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 "vtkRenderingContext2DModule.h" // For export macro
#include "vtkVector.h"                   // For vtkVector return type.
#include "vtkWeakPointer.h"              // Needed for weak pointer to the window.
 
class vtkContext2D;
class vtkAbstractContextItem;
class vtkTransform2D;
class vtkContextMouseEvent;
class vtkContextKeyEvent;
class vtkContextScenePrivate;
class vtkContextInteractorStyle;
 
class vtkAnnotationLink;
 
class vtkRenderer;
class vtkAbstractContextBufferId;
 
class VTKRENDERINGCONTEXT2D_EXPORT vtkContextScene : public vtkObject
{
public:
  vtkTypeMacro(vtkContextScene, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  static vtkContextScene* New();
 
  virtual bool Paint(vtkContext2D* painter);
 
  unsigned int AddItem(vtkAbstractContextItem* item);
 
  bool RemoveItem(vtkAbstractContextItem* item);
 
  bool RemoveItem(unsigned int index);
 
  vtkAbstractContextItem* GetItem(unsigned int index);
 
  unsigned int GetNumberOfItems();
 
  void ClearItems();
 
  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();
 
 
  vtkSetMacro(ScaleTiles, bool);
  vtkGetMacro(ScaleTiles, bool);
  vtkBooleanMacro(ScaleTiles, bool);
 
  vtkVector2i GetLogicalTileScale();
 
 
  virtual void SetRenderer(vtkRenderer* renderer);
  virtual vtkRenderer* GetRenderer();
 
 
  void SetDirty(bool isDirty);
  bool GetDirty() const;
 
  void ReleaseGraphicsResources();
 
  vtkWeakPointer<vtkContext2D> GetLastPainter();
 
  vtkAbstractContextBufferId* GetBufferId();
 
  virtual void SetTransform(vtkTransform2D* transform);
 
  vtkTransform2D* GetTransform();
 
  bool HasTransform() { return this->Transform != nullptr; }
 
  vtkIdType GetPickedItem(int x, int y);
 
  vtkAbstractContextItem* GetPickedItem();
 
  enum SelectionModifier
  {
    SELECTION_DEFAULT = 0, // selection = newSelection
    SELECTION_ADDITION,    // selection = prevSelection | newSelection
    SELECTION_SUBTRACTION, // selection = prevSelection & !newSelection
    SELECTION_TOGGLE       // selection = prevSelection ^ newSelection
  };
 
protected:
  vtkContextScene();
  ~vtkContextScene() override;
 
  virtual bool ProcessSelectionEvent(unsigned int rect[5]);
 
  virtual bool MouseMoveEvent(const vtkContextMouseEvent& event);
 
  virtual bool ButtonPressEvent(const vtkContextMouseEvent& event);
 
  virtual bool ButtonReleaseEvent(const vtkContextMouseEvent& event);
 
  virtual bool DoubleClickEvent(const vtkContextMouseEvent& event);
 
  virtual bool MouseWheelEvent(int delta, const vtkContextMouseEvent& event);
 
  virtual bool KeyPressEvent(const vtkContextKeyEvent& keyEvent);
 
  virtual bool KeyReleaseEvent(const vtkContextKeyEvent& keyEvent);
 
  virtual void PaintIds();
 
  void TestBufferIdSupport();
 
  void UpdateBufferId();
 
  vtkAnnotationLink* AnnotationLink;
 
  // Store the chart dimensions - width, height of scene in pixels
  int Geometry[2];
 
  friend class vtkContextInteractorStyle;
 
 
  class Private;
  Private* Storage;
 
  vtkContextScenePrivate* Children;
 
  vtkWeakPointer<vtkContext2D> LastPainter;
 
  vtkWeakPointer<vtkRenderer> Renderer;
 
  vtkAbstractContextBufferId* BufferId;
  bool BufferIdDirty;
 
  bool UseBufferId;
 
  bool BufferIdSupportTested;
  bool BufferIdSupported;
 
  bool ScaleTiles;
 
  vtkTransform2D* Transform;
 
private:
  vtkContextScene(const vtkContextScene&) = delete;
  void operator=(const vtkContextScene&) = delete;
 
  typedef bool (vtkAbstractContextItem::*MouseEvents)(const vtkContextMouseEvent&);
  bool ProcessItem(
    vtkAbstractContextItem* cur, const vtkContextMouseEvent& event, MouseEvents eventPtr);
  void EventCopy(const vtkContextMouseEvent& event);
};
 
#endif // vtkContextScene_h