dox/GUISupport/Qt/Chart/vtkQtChartLegend.h

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

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkQtChartLegend.h,v $

  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 _vtkQtChartLegend_h
#define _vtkQtChartLegend_h


#include "vtkQtChartExport.h"
#include <QWidget>

class vtkQtChartLegendInternal;
class vtkQtChartLegendModel;
class QFont;
class QPainter;
class QPoint;
class QRect;


class VTKQTCHART_EXPORT vtkQtChartLegend : public QWidget
{
  Q_OBJECT

public:
  enum LegendLocation
    {
    Left = 0,  
    Top,       
    Right,     
    Bottom     
    };

  enum ItemFlow
    {
    LeftToRight = 0, 
    TopToBottom      
    };

public:
  vtkQtChartLegend(QWidget *parent=0);
  virtual ~vtkQtChartLegend();






  vtkQtChartLegendModel *getModel() const {return this->Model;}

  LegendLocation getLocation() const {return this->Location;}

  void setLocation(LegendLocation location);

  ItemFlow getFlow() const {return this->Flow;}

  void setFlow(ItemFlow flow);

  int getOffset() const;

  virtual QSize sizeHint() const {return this->Bounds;}

  void drawLegend(QPainter &painter);

signals:
  void locationChanged();

public slots:
  void reset();

  void setEntryVisible(int index, bool visible);

  void setEntriesVisible(int first, int last, bool visible);

  void setOffset(int offset);

protected slots:
  void insertEntry(int index);

  void startEntryRemoval(int index);

  void finishEntryRemoval(int index);

  void updateEntryText(int index);

protected:
  virtual bool event(QEvent *e);

  virtual void paintEvent(QPaintEvent *e);

  virtual void resizeEvent(QResizeEvent *e);

  virtual void mousePressEvent(QMouseEvent *e);

  virtual void mouseMoveEvent(QMouseEvent *e);

  virtual void mouseReleaseEvent(QMouseEvent *e);

private:
  void calculateSize();

  void updateMaximum();

private:
  vtkQtChartLegendInternal *Internal; 
  vtkQtChartLegendModel *Model;       
  LegendLocation Location;            
  ItemFlow Flow;                      
  QSize Bounds;                       
  int IconSize;                       
  int TextSpacing;                    
  int Margin;                         

private:
  vtkQtChartLegend(const vtkQtChartLegend &);
  vtkQtChartLegend &operator=(const vtkQtChartLegend &);
};

#endif

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