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

  Program:   Visualization Toolkit
  Module:    vtkOrientedGlyphContourRepresentation.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   vtkOrientedGlyphContourRepresentation
 * @brief   Default representation for the contour widget
 *
 * This class provides the default concrete representation for the
 * vtkContourWidget. It works in conjunction with the
 * vtkContourLineInterpolator and vtkPointPlacer. See vtkContourWidget
 * for details.
 * @sa
 * vtkContourRepresentation vtkContourWidget vtkPointPlacer
 * vtkContourLineInterpolator
*/

#ifndef vtkOrientedGlyphContourRepresentation_h
#define vtkOrientedGlyphContourRepresentation_h

#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkContourRepresentation.h"

class vtkProperty;
class vtkActor;
class vtkPolyDataMapper;
class vtkPolyData;
class vtkGlyph3D;
class vtkPoints;

class VTKINTERACTIONWIDGETS_EXPORT vtkOrientedGlyphContourRepresentation : public vtkContourRepresentation
{
public:
  /**
   * Instantiate this class.
   */
  static vtkOrientedGlyphContourRepresentation *New();

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

  //@{
  /**
   * Specify the cursor shape. Keep in mind that the shape will be
   * aligned with the constraining plane by orienting it such that
   * the x axis of the geometry lies along the normal of the plane.
   */
  void SetCursorShape(vtkPolyData *cursorShape);
  vtkPolyData *GetCursorShape();
  //@}

  //@{
  /**
   * Specify the shape of the cursor (handle) when it is active.
   * This is the geometry that will be used when the mouse is
   * close to the handle or if the user is manipulating the handle.
   */
  void SetActiveCursorShape(vtkPolyData *activeShape);
  vtkPolyData *GetActiveCursorShape();
  //@}

  //@{
  /**
   * This is the property used when the handle is not active
   * (the mouse is not near the handle)
   */
  vtkGetObjectMacro(Property,vtkProperty);
  //@}

  //@{
  /**
   * This is the property used when the user is interacting
   * with the handle.
   */
  vtkGetObjectMacro(ActiveProperty,vtkProperty);
  //@}

  //@{
  /**
   * This is the property used by the lines.
   */
  vtkGetObjectMacro(LinesProperty,vtkProperty);
  //@}

  //@{
  /**
   * Subclasses of vtkOrientedGlyphContourRepresentation must implement these methods. These
   * are the methods that the widget and its representation use to
   * communicate with each other.
   */
  void SetRenderer(vtkRenderer *ren) override;
  void BuildRepresentation() override;
  void StartWidgetInteraction(double eventPos[2]) override;
  void WidgetInteraction(double eventPos[2]) override;
  int ComputeInteractionState(int X, int Y, int modified=0) override;
  //@}

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

  /**
   * Get the points in this contour as a vtkPolyData.
   */
  vtkPolyData * GetContourRepresentationAsPolyData() override;

  //@{
  /**
   * Controls whether the contour widget should always appear on top
   * of other actors in the scene. (In effect, this will disable OpenGL
   * Depth buffer tests while rendering the contour).
   * Default is to set it to false.
   */
  vtkSetMacro( AlwaysOnTop, int );
  vtkGetMacro( AlwaysOnTop, int );
  vtkBooleanMacro( AlwaysOnTop, int );
  //@}

  /**
   * Convenience method to set the line color.
   * Ideally one should use GetLinesProperty()->SetColor().
   */
  void SetLineColor(double r, double g, double b);

  /**
   * A flag to indicate whether to show the Selected nodes
   * Default is to set it to false.
   */
  void SetShowSelectedNodes(int) override;

  /**
   * Return the bounds of the representation
   */
  double *GetBounds() override;

protected:
  vtkOrientedGlyphContourRepresentation();
  ~vtkOrientedGlyphContourRepresentation() override;

  // Render the cursor
  vtkActor             *Actor;
  vtkPolyDataMapper    *Mapper;
  vtkGlyph3D           *Glypher;
  vtkActor             *ActiveActor;
  vtkPolyDataMapper    *ActiveMapper;
  vtkGlyph3D           *ActiveGlypher;
  vtkPolyData          *CursorShape;
  vtkPolyData          *ActiveCursorShape;
  vtkPolyData          *FocalData;
  vtkPoints            *FocalPoint;
  vtkPolyData          *ActiveFocalData;
  vtkPoints            *ActiveFocalPoint;

  vtkPolyData          *SelectedNodesData;
  vtkPoints            *SelectedNodesPoints;
  vtkActor             *SelectedNodesActor;
  vtkPolyDataMapper    *SelectedNodesMapper;
  vtkGlyph3D           *SelectedNodesGlypher;
  vtkPolyData          *SelectedNodesCursorShape;
  void CreateSelectedNodesRepresentation();

  vtkPolyData          *Lines;
  vtkPolyDataMapper    *LinesMapper;
  vtkActor             *LinesActor;

  // Support picking
  double LastPickPosition[3];
  double LastEventPosition[2];

  // Methods to manipulate the cursor
  void Translate(double eventPos[2]);
  void Scale(double eventPos[2]);
  void ShiftContour(double eventPos[2]);
  void ScaleContour(double eventPos[2]);

  void ComputeCentroid(double* ioCentroid);

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


  // Distance between where the mouse event happens and where the
  // widget is focused - maintain this distance during interaction.
  double InteractionOffset[2];

  int AlwaysOnTop;

  void BuildLines() override;

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

#endif