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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.