Inside Macintosh: Macintosh Toolbox Essentials /

Chapter 4 - Window Manager / Window Manager Reference

Window Manager Routines / Low-Level Routines

CalcVis

The Window Manager uses the CalcVis procedure to calculate the visible region
of a window.

PROCEDURE CalcVis (window: WindowPeek);

window

A pointer to the window's complete window record.

DESCRIPTION

The CalcVis procedure calculates the visible region of the specified window by starting with its content region and subtracting the structure region of each window in front of it.