debian man page for verticescomp

VerticesComp(3U)					    InterViews Reference Manual 					  VerticesComp(3U)

NAME
       VerticesComp,  VerticesView,  PSVertices  -  abstract base classes for vertexed graphical component subjects and their views and PostScript
       external representations

SYNOPSIS
       #include <Unidraw/Components/vertices.h>

DESCRIPTION
       VerticesComp is an abstract base class for graphical components whose geometry can be expressed	as  a  list  of  coordinate  pairs.   Ver-
       ticesComp  uses	a  Vertices  graphic to store its graphical attributes.  VerticesView is an abstract GraphicView subclass for displaying a
       VerticesComp. PSVertices is an abstract PostScriptView for subclasses that externalize VerticesComp information in PostScript form.

VERTICESCOMP PUBLIC OPERATIONS
       Vertices* GetVertices()
	      Return the Vertices graphic that defines the vertices's attributes.  GetVertices is simply a more specific form  of  the	GetGraphic
	      operation.

VERTICESCOMP PROTECTED OPERATIONS
       VerticesComp(Vertices* = nil)
	      The constructor takes an optional vertices graphic that defines the component's graphical attributes.

VERTICESVIEW PUBLIC OPERATIONS
       virtual void Interpret(Command*)
	      VerticesView interprets AlignToGridCmd to align its first vertex to the grid.

       virtual void GetVertices(Coord*& x, Coord*& y, int& count)
	      Return the view's vertices in canvas coordinates.  GetVertices allocates new arrays each time it is called.

       VerticesComp* GetVerticesComp()
	      Return the subject.

VERTICESVIEW PROTECTED OPERATIONS
       VerticesView(VerticesComp* = nil)
	      Initialize a VerticesView, optionally supplying the subject.

       virtual void CreateHandles()
	      VerticesView redefines CreateHandles to create a RubberHandles object that draws a handle coinciding with each vertex.

       virtual boolean VertexChanged()
	      Returns  whether	or  not  the vertices as stored in the view are different in any way from those stored in the subject.	The Update
	      function relies on the result to determine whether to  recreate  the  view's  structured	graphic  based	on  the  subject's.   Ver-
	      ticesView::VertexChanged (conservatively) returns false by default; subclasses should redefine this function to make a more discern-
	      ing decision, thereby increasing the efficiency of the update operation.

PSVERTICES PROTECTED OPERATIONS
       PSVertices(VerticesComp* = nil)
	      Initialize a PostScript external representation of the given subject, if any.

       virtual const char* Name()
	      Subclasses should redefine Name to return the proper tag for the object in the PostScript output as required for	idraw  compatibil-
	      ity.

SEE ALSO
       GraphicComp(3U), GraphicView(3U), Grid(3U), PatternCmd(3U), PostScriptView(3U), Vertices(3U), align(3U), idraw(3I)

Unidraw 							  23 January 1991						  VerticesComp(3U)