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/*
    Copyright 2007 Pino Toscano <pino@kde.org>
    Copyright 2007 Robert Knight <robertknight@gmail.com>

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#ifndef APPLICATIONMODEL_H
#define APPLICATIONMODEL_H

#include "kickoffabstractmodel.h"
#include "models.h"

namespace Plasma
{
    class Applet;
} // namespace Plasma

namespace Kickoff
{

class ApplicationModelPrivate;

/**
 * ApplicationModel provides a tree model containing all of the user's installed graphical programs.
 * The applications are arranged into categories, based on the information in their .desktop files.
 */
class ApplicationModel : public KickoffAbstractModel
{
    Q_OBJECT

    Q_PROPERTY(bool sortAppsByName READ sortAppsByName WRITE setSortAppsByName NOTIFY sortAppsByNameChanged)

public:
    ApplicationModel(QObject *parent = 0, bool allowSeparators = false);
    virtual ~ApplicationModel();

    /**
     * This enum describes the policy for
     * handling duplicate applications (that is,
     * two applications with the same name in the same group)
     */
    enum DuplicatePolicy {
        /** Display duplicate entries. */
        ShowDuplicatesPolicy,
        /**
         * Show only the entry for the most recent
         * version of the application.
         *
         * Currently only a crude heuristic to determine whether the
         * application is from KDE 3 or KDE 4 is used to determine
         * recent-ness.
         *
         * eg.  If MyGame/KDE 3 and MyGame/KDE 4 are found
         * show only MyGame/KDE 4
         */
        ShowLatestOnlyPolicy
    };

    /**
     * This enum describes the policy for
     * handling applications that are configured to appear
     * in the System tab.
     */
    enum SystemApplicationPolicy {
        /** Display entries in Applications tab and System tab. */
        ShowApplicationAndSystemPolicy,
        /** Display entry only in System tab. */
        ShowSystemOnlyPolicy
    };

    /**
     * Sets the policy for handling duplicate applications.
     * See DuplicatePolicy
     */
    void setDuplicatePolicy(DuplicatePolicy policy);
    /** See setDuplicatePolicy() */
    DuplicatePolicy duplicatePolicy() const;

    /**
     * Sets the policy for handling System applications.
     * See SystemApplicationPolicy
     */
    void setSystemApplicationPolicy(SystemApplicationPolicy policy);
    /** See setSystemApplicationPolicy() */
    SystemApplicationPolicy systemApplicationPolicy() const;

    // reimplemented from QAbstractItemModel
    virtual bool canFetchMore(const QModelIndex &parent) const;
    virtual int columnCount(const QModelIndex &parent = QModelIndex()) const;
    virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const;
    virtual void fetchMore(const QModelIndex &parent);
    virtual bool hasChildren(const QModelIndex &parent = QModelIndex()) const;
    virtual QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
    virtual QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const;
    virtual QModelIndex parent(const QModelIndex &index) const;
    virtual int rowCount(const QModelIndex &parent = QModelIndex()) const;

    void setApplet(Plasma::Applet *applet);
    bool showRecentlyInstalled() const;
    void setShowRecentlyInstalled(bool showRecentlyInstalled);

    bool sortAppsByName() const;
    void setSortAppsByName(bool sortAppsByName);

    Q_INVOKABLE int rowForModelIndex(const QModelIndex &index) const;

Q_SIGNALS:
    void sortAppsByNameChanged();

public Q_SLOTS:
    void reloadMenu();
    void checkSycocaChange(const QStringList &changes);

private:
    friend class ApplicationModelPrivate;
    ApplicationModelPrivate *const d;

    void createNewProgramList();
    bool createNewProgramListForPath(const QString &relPath);

    Q_DISABLE_COPY(ApplicationModel)
};

}

#endif