kde-workspace/libs/taskmanager/abstractsortingstrategy.h

/*****************************************************************

Copyright 2008 Christian Mollekopf <chrigi_1@hotmail.com>

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******************************************************************/

#ifndef ABSTRACTSORTINGSTRATEGY_H
#define ABSTRACTSORTINGSTRATEGY_H

#include <QtCore/QObject>

#include <taskmanager/abstractgroupableitem.h>
#include <taskmanager/groupmanager.h>
#include <taskmanager/taskmanager_export.h>

namespace TaskManager
{

/**
 * Base class for strategies which can be used to
 * automatically sort tasks.
 */
class TASKMANAGER_EXPORT AbstractSortingStrategy : public QObject
{
    Q_OBJECT
public:
    AbstractSortingStrategy(QObject *parent);
    virtual ~AbstractSortingStrategy();

    /** Returns the strategy type */
    GroupManager::TaskSortingStrategy type() const;

    /** Adds group under control of sorting strategy. all added subgroups are automatically added to this sortingStrategy*/
    void handleGroup(TaskGroup *);

    /** Moves Item to new index*/
    bool moveItem(AbstractGroupableItem *, int);
    /**Reimplement this to support manual sorting*/
    virtual bool manualSortingRequest(AbstractGroupableItem *item, int newIndex);

public Q_SLOTS:
    /** Handles a new item, is typically called after an item was added to a handled group*/
    virtual void handleItem(AbstractGroupableItem *);
    /** Checks if the order has to be updated. Must be connected to a AbstractGroupableItem* */
    void check(AbstractGroupableItem *item = 0);

protected Q_SLOTS:
    void removeGroup(); //FIXME necessary?

protected:
    void setType(GroupManager::TaskSortingStrategy strategy);

private:
    /**
     * Sorts list of items according to startegy.
     * Has to be reimplemented by every SortingStrategy.
     *
     * @param items the items that are to be sorted; the list is passed
     *        in by value and should be in the proprer sorting order when
     *        the method returns.
     */
    virtual void sortItems(ItemList &ites);

    class Private;
    Private * const d;
};

typedef QHash <int, WindowList> itemHashTable;
typedef QHash <int, itemHashTable*> desktopHashTable;

} // TaskManager namespace
#endif