使用 GFile 异步复制文件并显示进度

/* gfile-copy.c
 * Heiher <admin@heiher.info>
 */
 
#include <gtk/gtk.h>
#include <gio/gio.h>
 
static gboolean timeout_handler(gpointer user_data)
{
	gtk_main_quit();
 
	return FALSE;
}
 
static void g_file_copy_progress_handler(goffset current_num_bytes,
			goffset total_num_bytes, gpointer user_data)
{
	GtkProgressBar *progress_bar = GTK_PROGRESS_BAR(user_data);
	gchar buf[1024] = { 0 };
 
	g_sprintf(buf, "%ld KB / %ld KB", current_num_bytes / 1024,
				total_num_bytes / 1024);
	gtk_progress_bar_set_text(progress_bar, buf);
	gtk_progress_bar_set_fraction(progress_bar, (gdouble)current_num_bytes / (gdouble)total_num_bytes);
}
 
static void g_file_copy_async_ready_handler(GObject *source_object,
			GAsyncResult *res, gpointer user_data)
{
	GtkProgressBar *progress_bar = GTK_PROGRESS_BAR(user_data);
 
	g_file_copy_finish(G_FILE(source_object), res, NULL);
	gtk_progress_bar_set_text(progress_bar, "Finished");
	gtk_progress_bar_set_fraction(progress_bar, 1.0);
 
	g_timeout_add_seconds(2, timeout_handler, NULL);
}
 
int main(int argc, char *argv[])
{
	GtkWidget *window = NULL;
	GtkWidget *progress_bar = NULL;
	GFile *src = NULL, *dst = NULL;
 
	gtk_init(&argc, &argv);
 
	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
	gtk_widget_set_size_request(window, 400, 30);
	gtk_widget_show(window);
 
	progress_bar = gtk_progress_bar_new();
	gtk_container_add(GTK_CONTAINER(window),
				progress_bar);
	gtk_widget_show(progress_bar);
 
	src = g_file_new_for_path("/tmp/src.img");
	dst = g_file_new_for_path("/tmp/dst.img");
 
	g_file_copy_async(src, dst, G_FILE_COPY_OVERWRITE,
				G_PRIORITY_DEFAULT, NULL, g_file_copy_progress_handler,
				progress_bar, g_file_copy_async_ready_handler, progress_bar);
 
	gtk_main();
 
	return 0;
}

gcc -o gfile-copy gfile-copy.c `pkg-config --cflags --libs gtk+-2.0 gio-2.0`
./gfile-copy