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209
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1 ;;; scrollbar.el --- Scrollbar support for XEmacs
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2
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3 ;; Copyright (C) 1995, 1997 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: XEmacs Development Team
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6 ;; Keywords: internal, extensions, dumped
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software; you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but
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16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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18 ;; General Public License for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the
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22 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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23 ;; Boston, MA 02111-1307, USA.
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24
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25 ;;; Synched up with: Not in FSF. (Completely divergent from FSF scroll-bar.el)
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26
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27 ;;; Commentary:
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28
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29 ;; This file is dumped with XEmacs (when scrollbar support is compiled in).
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30
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31 ;;; Code:
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32
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298
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33 ;; added for the options menu - dverna
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34 (defcustom scrollbars-visible-p t
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35 "Whether the scrollbars are globally visible.
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36 This variable can be customized through the options menu."
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278
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37 :type 'boolean
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298
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38 :set (lambda (var val)
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39 (set-specifier vertical-scrollbar-visible-p val)
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40 (set-specifier horizontal-scrollbar-visible-p val)
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41 (setq-default scrollbars-visible-p val))
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42 :group 'display)
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278
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43
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209
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44 (defun init-scrollbar-from-resources (locale)
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45 (when (and (featurep 'x)
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46 (or (eq locale 'global)
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47 (eq 'x (device-or-frame-type locale))))
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276
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48 (x-init-scrollbar-from-resources locale))
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49 (when (and (featurep 'mswindows)
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50 (or (eq locale 'global)
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51 (eq 'mswindows (device-or-frame-type locale))))
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52 (mswindows-init-scrollbar-metrics locale)))
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209
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53
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54 ;;
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55 ;; vertical scrollbar functions
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56 ;;
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57
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58 ;;; ### Move functions from C into Lisp here!
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59
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60 ;;
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61 ;; horizontal scrollbar functions
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62 ;;
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63
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64 (defun scrollbar-char-left (window)
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65 "Function called when the char-left arrow on the scrollbar is clicked.
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66 This is the little arrow to the left of the scrollbar. One argument is
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67 passed, the scrollbar's window. You can advise this function to
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68 change the scrollbar behavior."
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69 (when (window-live-p window)
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70 (scrollbar-set-hscroll window (- (window-hscroll window) 1))
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71 (setq zmacs-region-stays t)
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72 nil))
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73
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74 (defun scrollbar-char-right (window)
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75 "Function called when the char-right arrow on the scrollbar is clicked.
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76 This is the little arrow to the right of the scrollbar. One argument is
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77 passed, the scrollbar's window. You can advise this function to
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78 change the scrollbar behavior."
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79 (when (window-live-p window)
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80 (scrollbar-set-hscroll window (+ (window-hscroll window) 1))
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81 (setq zmacs-region-stays t)
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82 nil))
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83
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84 (defun scrollbar-page-left (window)
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85 "Function called when the user gives the \"page-left\" scrollbar action.
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86 \(The way this is done can vary from scrollbar to scrollbar.\) One argument is
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87 passed, the scrollbar's window. You can advise this function to
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88 change the scrollbar behavior."
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89 (when (window-live-p window)
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90 (scrollbar-set-hscroll window (- (window-hscroll window)
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91 (- (window-width window) 2)))
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92 (setq zmacs-region-stays t)
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93 nil))
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94
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95 (defun scrollbar-page-right (window)
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96 "Function called when the user gives the \"page-right\" scrollbar action.
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97 \(The way this is done can vary from scrollbar to scrollbar.\) One argument is
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98 passed, the scrollbar's window. You can advise this function to
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99 change the scrollbar behavior."
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100 (when (window-live-p window)
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101 (scrollbar-set-hscroll window (+ (window-hscroll window)
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102 (- (window-width window) 2)))
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103 (setq zmacs-region-stays t)
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104 nil))
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105
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106 (defun scrollbar-to-left (window)
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107 "Function called when the user gives the \"to-left\" scrollbar action.
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108 \(The way this is done can vary from scrollbar to scrollbar.\). One argument is
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109 passed, the scrollbar's window. You can advise this function to
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110 change the scrollbar behavior."
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111 (when (window-live-p window)
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112 (scrollbar-set-hscroll window 0)
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113 (setq zmacs-region-stays t)
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114 nil))
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115
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116 (defun scrollbar-to-right (window)
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117 "Function called when the user gives the \"to-right\" scrollbar action.
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118 \(The way this is done can vary from scrollbar to scrollbar.\). One argument is
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119 passed, the scrollbar's window. You can advise this function to
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120 change the scrollbar behavior."
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121 (when (window-live-p window)
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122 (scrollbar-set-hscroll window 'max)
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123 (setq zmacs-region-stays t)
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124 nil))
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125
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126 (defun scrollbar-horizontal-drag (data)
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127 "Function called when the user drags the horizontal scrollbar thumb.
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128 One argument is passed, a cons containing the scrollbar's window and a value
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129 representing how many columns the thumb is slid over. You can advise
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130 this function to change the scrollbar behavior."
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131 (let ((window (car data))
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132 (value (cdr data)))
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133 (when (and (window-live-p window) (integerp value))
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134 (scrollbar-set-hscroll window value)
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135 (setq zmacs-region-stays t)
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136 nil)))
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137
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138 ;;; scrollbar.el ends here
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