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Some docs for printing asynchronously.

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This commit is contained in:
Matthias Melcher 2022-05-31 17:23:16 +02:00
parent 23d0a631cf
commit bcbdf5546f
1 changed files with 14 additions and 0 deletions
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14
src/Fl_Paged_Device.cxx
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@ -41,6 +41,14 @@ int Fl_Paged_Device::begin_job(int pagecount, int *frompage, int *topage, char *
The page coordinates are initially in points, i.e., 1/72 inch,
and with origin at the top left of the printable page area.
This function also makes this surface the current drawing surface with Fl_Surface_Device::push_current().
\note begin_page() calls Fl_Surface_Device::push_current() and leaves this
device as the active surface. If any calls between begin_page() and end_page()
open dialog boxes or will otherwise draw into FLTK windows, those calls must
be put between a call to Fl_Surface_Device::pop_current()
and a call to Fl_Surface_Device::push_current(), or the content of the dialog
box will be rendered to the printer instead of the screen.
\return 0 if OK, non-zero if any error
*/
int Fl_Paged_Device::begin_page (void) {return 1;}
@ -85,6 +93,12 @@ void Fl_Paged_Device::rotate(float angle) {}
\brief To be called at the end of each page.
This function also stops this surface from being the current drawing surface with Fl_Surface_Device::pop_current().
\note end_page() calls Fl_Surface_Device::pop_current().
If any calls between begin_page() and end_page()
open dialog boxes or will otherwise draw into FLTK windows, those calls must
be put between a call to Fl_Surface_Device::pop_current()
and a call to Fl_Surface_Device::push_current().
\return 0 if OK, non-zero if any error.
*/
int Fl_Paged_Device::end_page (void) {return 1;}