OverlayLayout.h++

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#ifndef __libquark_gui_OverlayLayout_hxx
#define __libquark_gui_OverlayLayout_hxx

#include <QLayout>
#include <QList>
#include <QScopedPointer>
#include <QWidgetItem>

#include <quark/Quark.h++>

namespace quark {
namespace gui {

class LIBQUARK_API OverlayLayout : public QLayout
{
  public:

  enum Position { Left, Top, Bottom, Right, Center };

  explicit OverlayLayout(QWidget *parent);
  virtual ~OverlayLayout();

  virtual void addItem(QLayoutItem *item);
  void addWidget(QWidget *widget, Position position);
  virtual Qt::Orientations expandingDirections() const;
  virtual bool hasHeightForWidth() const;
  virtual int count() const;
  virtual QLayoutItem *itemAt(int index) const;
  virtual QSize minimumSize() const;
  virtual void setGeometry(const QRect &rect);
  virtual QSize sizeHint() const;
  virtual QLayoutItem *takeAt(int index);

  void add(QLayoutItem *item, Position position);

  private:

  struct ItemWrapper
  {
    ItemWrapper(QLayoutItem *item, Position position)
      : item(item), position(position)
    { }

    ~ItemWrapper()
    {
    }

    QLayoutItem *release() {
      return item.take();
    }

    QScopedPointer<QLayoutItem> item;
    Position position;
  };

  enum SizeType { MinimumSize, SizeHint };
  QSize calculateSize(SizeType sizeType) const;

  QList<ItemWrapper *> _list;
};

} // namespace gui
} // namespace quark

#endif // __libquark_gui_OverlayLayout_hxx