How to tell if a document is being printed

To determine if you are printing to the printer, you need to check inside the draw routine for every drawable view where you expect printing to make a difference. The TPrintingFlagSnapshot class gives you access to the printing flag in the Grafport.

The following example shows how to check for printing:

  TPrintingFlagSnapshot areWePrinting(port); // port is Grafport passed to the draw call.
  
  // Then every place you need to know ...
  if (areWePrinting.IsPrintingPort()) {
      // Write the code to use when printing here
  }
  else {
      // Write the code when not printing here
  }