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

   1 /* -*-c-*-
   2  *
   3  * $Id: msg.c,v 1.11 2004/04/08 01:36:14 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
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Header files ------------------------------------------------------*/
  31
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #include <string.h>
  36
  37 #include <gtk/gtk.h>
  38
  39 #include <mLib/alloc.h>
  40 #include <mLib/dstr.h>
  41
  42 #include "cancel.h"
  43 #include "mdwfocus.h"
  44 #include "msg.h"
  45
  46 /*----- Static variables --------------------------------------------------*/
  47
  48 static int reply;
  49 static int creply;
  50
  51 /*----- Main code ---------------------------------------------------------*/
  52
  53 /* --- @msg@ --- *
  54  *
  55  * Arguments:   @const char *title@ = the title for the message box
  56  *              @const char *buttons@ = the button strings to display
  57  *              @const char *msg@ = the message skeleton string
  58  *
  59  * Returns:     Index of the button selected.
  60  *
  61  * Use:         Displays a message to the user in a nice dialogue box and
  62  *              returns the index of the button selected.
  63  *
  64  *              The @msg@ argument is a @printf@-style format string, which
  65  *              contains the message to actually be shown.  The @buttons@
  66  *              argument is a comma-separated list of buttons to be drawn,
  67  *              from right to left.  A button name can be preceded with `:'
  68  *              to indicate that it's the default, or `~' if it's the
  69  *              `cancel' button.  The return value is the zero-based index
  70  *              of the button selected.
  71  */
  72
  73 static int close(GtkWidget *w, gpointer p)
  74 {
  75   reply = creply;
  76   gtk_main_quit();
  77   return (1);
  78 }
  79
  80 static void click(GtkWidget *w, gpointer p)
  81 {
  82   reply = (int)p;
  83   gtk_main_quit();
  84 }
  85
  86 int msg(const char *title, const char *buttons, const char *msg, ...)
  87 {
  88   GtkWidget *dbox, *w;
  89
  90   /* --- Make most of the dialogue box --- */
  91
  92   dbox = gtk_dialog_new();
  93   gtk_window_set_title(GTK_WINDOW(dbox), title);
  94   gtk_signal_connect(GTK_OBJECT(dbox), "delete_event",
  95                      GTK_SIGNAL_FUNC(close), 0);
  96   gtk_box_set_homogeneous(GTK_BOX(GTK_DIALOG(dbox)->action_area), 0);
  97
  98   /* --- Set up the message string --- */
  99
 100   {
 101     dstr d = DSTR_INIT;
 102     va_list ap;
 103
 104     va_start(ap, msg);
 105     dstr_vputf(&d, msg, &ap);
 106     va_end(ap);
 107     w = gtk_label_new(d.buf);
 108     gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dbox)->vbox), w, 1, 1, 0);
 109     gtk_window_position(GTK_WINDOW(dbox), GTK_WIN_POS_MOUSE);
 110     gtk_widget_show(w);
 111     gtk_misc_set_padding(GTK_MISC(w), 16, 16);
 112     dstr_destroy(&d);
 113   }
 114
 115   /* --- Set up the buttons --- */
 116
 117   {
 118     char *p = xstrdup(buttons);
 119     unsigned f = 0;
 120     int i = 0;
 121
 122 #define f_ok 1u
 123 #define f_cancel 2u
 124 #define f_mdwfocus 4u
 125
 126     if (*p == '!') {
 127       f |= f_mdwfocus;
 128       p++;
 129     }
 130
 131     creply = -1;
 132
 133     for (p = strtok(p, ","); p; p = strtok(0, ","), i++) {
 134       unsigned ff = 0;
 135       if (*p == ':') {
 136         ff |= f_ok;
 137         p++;
 138       }
 139       if (*p == '~') {
 140         ff |= f_cancel;
 141         creply = i;
 142         p++;
 143       }
 144       w = gtk_button_new_with_label(p);
 145       GTK_WIDGET_SET_FLAGS(w, GTK_CAN_DEFAULT);
 146       gtk_box_pack_end(GTK_BOX(GTK_DIALOG(dbox)->action_area), w, 0, 0, 0);
 147       gtk_signal_connect(GTK_OBJECT(w), "clicked",
 148                          GTK_SIGNAL_FUNC(click), (gpointer)i);
 149       if (ff & f_ok)
 150         gtk_widget_grab_default(w);
 151       if (ff & f_cancel)
 152         cancel(GTK_WINDOW(dbox), w);
 153       gtk_widget_show(w);
 154     }
 155     free(p);
 156
 157     /* --- Preflight checklist --- */
 158
 159     gtk_widget_realize(dbox);
 160     if (f & f_mdwfocus)
 161       mdwfocus(dbox);
 162
 163 #undef f_ok
 164 #undef f_cancel
 165 #undef f_mdwfocus
 166   }
 167
 168   /* --- Ready --- */
 169
 170   gtk_grab_add(GTK_WIDGET(dbox));
 171   gtk_widget_show(dbox);
 172   gtk_main();
 173   gtk_grab_remove(GTK_WIDGET(dbox));
 174   gtk_widget_destroy(dbox);
 175   return (reply);
 176 }
 177
 178 /*----- That's all, folks -------------------------------------------------*/