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1 ;;; gui.el --- Basic GUI functions for XEmacs.
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2 ;; Copyright (C) 1996 Ben Wing
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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 (defvar dialog-frame-plist '(width 60 height 20)
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21 "Plist of frame properties for initially creating a dialog frame.
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22 Properties specified here supersede the values given in
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23 `default-frame-plist'.")
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24
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25 (defun make-dialog-frame (&optional props parent)
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26 "Create a frame suitable for use as a dialog box.
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27 The frame is made a child of PARENT (defaults to the selected frame),
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28 and has additional properties PROPS, as well as `dialog-frame-plist'.
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29 Normally it also has no modelines, menubars, or toolbars."
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30 (or parent (setq parent (selected-frame)))
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31 (let* ((ftop (frame-property parent 'top))
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32 (fleft (frame-property parent 'left))
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33 (fwidth (frame-pixel-width parent))
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34 (fheight (frame-pixel-height parent))
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35 (fonth (font-height (face-font 'default)))
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36 (fontw (font-width (face-font 'default)))
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37 (props (append props dialog-frame-plist))
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38 (dfheight (plist-get props 'height))
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39 (dfwidth (plist-get props 'width))
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40 ;; under FVWM at least, if I don't specify the initial position,
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41 ;; it ends up always at (0, 0). xwininfo doesn't tell me
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42 ;; that there are any program-specified position hints, so
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43 ;; it must be an FVWM bug. So just be smashing and position
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44 ;; in the center of the selected frame.
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45 (frame (make-frame
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46 (append props
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47 `(popup ,parent initially-unmapped t
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48 menubar-visible-p nil
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49 has-modeline-p nil
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50 default-toolbar-visible-p nil
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51 modeline-shadow-thickness 0
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52 left ,(+ fleft (- (/ fwidth 2)
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53 (/ (* dfwidth fontw)
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54 2)))
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55 top ,(+ ftop (- (/ fheight 2)
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56 (/ (* dfheight fonth)
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57 2))))))))
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58 (set-face-foreground 'modeline [default foreground] frame)
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59 (set-face-background 'modeline [default background] frame)
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60 (make-frame-visible frame)
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61 frame))
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62
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63 (defvar gui-button-shadow-thickness 2)
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64
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65 (defun gui-button-p (object)
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66 "True if OBJECT is a GUI button."
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67 (and (vectorp object)
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68 (> (length object) 0)
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69 (eq 'gui-button (aref object 0))))
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70
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71 (make-face 'gui-button-face "Face used for gui buttons")
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72 (if (not (face-differs-from-default-p 'gui-button-face))
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73 (progn
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74 (set-face-background 'gui-button-face "grey75")
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75 (set-face-foreground 'gui-button-face "black")))
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76
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77 (defun make-gui-button (string &optional action user-data)
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78 "Make a GUI button whose label is STRING and whose action is ACTION.
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79 If the button is inserted in a buffer and then clicked on, and ACTION
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80 is non-nil, ACTION will be called with one argument, USER-DATA."
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81 (vector 'gui-button
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82 (if (featurep 'xpm)
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83 (xpm-button-create
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84 string gui-button-shadow-thickness
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85 (color-instance-name (face-foreground-instance 'gui-button-face))
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86 (color-instance-name (face-background-instance 'gui-button-face)))
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87 (xbm-button-create string gui-button-shadow-thickness))
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88 action user-data))
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89
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90 (defun insert-gui-button (button &optional pos buffer)
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91 "Insert GUI button BUTTON at POS in BUFFER."
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92 (check-argument-type 'gui-button-p button)
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93 (let ((annotation
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94 (make-annotation (make-glyph (car (aref button 1)))
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95 pos 'text buffer nil
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96 (make-glyph (cadr (aref button 1)))))
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97 (action (aref button 2)))
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98 (and action
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99 (progn
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100 (set-annotation-action annotation action)
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101 (set-annotation-data annotation (aref button 3))))))
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