/*=========================================================================

   Program: ParaView
   Module:    $RCSfile: pqCustomFilterManagerModel.h,v $

   Copyright (c) 2005-2008 Sandia Corporation, Kitware Inc.
   All rights reserved.

   ParaView is a free software; you can redistribute it and/or modify it
   under the terms of the ParaView license version 1.2. 

   See License_v1.2.txt for the full ParaView license.
   A copy of this license can be obtained by contacting
   Kitware Inc.
   28 Corporate Drive
   Clifton Park, NY 12065
   USA

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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========================================================================*/

/// \file pqCustomFilterManagerModel.h
/// \date 6/23/2006

#ifndef _pqCustomFilterManagerModel_h
#define _pqCustomFilterManagerModel_h


#include "pqComponentsExport.h"
#include <QAbstractListModel>

class pqCustomFilterManagerModelInternal;
class QString;


/// \class pqCustomFilterManagerModel
/// \brief
///   The pqCustomFilterManagerModel class stores the list of registered
///   pipeline custom filter definitions.
///
/// The list is modified using the \c addCustomFilter and
/// \c removeCustomFilter methods. When a new custom filter is added
/// to the model a signal is emitted. This signal can be used to
/// highlight the new custom filter.
class PQCOMPONENTS_EXPORT pqCustomFilterManagerModel : public QAbstractListModel
{
  Q_OBJECT

public:
  pqCustomFilterManagerModel(QObject *parent=0);
  virtual ~pqCustomFilterManagerModel();

  /// \name QAbstractItemModel Methods
  //@{
  /// \brief
  ///   Gets the number of rows for a given index.
  /// \param parent The parent index.
  /// \return
  ///   The number of rows for the given index.
  virtual int rowCount(const QModelIndex &parent=QModelIndex()) const;

  /// \brief
  ///   Gets a model index for a given location.
  /// \param row The row number.
  /// \param column The column number.
  /// \param parent The parent index.
  /// \return
  ///   A model index for the given location.
  virtual QModelIndex index(int row, int column,
      const QModelIndex &parent=QModelIndex()) const;

  /// \brief
  ///   Gets the data for a given model index.
  /// \param index The model index.
  /// \param role The role to get data for.
  /// \return
  ///   The data for the given model index.
  virtual QVariant data(const QModelIndex &index,
      int role=Qt::DisplayRole) const;

  /// \brief
  ///   Gets the flags for a given model index.
  ///
  /// The flags for an item indicate if it is enabled, editable, etc.
  ///
  /// \param index The model index.
  /// \return
  ///   The flags for the given model index.
  virtual Qt::ItemFlags flags(const QModelIndex &index) const;
  //@}

  /// \name Index Mapping Methods
  //@{
  /// \brief
  ///   Gets the custom filter name for the given model index.
  /// \param index The model index to look up.
  /// \return
  ///   The custom filter definition name or an empty string.
  QString getCustomFilterName(const QModelIndex &index) const;

  /// \brief
  ///   Gets the model index for the given custom filter name.
  /// \param filter The custom filter definition name to look up.
  /// \return
  ///   The model index for the given name.
  QModelIndex getIndexFor(const QString &filter) const;
  //@}

  // Save/Load custom filters from pqSettings
  void importCustomFiltersFromSettings();
  void exportCustomFiltersToSettings();

public slots:
  /// \brief
  ///   Adds a new custom filter definition to the model.
  /// \param name The name of the new custom filter definition.
  void addCustomFilter(QString name);

  /// \brief
  ///   Removes a custom filter definition from the model.
  /// \param name The name of the custom filter definition.
  void removeCustomFilter(QString name);

signals:
  /// \brief
  ///   Emitted when a new custom filter definition is added to the
  ///   model.
  /// \param name The name of the new custom filter definition.
  void customFilterAdded(const QString &name);

private:
  /// Stores the custom filter list.
  pqCustomFilterManagerModelInternal *Internal;
};

#endif
