Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Inside Macintosh: Imaging With QuickDraw /

Chapter 4 - Color QuickDraw / Color QuickDraw Reference

Color QuickDraw Routines / Reporting Data Structure Changes to QuickDraw

CTabChanged
If you modify the content of a ColorTable record (described on page 4-47), use the CTabChanged procedure.
PROCEDURE CTabChanged (ctab: CTabHandle);
ctab
A handle to the ColorTable record changed by your application.

DESCRIPTION
For the ColorTable record you specify in the ctab parameter, the CTabChanged procedure calls the Color Manager function GetCTSeed to get a new seed (that is, a new, unique identifier in the ctSeed field of the ColorTable record) and notifies Color QuickDraw of the change.

SPECIAL CONSIDERATIONS
The CTabChanged procedure may move or purge memory in the application heap. Your application should not call the CTabChanged procedure at interrupt time.
Your application should never need to directly modify a ColorTable record and use the CTabChanged procedure; instead, your application should use the QuickDraw routines described in this book for manipulating the values in a ColorTable record.

ASSEMBLY-LANGUAGE INFORMATION
The trap macro and routine selector for the CTabChanged procedure are
Trap macro Selector
_QDExtensions $00040007

SEE ALSO
The GetCTSeed function is described in the chapter "Color Manager" in Advanced Color Imaging on the Mac OS.