dox/Charts/vtkContextScene.h

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

  Program:   Visualization Toolkit
  Module:    vtkContextScene.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 __vtkContextScene_h
#define __vtkContextScene_h

#include "vtkObject.h"
#include "vtkWeakPointer.h" // Needed for weak pointer to the window.
#include "vtkVector.h" // Needed for vtkVector2f

class vtkContext2D;
class vtkContextItem;
class vtkTransform2D;
class vtkContextMouseEvent;

class vtkInteractorStyle;
class vtkAnnotationLink;

class vtkRenderer;
class vtkAbstractContextBufferId;

class VTK_CHARTS_EXPORT vtkContextScene : public vtkObject
{
public:
  vtkTypeMacro(vtkContextScene, vtkObject);
  virtual void PrintSelf(ostream &os, vtkIndent indent);

  static vtkContextScene * New();

  virtual bool Paint(vtkContext2D *painter);

  void AddItem(vtkContextItem *item);

  int GetNumberOfItems();

  // Get the item at the specified index.
  vtkContextItem * GetItem(int index);

  virtual void SetAnnotationLink(vtkAnnotationLink *link);


  vtkGetObjectMacro(AnnotationLink, vtkAnnotationLink);


  vtkSetVector2Macro(Geometry, int);


  vtkGetVector2Macro(Geometry, int);


  vtkSetMacro(UseBufferId, bool);


  vtkGetMacro(UseBufferId, bool);

  virtual int GetViewWidth();

  virtual int GetViewHeight();

  int GetSceneWidth();

  int GetSceneHeight();

  void SetInteractorStyle(vtkInteractorStyle *interactor);

  virtual void SetRenderer(vtkRenderer *renderer);

  void SetDirty(bool isDirty);

//BTX
  void ReleaseGraphicsResources();
  
  vtkWeakPointer<vtkContext2D> GetLastPainter();

  vtkAbstractContextBufferId *GetBufferId();

  virtual void SetTransform(vtkTransform2D *transform);

  vtkTransform2D* GetTransform();

  bool HasTransform() { return this->Transform != 0; }

protected:
  vtkContextScene();
  ~vtkContextScene();

  void CheckForRepaint();


  virtual void ProcessEvents(vtkObject* caller, unsigned long eventId,
                             void* callData);

  virtual void ProcessSelectionEvent(vtkObject* caller, void* callData);

  virtual void MouseMoveEvent(int x, int y);

  virtual void ButtonPressEvent(int button, int x, int y);

  virtual void ButtonReleaseEvent(int button, int x, int y);

  virtual void MouseWheelEvent(int delta, int x, int y);

  virtual void PaintIds();

  vtkIdType GetPickedItem(int x, int y);

  void UpdateBufferId();

  vtkAnnotationLink *AnnotationLink;

  // Store the chart dimensions - width, height of scene in pixels
  int Geometry[2];


  class Command;
  friend class Command;
  Command *Observer;


  class Private;
  Private *Storage;

  vtkWeakPointer<vtkContext2D> LastPainter;

  vtkWeakPointer<vtkRenderer> Renderer;

  vtkAbstractContextBufferId *BufferId;
  bool BufferIdDirty;

  bool UseBufferId;

  vtkTransform2D* Transform;

  void PerformTransform(vtkTransform2D *transform, vtkContextMouseEvent &mouse);

private:
  vtkContextScene(const vtkContextScene &); // Not implemented.
  void operator=(const vtkContextScene &);   // Not implemented.
//ETX
};

//BTX
class vtkContextMouseEvent
{
public:

  enum {
    LEFT_BUTTON = 0,
    MIDDLE_BUTTON,
    RIGHT_BUTTON
  };

  vtkVector2f Pos;

  vtkVector2f ScenePos;

  vtkVector2i ScreenPos;

  vtkVector2f LastPos;

  vtkVector2f LastScenePos;

  vtkVector2i LastScreenPos;

  int Button;
};
//ETX

#endif //__vtkContextScene_h

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