vtkCameraOrientationWidget.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkCameraOrientationWidget.h
 
  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
 
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.
 
=========================================================================*/
#ifndef vtkCameraOrientationWidget_h
#define vtkCameraOrientationWidget_h
 
#include "vtkAbstractWidget.h"
#include "vtkInteractionWidgetsModule.h" // needed for export macro
#include "vtkWeakPointer.h"              // for weak pointer ivar
 
class vtkCameraInterpolator;
class vtkCameraOrientationRepresentation;
class vtkRenderer;
 
class VTKINTERACTIONWIDGETS_EXPORT vtkCameraOrientationWidget : public vtkAbstractWidget
{
public:
  static vtkCameraOrientationWidget* New();
  vtkTypeMacro(vtkCameraOrientationWidget, vtkAbstractWidget);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  vtkSetMacro(Animate, bool);
  vtkGetMacro(Animate, bool);
  vtkBooleanMacro(Animate, bool);
 
 
  vtkSetClampMacro(AnimatorTotalFrames, int, 2, VTK_INT_MAX);
  vtkGetMacro(AnimatorTotalFrames, int);
 
  void CreateDefaultRepresentation() override;
 
  void SquareResize();
 
 
  void SetParentRenderer(vtkRenderer* renderer);
  vtkRenderer* GetParentRenderer();
 
protected:
  vtkCameraOrientationWidget();
  ~vtkCameraOrientationWidget() override = default;
 
  // These methods handle events
  void ComputeWidgetState(int X, int Y, int modify = 0);
  static void SelectAction(vtkAbstractWidget*);
  static void EndSelectAction(vtkAbstractWidget*);
  static void MoveAction(vtkAbstractWidget*);
 
  // These control the representation and parent renderer's camera.
  void OrientParentCamera(double back[3], double up[3]);
  void OrientWidgetRepresentation();
  void InterpolateCamera(int t);
 
  // Manage the state of the widget
  enum class WidgetStateType : int
  {
    Inactive, // mouse is not over the widget, none of the handles are selected.
    Hot,      // mouse is over the widget but none of the handles are selected
    Active    // any one handle is selected, representation could be rotating.
  };
  WidgetStateType WidgetState = WidgetStateType::Inactive;
 
  vtkWeakPointer<vtkRenderer> ParentRenderer;
 
  // Store camera interpolations.
  vtkNew<vtkCameraInterpolator> CameraInterpolator;
 
  bool Animate = true;
  int AnimatorTotalFrames = 20;
 
  int ResizeObserverTag = -1;
 
private:
  vtkCameraOrientationWidget(const vtkCameraOrientationWidget&) = delete;
  void operator=(const vtkCameraOrientationWidget&) = delete;
};
 
#endif