Legacy Document

Inside Macintosh: Cyberdog Programmer's Kit / Part 3 - Cyberdog Reference

Chapter 7 - Classes and Methods / CyberOpenerPartExtension

OpenFile

Opens a file that contains a Cyberdog item's downloaded content.

void OpenFile (in CyberItem item, 
in FSSpecPtr file, 
in ParameterSet openParams);

item

The CyberItem object that is being opened.

file

The file specification of the file that contains the Cyberdog item's downloaded content.

openParams

The parameter set associated with the opening process.

DISCUSSION

This method may be called during a Cyberdog item's opening process. If a Cyberdog item is unable to create a Cyberdog display part for the data it references, it can create a download part to download the data and save it to disk. The Cyberdog download part calls this method after downloading and saving to a file a Cyberdog item that was passed to its OpenCyberItem method. The specified file contains the Cyberdog item's downloaded content. The opener part attempts to find an OpenDoc part editor for the file according to its file type.

• If an appropriate OpenDoc part editor is available, the opener part creates a new part. Then, the opener part calls its own OpenPart method. The specified file is bound to the part editor.
• If an appropriate OpenDoc part editor is not available, a new part cannot be created. The opener part sends an Apple event to the Finder process telling it to open the file.

If you subclass CyberOpenerPartExtension, you must override this method. Your override must not call its inherited method; that is, your override method must implement this method's functionality completely.

SEE ALSO

The OpenPart method (page 275).
The CyberPartExtension::OpenCyberItem method (page 290).