Sets up the GtkPrintOperation to wait for calling of [method@Gtk.PrintOperation.draw_page_finish from application.
This can be used for drawing page in another thread.
This function must be called in the callback of the [signal@Gtk.PrintOperation::draw-page] signal.
See Implementation
Sets up the GtkPrintOperation to wait for calling of [method@Gtk.PrintOperation.draw_page_finish from application.
This can be used for drawing page in another thread.
This function must be called in the callback of the [signal@Gtk.PrintOperation::draw-page] signal.