/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkPointHandleRepresentation3D.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.

=========================================================================*/
/**
 * @class   vtkPointHandleRepresentation3D
 * @brief   represent the position of a point in 3D space
 *
 * This class is used to represent a vtkHandleWidget. It represents a position
 * in 3D world coordinates using a x-y-z cursor. The cursor can be configured to
 * show a bounding box and/or shadows.
 *
 * @sa
 * vtkHandleRepresentation vtkHandleWidget vtkCursor3D
 */

#ifndef vtkPointHandleRepresentation3D_h
#define vtkPointHandleRepresentation3D_h

#include "vtkCursor3D.h" // Needed for delegation to cursor3D
#include "vtkHandleRepresentation.h"
#include "vtkInteractionWidgetsModule.h" // For export macro

class vtkCursor3D;
class vtkProperty;
class vtkActor;
class vtkPolyDataMapper;
class vtkCellPicker;

class VTKINTERACTIONWIDGETS_EXPORT vtkPointHandleRepresentation3D : public vtkHandleRepresentation
{
public:
  /**
   * Instantiate this class.
   */
  static vtkPointHandleRepresentation3D* New();

  ///@{
  /**
   * Standard methods for instances of this class.
   */
  vtkTypeMacro(vtkPointHandleRepresentation3D, vtkHandleRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent) override;
  ///@}

  using vtkHandleRepresentation::Translate;

  ///@{
  /**
   * Set the position of the point in world and display coordinates. Note
   * that if the position is set outside of the bounding box, it will be
   * clamped to the boundary of the bounding box. This method overloads
   * the superclasses' SetWorldPosition() and SetDisplayPosition() in
   * order to set the focal point of the cursor properly.
   */
  void SetWorldPosition(double p[3]) override;
  void SetDisplayPosition(double p[3]) override;
  ///@}

  /**
   * Turn on/off the wireframe bounding box.
   */
  void SetOutline(int o) { this->Cursor3D->SetOutline(o); }
  int GetOutline() { return this->Cursor3D->GetOutline(); }
  void OutlineOn() { this->Cursor3D->OutlineOn(); }
  void OutlineOff() { this->Cursor3D->OutlineOff(); }

  /**
   * Turn on/off the wireframe x-shadows.
   */
  void SetXShadows(int o) { this->Cursor3D->SetXShadows(o); }
  int GetXShadows() { return this->Cursor3D->GetXShadows(); }
  void XShadowsOn() { this->Cursor3D->XShadowsOn(); }
  void XShadowsOff() { this->Cursor3D->XShadowsOff(); }

  /**
   * Turn on/off the wireframe y-shadows.
   */
  void SetYShadows(int o) { this->Cursor3D->SetYShadows(o); }
  int GetYShadows() { return this->Cursor3D->GetYShadows(); }
  void YShadowsOn() { this->Cursor3D->YShadowsOn(); }
  void YShadowsOff() { this->Cursor3D->YShadowsOff(); }

  /**
   * Turn on/off the wireframe z-shadows.
   */
  void SetZShadows(int o) { this->Cursor3D->SetZShadows(o); }
  int GetZShadows() { return this->Cursor3D->GetZShadows(); }
  void ZShadowsOn() { this->Cursor3D->ZShadowsOn(); }
  void ZShadowsOff() { this->Cursor3D->ZShadowsOff(); }

  ///@{
  /**
   * If translation mode is on, as the widget is moved the bounding box,
   * shadows, and cursor are all translated and sized simultaneously as the
   * point moves (i.e., the left and middle mouse buttons act the same). If
   * translation mode is off, the cursor does not scale itself (based on the
   * specified handle size), and the bounding box and shadows do not move or
   * size themselves as the cursor focal point moves, which is constrained by
   * the bounds of the point representation. (Note that the bounds can be
   * scaled up using the right mouse button, and the bounds can be manually
   * set with the SetBounds() method.)
   */
  void SetTranslationMode(vtkTypeBool mode);
  vtkGetMacro(TranslationMode, vtkTypeBool);
  vtkBooleanMacro(TranslationMode, vtkTypeBool);
  ///@}

  ///@{
  /**
   * Convenience methods to turn outline and shadows on and off.
   */
  void AllOn()
  {
    this->OutlineOn();
    this->XShadowsOn();
    this->YShadowsOn();
    this->ZShadowsOn();
  }
  void AllOff()
  {
    this->OutlineOff();
    this->XShadowsOff();
    this->YShadowsOff();
    this->ZShadowsOff();
  }
  ///@}

  ///@{
  /**
   * Set/Get the handle properties when unselected and selected.
   */
  void SetProperty(vtkProperty*);
  void SetSelectedProperty(vtkProperty*);
  vtkGetObjectMacro(Property, vtkProperty);
  vtkGetObjectMacro(SelectedProperty, vtkProperty);
  ///@}

  ///@{
  /**
   * Set the "hot spot" size; i.e., the region around the focus, in which the
   * motion vector is used to control the constrained sliding action. Note the
   * size is specified as a fraction of the length of the diagonal of the
   * point widget's bounding box.
   */
  vtkSetClampMacro(HotSpotSize, double, 0.0, 1.0);
  vtkGetMacro(HotSpotSize, double);
  ///@}

  /**
   * Overload the superclasses SetHandleSize() method to update internal variables.
   */
  void SetHandleSize(double size) override;

  ///@{
  /**
   * Methods to make this class properly act like a vtkWidgetRepresentation.
   */
  double* GetBounds() VTK_SIZEHINT(6) override;
  void BuildRepresentation() override;
  void StartWidgetInteraction(double eventPos[2]) override;
  void WidgetInteraction(double eventPos[2]) override;
  int ComputeInteractionState(int X, int Y, int modify = 0) override;
  void PlaceWidget(double bounds[6]) override;
  void StartComplexInteraction(vtkRenderWindowInteractor* iren, vtkAbstractWidget* widget,
    unsigned long event, void* calldata) override;
  void ComplexInteraction(vtkRenderWindowInteractor* iren, vtkAbstractWidget* widget,
    unsigned long event, void* calldata) override;
  int ComputeComplexInteractionState(vtkRenderWindowInteractor* iren, vtkAbstractWidget* widget,
    unsigned long event, void* calldata, int modify = 0) override;
  ///@}

  ///@{
  /**
   * Methods to make this class behave as a vtkProp.
   */
  void ShallowCopy(vtkProp* prop) override;
  void DeepCopy(vtkProp* prop) override;
  void GetActors(vtkPropCollection*) override;
  void ReleaseGraphicsResources(vtkWindow*) override;
  int RenderOpaqueGeometry(vtkViewport* viewport) override;
  int RenderTranslucentPolygonalGeometry(vtkViewport* viewport) override;
  vtkTypeBool HasTranslucentPolygonalGeometry() override;
  ///@}

  void Highlight(int highlight) override;

  ///@{
  /**
   * Turn on/off smooth motion of the handle. See the documentation of
   * MoveFocusRequest for details. By default, SmoothMotion is ON. However,
   * in certain applications the user may want to turn it off. For instance
   * when using certain specific PointPlacer's with the representation such
   * as the vtkCellCentersPointPlacer, which causes the representation to
   * snap to the center of cells, or using a vtkPolygonalSurfacePointPlacer
   * which constrains the widget to the surface of a mesh. In such cases,
   * inherent restrictions on handle placement might conflict with a request
   * for smooth motion of the handles.
   */
  vtkSetMacro(SmoothMotion, vtkTypeBool);
  vtkGetMacro(SmoothMotion, vtkTypeBool);
  vtkBooleanMacro(SmoothMotion, vtkTypeBool);
  ///@}

  /*
   * Register internal Pickers within PickingManager
   */
  void RegisterPickers() override;

  /**
   * Override to ensure that the internal actor's visibility is consistent with
   * this representation's visibility. Inconsistency between the two would cause
   * issues in picking logic which relies on individual view prop visibility to
   * determine whether the prop is pickable.
   */
  void SetVisibility(vtkTypeBool visible) override;

protected:
  vtkPointHandleRepresentation3D();
  ~vtkPointHandleRepresentation3D() override;

  // the cursor3D
  vtkActor* Actor;
  vtkPolyDataMapper* Mapper;
  vtkCursor3D* Cursor3D;

  // Do the picking
  vtkCellPicker* CursorPicker;
  double LastPickPosition[3];
  double LastEventPosition[3];

  // Methods to manipulate the cursor
  int ConstraintAxis;
  void Translate(const double* p1, const double* p2) override;
  void Scale(const double* p1, const double* p2, const double eventPos[2]);
  void MoveFocus(const double* p1, const double* p2);
  void SizeBounds();

  /**
   * Given a motion vector defined by p1 --> p2 (p1 and p2 are in
   * world coordinates), the new display position of the handle center is
   * populated into requestedDisplayPos. This is again only a request for the
   * new display position. It is up to the point placer to deduce the
   * appropriate world co-ordinates that this display position will map into.
   * The placer may even disallow such a movement.
   * If "SmoothMotion" is OFF, the returned requestedDisplayPos is the same
   * as the event position, ie the location of the mouse cursor. If its OFF,
   * incremental offsets as described above are used to compute it.
   */
  void MoveFocusRequest(
    const double* p1, const double* p2, const double currPos[2], double center[3]);

  // Properties used to control the appearance of selected objects and
  // the manipulator in general.
  vtkProperty* Property;
  vtkProperty* SelectedProperty;
  void CreateDefaultProperties();

  // The size of the hot spot.
  double HotSpotSize;
  int DetermineConstraintAxis(int constraint, double* x, double* startPoint);
  int WaitingForMotion;
  int WaitCount;

  // Current handle sized (may reflect scaling)
  double CurrentHandleSize;

  // Control how translation works
  vtkTypeBool TranslationMode;

  vtkTypeBool SmoothMotion;

private:
  vtkPointHandleRepresentation3D(const vtkPointHandleRepresentation3D&) = delete;
  void operator=(const vtkPointHandleRepresentation3D&) = delete;
};

#endif
