NAME

       PolygonComp,  PolygonView,  PSPolygon  -  polygon  component subject, view, and PostScript
       external representation

SYNOPSIS

       #include <Unidraw/Components/polygon.h>

DESCRIPTION

       PolygonComp is a VerticesComp that defines a polygon.  It uses an  SF_Polygon  graphic  to
       store its graphical attributes.  PolygonView is a VerticesView for displaying the polygon.
       PSPolygon is a PSVertices that externalizes the subject's information in PostScript form.

POLYGONCOMP PUBLIC OPERATIONS

       PolygonComp(SF_Polygon* = nil)
              The constructor takes an optional stroked-filled polygon graphic that  defines  the
              attributes of the polygon.

       SF_Polygon* GetPolygon()
              Return  the  Polygon  graphic that defines the polygon's attributes.  GetPolygon is
              simply a more specific form of the GetGraphic operation.

POLYGONVIEW PUBLIC OPERATIONS

       PolygonView(PolygonComp* = nil)
              Create an PolygonView, optionally supplying the subject.

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

       virtual void InterpretManipulator(Manipulator*)
              PolygonView redefines its response to manipulation  with  a  GraphicCompTool.   The
              user clicks the left mouse button to specify each vertex and clicks with the middle
              mouse button to specify the final vertex.  Vertex positioning will  be  constrained
              by  gravity,  if  any.   PolygonView  also  defines  a response to the ReshapeTool,
              allowing the user to click on one of its vertices to reposition it.  The subject is
              actually  replaced  (via  ReplaceCmd) with a new PolygonComp subject reflecting the
              repositioned vertex.  Repositioning will be influenced by gravity.

       PolygonComp* GetPolygonComp()
              Return the subject.

PSPOLYGON PUBLIC OPERATIONS

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

PSPOLYGON PROTECTED OPERATIONS

       virtual const char* Name()
              PSPolygon identifies itself as "Poly" in the PostScript output.

SEE ALSO

       Event(3I),    GraphicComp(3U),     GraphicCompTool(3U),     GraphicView(3U),     Grid(3U),
       PatternCmd(3U),   PostScriptView(3U),   ReshapeTool(3U),   Rubband(3I),   Transformer(3I),
       VerticesComp(3U), Viewer(3U), align(3U), edit(3U), polygons(3U)