Adding callbacks
Common Printing uses the callback mechanism to inform applications of events related to the printing process. Callbacks are added to a shell using the addCallback:receiver:selector:clientData: method.
CwPrinterShell uses the following callbacks:
mapCallback
The shell has been mapped and is ready for print job production.
exposeCallback
The shell is ready to receive data for the current printer page.
resizeCallback
The shell's dimensions have been modified.
destroyCallback
The shell is about to be destroyed.
The following diagram shows the proper sequencing of printer shell job commands and callbacks.
Last modified date: 12/21/2017