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Program: Visualization Toolkit
Module: vtkAffineRepresentation.h
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or for details.
This software is distributed WITHOUT ANY WARRANTY; without even
PURPOSE. See the above copyright notice for more information.
// .NAME vtkAffineRepresentation - abstract class for representing affine transformation widgets
// .SECTION Description
// This class defines an API for affine transformation widget
// representations. These representations interact with vtkAffineWidget. The
// basic functionality of the affine representation is to maintain a
// transformation matrix.
// This class may be subclassed so that alternative representations can
// be created. The class defines an API and a default implementation that
// the vtkAffineWidget interacts with to render itself in the scene.
// .SECTION Caveats
// The separation of the widget event handling and representation enables
// users and developers to create new appearances for the widget. It also
// facilitates parallel processing, where the client application handles
// events, and remote representations of the widget are slaves to the
// client (and do not handle events).
// .SECTION See Also
// vtkAffineWidget vtkWidgetRepresentation vtkAbstractWidget
#ifndef __vtkAffineRepresentation_h
#define __vtkAffineRepresentation_h
#include "vtkWidgetRepresentation.h"
class vtkTransform;
class VTK_WIDGETS_EXPORT vtkAffineRepresentation : public vtkWidgetRepresentation
// Description:
// Standard methods for instances of this class.
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Retrieve a linear transform characterizing the affine transformation
// generated by this widget. This method copies its internal transform into
// the transform provided. The transform is relative to the initial placement
// of the representation (i.e., when PlaceWidget() is invoked).
virtual void GetTransform(vtkTransform *t) = 0;
// Description:
// The tolerance representing the distance to the widget (in pixels)
// in which the cursor is considered near enough to the widget to
// be active.
// Enums define the state of the representation relative to the mouse pointer
// position. Used by ComputeInteractionState() to communicate with the
// widget.
enum _InteractionState
Outside=0, Rotate, Translate, TranslateX, TranslateY, ScaleWEdge, ScaleEEdge,
ScaleNEdge, ScaleSEdge, ScaleNE, ScaleSW, ScaleNW, ScaleSE,
ShearEEdge, ShearWEdge, ShearNEdge, ShearSEdge,
MoveOriginX, MoveOriginY, MoveOrigin
// Description:
// Methods to make this class properly act like a vtkWidgetRepresentation.
virtual void ShallowCopy(vtkProp *prop);
// The tolerance for selecting different parts of the widget.
int Tolerance;
// The internal transformation matrix
vtkTransform *Transform;
vtkAffineRepresentation(const vtkAffineRepresentation&); //Not implemented
void operator=(const vtkAffineRepresentation&); //Not implemented