Inside Macintosh: QuickDraw GX Printing Extensions and Drivers /

Chapter 4 - Printing Messages / Printing Messages Reference

Printing Messages / Application Messages

GXPrintPage

QuickDraw GX sends the GXPrintPage message when the data for a page is ready to be spooled. You can override the GXPrintPage message to modify data sent by an application for printing. Your override of the GXPrintPage message must match the following formal declaration:

void MyPrintPage (gxFormat aFormat, gxShape aPage);

aFormat

The format object for the page.

aPage

The data that belongs on the page in the form of a picture shape.

DESCRIPTION

QuickDraw GX sends this message when an application call the GXPrintPage function to print a page.

You rarely need to override this message. If you wish to modify the data that the application sends, it is preferable to override the GXSpoolPage message. This works
for applications that use GXPrintPage for printing and also for those that use the GXStartPage/GXDrawShape/GXFinishPage sequence for printing.

SPECIAL CONSIDERATIONS

You never send the GXPrintPage message yourself.

You must forward the GXPrintPage message to other message handlers.

SEE ALSO

The GXPrintPage function is described in Inside Macintosh: QuickDraw GX Printing.

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