. */
34 struct window_mirror *mirror;
36 /* This flag indicates if the scrollbar is currently in use. */
37 char scrollbar_is_active;
39 /* This flag indicates if a data parameter has changed. */
40 char scrollbar_instance_changed;
42 /* A structure of auxiliary data specific to the device type.
43 struct x_scrollbar_data is used for X window frames; defined in
48 #define SCROLLBAR_INSTANCE_FRAME(inst) (inst->mirror->frame)
50 void init_frame_scrollbars (struct frame *f);
51 void init_device_scrollbars (struct device *d);
52 void init_global_scrollbars (struct device *d);
53 void free_frame_scrollbars (struct frame *f);
54 void release_window_mirror_scrollbars (struct window_mirror *mir);
55 void update_window_scrollbars (struct window *w,
56 struct window_mirror *mirror,
57 int active, int horiz_only);
58 #ifdef MEMORY_USAGE_STATS
59 int compute_scrollbar_instance_usage (struct device *d,
60 struct scrollbar_instance *inst,
61 struct overhead_stats *ovstats);
64 extern Lisp_Object Vscrollbar_width, Vscrollbar_height;
66 extern Lisp_Object Qscrollbar_line_up;
67 extern Lisp_Object Qscrollbar_line_down;
68 extern Lisp_Object Qscrollbar_page_up;
69 extern Lisp_Object Qscrollbar_page_down;
70 extern Lisp_Object Qscrollbar_to_top;
71 extern Lisp_Object Qscrollbar_to_bottom;
72 extern Lisp_Object Qscrollbar_vertical_drag;
74 extern Lisp_Object Qscrollbar_char_left;
75 extern Lisp_Object Qscrollbar_char_right;
76 extern Lisp_Object Qscrollbar_page_left;
77 extern Lisp_Object Qscrollbar_page_right;
78 extern Lisp_Object Qscrollbar_to_left;
79 extern Lisp_Object Qscrollbar_to_right;
80 extern Lisp_Object Qscrollbar_horizontal_drag;
82 #endif /* HAVE_SCROLLBARS */
84 #endif /* INCLUDED_scrollbar_h_ */