qt5音乐播放器

#include "music.h" int Music::mode=0;//初始化静态变量，设置播放模式为0,0表示随机模式 Music::Music(QWidget *parent) : QWidget(parent) { init_window();//初始化界面 loadQss();//加载样式表 //关联播放 connect(player,&QMediaPlayer::durationChanged,this,&Music::showMessage); connect(player,&QMediaPlayer::metaDataAvailableChanged,this,&Music::showMessage); connect(musicSlider,&QSlider::sliderMoved,this,&Music::changMusicPostion);//拖动音乐播放进度条改变音乐播放的进度 connect(list,&QListWidget::itemDoubleClicked,this,&Music::removeMusicItem);//双击list列表中的选项则删除选项 } Music::~Music() { } //初始化界面，创建按钮 void Music::init_window() { this->setWindowFlags(Qt::FramelessWindowHint);//不带标题的窗口 this->resize(500,600); this->setWindowIcon(QIcon(":/image/log.ico")); showtitle=new QLabel("逍遥居音乐播放器",this); showtitle->setGeometry(10,10,200,40); showtitle->setFont(QFont("华文新魏",15,QFont::Bold)); volumed=50;//初始音量为50 BtnaddMusic=new QPushButton(this); BtnaddMusic->setGeometry(320,10,50,50); BtnaddMusic->setToolTip(tr("添加歌曲")); BtnaddMusic->setObjectName(tr("BtnaddMusic")); Btnmin=new QPushButton(this); Btnmin->setGeometry(380,10,50,50); Btnmin->setToolTip(tr("最小化窗口")); Btnmin->setObjectName(tr("Btnmin")); BtnClose=new QPushButton(this); BtnClose->setGeometry(440,10,50,50); BtnClose->setToolTip(tr("关闭窗口")); BtnClose->setCursor(Qt::PointingHandCursor); BtnClose->setObjectName(tr("BtnClose")); showCurrMusicName=new QLabel(this); showCurrMusicName->setText(""); showCurrMusicName->setGeometry(20,60,200,30); showCurrMusicTime=new QLabel(this); showCurrMusicTime->setText("00:00"); showCurrMusicTime->setGeometry(20,90,40,30); musicSlider=new QSlider(Qt::Horizontal,this); musicSlider->setGeometry(60,90,300,30); musicSlider->setValue(0); showCurrMusicNumTime=new QLabel(this); showCurrMusicNumTime->setGeometry(380,90,40,30); showCurrMusicNumTime->setText("00:00"); volumecontrol=new QSlider(Qt::Vertical,this); volumecontrol->setGeometry(440,70,40,100); volumecontrol->setValue(50); BtnMode=new QPushButton(this); BtnMode->setGeometry(60,180,50,50); BtnMode->setToolTip("随机播放"); BtnMode->setCursor(Qt::PointingHandCursor); BtnMode->setObjectName("BtnMode"); BtnPre=new QPushButton(this); BtnPre->setGeometry(200,180,50,50); BtnPre->setToolTip(tr("上一首")); BtnPre->setObjectName("BtnPre"); BtnPlaye=new QPushButton(this); BtnPlaye->setGeometry(270,180,50,50); BtnPlaye->setToolTip(tr("播放")); BtnPlaye->setObjectName("BtnPlaye"); BtnNext=new QPushButton(this); BtnNext->setGeometry(340,180,50,50); BtnNext->setToolTip(tr("下一首")); BtnNext->setObjectName("BtnNext"); list=new QListWidget(this); list->setGeometry(30,270,440,300); list ->setStyleSheet("background: rgba(0,0,0,0.1);"); list->setContextMenuPolicy(Qt::CustomContextMenu);//设置QListWidget支持右键菜单； add=false; player=new QMediaPlayer; player->setVolume(volumecontrol->value()); playlist=new QMediaPlaylist; //信号关联 connect(BtnClose,&QPushButton::clicked,this,&Music::close); connect(Btnmin,&QPushButton::clicked,this,&Music::showMinimized); connect(BtnaddMusic,&QPushButton::clicked,this,&Music::addmusic); connect(BtnPlaye,&QPushButton::clicked,this,&Music::playerMusic); connect(player,&QMediaPlayer::positionChanged,this,&Music::changMusicSliderPostion); connect(BtnPre,&QPushButton::clicked,this,&Music::premusic);//上一首 connect(BtnNext,&QPushButton::clicked,this,&Music::nextmusic);//下一首 connect(volumecontrol,&QSlider::sliderMoved,this,&Music::volumeChang);//音量精度条移动改变播放音乐音量 connect(BtnMode,&QPushButton::clicked,this,&Music::changMusicMode);//改变音乐模式 connect(list,&QListWidget::customContextMenuRequested,this,&Music::OnListContextMenu);//在qlistwidget控件上右击显示菜单 } //添加歌曲 void Music::addmusic() { QString songfileName,songName; QFileInfo info; QStringList filenames=QFileDialog::getOpenFileNames(this,"添加歌曲","","music(*.mp3)"); //判断列表是否为空 if(!filenames.isEmpty()) { add=true; } for(int i=0;i<filenames.size();i++) { playlist->addMedia(QUrl::fromLocalFile(filenames.at(i))); songfileName=filenames.at(i); info=QFileInfo(songfileName); songName=info.fileName(); list->addItem(songName); } playlist->setCurrentIndex(0); //判断播放列表的模式 if(mode==0) { //随机播放 playlist->setPlaybackMode(QMediaPlaylist::Random); } else if(mode==1) { //顺序播放, playlist->setPlaybackMode(QMediaPlaylist::Sequential); } else { //单曲循环 playlist->setPlaybackMode(QMediaPlaylist::CurrentItemInLoop); } //设置播放的列表 player->setPlaylist(playlist); } //显示音乐信息 void Music::showMusicinfo(QLabel*lable, qint64 postion) { postion/=1000; int h=postion/3600; int m=(postion-h*3600)/60; int s=postion-h*3600-m*60; QTime disytime(h,m,s); lable->setText(disytime.toString("mm:ss")); } //显示音乐信息重写方法 void Music::showMusicinfo(QLabel *lable, QString info) { lable->setText(info); } //拖动音乐播放进度条改变歌曲播放的进度 void Music::changMusicPostion(qint64 postion) { player->setPosition(postion*1000); showMusicinfo(showCurrMusicTime,postion); } //播放的时候改变播放进度条 void Music::changMusicSliderPostion(qint64 postion) { //设置播放进度条最大值 musicSlider->setMaximum(player->duration()/1000); musicSlider->setValue(postion/1000); //显示当前播放了多少秒 showMusicinfo(showCurrMusicTime,postion); } //显示当前播放的歌曲名和 void Music::showMessage(bool ok) { QString name; QString author; QString info; if(ok) { name=player->metaData(QMediaMetaData::Title).toString(); author=player->metaData(QMediaMetaData::Author).toString(); info=("正在播放 "+name+" _"+author); showMusicinfo(showCurrMusicName,info); showMusicinfo(showCurrMusicNumTime,player->duration()); } else { name=" "; author=" "; //如果为发false，则清空显示播放歌曲信息，总时长，当前时长 info=("暂未有播放的歌曲 "+name+" _"+author); showMusicinfo(showCurrMusicName,info); showMusicinfo(showCurrMusicNumTime,0); } } //播放音乐 void Music::playerMusic() { //音乐播放列表为空，提示先添加音乐 if(!add) { QMessageBox::information(this,"播放列表为空","请先添加要播放音乐文件"); addmusic(); } else { //判断播放按钮的状态，处于播放状态，则暂停播放 if(player->state()==QMediaPlayer::PlayingState) { player->pause();//暂停播放 //改变播放按钮的背景图片 BtnPlaye->setStyleSheet("QPushButton:!hover{border-image: url(:/image/pause.png);}" "QPushButton:hover{border-image: url(:/image/pause.png);}" "QPushButton:pressed{border-image: url(:/image/pause.png);}" ); } else { player->play();//播放 //改变播放按钮的背景图片 BtnPlaye->setStyleSheet("QPushButton:!hover{border-image: url(:/image/play.png);}" "QPushButton:hover{border-ima