Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Inside Macintosh: Macintosh Toolbox Essentials /

Chapter 4 - Window Manager / Window Manager Reference

Window Manager Routines / Low-Level Routines

PaintBehind
The Window Manager uses the PaintBehind procedure to redraw a series of windows in the window list.
PROCEDURE PaintBehind (startWindow: WindowPeek;
                        clobberedRgn: RgnHandle);
startWindow
A pointer to the window's complete window record.
clobberedRgn
A handle to the region that has become invalid.

DESCRIPTION
The PaintBehind procedure calls PaintOne for startWindow and all the windows behind startWindow, clipped to clobberedRgn.

ASSEMBLY-LANGUAGE INFORMATION
Because PaintBehind clears the global variable PaintWhite before calling PaintOne, clobberedRgn isn't erased. The PaintWhite global variable is reset
after the call to PaintOne.