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1 ;; Scrollbar support.
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2 ;; Copyright (C) 1995 Board of Trustees, University of Illinois
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3
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4 ;; This file is part of XEmacs.
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5
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6 ;; XEmacs is free software; you can redistribute it and/or modify it
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7 ;; under the terms of the GNU General Public License as published by
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8 ;; the Free Software Foundation; either version 2, or (at your option)
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9 ;; any later version.
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10
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11 ;; XEmacs is distributed in the hope that it will be useful, but
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12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
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13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 ;; General Public License for more details.
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15
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16 ;; You should have received a copy of the GNU General Public License
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17 ;; along with XEmacs; see the file COPYING. If not, write to the Free
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18 ;; Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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19
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20 ;;; Synched up with: Not in FSF. (Completely divergent from FSF scroll-bar.el)
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21
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22 (defun init-scrollbar-from-resources (locale)
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23 (if (and (featurep 'x)
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24 (or (eq locale 'global)
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25 (eq 'x (device-or-frame-type locale)))
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26 (x-init-scrollbar-from-resources locale))))
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27
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28 ;;
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29 ;; vertical scrollbar functions
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30 ;;
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31
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32
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33 ;;
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34 ;; horizontal scrollbar functions
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35 ;;
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36
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37 (defun scrollbar-char-left (window)
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38 "Function called when the char-left arrow on the scrollbar is clicked.
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39 This is the little arrow to the left of the scrollbar. One argument is
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40 passed, the scrollbar's window. You can advise this function to
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41 change the scrollbar behavior."
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42 (if (not (window-live-p window))
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43 nil
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44 (scrollbar-set-hscroll window (- (window-hscroll window) 1))
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45 (setq zmacs-region-stays t)
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46 nil))
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47
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48 (defun scrollbar-char-right (window)
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49 "Function called when the char-right arrow on the scrollbar is clicked.
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50 This is the little arrow to the right of the scrollbar. One argument is
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51 passed, the scrollbar's window. You can advise this function to
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52 change the scrollbar behavior."
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53 (if (not (window-live-p window))
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54 nil
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55 (scrollbar-set-hscroll window (+ (window-hscroll window) 1))
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56 (setq zmacs-region-stays t)
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57 nil))
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58
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59 (defun scrollbar-page-left (window)
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60 "Function called when the user gives the \"page-left\" scrollbar action.
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61 \(The way this is done can vary from scrollbar to scrollbar.\) One argument is
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62 passed, the scrollbar's window. You can advise this function to
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63 change the scrollbar behavior."
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64 (if (not (window-live-p window))
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65 nil
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66 (scrollbar-set-hscroll window (- (window-hscroll window)
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67 (- (window-width window) 2)))
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68 (setq zmacs-region-stays t)
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69 nil))
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70
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71 (defun scrollbar-page-right (window)
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72 "Function called when the user gives the \"page-right\" scrollbar action.
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73 \(The way this is done can vary from scrollbar to scrollbar.\) One argument is
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74 passed, the scrollbar's window. You can advise this function to
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75 change the scrollbar behavior."
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76 (if (not (window-live-p window))
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77 nil
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78 (scrollbar-set-hscroll window (+ (window-hscroll window)
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79 (- (window-width window) 2)))
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80 (setq zmacs-region-stays t)
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81 nil))
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82
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83 (defun scrollbar-to-left (window)
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84 "Function called when the user gives the \"to-left\" scrollbar action.
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85 \(The way this is done can vary from scrollbar to scrollbar.\). One argument is
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86 passed, the scrollbar's window. You can advise this function to
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87 change the scrollbar behavior."
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88 (if (not (window-live-p window))
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89 nil
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90 (scrollbar-set-hscroll window 0)
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91 (setq zmacs-region-stays t)
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92 nil))
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93
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94 (defun scrollbar-to-right (window)
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95 "Function called when the user gives the \"to-right\" scrollbar action.
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96 \(The way this is done can vary from scrollbar to scrollbar.\). One argument is
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97 passed, the scrollbar's window. You can advise this function to
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98 change the scrollbar behavior."
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99 (if (not (window-live-p window))
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100 nil
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101 (scrollbar-set-hscroll window 'max)
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102 (setq zmacs-region-stays t)
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103 nil))
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104
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105 (defun scrollbar-horizontal-drag (data)
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106 "Function called when the user drags the horizontal scrollbar thumb.
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107 One argument is passed, a cons containing the scrollbar's window and a value
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108 representing how many columns the thumb is slid over. You can advise
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109 this function to change the scrollbar behavior."
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110 (let ((window (car data))
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111 (value (cdr data)))
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112 (if (not (or (window-live-p window) (integerp value)))
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113 nil
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114 (scrollbar-set-hscroll window value)
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115 (setq zmacs-region-stays t)
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116 nil)))
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