mdw@git.distorted.org.uk Git - mgLib/blob - msg.c

   1 /* -*-c-*-
   2  *
   3  * $Id: msg.c,v 1.5 1999/05/05 18:52:45 mdw Exp $
   4  *
   5  * Display a message and get an answer
   6  *
   7  * (c) 1998 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of the mgLib GTK utilities library.
  13  *
  14  * mgLib is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * mgLib is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with mgLib; if not, write to the Free Software
  26  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Revision history --------------------------------------------------*
  30  *
  31  * $Log: msg.c,v $
  32  * Revision 1.5  1999/05/05 18:52:45  mdw
  33  * Change licensing conditions to LGPL.
  34  *
  35  * Revision 1.4  1999/04/29 20:48:13  mdw
  36  * Add documentation for `msg'.
  37  *
  38  * Revision 1.3  1999/03/25 23:36:10  mdw
  39  * Compile to nothing in absence of GTK, for the benefit of parent packages
  40  * which contain non-GTK-dependent parts.
  41  *
  42  * Revision 1.2  1998/12/15 23:48:06  mdw
  43  * Use `dstr_putf' for formatting, rather than `sprintf'.
  44  *
  45  * Revision 1.1  1998/12/11 09:44:21  mdw
  46  * Initial version.
  47  *
  48  */
  49
  50 #ifdef HAVE_GTK
  51
  52 /*----- Header files ------------------------------------------------------*/
  53
  54 #include <stdarg.h>
  55 #include <stdio.h>
  56 #include <stdlib.h>
  57 #include <string.h>
  58
  59 #include <gtk/gtk.h>
  60
  61 #include <mLib/alloc.h>
  62 #include <mLib/dstr.h>
  63
  64 #include "cancel.h"
  65 #include "mdwfocus.h"
  66 #include "msg.h"
  67
  68 /*----- Static variables --------------------------------------------------*/
  69
  70 static int reply;
  71 static int creply;
  72
  73 /*----- Main code ---------------------------------------------------------*/
  74
  75 /* --- @msg@ --- *
  76  *
  77  * Arguments:   @char *buttons@ = the button strings to display
  78  *              @char *msg@ = the message skeleton string
  79  *
  80  * Returns:     Index of the button selected.
  81  *
  82  * Use:         Displays a message to the user in a nice dialogue box and
  83  *              returns the index of the button selected.
  84  *
  85  *              The @msg@ argument is a @printf@-style format string, which
  86  *              contains the message to actually be shown.  The @buttons@
  87  *              argument is a comma-separated list of buttons to be drawn,
  88  *              from right to left.  A button name can be preceded with `:'
  89  *              to indicate that it's the default, or `~' if it's the
  90  *              `cancel' button.  The return value is the zero-based index
  91  *              of the button selected.
  92  */
  93
  94 static int close(GtkWidget *w, gpointer p)
  95 {
  96   reply = creply;
  97   gtk_main_quit();
  98   return (1);
  99 }
 100
 101 static void click(GtkWidget *w, gpointer p)
 102 {
 103   reply = (int)p;
 104   gtk_main_quit();
 105 }
 106
 107 int msg(const char *buttons, const char *msg, ...)
 108 {
 109   GtkWidget *dbox, *w;
 110
 111   /* --- Make most of the dialogue box --- */
 112
 113   dbox = gtk_dialog_new();
 114   gtk_signal_connect(GTK_OBJECT(dbox), "delete_event",
 115                      GTK_SIGNAL_FUNC(close), 0);
 116   gtk_box_set_homogeneous(GTK_BOX(GTK_DIALOG(dbox)->action_area), 0);
 117
 118   /* --- Set up the message string --- */
 119
 120   {
 121     dstr d;
 122     va_list ap;
 123
 124     va_start(ap, msg);
 125     dstr_create(&d);
 126     dstr_vputf(&d, msg, ap);
 127     va_end(ap);
 128     w = gtk_label_new(d.buf);
 129     gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dbox)->vbox), w, 1, 1, 0);
 130     gtk_window_position(GTK_WINDOW(dbox), GTK_WIN_POS_MOUSE);
 131     gtk_widget_show(w);
 132     gtk_misc_set_padding(GTK_MISC(w), 16, 16);
 133     dstr_destroy(&d);
 134   }
 135
 136   /* --- Set up the buttons --- */
 137
 138   {
 139     char *p = xstrdup(buttons);
 140     unsigned f = 0;
 141     int i = 0;
 142
 143     enum {
 144       f_ok = 1,
 145       f_cancel = 2,
 146       f_mdwfocus = 4
 147     };
 148
 149     if (*p == '!') {
 150       f |= f_mdwfocus;
 151       p++;
 152     }
 153
 154     creply = -1;
 155
 156     for (p = strtok(p, ","); p; p = strtok(0, ","), i++) {
 157       unsigned ff = 0;
 158       if (*p == ':') {
 159         ff |= f_ok;
 160         p++;
 161       }
 162       if (*p == '~') {
 163         ff |= f_cancel;
 164         creply = i;
 165         p++;
 166       }
 167       w = gtk_button_new_with_label(p);
 168       GTK_WIDGET_SET_FLAGS(w, GTK_CAN_DEFAULT);
 169       gtk_box_pack_end(GTK_BOX(GTK_DIALOG(dbox)->action_area), w, 0, 0, 0);
 170       gtk_signal_connect(GTK_OBJECT(w), "clicked",
 171                          GTK_SIGNAL_FUNC(click), (gpointer)i);
 172       if (ff & f_ok)
 173         gtk_widget_grab_default(w);
 174       if (ff & f_cancel)
 175         cancel(GTK_WINDOW(dbox), w);
 176       gtk_widget_show(w);
 177     }
 178     free(p);
 179
 180     /* --- Preflight checklist --- */
 181
 182     gtk_widget_realize(dbox);
 183     if (f & f_mdwfocus)
 184       mdwfocus(dbox);
 185
 186   }
 187
 188   /* --- Ready --- */
 189
 190   gtk_grab_add(GTK_WIDGET(dbox));
 191   gtk_widget_show(dbox);
 192   gtk_main();
 193   gtk_grab_remove(GTK_WIDGET(dbox));
 194   gtk_widget_destroy(dbox);
 195   return (reply);
 196 }
 197
 198 /*----- That's all, folks -------------------------------------------------*/
 199
 200 #else
 201   int mgLib_msg = 0;
 202 #endif