PadComp(3U)						    InterViews Reference Manual 					       PadComp(3U)

NAME

       PadComp, PadView, PadGraphic, PSPad - pad connector subject, view, structured graphic, and PostScript external representation

SYNOPSIS

       #include <Unidraw/Components/pad.h>

DESCRIPTION

       PadComp	is  a  Connector  subclass  that  supports  connectivity with two degrees of freedom.  It uses a PadGraphic to store its graphical
       attributes.  PadView is a GraphicView for displaying the pad.  PSPad is a PostScriptView that externalizes  the	subject's  information	in
       PostScript form.

PADCOMP PUBLIC OPERATIONS

       PadComp(PadGraphic* = nil)
	      The constructor takes an optional PadGraphic that defines the pad's graphical attributes.

       virtual void Interpret(Command*)
       virtual void Uninterpret(Command*)
	      PadComp  (un)interprets  a subset of commands that connectors can generally interpret, namely MoveCmd, BrushCmd, AlignCmd, Mobility-
	      Cmd, DeleteCmd, and CutCmd.

       virtual Mobility GetMobility()
       virtual void SetMobility(Mobility)
	      PadComp redefines these functions to return and assign its _mobility protected member.  The pad has fixed mobility initially.

       Pad* GetPad()
	      Return the Pad graphic that defines the line's attributes.  GetPad is simply a more specific form of the GetGraphic operation.

PADVIEW PUBLIC OPERATIONS

       PadView(PadComp* = nil)
	      Create an PadView, optionally supplying the subject.

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

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

       virtual void InterpretManipulator(Manipulator*)
	      PadViews respond only to manipulation by GraphicCompTools, MoveTools, and ConnectTools. PadView inherits its MoveTool response  from
	      ConnectorView.   GraphicCompTool	will let the user sweep out a rectangle that reflects the pad's size.  Creation will be influenced
	      by gravity, if any. PadView creates a ConnectManip in response to the ConnectTool, which will exhibit a  gravational  attraction	to
	      potential  target  connectors.  PadView will produce a ConnectCmd to connect the pad to its target. A pad connected in this way will
	      receive floating mobility.

       PadComp* GetPadComp()
	      Return the subject.

PADVIEW PROTECTED OPERATIONS

       PadGraphic* GetPad()
	      Return the PadGraphic that defines the pad's attributes.	GetPad is simply a more specific form of the GetGraphic operation.

       virtual PadComp* NewSubject(PadGraphic*)
	      A helper function that creates a PadComp subject with the given pad graphic. This function produces  the	proper	subject  when  the
	      GraphicCompTool's manipulator is interpreted.  Subclasses can redefine this operation to return a PadComp subclass, thus eliminating
	      the need to reimplement InterpretManipulator.

       Manipulator* CreateGraphicCompManip(
	   Viewer*, Event&, Transformer*, Tool*
       )

       Manipulator* CreateConnectManip(
	   Viewer*, Event&, Transformer*, Tool*
       )

       Command* InterpretGraphicCompManip(Manipulator*)
       Command* InterpretConnectManip(Manipulator*)
	      Helper functions used by CreateManipulator and InterpretManipulator to create and interpret the manipulators associated with  Graph-
	      icCompTool and ConnectTool.

PADGRAPHIC PUBLIC OPERATIONS

       PadGraphic(
	   Coord = 0, Coord = 0, Coord = 0, Coord = 0,
	   Graphic* = nil
       )
	      Create  a PadGraphic, optionally specifying lower-left and upper-right corners and a graphic from which to obtain its default graph-
	      ics attributes.

       void GetOriginal(Coord&, Coord&, Coord&, Coord&)
	      Return the PadGraphic's original coordinates as specified in the constructor.

PSPAD PUBLIC OPERATIONS

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

SEE ALSO

       BrushCmd(3U), ConnectTool(3U), Connector(3U), ConnectorView3U), Event(3I), Graphic(3U), GraphicCompTool(3U), Grid(3U),  MoveTool(3U),  Pat-
       ternCmd(3U), PostScriptView(3U), Transformer(3I), Viewer(3U), align(3U), edit(3U), manips(3U), transforms(3U)

Unidraw 							  23 January 1991						       PadComp(3U)