State Diagram

PrintPRO™ enables the application to select a printer, perform printer set up, create a print job, preview the print job, and send the print job to the printing device. These tasks can be illustrated with a state diagram:

No Session in Progress

The application is free to initiate printer selection, printer set up, print job creation, or raw data transfer.

Printer Selection

Once PrintPRO has been created, the application may choose to select a printer. If no printer is selected, the default printer will be used. While a print job is in progress, the printer selection cannot be modified.

Printer SetUp

The application may chose to set up the printer, using either PrintPRO or the printer dialog. If no printer setup is conducted, the printer's default settings will be in effect. While a print job is in progress, the printer settings cannot be modified.

Send Raw Data

To bypass the print driver, the application can send raw data directly to the printer. Since the printer driver is by-passed, the data sent must be printer specific. The raw data may contain printer commands, codes and binary data. Large amounts of data may be sent to the printer using this technique.

Print Job Creation

The application calls PrintPRO methods to construct the document to be printed. Images, text, and drawings can be added to the print job.

Print Preview

At any point during job creation, the application can invoke a print preview to enable the user to view or print the page under construction.

Print Job Has Been Sent

Once the document or raw data to be sent has been finalized, the application calls EndPrintDoc or PrintRawDataEnd to send the print job to the printer spooler. PrintPRO is now done processing the job, and returns to a "No Session in Progress" state.