Inside Macintosh: QuickDraw GX Printing Extensions and Drivers /

Chapter 4 - Printing Messages / Printing Messages Reference

Printing Messages / Application Messages

GXJobIdle

QuickDraw GX sends the GXJobIdle message when a printer driver, a printing extension, or an application calls the GXJobIdle function to release idle time. You can override the GXJobIdle message to obtain time from the idle procedure. Your override of the GXJobIdle message must match the following formal declaration:

OSErr MyJobIdle (void)

function result

An error code. The value noErr indicates that the operation was successful.

DESCRIPTION

You can override this message to perform tasks during idle time. The default implementation of this message gives up time to other processes.

SPECIAL CONSIDERATIONS

You never send the GXJobIdle message yourself; however, you can call the GXJobIdle function, which then sends this message.

You must forward the GXJobIdle message to other message handlers.

RESULT CODES

gxSegmentLoadFailedErr	A required code segment could not be found, or there was not enough memory to load it.
gxPrUserAbortErr	The user has canceled printing.

SEE ALSO

The GXJobIdle function is described on page 5-33 in the chapter "Printer Functions for Message Overrides."

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