mainwindow.cpp代码如下：
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <QFile>
#include <QTextStream>
#include <QTextCodec>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
connect(ui->Buttonstart,&QPushButton::clicked,this,&MainWindow::slotButtonStart);
connect(ui->Buttonlast,&QPushButton::clicked,this,&MainWindow::slotButtonLast);
connect(ui->Buttonnext,&QPushButton::clicked,this,&MainWindow::slotButtonNext);
connect(ui->Buttonstart,&QPushButton::clicked,this,&MainWindow::changestartbutton);
connect(ui->Buttonvideo_wm,&QPushButton::clicked,this,&MainWindow::video_click_wm);
connect(ui->Buttonvideo_qr,&QPushButton::clicked,this,&MainWindow::video_click_qr);
connect(ui->Buttonvideo_cq,&QPushButton::clicked,this,&MainWindow::video_click_cq);
connect(ui->Buttonmute,&QPushButton::clicked,this,&MainWindow::mute);
connect(ui->fastButton,&QPushButton::clicked,this,&MainWindow::fastForward);
connect(ui->fastbackButton,&QPushButton::clicked,this,&MainWindow::fastBack);
init();
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::init(){
button_style();
PlayerList = new QMediaPlaylist; //实例化播放器和播放列表
Player = new QMediaPlayer;
fileList = getFileNames(this->MusicPath); //获取文件夹下所有音乐文件
lrcList = getLrcNames(this->LrcPath);
moved = 0;
qDebug()<<"ALL Music File n"<<fileList;
qDebug()<<"ALL Lrc File n"<<lrcList;
for(int i=0;i<fileList.size();i++){
QString fileName=fileList.at(i);
addItem(fileName);
PlayerList->addMedia(QUrl::fromLocalFile(MusicPath+""+fileName));
}
PlayerList->setCurrentIndex(0);
Player->setPlaylist(PlayerList); //将播放列表加载到播放器
connect(Player,&QMediaPlayer::currentMediaChanged,this,&MainWindow::slotShowCurrentMusic);
connect(Player,&QMediaPlayer::currentMediaChanged,this,&MainWindow::slotShowCurrentLrc);
connect(Player,&QMediaPlayer::currentMediaChanged,this,&MainWindow::cleanmap);
connect(ui->Buttonstart,&QPushButton::clicked,this,&MainWindow::slotShowCurrentLrc);
connect(ui->Buttonnext,&QPushButton::clicked,this,&MainWindow::slotShowCurrentLrc);
connect(ui->Buttonlast,&QPushButton::clicked,this,&MainWindow::slotShowCurrentLrc);
connect(ui->Buttonstart,&QPushButton::clicked,this,&MainWindow::slotShowCurrentMusic);
connect(ui->Volumebar, SIGNAL(sliderMoved(int)), this, SLOT(volumChange(int)));
connect(Player,SIGNAL(positionChanged(qint64)),this,SLOT(positionChange(qint64)));
connect(Player,SIGNAL(durationChanged(qint64)),this,SLOT(musicTime()));
connect(ui->Progressbar,SIGNAL(sliderMoved(int)),this,SLOT(seekChange(int)));
connect(ui->musicname,SIGNAL(cellDoubleClicked(int,int)),this,SLOT(playto(int,int)));
}
QStringList MainWindow::getFileNames(const QString &path)
{
QDir dir(path);
QStringList nameFilters;
nameFilters << "*.mp3";
QStringList files = dir.entryList(nameFilters, QDir::Files|QDir::Readable, QDir::Name);
return files;
}
QStringList MainWindow::getLrcNames(const QString &path)
{
QDir dir(path);
QStringList nameFilters;
nameFilters <<"*.txt";
QStringList files = dir.entryList(nameFilters, QDir::Files|QDir::Readable, QDir::Name);
return files;
}
void MainWindow::addItem(QString name){
int count = ui ->musicname->rowCount();
ui->musicname->setRowCount(count+1);
QTableWidgetItem *itemName = new QTableWidgetItem(name);
itemName->setFlags(itemName->flags() & ~Qt::ItemIsEditable);
ui->musicname->setItem(count,0,itemName);
}
void MainWindow::slotShowCurrentMusic(){
int index=PlayerList->currentIndex();
QString songName=fileList.at(index);
ui->CurrentMusic->setText(songName);
}
void MainWindow::slotShowCurrentLrc(){
int index=PlayerList->currentIndex();
qDebug()<<index;
QString musicLrc=lrcList.at(index);
qDebug()<<musicLrc;
initlrc(musicLrc);
}
void MainWindow::slotButtonStart(){
if(!isPlay){
isPlay=true;
Player->setVolume(100);
Player->play();
musicTime();
}
else{
isPlay=false;
Player->pause();
musicTime();
}
}
void MainWindow::slotButtonLast(){
int currentIndex = PlayerList->currentIndex();
if(currentIndex == 0){
currentIndex=PlayerList->mediaCount();
}
else{
PlayerList->previous();
PlayerList->previousIndex();
musicTime();
}
}
void MainWindow::slotButtonNext(){
int currentIndex = PlayerList->currentIndex();
if(++currentIndex == PlayerList->mediaCount()){
currentIndex=0;}
PlayerList->setCurrentIndex(currentIndex);
musicTime();
}
void MainWindow::volumChange(int vol)
{
Player -> setVolume(vol);
}
void MainWindow::positionChange(qint64 position)
{
ui->Progressbar->setMaximum(Player->duration() / 1000);//设置滑块的长度范围为音乐长.00度
ui->Progressbar->setValue(position / 1000);//如果音乐进度改变，则改变滑块显示位置
moved = position;//让播放时间等于音乐进度（毫秒）
QTime moveTime(0,(moved/60000) % 60,(moved / 1000) % 60);//设置时间
ui->showPro ->setText(moveTime.toString("mm:ss"));//显示时间
QString t=moveTime.toString("mm:ss");
QString mm = t.mid(0,2);
QString ss = t.mid(3, 2);
int m = mm.toInt();
int s = ss.toInt();
int time = m*60*1000 + s*1000;
showWord(time);
}
void MainWindow::seekChange(int position)
{
Player -> setPosition(position * 1000);//如果滑块改变位置，则改变音乐进度
moved = position * 1000;//让播放时间等于音乐进度（毫秒）
QTime moveTime(0,(moved/60000) % 60,(moved / 1000) % 60);//设置时间
ui->showPro ->setText(moveTime.toString("mm:ss"));//显示时间
}
void MainWindow::musicTime(){
qint64 time = Player->duration();
QTime Time(0,(time % (1000 * 60 * 60)) / (1000 * 60),(time % (1000 * 60)) / 1000);
ui->MusicTime->setText(Time.toString("mm:ss"));
qDebug()<<"time:"<<Time;
}
void MainWindow::showWord(int time)
{
if(map.contains(time))
{
ui->label1->setText(map.value(time));
}
else{
qDebug()<<"继续上一句歌词";
}
}
void MainWindow::getHeader(const char *str, QString &des)
{
des = des.remove(str);
des = des.remove("]");
}
void MainWindow::getTime(QString line)//获取lrc文件的每句的时间
{
if(line.startsWith("["))
{
int index = line.indexOf("]");
QString t = line.mid(1, index - 1);
QString mm = t.mid(0,2);
QString ss = t.mid(3, 2);
int m = mm.toInt();
int s = ss.toInt();
int time = m*60*1000 + s*1000;
t = line.mid(index + 1);
index = t.lastIndexOf("]");
if(index < 0)
{
map.insert(time, t);
}
else
{
t = t.mid(index + 1);
map.insert(time, t);
getTime(t);
qDebug()<<"time123:"<<time;
}
}
}
void MainWindow::initlrc(const QString& fileName)
{
QMap<int, QString> map;
QString l;
QFile file("C:Users44637MusicQTLrc"+fileName);
if(file.exists()){
qDebug()<<"文件存在";
}
else{
qDebug()<<"文件不存在";
}
if (!file.open(QIODevice::ReadOnly | QIODevice::Text)){
return;
}
QTextCodec *codec = QTextCodec::codecForName("GBK");
while(!file.atEnd())
{
QString line = codec->toUnicode(file.readLine());
QString s(line);
if(s.length()<4)
continue;
if(s.startsWith("[ti:"))
{
getHeader("[ti:", s);
map.insert(0, s);
ui->topmusicname->setText(s);
continue;
}
else if(s.startsWith("[ar:"))
{
getHeader("[ar:", s);
map.insert(1000, s);
ui->singer->setText("歌手："+s);
continue;
}
else if(s.startsWith("[al:"))
{
getHeader("[al:", s);
map.insert(2000, s);
ui->album->setText("专辑："+s);
continue;
}
else if(s.startsWith("[by:"))
{
getHeader("[by:", s);
map.insert(3000, s);
continue;
}
else
{
getTime(s);
}
}
file.close();
}
void MainWindow::button_style(){
ui->Buttonstart->setIcon(QIcon("E:QTQTcodeMusicPlayericonstart.jpg"));
ui->Buttonlast->setIcon(QIcon("E:QTQTcodeMusicPlayericonlast.jpg"));
ui->Buttonnext->setIcon(QIcon("E:QTQTcodeMusicPlayericonnext.png"));
ui->Buttonmute->setIcon(QIcon("E:QTQTcodeMusicPlayericonvolume.jpg"));
ui->Buttonvideo_qr->setIcon(QIcon("E:QTQTcodeMusicPlayericonMV.png"));
ui->Buttonvideo_wm->setIcon(QIcon("E:QTQTcodeMusicPlayericonMV.png"));
ui->Buttonvideo_cq->setIcon(QIcon("E:QTQTcodeMusicPlayericonMV.png"));
}
void MainWindow::changestartbutton(){
if(isPlay)
ui->Buttonstart->setIcon(QIcon("E:QTQTcodeMusicPlayericonpause.jpg"));
else
ui->Buttonstart->setIcon(QIcon("E:QTQTcodeMusicPlayericonstart.jpg"));
}
void MainWindow::cleanmap(){
map.clear();
}
void MainWindow::playto(int i,int )
{
PlayerList->setCurrentIndex(i);
isPlay=true;
changestartbutton();
QString musicLrc=lrcList.at(i);
initlrc(musicLrc);
Player->play();
}
void MainWindow::video_click_wm(){
v1= new VideoPlayer(this);
v1->setModal(false);
v1->show();
}
void MainWindow::video_click_qr(){
v_qr= new videoplayer_qr(this);
v_qr->setModal(false);
v_qr->show();
}
void MainWindow::video_click_cq(){
v_cq= new videoplayer_cq(this);
v_cq->setModal(false);
v_cq->show();
}
void MainWindow::mute(){
if(!ismute){
Player -> setVolume(0);
//ui->voiceslider->value();
ui->Buttonmute->setIcon(QIcon("E:QTQTcodeMusicPlayericonmute.png"));
ismute=true;
}
else{
Player -> setVolume(100);
ui->Buttonmute->setIcon(QIcon("E:QTQTcodeMusicPlayericonvolume.jpg"));
ismute=false;
}
}
void MainWindow::fastForward(){
qint64 position=Player->position();
qDebug()<<"position"<<position;
position=position+5000;
ui->Progressbar->setValue(position/1000);
Player -> setPosition(position);//如果滑块改变位置，则改变音乐进度
}
void MainWindow::fastBack(){
qint64 position=Player->position();
qDebug()<<"position"<<position;
position=position-5000;
ui->Progressbar->setValue(position/1000);
Player -> setPosition(position);//如果滑块改变位置，则改变音乐进度
}
