嵌入式实验(c++).zip

#include "music.h" int Music::z = 2;//静态变量控制播放方式 Music::Music(QWidget *parent) : QWidget(parent) { QPixmap backgroud; backgroud.load("/home/pi/CPP/exp_12/music/map.png"); this->resize(backgroud.width(), backgroud.height());//设置窗口和背景图片大小一致 this->setWindowFlags(Qt::FramelessWindowHint); add = false;//设置初始值 moved = 0; timer = new QTimer(this); timer2 = new QTimer(this); player = new QMediaPlayer(this); playList = new QMediaPlaylist(this); init_controls();//创建按钮 // init_skin();//外部加载 qss 文件，绘制界面样式 connect(player, SIGNAL(metaDataAvailableChanged(bool)), this,SLOT(showMessage(bool))); connect(seekSlider, SIGNAL(sliderMoved(int)), this,SLOT(seekChange(int))); } Music::~Music() { } void Music::addMoreMusic() { QString songFileName, songName; QFileInfo info; QStringList fileNames = QFileDialog::getOpenFileNames(this, tr("打开文件"), "", tr("music(*.mp3)")); if (!fileNames.isEmpty()) add = true; for (int i=0; i<fileNames.size(); i++) { playList->addMedia(QUrl::fromLocalFile(fileNames.at(i)));//将音乐文件逐一加入播放列表 songFileName = fileNames.at(i); info = QFileInfo(songFileName); songName = info.fileName(); list->addItem(songName); message->setText(tr("添加成功")); } playList->setCurrentIndex(0); if (z == 0) playList->setPlaybackMode(QMediaPlaylist::Random); else if (z == 1) playList->setPlaybackMode(QMediaPlaylist::CurrentItemInLoop); else playList->setPlaybackMode(QMediaPlaylist::Sequential); player->setPlaylist(playList); // BtnPlay->setStyleSheet("QPushButton:!hover{border-image:url(:/images/play_hover.png);}" // "\QPushButton:hover{border-image:url(:/images/play_hover.png);}" // "\QPushButton:pressed{border-image:url(:/images/play_press.png);}"); connect(timer2, SIGNAL(timeout()), this, SLOT(clearMessage()));//使用 clearMessage()函数来清除上面显示的“ 添加成功” timer2->start(2000); } void Music::playMusic() { if (!add) QMessageBox::information(this, "添加音乐", "请先添加音乐", "确定"); else { if (player->state() == QMediaPlayer::PlayingState)//判断是否为播放模式 { //设置播放模式为暂停 player->pause(); timer->stop(); //改变播放按钮的背景图片 // BtnPlay->setStyleSheet("QPushButton:!hover{border-image:url(:/images/play_hover.png);}" // "\QPushButton:hover{border-image:url(:/images/play_hover.png);}" // "\QPushButton:pressed{border-image:url(:/images/play_press.png);}"); } else { //否则设置播放模式 player->play(); connect(timer, SIGNAL(timeout()), this, SLOT(posChange())); timer->start(1000); // BtnPlay->setStyleSheet("QPushButton:!hover{border-image:url(:/images/pause_hover.png);}" // "\QPushButton:hover{border-image:url(:/images/pause_hover.png);}" // "\QPushButton:pressed{border-image:url(:/images/pause_press.png);}"); } } } void Music::preMusic() { //上一首，并更新播放时间为 0 moved = 0; playList->previous(); } void Music::nextMusic() { //下一首，更新播放时间为 0 moved = 0; playList->next(); } void Music::meteOpen() { static bool flag = true;//判断是否已点击 if (flag) { // muteButton->setStyleSheet("QPushButton:!hover{border-image:url(:/images/sound_close.png)}" // "\QPushButton:hover{border-image:url(:/images/sound_close.png)}" // "\QPushButton:pressed{border-image:url(:/images/sound_close.png)}" // "\QPushButton:focus{padding:-1;}"); muteButton->setToolTip(tr("打开声音")); player->setMuted(true); } else { // muteButton->setStyleSheet("QPushButton:!hover{border-image:url(:/images/sound.png)}" // "\QPushButton:hover{border-image:url(:/images/sound.png)}" // "\QPushButton:pressed{border-image:url(:/images/sound.png)}" // "\QPushButton:focus{padding:-1;}"); muteButton->setToolTip(tr("关闭声音")); player->setMuted(false); } flag = !flag; } void Music::volumChange(int vol) { player->setVolume(vol);//关联滑块的移动，设置播放的音量 } void Music::positionChange(qint64 position) { seekSlider->setMaximum(player->duration()/1000);//设置滑块的长度范围为音乐长.00 度 seekSlider->setValue(position/1000);//如果音乐进度改变，则滑块显示位置 moved = position; QTime moveTime(0,(moved/60000)%60, (moved/1000)%60);//设置时间 showPro->setText(moveTime.toString("mm:ss")); } void Music::showMessage(bool ok) { if (ok) { QString name = player->metaData(QMediaMetaData::Title).toString(); QString author = player->metaData(QMediaMetaData::Author).toString(); qDebug()<<"name:"<<name<<"\n"<<"author:"<<author; showMge->setText("正在播放： "+name+"-"+author); QTime displayTime(0,(player->duration()/60000)%60, (player->duration()/1000)%60); showTime->setText(displayTime.toString("mm:ss")); } } void Music::seekChange(int position)//滑动条快进、倒退音乐，且音乐已播放时长也跟着变化 { 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 showPro->setText(moveTime.toString("mm:ss")); } void Music::posChange() { if (moved >= player->duration()) moved = 0; } void Music::clearMessage() { message->setText(""); } void Music::musicPlayPattern() { if (z == 0) { // playPattern->setStyleSheet("QPushButton:!hover{border-image:url(:/images/Seq.png);}" // "\QPushButton:hover{border-image:url(:/images/Seq.png);}" // "\QPushButton:pressed{border-image:url(:/images/Seq.png);}"); playPattern->setToolTip(tr("列表循环")); playList->setPlaybackMode(QMediaPlaylist::Sequential); z = 2; } else if (z == 1) { // playPattern->setStyleSheet("QPushButton:!hover{border-image:url(:/images/Ran.png);}" // "\QPushButton:hover{border-image:url(:/images/Ran.png);}" // "\QPushButton:pressed{border-image:url(:/images/Ran.png);}"); playPattern->setToolTip(tr("随机播放")); playList->setPlaybackMode(QMediaPlaylist::Random); z--; } else { // playPattern->setStyleSheet("QPushButton:!hover{border-image:url(:/images/Single.png);}" // "\QPushButton:hover{border-image:url(:/images/Single.png);}" // "\QPushButton:pressed{border-image:url(:/images/Single.png);}"); playPattern->setToolTip(tr("单曲循环")); playList->setPlaybackMode(QMediaPlaylist::CurrentItemInLoop); z--; } } void Music::init_controls() { BtnClose = new QPushButton(this); BtnClose->setObjectName("BtnClose");//如果要对这个对象单独设stylesheet 的话一定要设置它的 objectname BtnClose->setGeometry(365, 2, 30, 30);//窗口左上角为原点（ X365，Y2），宽 30，高 30 BtnClose->setToolTip(tr("退出")); BtnClose->setCursor(QCursor(Qt::PointingHandCursor));//鼠标指针形状为手 BtnMin = new QPushButton(this); BtnMin->setObjectName(tr("BtnMin")); BtnMin->setGeometry(330,5,25,30); BtnMin->setToolTip(tr("最小化")); BtnMin->setCursor(QCursor(Qt::PointingHandCursor)); playPattern = ne