pqTransferFunctionWidget.h

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// SPDX-FileCopyrightText: Copyright (c) Kitware Inc.
// SPDX-FileCopyrightText: Copyright (c) Sandia Corporation
// SPDX-License-Identifier: BSD-3-Clause
#ifndef pqTransferFunctionWidget_h
#define pqTransferFunctionWidget_h

#include "pqComponentsModule.h"
#include "vtkType.h"
#include <QWidget>

class vtkPiecewiseFunction;
class vtkScalarsToColors;
class vtkTable;

class PQCOMPONENTS_EXPORT pqTransferFunctionWidget : public QWidget
{
  Q_OBJECT
  typedef QWidget Superclass;

public:
  pqTransferFunctionWidget(QWidget* parent = nullptr);
  ~pqTransferFunctionWidget() override;

  void initialize(
    vtkScalarsToColors* stc, bool stc_editable, vtkPiecewiseFunction* pwf, bool pwf_editable);

  vtkIdType currentPoint() const;

  vtkIdType numberOfControlPoints() const;


  void SetLogScaleXAxis(bool logScale);
  bool GetLogScaleXAxis() const;


  vtkScalarsToColors* scalarsToColors() const;
  vtkPiecewiseFunction* piecewiseFunction() const;


  void SetControlPointsFreehandDrawing(bool use);
  bool GetControlPointsFreehandDrawing() const;

public Q_SLOTS: // NOLINT(readability-redundant-access-specifiers)
  void setCurrentPoint(vtkIdType index);

  void setCurrentPointPosition(double xpos);

  void render();

  void setHistogramTable(vtkTable* table);

Q_SIGNALS:
  void currentPointChanged(vtkIdType index);

  void controlPointsModified();

  void chartRangeModified();

  void rangeHandlesRangeChanged(double rangeMin, double rangeMax);

  void rangeHandlesDoubleClicked();

protected Q_SLOTS:
  void onCurrentChangedEvent();

  void onRangeHandlesRangeChanged();

  void showUsageStatus();

  void editColorAtCurrentControlPoint();

protected: // NOLINT(readability-redundant-access-specifiers)
  void onCurrentPointEditEvent();

private:
  Q_DISABLE_COPY(pqTransferFunctionWidget)

  class pqInternals;
  pqInternals* Internals;
};

#endif