open_async
Description:
Warning: open_async is deprecated.
Open the calendar asynchronously.
The calendar will emit the "cal_opened" signal when the operation has completed. Since 3.0 is emitted also "cal_opened_ex" signal, which contains a GError pointer from the open operation (NULL when no error occurred). New signal deprecates the old "cal_opened" signal.
Parameters:
| only_if_exists |
If TRUE, then only open the calendar if it already exists. If FALSE, then create a new calendar if it doesn't already exist. |