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115 lines
3.3 KiB
C++
115 lines
3.3 KiB
C++
/**
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* Copyright (C) 2003-2004 Scott Wheeler <wheeler@kde.org>
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DYNAMICPLAYLIST_H
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#define DYNAMICPLAYLIST_H
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#include "playlist.h"
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#include <QList>
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/**
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* A Playlist that is a union of other playlists that is created dynamically.
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*/
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class DynamicPlaylist : public Playlist
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{
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Q_OBJECT
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public:
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/**
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* Creates a dynamic playlist based on lists.
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*/
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DynamicPlaylist(const PlaylistList &lists,
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PlaylistCollection *collection,
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const QString &name = QString(),
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const QString &iconName = "audio-midi",
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bool setupPlaylist = true,
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bool synchronizePlaying = false);
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virtual ~DynamicPlaylist();
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virtual bool canReload() const { return false; }
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void setPlaylists(const PlaylistList &playlists);
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public slots:
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/**
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* Reimplemented so that it will reload all of the playlists that are
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* associated with the dynamic list.
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*/
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virtual void slotReload();
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void slotSetDirty() { m_dirty = true; }
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/**
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* This is called when lowering the widget from the widget stack so that
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* it can synchronize the playing item with the one that playlist it was
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* create from.
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*/
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void lower(QWidget *top = 0);
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protected:
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/**
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* Returns true if this list's items need to be updated the next time it's
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* shown.
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*/
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bool dirty() const { return m_dirty; }
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/**
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* Return a list of the items in this playlist. For example in a search
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* list this should return only the matched items. By default it returns
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* all of the items in the playlists associated with this dynamic list.
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*/
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virtual PlaylistItemList items();
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/**
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* Reimplemented from QWidget. Here it updates the list of items (when
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* appropriate) as the widget is shown.
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*/
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virtual void showEvent(QShowEvent *e);
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virtual void paintEvent(QPaintEvent *e);
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/**
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* Updates the items (unconditionally). This should be reimplemented in
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* subclasses to refresh the items in the dynamic list (i.e. running a
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* search).
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*/
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virtual void updateItems();
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bool synchronizePlaying() const;
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private:
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/**
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* Checks to see if the current list of items is "dirty" and if so updates
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* this dynamic playlist's items to be in sync with the lists that it is a
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* wrapper around.
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*/
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void checkUpdateItems();
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private slots:
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void slotUpdateItems();
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private:
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QList<PlaylistObserver *> m_observers;
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PlaylistItemList m_siblings;
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PlaylistList m_playlists;
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bool m_dirty;
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bool m_synchronizePlaying;
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};
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#endif
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// vim: set et sw=4 tw=0 sta:
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