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 characters
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)