vtkLeaderActor2D.h

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

  Program:   Visualization Toolkit
  Module:    vtkLeaderActor2D.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 vtkLeaderActor2D_h
#define vtkLeaderActor2D_h

#include "vtkRenderingAnnotationModule.h" // For export macro
#include "vtkActor2D.h"

class vtkPoints;
class vtkCellArray;
class vtkPolyData;
class vtkPolyDataMapper2D;
class vtkTextMapper;
class vtkTextProperty;

class VTKRENDERINGANNOTATION_EXPORT vtkLeaderActor2D : public vtkActor2D
{
public:
  vtkTypeMacro(vtkLeaderActor2D,vtkActor2D);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static vtkLeaderActor2D *New();


  vtkSetMacro(Radius,double);
  vtkGetMacro(Radius,double);


  vtkSetStringMacro(Label);
  vtkGetStringMacro(Label);


  virtual void SetLabelTextProperty(vtkTextProperty *p);
  vtkGetObjectMacro(LabelTextProperty,vtkTextProperty);


  vtkSetClampMacro(LabelFactor, double, 0.1, 2.0);
  vtkGetMacro(LabelFactor, double);

  // Enums defined to support methods for control of arrow placement and
  // and appearance of arrow heads.
  enum {VTK_ARROW_NONE=0,VTK_ARROW_POINT1,VTK_ARROW_POINT2,VTK_ARROW_BOTH};
  enum {VTK_ARROW_FILLED=0,VTK_ARROW_OPEN,VTK_ARROW_HOLLOW};


  vtkSetClampMacro(ArrowPlacement,int,VTK_ARROW_NONE,VTK_ARROW_BOTH);
  vtkGetMacro(ArrowPlacement,int);
  void SetArrowPlacementToNone() {this->SetArrowPlacement(VTK_ARROW_NONE);}
  void SetArrowPlacementToPoint1() {this->SetArrowPlacement(VTK_ARROW_POINT1);}
  void SetArrowPlacementToPoint2() {this->SetArrowPlacement(VTK_ARROW_POINT2);}
  void SetArrowPlacementToBoth() {this->SetArrowPlacement(VTK_ARROW_BOTH);}


  vtkSetClampMacro(ArrowStyle,int,VTK_ARROW_FILLED,VTK_ARROW_HOLLOW);
  vtkGetMacro(ArrowStyle,int);
  void SetArrowStyleToFilled() {this->SetArrowStyle(VTK_ARROW_FILLED);}
  void SetArrowStyleToOpen() {this->SetArrowStyle(VTK_ARROW_OPEN);}
  void SetArrowStyleToHollow() {this->SetArrowStyle(VTK_ARROW_HOLLOW);}


  vtkSetClampMacro(ArrowLength,double,0.0,1.0);
  vtkGetMacro(ArrowLength,double);
  vtkSetClampMacro(ArrowWidth,double,0.0,1.0);
  vtkGetMacro(ArrowWidth,double);


  vtkSetClampMacro(MinimumArrowSize,double,1.0,VTK_FLOAT_MAX);
  vtkGetMacro(MinimumArrowSize,double);
  vtkSetClampMacro(MaximumArrowSize,double,1.0,VTK_FLOAT_MAX);
  vtkGetMacro(MaximumArrowSize,double);


  vtkSetMacro(AutoLabel,vtkTypeBool);
  vtkGetMacro(AutoLabel,vtkTypeBool);
  vtkBooleanMacro(AutoLabel,vtkTypeBool);


  vtkSetStringMacro(LabelFormat);
  vtkGetStringMacro(LabelFormat);


  vtkGetMacro(Length,double);
  vtkGetMacro(Angle,double);


  int RenderOverlay(vtkViewport* viewport) override;
  int RenderOpaqueGeometry(vtkViewport* viewport) override;
  int RenderTranslucentPolygonalGeometry(vtkViewport *) override {return 0;}

  vtkTypeBool HasTranslucentPolygonalGeometry() override;

  void ReleaseGraphicsResources(vtkWindow *) override;
  void ShallowCopy(vtkProp *prop) override;

protected:
  vtkLeaderActor2D();
  ~vtkLeaderActor2D() override;

  // Internal helper methods
  virtual void BuildLeader(vtkViewport *viewport);
  int SetFontSize(vtkViewport *viewport, vtkTextMapper *textMapper,
                  int *targetSize, double factor, int *stringSize);
  int ClipLeader(double xL[3], int stringSize[2], double p1[3], double ray[3],
                 double c1[3], double c2[3]);
  void BuildCurvedLeader(double p1[3], double p2[3], double ray[3], double rayLength,
                         double theta, vtkViewport *viewport, int viewportChanged);
  int InStringBox(double center[3], int stringSize[2], double x[3]);


  // Characteristics of the leader
  double Radius;
  double Length;
  double Angle;

  vtkTypeBool              AutoLabel;
  char            *LabelFormat;
  char            *Label;
  double           LabelFactor;
  vtkTextMapper   *LabelMapper;
  vtkActor2D      *LabelActor;
  vtkTextProperty *LabelTextProperty;

  int    ArrowPlacement;
  int    ArrowStyle;
  double ArrowLength;
  double ArrowWidth;
  double MinimumArrowSize;
  double MaximumArrowSize;

  vtkPoints           *LeaderPoints;
  vtkCellArray        *LeaderLines;
  vtkCellArray        *LeaderArrows;
  vtkPolyData         *Leader;
  vtkPolyDataMapper2D *LeaderMapper;
  vtkActor2D          *LeaderActor;

  // Internal ivars for tracking whether to rebuild
  int LastPosition[2];
  int LastPosition2[2];
  int LastSize[2];
  vtkTimeStamp  BuildTime;

private:
  vtkLeaderActor2D(const vtkLeaderActor2D&) = delete;
  void operator=(const vtkLeaderActor2D&) = delete;
};


#endif