#pragma once

#ifndef FUNCTIONVIEWER_H

#define FUNCTIONVIEWER_H

// TnzCore includes

#include "tcommon.h"

#include "saveloadqsettings.h"

// TnzLib includes

#include "toonz/tframehandle.h"

#include "toonz/preferences.h"

// TnzQt includes

#include "toonzqt/treemodel.h"

// Qt includes

#include <qsplitter></qsplitter>

#include <qsettings></qsettings>

#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 declarations

class TParam;

class TDoubleParam;

class TXsheetHandle;

class TObjectHandle;

class TFxHandle;

class TColumnHandle;

class TStageObject;

class TSceneHandle;

class FrameNavigator;

class FunctionTreeView;

class FunctionPanel;

class FunctionSheet;

class FunctionKeyframeNavigator;

class FunctionSegmentViewer;

class FunctionToolbar;

class FunctionSelection;

class QStackedWidget;

class QAction;

class QScrollArea;

class QSplitter;

class QVBoxLayout;

namespace DVGui {

class ValueField;

}

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

//************************************************************************

//    FunctionViewer  declaration

//************************************************************************

// Function editor widget

class DVAPI FunctionViewer final : public QSplitter, public SaveLoadQSettings {

  Q_OBJECT

public:

  enum IoType { eSaveCurve, eLoadCurve, eExportCurve };

public:

  FunctionViewer(QWidget *parent       = 0,

                 Qt::WindowFlags flags = Qt::WindowFlags());

  ~FunctionViewer();

  void setXsheetHandle(TXsheetHandle *xshHandle);  //!< Associates an xsheet to

                                                   //! the function editor.

  void setFrameHandle(TFrameHandle *frameHandle);  //!< Synchronizes an external

  //! timeline with the function

  //! editor.

  void setObjectHandle(TObjectHandle *objectHandle);  //!< Associates a stage

  //! objects selector to the

  //! function editor.

  void setFxHandle(TFxHandle *fxHandle);  //!< Associates an fx selector to the

                                          //! function editor.

  void setColumnHandle(TColumnHandle *columnHandle);  //!< Associates a column

                                                      //! selector to the

  //! function editor.

  FunctionSelection *getSelection() const { return m_selection; }

  void openContextMenu(TreeModel::Item *item, const QPoint &globalPos);

  void addParameter(TParam *parameter,

                    const TFilePath &folder = TFilePath());  //!< Adds the

                                                             //! specified

  //! parameter to the

  //! function editor.

  //!\param parameter

  //! Parameter to be

  //! added. Ownership

  //! remains \a

  //! external. \param

  //! folder Host

  //! folder (created

  //! if necessary)

  //! the parameter

  //! will be added

  //! to.

  void setFocusColumnsOrGraph();

  void clearFocusColumnsAndGraph();

  bool columnsOrGraphHasFocus();

  void setSceneHandle(TSceneHandle *sceneHandle);

  TSceneHandle *getSceneHandle() const { return m_sceneHandle; }

  TXsheetHandle *getXsheetHandle() const { return m_xshHandle; }

  // SaveLoadQSettings

  virtual void save(QSettings &settings) const override;

  virtual void load(QSettings &settings) override;

  // refer to the preferences' "Current Column Color"

  QColor getCurrentTextColor() const;

signals:

  void curveChanged();

  void curveIo(int type, TDoubleParam *curve, const std::string &name);

  void editObject();

public slots:

  void refreshModel();

  void rebuildModel();

  void onFrameSwitched();

  void toggleMode();

  void onValueFieldChanged();

  void onXsheetChanged();

  void onStageObjectSwitched();

  void onStageObjectChanged(bool isDragging = false);

  void onFxSwitched();

  void onCurveChanged(bool isDragging);

  void onCurveSelected(TDoubleParam *);

  void onSelectionChanged();

  void onPreferenceChanged(const QString &);

  void doSwitchCurrentObject(TStageObject *obj);

  void doSwitchCurrentFx(TFx *fx);

  // in order to avoid FunctionViewer to get focus while editing the expression

  bool isExpressionPageActive();

private:

  // Handles

  TXsheetHandle *m_xshHandle;

  TFrameHandle *m_frameHandle;

  TObjectHandle *m_objectHandle;

  TFxHandle *m_fxHandle;

  TColumnHandle *m_columnHandle;

  TSceneHandle *m_sceneHandle;

  QVBoxLayout *m_leftLayout;

  int m_spacing;

  int m_toggleStatus = 0;

  Preferences::FunctionEditorToggle m_toggleStart;

  TFrameHandle

      m_localFrame;  //!< Internal timeline - which is attached to m_frameHandle

                     //!  in case it is not zero.

  // Widgets

  FunctionTreeView *m_treeView;  //!< Tree view on the left side of the viewer.

  FunctionToolbar *m_toolbar;    //!< Central area's toolbar

  FunctionPanel *m_functionGraph;     //!< The function graph view widget.

  FunctionSheet *m_numericalColumns;  //!< The numerical columns view widget.

  FunctionSegmentViewer *m_segmentViewer;  //!< Lower segment editor.

  // Current objects

  TDoubleParam *m_curve;

  FunctionSelection *m_selection;

private:

  void showEvent(QShowEvent *) override;

  void hideEvent(QHideEvent *) override;

public:  //  :(

  void emitCurveChanged() {

    emit curveChanged();

  }  //!< \deprecated  Should not be public.

  void emitIoCurve(int type, TDoubleParam *curve, const std::string &name) {

    emit curveIo(type, curve, name);

  }  //!< \deprecated  Should not be public.

private slots:

  void propagateExternalSetFrame();  //!< Forwards m_frameHandle's setFrame()

                                     //! invocations to m_localFrame.

};

#endif  // FUNCTIONEDITORVIEWER_H