Sets strftime like header format strings, to be printed on the
left, center and right of the top of each page.
The strings may include strftime(3) codes which will be expanded at print time.
A subset of strftime() codes are accepted, see glib.date_time.DateTime.format
for more details on the accepted format specifiers.
Additionally the following format specifiers are accepted:
#N: the page number
#Q: the page count.
separator specifies if a solid line should be drawn to separate
the header from the document text.
If null is given for any of the three arguments, that particular
string will not be printed.
Sets strftime like header format strings, to be printed on the left, center and right of the top of each page.
The strings may include strftime(3) codes which will be expanded at print time. A subset of strftime() codes are accepted, see glib.date_time.DateTime.format for more details on the accepted format specifiers. Additionally the following format specifiers are accepted:
separator specifies if a solid line should be drawn to separate the header from the document text.
If null is given for any of the three arguments, that particular string will not be printed.
For the header to be printed, in addition to specifying format strings, you need to enable header printing with gtksource.print_compositor.PrintCompositor.setPrintHeader.
This function cannot be called anymore after the first call to the gtksource.print_compositor.PrintCompositor.paginate function.