vtkGraphItem.h

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

  Program:   Visualization Toolkit
  Module:    TestDiagram.cxx

  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 vtkGraphItem_h
#define vtkGraphItem_h

#include "vtkViewsInfovisModule.h" // For export macro
#include "vtkContextItem.h"

#include "vtkVector.h" // For vector types in API
#include "vtkColor.h" // For color types in API
#include "vtkNew.h" // For vtkNew ivars

class vtkGraph;
class vtkImageData;
class vtkIncrementalForceLayout;
class vtkRenderWindowInteractor;
class vtkTooltipItem;

class VTKVIEWSINFOVIS_EXPORT vtkGraphItem : public vtkContextItem
{
public:
  static vtkGraphItem *New();
  vtkTypeMacro(vtkGraphItem, vtkContextItem);
  void PrintSelf(ostream &os, vtkIndent indent) override;


  virtual void SetGraph(vtkGraph *graph);
  vtkGetObjectMacro(Graph, vtkGraph);

  virtual vtkIncrementalForceLayout *GetLayout();


  virtual void StartLayoutAnimation(vtkRenderWindowInteractor *interactor);
  virtual void StopLayoutAnimation();

  virtual void UpdateLayout();

protected:
  vtkGraphItem();
  ~vtkGraphItem() override;

  bool Paint(vtkContext2D *painter) override;

  virtual void RebuildBuffers();

  virtual void PaintBuffers(vtkContext2D *painter);

  virtual bool IsDirty();

  virtual vtkIdType NumberOfVertices();

  virtual vtkIdType NumberOfEdges();

  virtual vtkIdType NumberOfEdgePoints(vtkIdType edge);

  virtual float EdgeWidth(vtkIdType edge, vtkIdType point);

  virtual vtkColor4ub EdgeColor(vtkIdType edge, vtkIdType point);

  virtual vtkVector2f EdgePosition(vtkIdType edge, vtkIdType point);

  virtual float VertexSize(vtkIdType vertex);

  virtual vtkColor4ub VertexColor(vtkIdType vertex);

  virtual int VertexMarker(vtkIdType vertex);

  virtual vtkVector2f VertexPosition(vtkIdType vertex);

  virtual vtkStdString VertexTooltip(vtkIdType vertex);

  static void ProcessEvents(vtkObject *caller, unsigned long event,
                            void *clientData, void *callerData);

  virtual vtkIdType HitVertex(const vtkVector2f &pos);


  bool MouseMoveEvent(const vtkContextMouseEvent &event) override;
  bool MouseLeaveEvent(const vtkContextMouseEvent &event) override;
  bool MouseEnterEvent(const vtkContextMouseEvent &event) override;
  bool MouseButtonPressEvent(const vtkContextMouseEvent &event) override;
  bool MouseButtonReleaseEvent(const vtkContextMouseEvent &event) override;
  bool MouseWheelEvent(const vtkContextMouseEvent &event, int delta) override;

  bool Hit(const vtkContextMouseEvent &event) override;

  virtual void PlaceTooltip(vtkIdType v);

private:
  vtkGraphItem(const vtkGraphItem&) = delete;
  void operator=(const vtkGraphItem&) = delete;

  struct Internals;
  Internals *Internal;

  vtkGraph *Graph;
  vtkMTimeType GraphBuildTime;
  vtkNew<vtkImageData> Sprite;
  vtkNew<vtkIncrementalForceLayout> Layout;
  vtkNew<vtkTooltipItem> Tooltip;
};

#endif