// $Id: DiagMsgDataModel.hpp,v 1.2 2012/02/26 19:50:52 philw Exp $
// Diagnostic Message List QAbstractTableModel
//
// CLASSES:
//  class DiagMsgDataModel : public QAbstractTableModel
//   ... devised for use with QTreeViews (not QTableViews).
//
//  class DiagMsgDataModel::Rec      // message line record
//  class DiagMsgDataModel::Block    // block of message line records
//--

#ifndef DiagMsgDataModelINCLUDED
#define DiagMsgDataModelINCLUDED

#ifndef cwReturnStatusINCLUDED
#include "cwReturnStatus.hpp"   // for okstat
#endif

#ifndef cwDiagINCLUDED
#include "cwDiag.hpp"
#endif

#include <QAbstractTableModel>
#include <QString>

//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------

// ******************************************************
// ***  class DiagMsgDataModel : QAbstractTableModel  ***
// ******************************************************

class DiagMsgDataModel : public QAbstractTableModel
{
  Q_OBJECT

  public:
   enum {
    COL_LNUM  = 0,  // Column: Line Number 
    COL_CTX   = 1,  // Column: Context 
    COL_MSG   = 2,  // Column: Message
    COL_COUNT = 3   // Number of columns
  };

  public:
   class Rec;      // message line record
   class Block;    // block of message line records

  private:
   // Two-level message record list
   QList<Block> _messageBlockList;

   // Column geometry computations
   int _ctxMaxCharCnt;    // [chars]
   int _msgMaxCharCnt;    // [chars]
   int _ctxColDataWidth;  // [pixels]
   int _msgColDataWidth;  // [pixels]

  public:
   DiagMsgDataModel (QObject* parentObj);
   virtual ~DiagMsgDataModel();

  public:
   // *** Virtual methods from QAbstractTableModel ***
   int rowCount (const QModelIndex& parentInx=QModelIndex()) const;
   int columnCount (const QModelIndex& parentInx=QModelIndex()) const;

   QVariant data (const QModelIndex&, int role=Qt::DisplayRole) const;
   QVariant headerData (int section, Qt::Orientation, 
                        int role=Qt::DisplayRole) const;
  public:
    void clearItems();
    int itemCount() const;
    void appendItem (cwDiagLevel, const QString& ctx, const QString& msg,
                     const QWidget* refWid);

    const Rec& record (int lineInx) const;
    const QString& ctxStr (int lineInx) const;
    const QString& msgStr (int lineInx) const;
    cwDiagLevel level (int lineInx) const;
    QString displayText (int lineInx, int col) const;
    QString headerText (int col) const;

    int ctxColDataWidth() const { return _ctxColDataWidth; }  // [pixels]
    int msgColDataWidth() const { return _msgColDataWidth; }  // [pixels]
};

//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------

// *************************************************************
// ***  class DiagMsgDataModel : Rec  (message line record)  ***
// *************************************************************

class DiagMsgDataModel::Rec
{
  private:
    QString _ctxStr;
    QString _msgStr;
    cwDiagLevel _level;    // See Utils/cwDiag.hpp

  public:
    Rec()
     : _ctxStr (QString::null), _msgStr (QString::null), 
       _level (cwDiagNone) {}

    Rec (const QString& ctxStr, const QString& msgStr, cwDiagLevel level)
     : _ctxStr (ctxStr), _msgStr (msgStr), _level (level) {}

    const QString& ctxStr() const { return _ctxStr; }
    const QString& msgStr() const { return _msgStr; }
    cwDiagLevel    level()  const { return _level;  }
};

//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------

// *************************************************************************
// ***  class DiagMsgDataModel : Block  (block of message line records)  ***
// *************************************************************************

class DiagMsgDataModel::Block
{
  public:
    enum { CAPACITY = 1000 };

  private:
    int _count;
    Rec _recArray [CAPACITY];

  public:
    Block() : _count (0) {}
    ~Block() { _count = 0; }

    int recCount() const { return (_count); }
    bool isEmpty() const { return (_count <= 0); }
    bool isFull()  const { return (_count >= CAPACITY); }

    okstat appendItem (cwDiagLevel, const QString& ctx, const QString& msg);

    const Rec& record (int recIndex) const;
    const QString& ctxStr (int recIndex) const;
    const QString& msgStr (int recIndex) const;
    cwDiagLevel level (int recIndex) const;
};

#endif // DiagMsgDataModelINCLUDED
//--- (end DiagMsgDataModel.hpp) ---