Asynchronously gets the requested information about specified this.
The result is a FileInfo object that contains key-value attributes (such as type or size for the file).
For more details, see query_info which is the synchronous version of this call.
When the operation is finished, callback will be called. You can then call query_info_async.end
to get the result of the operation.
Example: FileInfo, async:
public static int main (string[] args) {
if (args.length != 2) {
print ("%s FILE\n", args[0]);
return 0;
}
MainLoop loop = new MainLoop ();
File file = File.new_for_commandline_arg (args[1]);
file.query_info_async.begin ("standard::icon", 0, Priority.DEFAULT, null, (obj, res) => {
try {
FileInfo info = file.query_info_async.end (res);
Icon icon = info.get_icon ();
print ("%s\n", icon.to_string ());
} catch (Error e) {
print ("Error: %s\n", e.message);
}
loop.quit ();
});
loop.run ();
return 0;
}valac --pkg gio-2.0 GLib.File.query_info_async.vala| this |
input File |
| attributes |
an attribute query string |
| flags |
a set of FileQueryInfoFlags |
| io_priority |
the I/O priority of the request |
| cancellable |
optional Cancellable object, null to ignore |
| callback |
a TaskReadyCallback to call when the request is satisfied |
| user_data |
the data to pass to callback function |