RectComp,  RectView, PSRect - rectangle component subject,
       view, and PostScript external representation

SYNOPSIS

       #include <Unidraw/Components/rect.h>

DESCRIPTION

       RectComp is a GraphicComp that defines  a  rectangle.   It
       uses an SF_Rect graphic to store its graphical attributes.
       RectView is a GraphicView for  displaying  the  rectangle.
       PSRect is a PostScriptView that externalizes the subject's
       information in PostScript form.

RECTCOMP PUBLIC OPERATIONS

       RectComp(SF_Rect* = nil)
              The constructor takes  an  optional  stroked-filled
              rectangle  that defines the attributes of the rect-
              angle.

       SF_Rect* GetRect()
              Return the SF_Rect graphic that defines the rectan-
              gle's  attributes.   GetRect  is simply a more spe-
              cific form of the GetGraphic operation.

RECTVIEW PUBLIC OPERATIONS

       RectView(RectComp* = nil)
              Create an RectView, optionally supplying  the  sub-
              ject.

       virtual void Interpret(Command*)
              RectView  interprets  AlignToGridCmd  to  align its
              lower-left to the grid.

       virtual Manipulator* CreateManipulator(
          Viewer*, Event&, Transformer*, Tool*
       )

       virtual void InterpretManipulator(Manipulator*)
              RectView redefines  its  response  to  manipulation
              with  a  GraphicCompTool.  GraphicCompTool will let
              the user sweep out a rectangle  that  reflects  the
              RectComp's  size.   Creation  will be influenced by
              gravity, if any. RectView also defines  a  response
              to  the  ReshapeTool, allowing the user to click on
              one of its corners to reposition it.   The  subject
              is  actually replaced (via ReplaceCmd) with a Poly-
              gonComp subject reflecting the repositioned corner.
              Repositioning will be influenced by gravity.

       virtual void GetCorners(Coord*, Coord*)
              GetCorners  takes  two  arrays of four Coord values
              and stores into them the coordinates  of  its  cor-
              Return the subject.

RECTVIEW PROTECTED OPERATIONS

       virtual void CreateHandles()
              RectView  redefines  CreateHandles to use a Rubber-
              Handles object with four handles, one at each  cor-
              ner of the rectangle.

PSRECT PUBLIC OPERATIONS

       PSRect(RectComp* = nil)
              Construct  a  PostScript external representation of
              the given subject, if any.

SEE ALSO

       GraphicComp(3U),   GraphicCompTool(3U),   GraphicView(3U),
       Grid(3U),       PolygonComp(3U),       PostScriptView(3U),
       ReshapeTool(3U), align(3U), edit(3U), polygons(3U)