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Gtk+/Gnome Application Development
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Reading Object Arguments

To get the value of one or more arguments, you simply create an array of GtkArg, filling in the name field of each GtkArg. gtk_object_getv() fills in the type fields and the argument values. If an error occurs, the type field is set to GTK_TYPE_INVALID. If the fundamental type of the returned value is GTK_TYPE_STRING, GTK_TYPE_BOXED, or GTK_TYPE_ARGS, you are responsible for freeing it.

Here's a simple example:

  GtkArg args[2];
  args[0].name = "GtkContainer::border_width";
  args[1].name = "GtkContainer::resize_mode";

  g_assert(args[0].type == GTK_TYPE_ULONG);
  g_assert(args[1].type == GTK_TYPE_RESIZE_MODE);
  g_assert(GTK_FUNDAMENTAL_TYPE(args[1].type) == GTK_TYPE_ENUM);

  printf("Border width: %lu Resize mode: %d\n", 
         GTK_VALUE_ULONG(args[0]), GTK_VALUE_ENUM(args[1]));
Gtk+/Gnome Application Development
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