Summary of QuickDraw GX Printing-Related Objects(IM:XP)

Inside Macintosh: QuickDraw GX Printing /: Chapter 1 - Introduction to Printing With QuickDraw GX / About QuickDraw GX Printing-Related Objects

Summary of QuickDraw GX Printing-Related Objects
Figure 1-13 shows all the QuickDraw GX printing-related objects and collection objects. In this figure, references are represented by arrows. References to job objects, however, are not shown. Note that these are objects, not structures. The order of the contents is arbitrary. You access the contents procedurally by calling functions, not by accessing fields in a data structure.
Figure 1-13 QuickDraw GX printing-related objects

Table 1-1 describes the printing-related objects.
QuickDraw GX printing-related objects (Continued)
Printing-related object Description
Job Holds the primary printing information for a document. Every printable document has a job object associated with it. The job object specifies the number of copies and a page range and includes references to one or more format objects and two printer objects.
Format Specifies page-formatting characteristics such as scaling and page dimensions and includes a reference to a paper-type object.
Paper type Specifies a paper-type name (such as "US Letter"), the physical dimensions of the paper, and the printable area within it.
Printer Represents the capabilities of a physical printer and includes a name and type, a printer driver name and type, and a reference to one or more view device objects from which you can retrieve information about the printer's characteristics.
Print file Represents the file that results from printing, such as a spool file or a portable digital document.
Job collection Contains items of information that are relevant to a print job. These items include information about how to print the document; for example, how many copies, how to collate them, paper feed options, whether the file is to be printed to disk, and file information.
Format collection Contains items of information related to printing a page from the document. It specifies the dimensions for the page, the orientation, whether a halftone should be applied, the scale, and other items related to formatting a page.
Paper-type collection Contains items of information related to the kind of paper to which the format applies. For example, it specifies the base paper type, such as US letter or legal, and the units in which the paper is measured, such as inches or millimeters.

QuickDraw GX printing-related objects (Continued)
Printing-related object	Description
`Job`	Holds the primary printing information for a document. Every printable document has a job object associated with it. The job object specifies the number of copies and a page range and includes references to one or more format objects and two printer objects.
`Format`	Specifies page-formatting characteristics such as scaling and page dimensions and includes a reference to a paper-type object.
`Paper type`	Specifies a paper-type name (such as "US Letter"), the physical dimensions of the paper, and the printable area within it.
`Printer`	Represents the capabilities of a physical printer and includes a name and type, a printer driver name and type, and a reference to one or more view device objects from which you can retrieve information about the printer's characteristics.
`Print file`	Represents the file that results from printing, such as a spool file or a portable digital document.
`Job collection`	Contains items of information that are relevant to a print job. These items include information about how to print the document; for example, how many copies, how to collate them, paper feed options, whether the file is to be printed to disk, and file information.
Format collection	Contains items of information related to printing a page from the document. It specifies the dimensions for the page, the orientation, whether a halftone should be applied, the scale, and other items related to formatting a page.
Paper-type collection	Contains items of information related to the kind of paper to which the format applies. For example, it specifies the base paper type, such as US letter or legal, and the units in which the paper is measured, such as inches or millimeters.