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comparison lisp/scrollbar.el @ 428:3ecd8885ac67 r21-2-22

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Import from CVS: tag r21-2-22
author cvs
date Mon, 13 Aug 2007 11:28:15 +0200
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427:0a0253eac470 428:3ecd8885ac67
1 ;;; scrollbar.el --- Scrollbar support for XEmacs
2
3 ;; Copyright (C) 1995, 1997 Free Software Foundation, Inc.
4
5 ;; Maintainer: XEmacs Development Team
6 ;; Keywords: internal, extensions, dumped
7
8 ;; This file is part of XEmacs.
9
10 ;; XEmacs is free software; you can redistribute it and/or modify it
11 ;; under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
13 ;; any later version.
14
15 ;; XEmacs is distributed in the hope that it will be useful, but
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 ;; General Public License for more details.
19
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with XEmacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
24
25 ;;; Synched up with: Not in FSF. (Completely divergent from FSF scroll-bar.el)
26
27 ;;; Commentary:
28
29 ;; This file is dumped with XEmacs (when scrollbar support is compiled in).
30
31 ;;; Code:
32
33 ;; added for the options menu - dverna
34 (defcustom scrollbars-visible-p t
35 "Whether the scrollbars are globally visible.
36 This variable can be customized through the options menu."
37 :type 'boolean
38 :set (lambda (var val)
39 (set-specifier vertical-scrollbar-visible-p val)
40 (set-specifier horizontal-scrollbar-visible-p val)
41 (setq-default scrollbars-visible-p val))
42 :group 'display)
43
44 (defun init-scrollbar-from-resources (locale)
45 (when (and (featurep 'x)
46 (or (eq locale 'global)
47 (eq 'x (device-or-frame-type locale))))
48 (x-init-scrollbar-from-resources locale))
49 (when (and (featurep 'mswindows)
50 (or (eq locale 'global)
51 (eq 'mswindows (device-or-frame-type locale))))
52 (mswindows-init-scrollbar-metrics locale)))
53
54 ;;
55 ;; vertical scrollbar functions
56 ;;
57
58 ;;; ### Move functions from C into Lisp here!
59
60 ;;
61 ;; horizontal scrollbar functions
62 ;;
63
64 (defun scrollbar-char-left (window)
65 "Function called when the char-left arrow on the scrollbar is clicked.
66 This is the little arrow to the left of the scrollbar. One argument is
67 passed, the scrollbar's window. You can advise this function to
68 change the scrollbar behavior."
69 (when (window-live-p window)
70 (scrollbar-set-hscroll window (- (window-hscroll window) 1))
71 (setq zmacs-region-stays t)
72 nil))
73
74 (defun scrollbar-char-right (window)
75 "Function called when the char-right arrow on the scrollbar is clicked.
76 This is the little arrow to the right of the scrollbar. One argument is
77 passed, the scrollbar's window. You can advise this function to
78 change the scrollbar behavior."
79 (when (window-live-p window)
80 (scrollbar-set-hscroll window (+ (window-hscroll window) 1))
81 (setq zmacs-region-stays t)
82 nil))
83
84 (defun scrollbar-page-left (window)
85 "Function called when the user gives the \"page-left\" scrollbar action.
86 \(The way this is done can vary from scrollbar to scrollbar.\) One argument is
87 passed, the scrollbar's window. You can advise this function to
88 change the scrollbar behavior."
89 (when (window-live-p window)
90 (scrollbar-set-hscroll window (- (window-hscroll window)
91 (- (window-width window) 2)))
92 (setq zmacs-region-stays t)
93 nil))
94
95 (defun scrollbar-page-right (window)
96 "Function called when the user gives the \"page-right\" scrollbar action.
97 \(The way this is done can vary from scrollbar to scrollbar.\) One argument is
98 passed, the scrollbar's window. You can advise this function to
99 change the scrollbar behavior."
100 (when (window-live-p window)
101 (scrollbar-set-hscroll window (+ (window-hscroll window)
102 (- (window-width window) 2)))
103 (setq zmacs-region-stays t)
104 nil))
105
106 (defun scrollbar-to-left (window)
107 "Function called when the user gives the \"to-left\" scrollbar action.
108 \(The way this is done can vary from scrollbar to scrollbar.\). One argument is
109 passed, the scrollbar's window. You can advise this function to
110 change the scrollbar behavior."
111 (when (window-live-p window)
112 (scrollbar-set-hscroll window 0)
113 (setq zmacs-region-stays t)
114 nil))
115
116 (defun scrollbar-to-right (window)
117 "Function called when the user gives the \"to-right\" scrollbar action.
118 \(The way this is done can vary from scrollbar to scrollbar.\). One argument is
119 passed, the scrollbar's window. You can advise this function to
120 change the scrollbar behavior."
121 (when (window-live-p window)
122 (scrollbar-set-hscroll window 'max)
123 (setq zmacs-region-stays t)
124 nil))
125
126 (defun scrollbar-horizontal-drag (data)
127 "Function called when the user drags the horizontal scrollbar thumb.
128 One argument is passed, a cons containing the scrollbar's window and a value
129 representing how many columns the thumb is slid over. You can advise
130 this function to change the scrollbar behavior."
131 (let ((window (car data))
132 (value (cdr data)))
133 (when (and (window-live-p window) (integerp value))
134 (scrollbar-set-hscroll window value)
135 (setq zmacs-region-stays t)
136 nil)))
137
138 ;;; scrollbar.el ends here