dox/GUISupport/Qt/Chart/vtkQtChartLayer.h

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

  Program:   Visualization Toolkit
  Module:    vtkQtChartLayer.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.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/


#ifndef _vtkQtChartLayer_h
#define _vtkQtChartLayer_h

#include "vtkQtChartExport.h"
#include <QObject>
#include <QGraphicsItem>

#include "vtkQtChartGraphicsItemTypes.h" // needed for enum

class vtkQtChartAxis;
class vtkQtChartLayerDomain;
class vtkQtChartArea;
class QPainter;


class VTKQTCHART_EXPORT vtkQtChartLayer : public QObject, public QGraphicsItem
{
  Q_OBJECT

public:
  enum AxesCorner
    {
    BottomLeft = 0, 
    BottomRight,    
    TopLeft,        
    TopRight        
    };

  enum {Type = vtkQtChart_LayerType};

public:
  vtkQtChartLayer();
  virtual ~vtkQtChartLayer() {}

  virtual int type() const {return vtkQtChartLayer::Type;}

  vtkQtChartArea *getChartArea() const {return this->ChartArea;}

  virtual void setChartArea(vtkQtChartArea *area) {this->ChartArea = area;}

  virtual void getLayerDomain(vtkQtChartLayerDomain &domain) const;

  virtual void layoutChart(const QRectF &area)=0;

  virtual bool drawItemFilter(QGraphicsItem *item, QPainter *painter);

  virtual bool getHelpText(const QPointF &point, QString &text);

  virtual void startInteractiveResize() {}

  virtual void finishInteractiveResize() {}

signals:
  void layoutNeeded();

  void rangeChanged();

protected:
  vtkQtChartArea *ChartArea; 
};

#endif