XmPrintToFile (3) - Linux Manuals

XmPrintToFile: Retrieves and saves data that

NAME

XmPrintToFile --- Retrieves and saves data that would normally be printed by the X Print Server.

SYNOPSIS

#include <Xm/Print.h>
XtEnumXmPrintToFile(
Display*dpy,
Stringfilename,
XPFinishProcfinish_proc,
XtPointerclient_data);

DESCRIPTION

XmPrintToFile hides the details of X display connection and XpGetDocumentData to the Motif application programmer.

This function is a convenience routine that hides the details of the X and Xp internals to the application programmer by calling the XpGetDocumentData function with appropriate save and finish callbacks.

This is used in the context of X Printing when the user has specified the "print-to-file" option from a regular Print Setup Dialog box.

XmPrintToFile first tries to open the given filename for writing and returns False if it can't. Else, it uses XpGetDocumentData, giving it a save proc that writes the data received in the file and a finish proc that closes the file or removes it on an unsuccessful termination. It calls finish_proc at that point, passing it the argument received from the Xp layer (status == XPGetDocFinished means the file is valid and was closed, otherwise the file was removed).

XmPrintToFile is non-blocking; if it returns successfully, it just means the file was opened successfully, not that all the data was received.

dpy

Print display connection.

filename

Name of the file to put the print data in.

finish_proc

Called when all the data has been received.

client_data

Passed with the finish_proc.

RETURN VALUE

Returns False if the filename could not be created or opened for writing, True otherwise.

ERRORS/WARNINGS

Not applicable

EXAMPLES

A typical OK callback from a DtPrintSetupBox:

PrintOKCallback(widget...)
/*-------------*/
{   int save_data = XPSpool;

    pshell = XmPrintSetup (widget, pbs->print_screen,
                                   "Print", NULL, 0);

    XtAddCallback(pshell, XmNstartJobCallback, startJobCB, data);

    if (pbs->destination == DtPRINT_TO_FILE)
                 save_data = XPGetData;

    /* start job must precede XpGetDocumentData in XmPrintToFile */
    XpStartJob(XtDisplay(pshell), save_data);
    XFlush(XtDisplay(pshell));  /* maintain the sequence
                                 between startjob and getdocument */

    /* setup print to file */
    if (pbs->destination == DtPRINT_TO_FILE)
        XmPrintToFile(XtDisplay(pshell),
                                 pbs->dest_info, FinishPrintToFile, NULL);
    }

}

static void
startJobCB(Widget, XtPointer call_data, XtPointer client_data)
{
  print(p);   /* rendering happens here */

  XpEndJob(XtDisplay(p->print_shell));

  /* clean up */
  XtDestroyWidget(p->print_shell);
          XtCloseDisplay(XtDisplay(p->print_shell));
}