我正在使用 GTK 创建一个简单的文件查看器,并且我想异步加载新目录,以防止在加载时挂起整个程序。
在 GIO API 中有一个g_file_enumerator_next_files_async
功能,允许异步加载块中的文件。但是我怎么知道目录列表何时完成?这是我想出的代码示例:
static void add_file_callback(GObject *direnum,
GAsyncResult *result,
gpointer user_data){
GError *error = NULL;
GList *file_list = g_file_enumerator_next_files_finish(
G_FILE_ENUMERATOR(direnum),
result, &error);
if( file_list == NULL ){
g_critical("Unable to add files to list, error: %s", error->message);
}
GList *next;
GFileInfo *info;
GtkTreeIter iter;
DirList *list = (DirList*)user_data;
while(file_list){
...add file to list
}
}
int read_dir(const gchar *path, DirList *list){
g_assert(list != NULL && list->store != NULL);
GtkTreeIter iter;
gtk_list_store_clear(list->store);
list->path = path;
GFile *dir = g_file_new_for_path(path);
GFileEnumerator *dirent = g_file_enumerate_children(dir,
"*",
G_FILE_QUERY_INFO_NOFOLLOW_SYMLINKS,
NULL,
NULL);
while( TRUE ){ /* <============================== When to end? */
g_file_enumerator_next_files_async(dirent,
BLOCK_SIZE,
G_PRIORITY_DEFAULT,
NULL,
add_file_callback,
list);
}
g_file_enumerator_close(dirent, NULL, NULL);
g_object_unref(dirent);
g_object_unref(dir);
return 0;
}