vtkBalloonRepresentation.h

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/*=========================================================================
 
  Program:   Visualization Toolkit
  Module:    vtkBalloonRepresentation.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 vtkBalloonRepresentation_h
#define vtkBalloonRepresentation_h
 
#include "vtkInteractionWidgetsModule.h" // For export macro
#include "vtkWidgetRepresentation.h"
 
class vtkTextMapper;
class vtkTextActor;
class vtkTextProperty;
class vtkPoints;
class vtkCellArray;
class vtkPolyData;
class vtkPolyDataMapper2D;
class vtkActor2D;
class vtkProperty2D;
class vtkImageData;
class vtkTexture;
class vtkPoints;
class vtkPolyData;
class vtkPolyDataMapper2D;
class vtkTexturedActor2D;
 
class VTKINTERACTIONWIDGETS_EXPORT vtkBalloonRepresentation : public vtkWidgetRepresentation
{
public:
  static vtkBalloonRepresentation* New();
 
 
  vtkTypeMacro(vtkBalloonRepresentation, vtkWidgetRepresentation);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
 
  virtual void SetBalloonImage(vtkImageData* img);
  vtkGetObjectMacro(BalloonImage, vtkImageData);
 
 
  vtkGetStringMacro(BalloonText);
  vtkSetStringMacro(BalloonText);
 
 
  vtkSetVector2Macro(ImageSize, int);
  vtkGetVector2Macro(ImageSize, int);
 
 
  virtual void SetTextProperty(vtkTextProperty* p);
  vtkGetObjectMacro(TextProperty, vtkTextProperty);
 
 
  virtual void SetFrameProperty(vtkProperty2D* p);
  vtkGetObjectMacro(FrameProperty, vtkProperty2D);
 
 
  virtual void SetImageProperty(vtkProperty2D* p);
  vtkGetObjectMacro(ImageProperty, vtkProperty2D);
 
  enum
  {
    ImageLeft = 0,
    ImageRight,
    ImageBottom,
    ImageTop
  };
 
 
  vtkSetMacro(BalloonLayout, int);
  vtkGetMacro(BalloonLayout, int);
  void SetBalloonLayoutToImageLeft() { this->SetBalloonLayout(ImageLeft); }
  void SetBalloonLayoutToImageRight() { this->SetBalloonLayout(ImageRight); }
  void SetBalloonLayoutToImageBottom() { this->SetBalloonLayout(ImageBottom); }
  void SetBalloonLayoutToImageTop() { this->SetBalloonLayout(ImageTop); }
  void SetBalloonLayoutToTextLeft() { this->SetBalloonLayout(ImageRight); }
  void SetBalloonLayoutToTextRight() { this->SetBalloonLayout(ImageLeft); }
  void SetBalloonLayoutToTextTop() { this->SetBalloonLayout(ImageBottom); }
  void SetBalloonLayoutToTextBottom() { this->SetBalloonLayout(ImageTop); }
 
 
  vtkSetVector2Macro(Offset, int);
  vtkGetVector2Macro(Offset, int);
 
 
  vtkSetClampMacro(Padding, int, 0, 100);
  vtkGetMacro(Padding, int);
 
 
  void StartWidgetInteraction(double e[2]) override;
  void EndWidgetInteraction(double e[2]) override;
  void BuildRepresentation() override;
  int ComputeInteractionState(int X, int Y, int modify = 0) override;
 
 
  void ReleaseGraphicsResources(vtkWindow* w) override;
  int RenderOverlay(vtkViewport* viewport) override;
 
  enum _InteractionState
  {
    Outside = 0,
    OnText,
    OnImage
  };
 
protected:
  vtkBalloonRepresentation();
  ~vtkBalloonRepresentation() override;
 
  // The balloon text and image
  char* BalloonText;
  vtkImageData* BalloonImage;
 
  // The layout of the balloon
  int BalloonLayout;
 
  // Controlling placement
  int Padding;
  int Offset[2];
  int ImageSize[2];
 
  // Represent the text
  vtkTextMapper* TextMapper;
  vtkActor2D* TextActor;
  vtkTextProperty* TextProperty;
 
  // Represent the image
  vtkTexture* Texture;
  vtkPolyData* TexturePolyData;
  vtkPoints* TexturePoints;
  vtkPolyDataMapper2D* TextureMapper;
  vtkTexturedActor2D* TextureActor;
  vtkProperty2D* ImageProperty;
 
  // The frame
  vtkPoints* FramePoints;
  vtkCellArray* FramePolygon;
  vtkPolyData* FramePolyData;
  vtkPolyDataMapper2D* FrameMapper;
  vtkActor2D* FrameActor;
  vtkProperty2D* FrameProperty;
 
  // Internal variable controlling rendering process
  int TextVisible;
  int ImageVisible;
 
  // Helper methods
  void AdjustImageSize(double imageSize[2]);
  void ScaleImage(double imageSize[2], double scale);
 
private:
  vtkBalloonRepresentation(const vtkBalloonRepresentation&) = delete;
  void operator=(const vtkBalloonRepresentation&) = delete;
};
 
#endif