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1 ;; Dialog-box support.
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2 ;; Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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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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16
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17 ;; along with XEmacs; see the file COPYING. If not, write to the
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70
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18 ;; Free Software Foundation, 59 Temple Place - Suite 330,
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19 ;; Boston, MA 02111-1307, USA.
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0
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20
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21 ;;; Synched up with: Not in FSF.
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22
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23 (defun yes-or-no-p-dialog-box (prompt)
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24 "Ask user a \"y or n\" question with a popup dialog box.
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25 Returns t if answer is \"yes\".
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26 Takes one argument, which is the string to display to ask the question."
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27 (let ((echo-keystrokes 0)
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28 event)
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29 (popup-dialog-box
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30 ;; "Non-violent language please!" says Robin.
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31 (cons prompt '(["Yes" yes t] ["No" no t] nil ["Cancel" abort t])))
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32 ; (cons prompt '(["Yes" yes t] ["No" no t] nil ["Abort" abort t])))
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33 (catch 'ynp-done
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34 (while t
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35 (setq event (next-command-event event))
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36 (cond ((and (misc-user-event-p event) (eq (event-object event) 'yes))
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37 (throw 'ynp-done t))
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38 ((and (misc-user-event-p event) (eq (event-object event) 'no))
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39 (throw 'ynp-done nil))
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40 ((and (misc-user-event-p event)
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41 (or (eq (event-object event) 'abort)
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42 (eq (event-object event) 'menu-no-selection-hook)))
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43 (signal 'quit nil))
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44 ((button-release-event-p event) ;; don't beep twice
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45 nil)
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46 (t
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47 (beep)
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48 (message "please answer the dialog box")))))))
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49
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50 (defun yes-or-no-p-maybe-dialog-box (prompt)
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51 "Ask user a yes-or-no question. Return t if answer is yes.
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52 The question is asked with a dialog box or the minibuffer, as appropriate.
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53 Takes one argument, which is the string to display to ask the question.
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54 It should end in a space; `yes-or-no-p' adds `(yes or no) ' to it.
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55 The user must confirm the answer with RET,
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56 and can edit it until it as been confirmed."
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57 (if (should-use-dialog-box-p)
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58 (yes-or-no-p-dialog-box prompt)
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59 (yes-or-no-p-minibuf prompt)))
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60
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61 (defun y-or-n-p-maybe-dialog-box (prompt)
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62 "Ask user a \"y or n\" question. Return t if answer is \"y\".
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63 Takes one argument, which is the string to display to ask the question.
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64 The question is asked with a dialog box or the minibuffer, as appropriate.
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65 It should end in a space; `y-or-n-p' adds `(y or n) ' to it.
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66 No confirmation of the answer is requested; a single character is enough.
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67 Also accepts Space to mean yes, or Delete to mean no."
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68 (if (should-use-dialog-box-p)
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69 (yes-or-no-p-dialog-box prompt)
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70 (y-or-n-p-minibuf prompt)))
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71
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72 (if (fboundp 'popup-dialog-box)
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73 (progn
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74 (fset 'yes-or-no-p 'yes-or-no-p-maybe-dialog-box)
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75 (fset 'y-or-n-p 'y-or-n-p-maybe-dialog-box)))
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76
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77 ;; this is call-compatible with the horribly-named FSF Emacs function
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78 ;; `x-popup-dialog'. I refuse to use that name.
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79 (defun get-dialog-box-response (position contents)
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80 ;; by Stig@hackvan.com
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81 ;; modified by pez@atlantic2.sbi.com
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82 "Pop up a dialog box and return user's selection.
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83 POSITION specifies which frame to use.
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84 This is normally an event or a window or frame.
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85 If POSITION is t or nil, it means to use the frame the mouse is on.
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86 The dialog box appears in the middle of the specified frame.
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87
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88 CONTENTS specifies the alternatives to display in the dialog box.
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89 It is a list of the form (TITLE ITEM1 ITEM2...).
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90 Each ITEM is a cons cell (STRING . VALUE).
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91 The return value is VALUE from the chosen item.
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92
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93 An ITEM may also be just a string--that makes a nonselectable item.
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94 An ITEM may also be nil--that means to put all preceding items
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95 on the left of the dialog box and all following items on the right."
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96 (cond
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97 ((eventp position)
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98 (select-frame (event-frame position)))
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99 ((framep position)
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100 (select-frame position))
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101 ((windowp position)
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102 (select-window position)))
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103 (let ((dbox (cons (car contents)
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104 (mapcar #'(lambda (x)
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105 (cond
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106 ((null x)
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107 nil)
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108 ((stringp x)
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109 `[,x 'ignore nil]) ;this will never get
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110 ;selected
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111 (t
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112 `[,(car x) (throw 'result ',(cdr x)) t])))
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113 (cdr contents))
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114 )))
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115 (catch 'result
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116 (popup-dialog-box dbox)
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117 (dispatch-event (next-command-event)))))
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118
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119 (defun message-box (fmt &rest args)
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120 "Display a message, in a dialog box if possible.
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121 If the selected device has no dialog-box support, use the echo area.
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122 The arguments are the same as to `format'.
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123
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124 If the only argument is nil, clear any existing message; let the
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125 minibuffer contents show."
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126 (if (and (null fmt) (null args))
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127 (progn
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128 (clear-message nil)
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129 nil)
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130 (let ((str (apply 'format fmt args)))
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131 (if (device-on-window-system-p)
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132 (get-dialog-box-response nil (list str (cons "OK" t)))
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133 (display-message 'message str))
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134 str)))
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135
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136 (defun message-or-box (fmt &rest args)
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137 "Display a message in a dialog box or in the echo area.\n\
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138 If this command was invoked with the mouse, use a dialog box.\n\
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139 Otherwise, use the echo area.
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140 The arguments are the same as to `format'.
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141
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142 If the only argument is nil, clear any existing message; let the
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143 minibuffer contents show."
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144 (if (should-use-dialog-box-p)
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145 (apply 'message-box fmt args)
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146 (apply 'message fmt args)))
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