SplineComp(3U) InterViews Reference Manual SplineComp(3U)
NAME
SplineComp, SplineView, PSSpline, ClosedSplineComp, ClosedSplineView, PSClosedSpline - open and closed spline component subjects, views,
and PostScript external representations
SYNOPSIS
#include <Unidraw/Components/spline.h>
DESCRIPTION
SplineComp and ClosedSplineComp are VerticesComps that define open and closed splines, respectively. SplineComp uses an SFH_OpenBSpline
graphic to store its graphical attributes, while ClosedSplineComp uses an SFH_ClosedBSpline. SplineView and ClosedSplineView are Ver-
ticesViews for displaying open and closed splines. PSSpline and PSClosedSpline are PSVertices that externalize their subject's information
in PostScript form.
SPLINECOMP PUBLIC OPERATIONS
SplineComp(SFH_OpenBSpline* = nil)
The constructor takes an optional control point hit-detecting stroked-filled open B-spline graphic that defines the attributes of
the spline.
SFH_OpenBSpline* GetSpline()
Return the SFH_OpenBSpline graphic that defines the spline's attributes. GetSpline is simply a more specific form of the GetGraphic
operation.
SPLINEVIEW PUBLIC OPERATIONS
SplineView(SplineComp* = nil)
Create a SplineView, optionally supplying the subject.
virtual Manipulator* CreateManipulator(
Viewer*, Event&, Transformer*, Tool*
)
virtual void InterpretManipulator(Manipulator*)
SplineView 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. SplineView also defines a response to the ReshapeTool, allowing the user to click on one of its control points to reposition
it. The subject is actually replaced (via ReplaceCmd) with a new SplineComp subject reflecting the repositioned control point.
Repositioning will be influenced by gravity.
SplineComp* GetSplineComp()
Return the subject.
PSSPLINE PUBLIC OPERATIONS
PSSpline(SplineComp* = nil)
Construct a PostScript external representation of the given subject, if any.
PSSPLINE PROTECTED OPERATIONS
virtual const char* Name()
PSSpline identifies itself as "BSpl" in the PostScript output.
CLOSEDSPLINECOMP PUBLIC OPERATIONS
ClosedSplineComp(SFH_ClosedBSpline* = nil)
The constructor takes an optional control point hit-detecting stroked-filled closed B-spline graphic that defines the attributes of
the closed spline.
SFH_ClosedBSpline* GetClosedSpline()
Return the SFH_ClosedBSpline graphic that defines the closed spline's attributes. GetClosedSpline is simply a more specific form of
the GetGraphic operation.
CLOSEDSPLINEVIEW PUBLIC OPERATIONS
ClosedSplineView(ClosedSplineComp* = nil)
Create a ClosedSplineView, optionally supplying the subject.
virtual Manipulator* CreateManipulator(
Viewer*, Event&, Transformer*, Tool*
)
virtual void InterpretManipulator(Manipulator*)
ClosedSplineView 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. ClosedSplineView also defines a response to the ReshapeTool, allowing the user to click on one of its control points to re-
position it. The subject is actually replaced (via ReplaceCmd) with a new ClosedSplineComp subject reflecting the repositioned con-
trol point. Repositioning will be influenced by gravity.
ClosedSplineComp* GetClosedSplineComp()
Return the subject.
PSCLOSEDSPLINE PUBLIC OPERATIONS
PSClosedSpline(ClosedSplineComp* = nil)
Construct a PostScript external representation of the given subject, if any.
PSCLOSEDSPLINE PROTECTED OPERATIONS
virtual const char* Name()
PSClosedSpline identifies itself as "CBSpl" in the PostScript output.
SEE ALSO
Event(3I), GraphicComp(3U), GraphicCompTool(3U), GraphicView(3U), Grid(3U), PatternCmd(3U), PostScriptView(3U), ReshapeTool(3U), Rub-
band(3I), Transformer(3I), VerticesComp(3U), Viewer(3U), align(3U), edit(3U), splines(3U)
Unidraw 23 January 1991 SplineComp(3U)