now-playing-d.c

   1 /* now-playing-d.c
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17
  18 #include <stdio.h>
  19 #include <gtk/gtk.h>
  20 #include "eggtrayicon.h"
  21
  22
  23 gchar* playing[2];
  24 int playing_i = 0;
  25
  26
  27 // this gets called regularly by gtk
  28 gboolean
  29 stdin_callback(GIOChannel *channel, GIOCondition cond, gpointer data) {
  30         GtkWidget *widget;
  31         GIOStatus ret;
  32         gsize length;
  33         gsize terminator_pos;
  34         GError *error = NULL;
  35
  36         widget = GTK_WIDGET(data);
  37
  38         if (widget->window == NULL) {
  39                 return FALSE;
  40         }
  41
  42         ret = g_io_channel_read_line(
  43                 channel,
  44                 &(playing[playing_i]),
  45                 &length,
  46                 &terminator_pos,
  47                 &error);
  48
  49         if (ret == G_IO_STATUS_ERROR) {
  50                 g_error ("Error reading: %s\n", error->message);
  51                 gtk_exit(2);
  52         }
  53         if (length == 0) {
  54                 gtk_exit(0);
  55         }
  56
  57         // remove terminator
  58         if(terminator_pos) {
  59                 playing[playing_i][terminator_pos] = 0;
  60         }
  61
  62
  63         if(strcmp(playing[0], playing[1])) {
  64                 gtk_label_set_text(GTK_LABEL(widget), playing[playing_i]);
  65         }
  66
  67         playing_i = 1 - playing_i;
  68         g_free(playing[playing_i]);
  69
  70         // gtk_widget_queue_draw(widget);
  71         return TRUE;
  72 }
  73
  74
  75 int
  76 main(int argc, char *argv[]) {
  77         GtkWidget *label;
  78         EggTrayIcon *egg;
  79         GIOChannel *channel;
  80
  81         // initialize GTK
  82         gtk_set_locale();
  83         gtk_init(&argc, &argv);
  84
  85         // initialize globals
  86         playing_i = 0;
  87         playing[1] = g_strdup("");
  88
  89         // make the widget
  90         label = gtk_label_new("");
  91         egg = egg_tray_icon_new("what's this string do?");
  92         // nest and display the widget
  93         gtk_container_add(GTK_CONTAINER(egg), label);
  94         gtk_widget_show_all(GTK_WIDGET(egg));
  95
  96         // watch stdin
  97         channel = g_io_channel_unix_new(fileno(stdin));
  98         g_io_channel_set_encoding(channel, NULL, NULL); // kiss
  99         g_io_add_watch(channel, G_IO_IN, stdin_callback, (gpointer)label);
 100
 101         gtk_main();
 102 }