#pragma once

#ifndef TONECURVEFIELD_H

#define TONECURVEFIELD_H

#include "tcommon.h"

#include "tstroke.h"

#include "toonzqt/histogram.h"

#include <qwidget></qwidget>

#undef DVAPI

#undef DVVAR

#ifdef TOONZQT_EXPORTS

#define DVAPI DV_EXPORT_API

#define DVVAR DV_EXPORT_VAR

#else

#define DVAPI DV_IMPORT_API

#define DVVAR DV_IMPORT_VAR

#endif

// forward declaration

class TStroke;

class QPainterPath;

class QStackedWidget;

class FxHistogramRender;

//=============================================================================

namespace DVGui {

// forward declaration

class IntPairField;

class CheckBox;

//=============================================================================

// ChennelCurveEditor

//-----------------------------------------------------------------------------

class DVAPI ChennelCurveEditor final : public QWidget {

  Q_OBJECT

  HistogramView *m_histogramView;

  ChannelBar *m_verticalChannelBar;

  QList<qpointf> m_points;</qpointf>

  int m_currentControlPointIndex;

  Qt::MouseButton m_mouseButton;

  int m_curveHeight;

  int m_LeftRightMargin;

  int m_TopMargin;

  int m_BottomMargin;

  bool m_isLinear;

public:

  ChennelCurveEditor(QWidget *parent = 0, HistogramView *histogramView = 0);

  void setPoints(QList<tpointd> points);</tpointd>

  QList<tpointd> getPoints();</tpointd>

  int getCurrentControlPointIndex() { return m_currentControlPointIndex; };

  void setCurrentControlPointIndex(int index) {

    m_currentControlPointIndex = index;

  };

  bool eventFilter(QObject *object, QEvent *event) override;

  void setFirstLastXPosition(std::pair<int, int=""> values, bool isDragging);</int,>

  void setLinear(bool isLinear);

protected:

  QPointF strokeToViewPoint(const TPointD p);

  TPointD viewToStrokePoint(const QPointF &p);

  int getClosestPointIndex(const QPointF &pos, double &minDistance2) const;

  bool isCentralControlPoint(int index) { return index % 3 == 0; }

  bool isLeftControlPoint(int index) { return index % 3 == 2; }

  bool isRightControlPoint(int index) { return index % 3 == 1; }

  void movePoint(int index, const QPointF delta);

  void setPoint(int index, const QPointF point);

  QPointF checkPoint(const QPointF p);

  void moveCurrentControlPoint(const QPointF delta);

  void moveCentralControlPoint(int index, const QPointF delta);

  //	bool eraseControlPointWhileMove(int index, const QPointF delta);

  void addControlPoint(double percent);

  void removeControlPoint(int index);

  void removeCurrentControlPoint();

  QPainterPath getPainterPath();

  void paintEvent(QPaintEvent *) override;

  void mouseMoveEvent(QMouseEvent *) override;

  void mousePressEvent(QMouseEvent *) override;

  void mouseReleaseEvent(QMouseEvent *) override;

  void keyPressEvent(QKeyEvent *e) override;

  void enterEvent(QEvent *) override;

  void leaveEvent(QEvent *) override;

  void focusInEvent(QFocusEvent *fe) override;

  void focusOutEvent(QFocusEvent *fe) override;

signals:

  void focusOut();

  void controlPointChanged(bool isDragging);

  void controlPointAdded(int index);

  void controlPointRemoved(int index);

  void firstLastXPostionChanged(int, int);

};

//=============================================================================

// ToneCurveField

//-----------------------------------------------------------------------------

class DVAPI ToneCurveField final : public QWidget {

  Q_OBJECT

  QStackedWidget *m_toneCurveStackedWidget;

  QStackedWidget *m_sliderStackedWidget;

  QComboBox *m_channelListChooser;

  CheckBox *m_isLinearCheckBox;

public:

  ToneCurveField(QWidget *parent = 0, FxHistogramRender *fxHistogramRender = 0);

  void setCurrentChannel(int currentChannel);

  ChennelCurveEditor *getChannelEditor(int channel) const;

  ChennelCurveEditor *getCurrentChannelEditor() const;

  IntPairField *getCurrentSlider() const;

  int getChannelCount() { return m_toneCurveStackedWidget->count(); }

  void setIsLinearCheckBox(bool isChecked);

protected slots:

  void sliderValueChanged(bool);

  void onFirstLastXPostionChanged(int, int);

public slots:

  void setLinear(bool);

  void setLinearManually(bool);

signals:

  void currentChannelIndexChanged(int);

  void isLinearChanged(bool);

};

}

#endif  // TONECURVEFIELD_H