TransferFunctionViewer.hpp

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//
// This file is part of MorphoGraphX - http://www.MorphoGraphX.org
// Copyright (C) 2012-2015 Richard S. Smith and collaborators.
//
// If you use MorphoGraphX in your work, please cite:
//   http://dx.doi.org/10.7554/eLife.05864
//
// MorphoGraphX is free software, and is licensed under under the terms of the 
// GNU General (GPL) Public License version 2.0, http://www.gnu.org/licenses.
// 
#ifndef QTRANSFERFUNCTIONVIEWER_HPP
#define QTRANSFERFUNCTIONVIEWER_HPP
 
#include "Config.hpp"
#include <QLinearGradient>
#include <QWidget>
#include <QColor>
#include <QPainterPath>
#include "TransferFunction.hpp"
 
#include <vector>
 
class QMouseEvent;
class QPixmap;
class QAction;
class QPaintEvent;
 
class mgxBase_EXPORT QTransferFunctionViewer : public QWidget
{
  Q_OBJECT
public:
  typedef TransferFunction::Colorf Colorf;
  enum BackgroundType
  {
    BG_CHECKS,
    BG_WHITE,
    BG_BLACK
  };
 
  QTransferFunctionViewer(QWidget *parent = 0, Qt::WindowFlags f = 0);
  virtual ~QTransferFunctionViewer() {}
 
  size_t nbValues() const;
 
  const TransferFunction& transferFunction() const { return transfer_fct; }
 
public slots:
  void changeNbValues(int n);
  void reverseFunction();
  void changeTransferFunction(const TransferFunction& fct);
  void setupGradient();
  void setHistogram(const std::vector<double>& h);
  void setBounds(double min, double max);
  void setStickers(const std::vector<double>& s);
  void setMarkerSize(int s);
  void setCheckSize(int s);
  void setBackgroundType(BackgroundType type);
  void setInterpolation(TransferFunction::Interpolation i);
  void setSelectionColor(QColor col);
  void editMarkers();
  void autoAdjust();
 
signals:
  void changedTransferFunction(const TransferFunction& fct);
 
protected:
  void paintEvent(QPaintEvent *event);
  void mouseDoubleClickEvent(QMouseEvent *e);
  void mousePressEvent(QMouseEvent *e);
  void mouseReleaseEvent(QMouseEvent *e);
  void mouseMoveEvent(QMouseEvent *e);
  void resetMouseInteraction();
 
  void prepareHistogram();
 
  void createBackground();
  QPixmap createChecks();
 
  TransferFunction transfer_fct;
  std::vector<double> histogram, hist_values;
  double minValue, maxValue;
  QPainterPath hist_shape;
  bool use_histogram;
  std::vector<double> stickers;
  bool sticking;
  int marker_size;
  bool select_pos;
  double current_pos;
  int bg_size;
  double bg_bright;
  double bg_dark;
  QColor activ_pos_color;
  Colorf saved_color;
  double saved_pos;
  QAction *reverse_act, *edit_markers;
  QLinearGradient gradient;
  BackgroundType bg_type;
  size_t _nb_values;
};
 
#endif