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nowplaying.h 4 KB
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/***************************************************************************
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    begin                : Tue Nov 9 2004
    copyright            : (C) 2004 by Scott Wheeler
    email                : wheeler@kde.org
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 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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 NOWPLAYING_H
#define NOWPLAYING_H

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#include <kactivelabel.h>
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#include <qhbox.h>
#include <qlabel.h>
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#include <qguardedptr.h>
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#include "filehandle.h"
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#include "playlist.h"
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class NowPlayingItem;
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class PlaylistCollection;
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class Playlist;
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/**
 * This is the widget that holds all of the other items and handles updating them
 * when the playing item changes.
 */

class NowPlaying : public QHBox
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{
    Q_OBJECT

public:
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    NowPlaying(QWidget *parent, PlaylistCollection *collection,
               const char *name = 0);
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    void addItem(NowPlayingItem *item);
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    PlaylistCollection *collection() const;
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private slots:
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    void slotUpdate();
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private:
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    struct Observer : public PlaylistObserver
    {
        Observer(NowPlaying *parent, PlaylistInterface *playlist) :
            PlaylistObserver(playlist),
            m_parent(parent) {}
        virtual void updateCurrent() {}
        virtual void updateData() { m_parent->slotUpdate(); }
        NowPlaying *m_parent;
    };

    Observer m_observer;
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    PlaylistCollection *m_collection;
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    QValueList<NowPlayingItem *> m_items;
};
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/**
 * Abstract base for the other NowPlaying items.
 */
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class NowPlayingItem
{
public:
    virtual void update(const FileHandle &file) = 0;
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    NowPlaying *parent() const { return m_parent; }
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protected:
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    NowPlayingItem(NowPlaying *parent) : m_parent(parent) { parent->addItem(this); }
private:
    NowPlaying *m_parent;
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};

/**
 * Displays the cover of the currently playing file if available, or hides
 * itself if not.
 */

class CoverItem : public QLabel, public NowPlayingItem
{
public:
    CoverItem(NowPlaying *parent);
    virtual void update(const FileHandle &file);
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    virtual void mouseReleaseEvent(QMouseEvent *event);
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protected:
    virtual void dragEnterEvent(QDragEnterEvent *e);
    virtual void dropEvent(QDropEvent *e);

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private:
    FileHandle m_file;
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};

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/**
 * A link label that doesn't automatically open Konqueror.
 */

class LinkLabel : public KActiveLabel
{
public:
    LinkLabel(QWidget *parent, const char *name = 0) : KActiveLabel(parent, name) {}
    virtual void openLink(const QString &) {}
};

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/**
 * Show the text information on the current track and provides links to the
 * album and artist of the currently playing item.
 */

class TrackItem : public QWidget, public NowPlayingItem
{
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    Q_OBJECT

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public:
    TrackItem(NowPlaying *parent);
    virtual void update(const FileHandle &file);

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private slots:
    void slotOpenLink(const QString &link);
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    void slotUpdate();
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private:
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    FileHandle m_file;
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    LinkLabel *m_label;
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};

/**
 * Shows up to 10 items of history and links to those items.
 */

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class HistoryItem : public LinkLabel, public NowPlayingItem
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{
public:
    HistoryItem(NowPlaying *parent);
    virtual void update(const FileHandle &file);
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    virtual void openLink(const QString &link);
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private:
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    struct Item
    {
        Item() {}
        Item(const QString &a, const FileHandle &f, Playlist *p)
            : anchor(a), file(f), playlist(p) {}

        QString anchor;
        FileHandle file;
        QGuardedPtr<Playlist> playlist;
    };

    QValueList<Item> m_history;
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    LinkLabel *m_label;
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};

#endif