query_files_async

Description:

[ Version ( since = "0.9.1" ) ]
public async void query_files_async (PicasaWebAlbum? album, Query? query, Cancellable? cancellable, owned QueryProgressCallback? progress_callback)

Queries the specified album for a list of the files which match the given query.

If album is null and a user is authenticated with the service, the user's default album will be queried. this, album and query are all reffed when this function is called, so can safely be unreffed after this function returns.

For more details, see query_files, which is the synchronous version of this function, and query_async, which is the base asynchronous query function.

Parameters:

this	a PicasaWebService
album	a PicasaWebAlbum from which to retrieve the files, or `null`
query	a Query with the query parameters, or `null`
cancellable	optional Cancellable object, or `null`
progress_callback	a QueryProgressCallback to call when an entry is loaded, or `null`
callback	a TaskReadyCallback to call when the query is finished
destroy_progress_user_data	the function to call when `progress_callback` will not be called any more, or `null`. This function will be called with `progress_user_data` as a parameter and can be used to free any memory allocated for it.
progress_user_data	data to pass to the `progress_callback` function
user_data	data to pass to the `callback` function