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124 lines
3.6 KiB
C++
124 lines
3.6 KiB
C++
/*=========================================================================
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Program: Visualization Toolkit
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Module: vtkAffineRepresentation.h
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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/**
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* @class vtkAffineRepresentation
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* @brief abstract class for representing affine transformation widgets
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*
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* This class defines an API for affine transformation widget
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* representations. These representations interact with vtkAffineWidget. The
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* basic functionality of the affine representation is to maintain a
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* transformation matrix.
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*
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* This class may be subclassed so that alternative representations can
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* be created. The class defines an API and a default implementation that
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* the vtkAffineWidget interacts with to render itself in the scene.
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*
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* @warning
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* The separation of the widget event handling and representation enables
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* users and developers to create new appearances for the widget. It also
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* facilitates parallel processing, where the client application handles
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* events, and remote representations of the widget are slaves to the
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* client (and do not handle events).
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*
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* @sa
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* vtkAffineWidget vtkWidgetRepresentation vtkAbstractWidget
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*/
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#ifndef vtkAffineRepresentation_h
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#define vtkAffineRepresentation_h
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#include "vtkInteractionWidgetsModule.h" // For export macro
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#include "vtkWidgetRepresentation.h"
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class vtkTransform;
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class VTKINTERACTIONWIDGETS_EXPORT vtkAffineRepresentation : public vtkWidgetRepresentation
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{
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public:
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//@{
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/**
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* Standard methods for instances of this class.
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*/
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vtkTypeMacro(vtkAffineRepresentation, vtkWidgetRepresentation);
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void PrintSelf(ostream& os, vtkIndent indent) override;
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//@}
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/**
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* Retrieve a linear transform characterizing the affine transformation
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* generated by this widget. This method copies its internal transform into
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* the transform provided. The transform is relative to the initial placement
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* of the representation (i.e., when PlaceWidget() is invoked).
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*/
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virtual void GetTransform(vtkTransform* t) = 0;
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//@{
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/**
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* The tolerance representing the distance to the widget (in pixels)
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* in which the cursor is considered near enough to the widget to
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* be active.
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*/
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vtkSetClampMacro(Tolerance, int, 1, 100);
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vtkGetMacro(Tolerance, int);
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//@}
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// Enums define the state of the representation relative to the mouse pointer
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// position. Used by ComputeInteractionState() to communicate with the
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// widget.
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enum _InteractionState
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{
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Outside = 0,
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Rotate,
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Translate,
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TranslateX,
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TranslateY,
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ScaleWEdge,
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ScaleEEdge,
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ScaleNEdge,
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ScaleSEdge,
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ScaleNE,
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ScaleSW,
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ScaleNW,
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ScaleSE,
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ShearEEdge,
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ShearWEdge,
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ShearNEdge,
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ShearSEdge,
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MoveOriginX,
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MoveOriginY,
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MoveOrigin
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};
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/**
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* Methods to make this class properly act like a vtkWidgetRepresentation.
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*/
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void ShallowCopy(vtkProp* prop) override;
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protected:
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vtkAffineRepresentation();
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~vtkAffineRepresentation() override;
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// The tolerance for selecting different parts of the widget.
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int Tolerance;
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// The internal transformation matrix
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vtkTransform* Transform;
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private:
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vtkAffineRepresentation(const vtkAffineRepresentation&) = delete;
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void operator=(const vtkAffineRepresentation&) = delete;
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};
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#endif
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