// $Id$
// BoilerTreeView.hpp
//
// CLASSES:
//  class BoilerTreeView               : public QTreeView
//  class BoilerTreeView::ItemModel    : public QAbstractItemModel
//  class BoilerTreeView::ItemDelegate : public QStyledItemDelegate
//
// SEE COMMENTS in BoilerTreeView.cpp.
//
//--

#ifndef BoilerTreeViewINCLUDED
#define BoilerTreeViewINCLUDED

#include <QTreeView>
#include <QAbstractItemModel>
#include <QStyledItemDelegate>

// ******************************************
// ***  class BoilerTreeView : QTreeView  ***
// ******************************************

class BoilerTreeView : public QTreeView
{
  Q_OBJECT

  private:
   class ItemModel;      // declared below, a QAbstractItemModel
   class ItemDelegate;   // declared below, a QStyledItemDelegate

  private:
   ItemModel*    _itemModel;
   ItemDelegate* _itemDelegate;

  public:
   BoilerTreeView (QWidget* parentWid);
   virtual ~BoilerTreeView();
};

// **************************************************************
// ***  class BoilerTreeView::ItemModel : QAbstractItemModel  ***
// **************************************************************

class BoilerTreeView::ItemModel : public QAbstractItemModel
{
  Q_OBJECT

  private:
   BoilerTreeView* _parentTreeView;

  public:
   ItemModel (BoilerTreeView* parentTreeView);
   virtual ~ItemModel();

   // *************************************************
   // ***  Virtual methods from QAbstractItemModel  ***
   // *************************************************

  public:
   Qt::ItemFlags flags (const QModelIndex&) const;
   QModelIndex index (int row, int col, 
                     const QModelIndex& parent=QModelIndex()) const;
   
   QModelIndex parent (const QModelIndex&) const { return QModelIndex(); }
   int rowCount (const QModelIndex& parent=QModelIndex()) const;
   int columnCount (const QModelIndex& parent=QModelIndex()) const;

   QVariant data (const QModelIndex&, int role=Qt::DisplayRole) const;
   QVariant headerData (int section, Qt::Orientation, 
                                            int role=Qt::DisplayRole) const;

   bool setData (const QModelIndex&, const QVariant&, int role=Qt::EditRole);

   // -------------------------------------------------
};

// ******************************************************************
// ***  class BoilerTreeView::ItemDelegate : QStyledItemDelegate  ***
// ******************************************************************

class BoilerTreeView::ItemDelegate : public QStyledItemDelegate
{
  Q_OBJECT

  private:
   BoilerTreeView* _parentTreeView;

  public:
   ItemDelegate (BoilerTreeView* parentTreeView);
   virtual ~ItemDelegate();

   // ****************************************************
   // ***  Virtual methods from QAbstractItemDelegate  ***
   // ****************************************************

   // Note: when defering to the base class implementation, make sure 
   // to call the direct base class method, i.e. of QStyledItemDelegate.

   QWidget* createEditor (QWidget* parent, const QStyleOptionViewItem&, 
                          const QModelIndex&) const;

   void setEditorData (QWidget* editor, const QModelIndex&) const;

   void setModelData (QWidget* editor, QAbstractItemModel* itemModel, 
                      const QModelIndex&) const;
};

#endif // BoilerTreeViewINCLUDED
//--- (end BoilerTreeView.hpp) ---