Qt制作的一个简单的音乐播放器

#include "musicwidget.h" #include <QLayout> #include <QMessageBox> #include <stdlib.h> #include <time.h> MusicWidget::MusicWidget(QWidget *parent) : QWidget(parent) { index = 0; qsrand((unsigned)time(NULL)); QPalette palette; QPalette labelPalette; QPalette buttonPalette; labelPalette.setColor(QPalette::WindowText, QColor(255, 255, 255)); buttonPalette.setColor(QPalette::ButtonText, QColor(255, 255, 255)); stop = new QPushButton(tr("stop")); stop->setAutoFillBackground(true); palette.setColor(QPalette::Button, QColor(128, 255, 0)); stop->setPalette(palette); stop->setPalette(buttonPalette); stop->setFlat(true); pause = new QPushButton(tr("pause")); pause->setAutoFillBackground(true); palette.setColor(QPalette::Button, QColor(128, 255, 0)); pause->setPalette(palette); pause->setPalette(buttonPalette); pause->setFlat(true); play = new QPushButton(tr("play")); play->setAutoFillBackground(true); palette.setColor(QPalette::Button, QColor(128, 255, 0)); play->setPalette(palette); play->setPalette(buttonPalette); play->setFlat(true); next = new QPushButton(tr("next")); next->setAutoFillBackground(true); palette.setColor(QPalette::Button, QColor(128, 255, 0)); next->setPalette(palette); next->setPalette(buttonPalette); next->setFlat(true); last = new QPushButton(tr("last")); last->setAutoFillBackground(true); palette.setColor(QPalette::Button, QColor(128, 255, 0)); last->setPalette(palette); last->setPalette(buttonPalette); last->setFlat(true); volumeLabel = new QLabel; volumeLabel->setText("Volume: "); volumeLabel->setPalette(labelPalette); timeLabel = new QLabel; timeLabel->setText("Time: "); timeLabel->setPalette(labelPalette); showTime = new QLabel; showTime->setText("00:00/00:00"); showTime->setPalette(labelPalette); currentMusic = new QLabel; currentMusic->setPalette(labelPalette); currentMusic->setText("Name: "); audioOutput = new Phonon::AudioOutput(Phonon::MusicCategory); player = new Phonon::MediaObject; seekSlider = new Phonon::SeekSlider; volumeSlider = new Phonon::VolumeSlider; Phonon::createPath(player, audioOutput); seekSlider->setMediaObject(player); volumeSlider->setAudioOutput(audioOutput); playList = new PlayList; playMode = new PlayMode; mode = PlayMode::Sequence; connect(play, SIGNAL(clicked()), player, SLOT(play())); connect(stop, SIGNAL(clicked()), player, SLOT(stop())); connect(pause, SIGNAL(clicked()), player, SLOT(pause())); connect(player, SIGNAL( tick(qint64)), this, SLOT(changeText(qint64))); connect(next, SIGNAL(clicked()), this, SLOT(nextMusic())); connect(last, SIGNAL(clicked()), this, SLOT(lastMusic())); connect(playList, SIGNAL(itemDoubleClicked(QTableWidgetItem*)), this, SLOT(selectMusic(QTableWidgetItem*))); connect(playMode, SIGNAL(activated(int)), this, SLOT(changeMode(int))); QHBoxLayout *layout = new QHBoxLayout; layout->addWidget(stop); layout->addWidget(pause); layout->addWidget(last); layout->addWidget(play); layout->addWidget(next); QHBoxLayout *layoutTime = new QHBoxLayout; layoutTime->addWidget(timeLabel); layoutTime->addWidget(showTime); layoutTime->addWidget(seekSlider); QHBoxLayout *layoutVolume = new QHBoxLayout; layoutVolume->addWidget(volumeLabel); layoutVolume->addWidget(volumeSlider); QHBoxLayout *layoutPlayList = new QHBoxLayout; layoutPlayList->addWidget(playList); QHBoxLayout *layoutMusic = new QHBoxLayout; layoutMusic->addWidget(currentMusic); layoutMusic->addWidget(playMode); QVBoxLayout *mLayout = new QVBoxLayout; mLayout->addLayout(layoutMusic); mLayout->addLayout(layoutTime); mLayout->addLayout(layoutVolume); mLayout->addLayout(layout); mLayout->addLayout(layoutPlayList); setLayout(mLayout); setAutoFillBackground(true); //palette.setBrush(QPalette::Background, QBrush(QPixmap(":/23.png"))); palette.setColor(QPalette::Background, QColor(255, 128, 255)); setPalette(palette); } void MusicWidget::changeText(qint64 t) { __int64 minutie = t / 60000; __int64 second = t / 1000 - minutie * 60; QTime nowTime(0, minutie, second); showTime->setText(nowTime.toString("mm:ss") + "/" + totlaTime->toString("mm:ss")); if(t == player->totalTime()) { switch(mode) { case PlayMode::Sequence: nextMusic(); break; case PlayMode::Circular: { if(index + 1 == vector.size()) { index = 0; } playMusic(index); break; } case PlayMode::Random: { int temp = qrand() % vector.size(); while(temp == index) { temp = qrand() % vector.size(); } index = temp; playMusic(temp); break; } case PlayMode::SingleCircular: { playMusic(index); break; } case PlayMode::SinglePlay: { break; } } } } void MusicWidget::setFileList(QStringList &list) { int i; int currentSize = vector.size(); int nowSize; QStringList fileList = list; QList<QString>::Iterator iterator = fileList.begin(); for(; iterator != fileList.end(); ++iterator) { vector.push_back(*iterator); } nowSize = vector.size(); playList->setRows(nowSize - currentSize); for(i = currentSize; i < nowSize; ++i) { QStringList string = vector[i].split("\\"); playList->setInformation(string[string.length() - 1], i); //QMessageBox::information(NULL, tr("test"), time); } } void MusicWidget::nextMusic() { if(mode != PlayMode::Random) { if(index + 1 < vector.size() && index + 1 >= 0) { playMusic(++index); } else if(index + 1 == vector.size()) { if(mode != PlayMode::Sequence) { index = 0; playMusic(index); } } } else { int temp = qrand() % vector.size(); while(temp == index) { temp = qrand() % vector.size(); } index = temp; playMusic(temp); } } void MusicWidget::lastMusic() { if(mode != PlayMode::Random) { if(index - 1 >= 0 && index - 1 < vector.size()) { playMusic(--index); } else if(index - 1 < 0) { index = 0; playMusic(index); } } else { int temp = qrand() % vector.size(); while(temp == index) { temp = qrand() % vector.size(); } index = temp; playMusic(temp); } } void MusicWidget::playMusic(int i) { player->stop(); QStringList temp = vector[i].split("\\"); currentMusic->setText("Name : " + temp[temp.length() - 1]); player->setCurrentSource(Phonon::MediaSource(vector[i])); qint64 minutie = player->totalTime() / 60000; qint64 second = player->totalTime() / 1000 - minutie * 60; totlaTime = new QTime(0, minutie, second); changeText((qint64)0); player->play(); } void MusicWidget::selectMusic(QTableWidgetItem *item) { index = item->row(); playMusic(index); } void MusicWidget::changeMode(int step) { switch(step) { case 0: mode = PlayMode::Sequence; break; case 1: mode = PlayMode::Circular; break; case 2: mode = PlayMode::Random; break; case 3: mode = PlayMode::Singl