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/***************************************************************************
begin : Mon May 5 2003
copyright : (C) 2003 - 2004 by Scott Wheeler
email : wheeler@kde.org
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#ifndef DYNAMICPLAYLIST_H
#define DYNAMICPLAYLIST_H
#include "playlist.h"
/**
* A Playlist that is a union of other playlists that is created dynamically.
*/
class DynamicPlaylist : public Playlist
{
Q_OBJECT
public:
/**
* Creates a dynamic playlist based on lists.
*/
DynamicPlaylist(const PlaylistList &lists,
PlaylistCollection *collection,
const QString &name = QString::null,
const QString &iconName = "midi",
bool setupPlaylist = true,
bool synchronizePlaying = false);
virtual ~DynamicPlaylist();
virtual bool canReload() const { return false; }
void setPlaylists(const PlaylistList &playlists);
public slots:
/**
* Reimplemented so that it will reload all of the playlists that are
* associated with the dynamic list.
*/
virtual void slotReload();
void slotSetDirty() { m_dirty = true; }
/**
* This is called when lowering the widget from the widget stack so that
* it can synchronize the playing item with the one that playlist it was
* create from.
*/
void lower(QWidget *top = 0);
protected:
/**
* Returns true if this list's items need to be updated the next time it's
* shown.
*/
bool dirty() const { return m_dirty; }
/**
* Return a list of the items in this playlist. For example in a search
* list this should return only the matched items. By default it returns
* all of the items in the playlists associated with this dynamic list.
*/
virtual PlaylistItemList items();
/**
* Reimplemented from QWidget. Here it updates the list of items (when
* appropriate) as the widget is shown.
*/
virtual void showEvent(QShowEvent *e);
virtual void paintEvent(QPaintEvent *e);
/**
* Updates the items (unconditionally). This should be reimplemented in
* subclasses to refresh the items in the dynamic list (i.e. running a
* search).
*/
virtual void updateItems();
bool synchronizePlaying() const;
private:
/**
* Checks to see if the current list of items is "dirty" and if so updates
* this dynamic playlist's items to be in sync with the lists that it is a
* wrapper around.
*/
void checkUpdateItems();
private slots:
void slotUpdateItems();
private:
QValueList<PlaylistObserver *> m_observers;
PlaylistItemList m_siblings;
PlaylistList m_playlists;
bool m_dirty;
bool m_synchronizePlaying;
};
#endif
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