/usr/include/qmmpui/playlistmodel.h is in libqmmpui-dev 0.7.4-1.
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* Copyright (C) 2006-2012 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* 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. *
* *
* This program 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 General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef PLAYLISTMODEL_H
#define PLAYLISTMODEL_H
#include <QObject>
#include <QString>
#include <QStringList>
#include <QMap>
#include <QQueue>
#include <QPointer>
#include <QVector>
#include "playlistitem.h"
class FileLoader;
class PlayListItem;
class PlayState;
class PlayListFormat;
class PlayListModel;
/*! @brief Helper class that keeps track of a view's selected items.
*
* @author Vladimir Kuznetsov <vovanec@gmail.com>
*/
struct SimpleSelection
{
/*!
* Constructs an empty selection model.
*/
SimpleSelection()
{
;
}
/*!
* Returns \p true if this selection is valid; otherwise returns returns \p false.
*/
inline bool isValid()const
{
return (m_bottom != -1) && (m_anchor != -1) && (m_top != -1);
}
/*!
* Prints object state.
*/
inline void dump()const
{
qWarning("top: %d\tbotom: %d\tanchor: %d", m_top, m_bottom, m_anchor);
}
/*!
* Returns number of selected items.
*/
inline int count()const
{
return m_bottom - m_top + 1;
}
int m_bottom; /*!< Bottom of the selection */
int m_top; /*!< Top of the selection */
int m_anchor; /*!< Main index of the selection */
QList<int> m_selected_indexes; /*!< Selected items numbers */
};
/*! @internal
* @brief Helper class used for tags update after details dialog closing.
*
* @author Vladimir Kuznetsov <vovanec@gmail.com>
*/
class TagUpdater : public QObject
{
Q_OBJECT
QObject* m_observable;
PlayListItem* m_item;
public:
TagUpdater(QObject* o, PlayListItem* item);
protected slots:
void updateTag();
};
/*! @brief The PlayListModel class provides a data model for the playlist.
*
* @author Vladimir Kuznetsov <vovanec@gmail.com>
* @author Ilya Kotov <forkotov02@hotmail.ru>
*/
class PlayListModel : public QObject
{
Q_OBJECT
public:
/*!
* Constructs a playlist model.
* @param name Playlist name.
* @param parent QObject parent
*/
PlayListModel(const QString &name, QObject *parent = 0);
/*!
* Object destructor.
*/
~PlayListModel();
/*!
* Returns playlist name.
*/
QString name() const;
/*!
* Sets the name of the playlist to \b name.
*/
void setName(const QString &name);
/*!
* Returns number of items.
*/
int count();
/*!
* Returns the current item.
*/
PlayListItem* currentItem();
/*!
* Returns the next playing item or 0 if next item is unknown.
*/
PlayListItem* nextItem();
/*!
* Returns the row of the \b item
*/
int indexOf(PlayListItem* item) const;
/*!
* Returns the item with the index \b index or 0 if item doesn't exist.
*/
PlayListItem* item(int index) const;
/*!
* Returns index of the current item.
*/
int currentIndex();
/*!
* Sets current index.
* Returns \b false if item with this index doesn't exist, otherwise returns \b true
* @param index Number of item.
*/
bool setCurrent (int index);
/*!
* Sets current item to \b item.
* Returns \b true if success, otherwise returns \b false
*/
bool setCurrent(PlayListItem *item);
/*!
* Returns \b true if item with \b index is selected, otherwise returns \b false
*/
bool isSelected(int index);
/*!
* Sets the selected state of the item to \b select
* @param index Number of item.
* @param selected Selection state (\b true - select, \b false - unselect)
*/
void setSelected(int index, bool selected = true);
/*!
* Advances to the next item. Returns \b false if next iten doesn't exist,
* otherwise returns \b true
*/
bool next();
/*!
* Goes back to the previous item. Returns \b false if previous iten doesn't exist,
* otherwise returns \b true
*/
bool previous();
/*!
* Returns a list of the formated titles.
* @param first First item.
* @param count A number of items.
*/
QStringList getTitles(int first, int count);
/*!
* Returns a list of the formatted durations.
* @param first First item.
* @param last A number of items.
*/
QStringList getTimes(int first, int count);
/*!
* Moves the item at index position \b from to index position \b to.
*/
void moveItems(int from, int to);
/*!
* Returns \b true if \b f file is in play queue, otherwise returns \b false.
*/
bool isQueued(PlayListItem* item) const;
/*!
* Sets current song to the file that is nex in queue, if queue is empty - does nothing
*/
void setCurrentToQueued();
/*!
* Returns \b true if play queue is empty,otherwise returns - \b false.
*/
bool isEmptyQueue()const;
/*!
* Returns index of \b f file in queue.e
*/
int queuedIndex(PlayListItem* item) const;
/*!
* Returns the number of items in the queue
*/
int queueSize() const;
/*!
* Returns \b true if playback stops after \b item, otherwise returns \b false.
*/
bool isStopAfter(PlayListItem* item) const;
/*!
* Returns current selection(playlist can contain a lot of selections,
* this method returns selection which \b row belongs to)
*/
const SimpleSelection& getSelection(int row);
/*!
* Returns list with selected items indexes.
*/
QList<int> selectedIndexes() const;
/*!
* Returns list of \b PlayListItem pointers that are selected.
*/
QList<PlayListItem*> selectedItems() const;
/*!
* Returns list of all \b PlayListItem pointers.
*/
QList<PlayListItem*> items() const
{
return m_items;
}
/*!
* Returns number of first item that selected upper the \b row item.
*/
int firstSelectedUpper(int row);
/*!
* Returns number of first item that selected lower the \b row item.
*/
int firstSelectedLower(int row);
/*!
* Returns total lenght in seconds of all songs.
*/
int totalLength()const
{
return m_total_length;
}
/*!
* Loads playlist with \b f_name name.
*/
void loadPlaylist(const QString& f_name);
/*!
* Saves current songs to the playlist with \b f_name name.
*/
void savePlaylist(const QString& f_name);
/*!
* Returns state of "Repeat All" option.
*/
bool isRepeatableList() const;
/*!
* Returns state of "Shuffle" option.
*/
bool isShuffle() const;
/*!
* Returns \b true if the file loader thread is active; otherwise returns \b false.
*/
bool isLoaderRunning() const;
/*!
* Returns \b true if the playlist contains an item with URL \b url; otherwise returns \b false.
*/
bool contains(const QString &url);
/*!
* Enum of available sort modes
*/
enum SortMode
{
TITLE, /*!< by title */
ALBUM, /*!< by album */
DISCNUMBER, /*!< by discnumber */
ARTIST, /*!< by artist */
FILENAME, /*!< by file name */
PATH_AND_FILENAME, /*!< by path and file name */
DATE, /*!< by date */
TRACK, /*!< by track */
FILE_CREATION_DATE, /*!< by file creation date */
FILE_MODIFICATION_DATE /*!< by file modification date */
};
signals:
/*!
* Emitted when the state of PlayListModel has changed.
*/
void listChanged();
/*!
* Emitted when current item has changed.
*/
void currentChanged();
/*!
* Emitted when new item has added.
* @param item New playlist item pointer.
*/
void itemAdded(PlayListItem *item);
/*!
* Emitted when playlist name has chanded.
* @param name New playlist name.
*/
void nameChanged(const QString& name);
/*!
* Emitted when playlist loader thread has finished.
*/
void loaderFinished();
/*!
* Emitted when playlist items are added or removed.
*/
void countChanged();
public slots:
/*!
* Adds \b item to the playlist.
*/
void add(PlayListItem *item);
/*!
* Adds a list of items to the playlist.
* @param items List of items.
*/
void add(QList <PlayListItem *> items);
/*!
* Adds a list of files and directories to the playlist
* @param path Full path of file or directory.
*/
void add(const QString &path);
/*!
* Adds a list of files and directories to the playlist
* @param paths Full paths of files and directories.
*/
void add(const QStringList &paths);
/*!
* Removes all items.
*/
void clear();
/*!
* Clears selection.
*/
void clearSelection();
/*!
* Removes selected items.
*/
void removeSelected();
/*!
* Removes unselected items.
*/
void removeUnselected();
/*!
* Removes items with \b i index.
*/
void removeAt (int i);
/*!
* Removes item \b item from playlist
*/
void removeItem (PlayListItem *item);
/*!
* Inverts selection (selects unselected items and unselects selected items)
*/
void invertSelection();
/*!
* Selects all items.
*/
void selectAll();
/*!
* Shows details for the first selected item.
* @param parent parent Widget.
*/
void showDetails(QWidget *parent = 0);
/*!
* Emits update signals manually.
*/
void doCurrentVisibleRequest();
/*!
* Randomly changes items order.
*/
void randomizeList();
/*!
* Reverces items order.
*/
void reverseList();
/*!
* Prepares model for shuffle playing. \b yes parameter is \b true - model iterates in shuffle mode.
*/
void prepareForShufflePlaying(bool yes);
/*!
* Prepares model for shuffle playing. \b yes parameter is true - model iterates in repeat mode.
*/
void prepareForRepeatablePlaying(bool);
/*!
* Sorts selected items in \b mode sort mode.
*/
void sortSelection(int mode);
/*!
* Sorts items in \b mode sort mode.
*/
void sort(int mode);
/*!
* Adds/removes selected items to/from playback queue.
*/
void addToQueue();
/*!
* Adds/removes item \b f to/from playback queue.
*/
void setQueued(PlayListItem* item);
/*!
* Removes invalid items from playlist
*/
void removeInvalidItems();
/*!
* Removes duplicate items by URL.
*/
void removeDuplicates();
/*!
* Removes all items from queue.
*/
void clearQueue();
/*!
* Toggles 'stop after selected' feature.
*/
void stopAfterSelected();
private:
/*!
* This internal method performs sorting of \b list_to_sort list of items.
*/
void doSort(int mode,QList<PlayListItem*>& list_to_sort);
/*!
* Returns topmost row in current selection
*/
int topmostInSelection(int);
/*!
* Returns bottommost row in current selection
*/
int bottommostInSelection(int);
/*!
* Removes items from model. If \b inverted is \b false -
* selected items will be removed, else - unselected.
*/
void removeSelection(bool inverted = false);
private slots:
void preparePlayState();
private:
QList <PlayListItem*> m_items;
QList <PlayListItem*> m_editing_items;
PlayListItem* m_currentItem;
PlayListItem* m_stop_item;
int m_current;
SimpleSelection m_selection; /*!< This flyweight object represents current selection. */
QQueue <PlayListItem*> m_queued_songs; /*!< Songs in play queue. */
bool m_is_repeatable_list; /*!< Is playlist repeatable? */
PlayState* m_play_state; /*!< Current playing state (Normal or Shuffle) */
int m_total_length;
FileLoader *m_loader;
bool m_shuffle;
QString m_name;
};
#endif
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