PATHMac OS 8 and 9 Developer Documentation > Human Interface Toolbox > Appearance Manager >

Programming With the Appearance Manager

ThemeTrackDrawInfo

Your application fills out the applicable fields of a ThemeTrackDrawInfo structure to fully describe any given track control. The ThemeTrackDrawInfo structure is available with Appearance Manager 1.1 and later.

struct ThemeTrackDrawInfo {
    ThemeTrackKind          kind;
    Rect                    bounds;
    SInt32                  min;
    SInt32                  max;
    SInt32                  value;
    UInt32                  reserved;

    ThemeTrackAttributes    attributes;
    ThemeTrackEnableState   enableState;
    UInt8                   filler1; // padding

    union {
        ScrollBarTrackInfo  scrollbar;
        SliderTrackInfo     slider;
        ProgressTrackInfo   progress;
    } trackInfo;
};
typedef struct ThemeTrackDrawInfo ThemeTrackDrawInfo;

Field descriptions

kind
A value of type ThemeTrackKind , specifying the type of track to be drawn. See Theme Track Kind Constants for descriptions of possible values.
bounds
A structure of type Rect specifying the dimensions and position of the track, in local coordinates.
min
A signed 32-bit integer specifying the minimum value for the track.
max
A signed 32-bit integer specifying the maximum value for the track.
value
A signed 32-bit integer specifying the current value for the track.
reserved
Reserved.
attributes
A value of type ThemeTrackAttributes specifying additional attributes of the track, such as whether the track has an indicator. See Theme Track Attributes Constants for descriptions of possible values.
enableState
A value of type ThemeTrackEnableState specifying the current state of the track control; see Theme Track Enable State Constants for descriptions of possible values.
trackInfo
A union of the ScrollBarTrackInfo , SliderTrackInfo , and ProgressTrackInfo structures. Your application fills in the structure that is appropriate for the kind of track with which you are working. See ScrollBarTrackInfo , SliderTrackInfo , and ProgressTrackInfo for details on these structures.
© 1999 Apple Computer, Inc. – (Last Updated 29 April 99)