vtkGraphItem.h 2.32 KB
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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkGraphItem.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.

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

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/**
 * @class   vtkGraphItem
 * @brief   a vtkContextItem that draws a block (optional label).
 *
 *
 * This is a vtkContextItem that can be placed into a vtkContextScene. It draws
 * a block of the given dimensions, and reacts to mouse events.
*/
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#ifndef vtkGraphItem_h
#define vtkGraphItem_h
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#include "vtkContextItem.h"

class vtkContext2D;
class vtkGraph;

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

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

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  /**
   * Paint event for the item.
   */
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  bool Paint(vtkContext2D *painter) override;
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  /**
   * Returns true if the supplied x, y coordinate is inside the item.
   */
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  bool Hit(const vtkContextMouseEvent &mouse) override;
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  /**
   * Mouse enter event.
   */
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  bool MouseEnterEvent(const vtkContextMouseEvent &mouse) override;
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  /**
   * Mouse move event.
   */
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  bool MouseMoveEvent(const vtkContextMouseEvent &mouse) override;
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  /**
   * Mouse leave event.
   */
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  bool MouseLeaveEvent(const vtkContextMouseEvent &mouse) override;
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  /**
   * Mouse button down event.
   */
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  bool MouseButtonPressEvent(const vtkContextMouseEvent &mouse) override;
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  /**
   * Mouse button release event.
   */
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  bool MouseButtonReleaseEvent(const vtkContextMouseEvent &mouse) override;
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  void UpdatePositions();

protected:
  vtkGraphItem();
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  ~vtkGraphItem() override;
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  float LastPosition[2];

  bool MouseOver;
  int MouseButtonPressed;

  vtkGraph* Graph;
  vtkIdType HitVertex;

  class Implementation;
  Implementation* Impl;

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

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#endif //vtkGraphItem_h