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Mac OS 8 Window Manager Reference

Window Region Constants

You can pass constants of type WindowRegionCode in the inRegionCode parameter of GetWindowRegion to obtain a handle to a specific window region. The WindowRegionCode constants are available with Appearance Manager 1.0 and later.

Figure 1-2 illustrates the location of these regions in a window.

enum {                  
    kWindowTitleBarRgn      = 0,
    kWindowTitleTextRgn     = 1,
    kWindowCloseBoxRgn      = 2,
    kWindowZoomBoxRgn       = 3,
    kWindowDragRgn          = 5,
    kWindowGrowRgn          = 6,
    kWindowCollapseBoxRgn   = 7,
    kWindowStructureRgn     = 32,
    kWindowContentRgn       = 33
};
typedef UInt16 WindowRegionCode;

Constant descriptions

kWindowTitleBarRgn
The entire area occupied by a window's title bar, including the title text region.
kWindowTitleTextRgn
That portion of a window's title bar that is occupied by the name of the window.
kWindowCloseBoxRgn
The area occupied by a window's close box.
kWindowZoomBoxRgn
The area occupied by a window's zoom box.
kWindowDragRgn
The draggable area of the window frame; this area includes the title bar and window outline and excludes the size box, close box, zoom box, and collapse box.
kWindowGrowRgn
The area occupied by a window's size box.
kWindowCollapseBoxRgn
The area occupied by a window's collapse box.
kWindowStructureRgn
The entire area occupied by a window, including the frame and content region; the window may be partially off-screen but its structure region does not change.
kWindowContentRgn
The window's content region--the part of a window in which your application displays the contents of the window or dialog, including the size box and any controls.

Figure 1-2 Window regions

© 1998 Apple Computer, Inc. - (Last Updated 19 Nov 98)