/* * To change this template, choose Tools | Templates * and open the template in the editor. */ package com.hadeslee.yoyoplayer.playlist; import java.io.Serializable; import java.util.Vector; /** * * @author hadeslee */ /** * 一个播放列表的接口,实现者必须所有方法的实现 * 这些方法都是可以被PlayListUI来调用的,以保证 * 视图和模型层的分离 */ public interface PlayList extends Serializable { /** * Loads playlist. */ public boolean load(String filename); /** * Saves playlist. */ public boolean save(String filename); /** * Adds item at a given position in the playlist. */ public void addItemAt(PlayListItem pli, int pos); /** * Searchs and removes item from the playlist. */ public void removeItem(PlayListItem pli); /** * Removes item at a given position from the playlist. */ public void removeItemAt(int pos); /** * Removes all items in the playlist. */ public void removeAllItems(); /** * Append item at the end of the playlist. */ public void appendItem(PlayListItem pli); /** * Sorts items of the playlist. */ public void sortItems(int sortmode); /** * Returns item at a given position from the playlist. */ public PlayListItem getItemAt(int pos); /** * Returns a collection of playlist items. */ public Vector getAllItems(); /** * Returns then number of items in the playlist. */ public int getPlaylistSize(); // Next methods will be used by the Player /** * Randomly re-arranges the playlist. */ public void shuffle(); /** * Returns item matching to the cursor. */ public PlayListItem getCursor(); /** * Moves the cursor at the begining of the Playlist. */ public void begin(); /** * Returns item matching to the cursor. */ public int getSelectedIndex(); /** * Returns index of playlist item. */ public int getIndex(PlayListItem pli); /** * Computes cursor position (next). */ public void nextCursor(); /** * Computes cursor position (previous). */ public void previousCursor(); /** * Set the modification flag for the playlist */ boolean setModified(boolean set); /** * Checks the modification flag */ public boolean isModified(); /** * 设置当前正在播放的位置 * @param index 位置 */ public void setCursor(int index); /** * 设置这个播放列表的名字 * @param name 名字 */ public void setName(String name); /** * 得到这个播放列表的名字 * @return */ public String getName(); /** * 设置某个选项为选中 * @param pl */ public void setItemSelected(PlayListItem pl,int index); }
