globals(3U)                                                 InterViews Reference Manual                                                globals(3U)

NAME

       globals - Unidraw global constants, types, instances, and functions.

SYNOPSIS

       #include <Unidraw/globals.h>

DESCRIPTION

       Several constants and types are used throughout the Unidraw library.  It also provides global access to one-of-a-kind instances such as the
       unidraw object as well as shared graphics resources.  Finally, there are several global functions for common data  manipulations.   All  of
       these are declared one file for inclusion into other files where they are needed.

CONSTANTS

       static const int CHARBUFSIZE
              Size of standard character buffer.

       static const int HANDLE_SIZE
              Size of selection handles, in pixels.

       static const char MARK[]
              String that delineates data boundaries in the ASCII representation that Catalog generates. Used for error checking.

       static const int PIN_RAD
              The radius of a pin, used in its default graphical representation, in pixels.

       static const int SLOP
              Tolerance within which a hit on a graphical object will be detected, in pixels.

TYPES

       enum DragConstraint
              Enumerates orthogonal ways in which cursor movement may be constrained, usually during direct manipulation.  Possible values include
              None, XFixed, YFixed, XYEqual, HorizOrVert, or Gravity.

       enum Mobility
              Enumerates the three possible component mobilities: Fixed, Floating, or Undef (undefined).

       typedef unsigned Orientation
              Specifies two kinds of orientation: Portrait or Vertical (synonymous), and Landscape or Horizontal (synonymous).

       enum TransMethod
              Enumerates the three possible transmission methods for connectors: In, Out, or InOut.

       typedef unsigned long ClassId
              Type for representing unique class names for catalog-managed objects.

INSTANCES

       extern Unidraw* unidraw
       extern CSolver* csolver
              The global unidraw and csolver objects.  These and all other global instances are initialized automatically.

       extern PSColor* psblack
       extern PSColor* pswhite
       extern PSPattern* pssolid
       extern PSPattern* psclear
       extern PSPattern* psnonepat
       extern PSBrush* pssingle
       extern PSBrush* psnonebr
       extern PSFont* psstdfont
              Predefined graphics resource objects.  The None operation on psnonepat and psnonebr returns true.

       extern Graphic* stdgraphic
              A FullGraphic instance with its graphics state set to the global values listed above, excluding psnonepat and psnonebr.

FUNCTIONS

       extern void NormalRect(Coord& l, Coord& b, Coord& r, Coord& t)
              Given two coordinate pairs (l, b) and (r, t), it checks whether l < r and b < t.  If not, it  swaps  the  values  in  the  offending
              inequalities.  This function is useful for ensuring that a rectangle is defined by its lower-left and upper-right vertices.

       extern void GetLine(
           const char* buf, int len, int beg, int& end,
           int& size, int& nextBeg
       )
              This function is convenient for extracting lines from a buffer with a minimum of additional math operations. Given a buffer of char-
              acters buf of length len, search for the first newline character (or the last character in the buffer) after the character at  index
              beg;  return  the newline's position in end, the size of the run of text terminated by a newline (end + 1 - beg), and the index with
              which to begin a search for the next newline character (nextBeg).

       extern void GetAlignmentPoint(
           Graphic*, Alignment, float&, float&
       )
              Return the point (in floating point canvas coordinates) on a graphic corresponding to the given alignment.  For example,  to  obtain
              the coordinates of the lower-left of a rectangle graphic, specify the graphic and a BottomLeft alignment.

       extern void Ref(Resource*)
              Call the Reference operation on the given instance of a resource subclass if the pointer is non-nil.

       extern char* strnew(const char*)
              Duplicate the given null-terminated string, creating a buffer of the appropriate size and returning the null-terminated result.

SEE ALSO

       CSolver(3U), Catalog(3U), Graphic(3U), GraphicView(3U), Pin(3U), Resource(3I), Unidraw(3U), InterViews(3I), pspaint(3U)

Unidraw                                                            30 July 1990                                                        globals(3U)