pqHierarchicalGridLayout.h

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

#include <QLayout>
#include <QScopedPointer> // for ivar

#include "pqWidgetsModule.h" // for export macros

class PQWIDGETS_EXPORT pqHierarchicalGridLayout : public QLayout
{
  Q_OBJECT
  typedef QLayout Superclass;

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


  void addItem(QLayoutItem* item) override;
  QLayoutItem* itemAt(int index) const override;
  QLayoutItem* takeAt(int index) override;
  int count() const override;


  QSize minimumSize() const override;
  void setGeometry(const QRect& rect) override;
  QSize sizeHint() const override;


  bool isLocationValid(int location) const;


  void split(int location, Qt::Orientation direction, double splitFraction);
  void splitAny(int location, double splitFraction);
  void splitVertical(int location, double splitFraction)
  {
    this->split(location, Qt::Vertical, splitFraction);
  }
  void splitHorizontal(int location, double splitFraction)
  {
    this->split(location, Qt::Horizontal, splitFraction);
  }

  void setSplitFraction(int location, double splitFraction);


  void maximize(int location);

  class Item
  {
  public:
    Item(Qt::Orientation direction, double fraction)
      : Direction(direction)
      , Fraction(fraction)
    {
    }
    Item(QWidget* widget = nullptr)
      : Widget(widget)
    {
    }

  private:
    QWidget* Widget = nullptr;
    Qt::Orientation Direction = Qt::Horizontal;
    double Fraction = -1.0;
    friend class pqHierarchicalGridLayout;
  };

  QVector<QWidget*> rearrange(const QVector<Item>& layout);

private:
  Q_DISABLE_COPY(pqHierarchicalGridLayout);

  class pqInternals;
  QScopedPointer<pqInternals> Internals;
};

#endif