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#include "music.h"
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#include "ui_music.h"
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#include <QCoreApplication>
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#include <QFileInfoList>
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#include <QDir>
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#include <QMatrix>
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#include <QPixmap>
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#include <QTimer>
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music::music(QWidget *parent)
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: QMainWindow(parent)
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, ui(new Ui::music)
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{
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/* 布局初始化 */
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musicLayout();
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/* 媒体播放器初始化 */
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mediaPlayerInit();
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/* 扫描歌曲 */
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scanSongs();
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/* 按钮信号槽连接 */
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connect(ui->btn_previous, SIGNAL(clicked()),this, SLOT(btn_previous_clicked()));
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connect(ui->btn_play, SIGNAL(clicked()),this, SLOT(btn_play_clicked()));
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connect(ui->btn_next, SIGNAL(clicked()),this, SLOT(btn_next_clicked()));
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/* 列表信号槽连接 */
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connect(ui->listWidget, SIGNAL(itemClicked(QListWidgetItem*)),
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this, SLOT(listWidgetCliked(QListWidgetItem*)));//item 参数指的就是被用户点击的列表项
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/* 媒体信号槽连接 */
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connect(musicPlayer,
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SIGNAL(stateChanged(QMediaPlayer::State)),
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this,
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SLOT(mediaPlayerStateChanged(QMediaPlayer::State)));//播放的状态一旦改变
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connect(mediaPlaylist,
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SIGNAL(currentIndexChanged(int)),
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this,
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SLOT(mediaPlaylistCurrentIndexChanged(int)));//播放列表改变
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connect(musicPlayer, SIGNAL(durationChanged(qint64)),
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this,
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SLOT(musicPlayerDurationChanged(qint64)));//获取音乐的信息
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connect(musicPlayer,
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SIGNAL(positionChanged(qint64)),
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this,
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SLOT(mediaPlayerPositionChanged(qint64)));//获取音乐播放的进度
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/* slider信号槽连接 */
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connect(ui->durationSlider, SIGNAL(sliderReleased()),
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this, SLOT(durationSliderReleased()));//播放进度条滑动，修改音乐的进度
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connect(ui->Slider_volume, SIGNAL(sliderReleased()),
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this,
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SLOT(volume_change()));//调接音量
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ui->Slider_volume->hide();//初始化因此
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}
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music::~music()
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{
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delete ui;
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}
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void music::musicLayout()
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{
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ui->setupUi(this);
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}
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void music::scanSongs()
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{
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QDir dir(QCoreApplication::applicationDirPath()
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+ "/myMusic");
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QDir dirbsolutePath(dir.absolutePath());
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/* 如果目录存在 */
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if (dirbsolutePath.exists()) {
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/* 定义过滤器 */
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QStringList filter;
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/* 包含所有.mp3后缀的文件 */
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filter << "*.mp3";
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/* 获取该目录下的所有文件 */
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QFileInfoList files =
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dirbsolutePath.entryInfoList(filter, QDir::Files);
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/* 遍历 */
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for (int i = 0; i < files.count(); i++) {
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MediaObjectInfo info;
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/* 使用utf-8编码 */
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QString fileName = QString::fromUtf8(files.at(i)
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.fileName()
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.replace(".mp3", "")
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.toUtf8()
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.data());
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info.fileName = fileName + "\n"
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+ fileName.split("-").at(1);
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info.filePath = QString::fromUtf8(files.at(i)
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.filePath()
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.toUtf8()
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.data());
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/* 媒体列表添加歌曲 */
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if (mediaPlaylist->addMedia(QUrl::fromLocalFile(info.filePath)))
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{
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/* 添加到容器数组里储存 */
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mediaObjectInfo.append(info);
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/* 添加歌曲名字至列表 */
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ui->listWidget->addItem(info.fileName);
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qDebug()<<info.fileName;
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}
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else {
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qDebug()<<
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mediaPlaylist->errorString()
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.toUtf8().data()
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<< endl;
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qDebug()<< " Error number:"
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<< mediaPlaylist->error()
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<< endl;
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}
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}
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}
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}
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void music::btn_play_clicked()
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{
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int state = musicPlayer->state();//获取播放器的状态
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switch (state) {
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case QMediaPlayer::StoppedState:
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/* 媒体播放 */
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musicPlayer->play();
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break;
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case QMediaPlayer::PlayingState:
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/* 媒体暂停 */
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musicPlayer->pause();
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break;
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case QMediaPlayer::PausedState:
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musicPlayer->play();
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break;
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}
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}
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void music::btn_next_clicked()
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{
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musicPlayer->stop();
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int count = mediaPlaylist->mediaCount();
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if (0 == count)
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return;
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/* 列表下一个 */
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mediaPlaylist->next();
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musicPlayer->play();
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}
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void music::btn_previous_clicked()
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{
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musicPlayer->stop();
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int count = mediaPlaylist->mediaCount();
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if (0 == count)
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return;
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/* 列表上一个 */
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mediaPlaylist->previous();
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musicPlayer->play();
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}
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void music::listWidgetCliked(QListWidgetItem *item)
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{
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musicPlayer->stop();
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mediaPlaylist->setCurrentIndex(ui->listWidget->row(item));//获取行号
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musicPlayer->play();
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}
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void music::mediaPlayerStateChanged(QMediaPlayer::State state)
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{
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switch (state) {
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case QMediaPlayer::StoppedState:
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ui->btn_play->setChecked(false);
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break;
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case QMediaPlayer::PlayingState:
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ui->btn_play->setChecked(true);
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break;
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case QMediaPlayer::PausedState:
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ui->btn_play->setChecked(false);
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break;
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}
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}
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void music::mediaPlaylistCurrentIndexChanged(int index)
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{
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if (-1 == index)
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return;
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/* 设置列表正在播放的项 */
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ui->listWidget->setCurrentRow(index);//设置显示列表指向相应的行
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}
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void music::musicPlayerDurationChanged(qint64 duration)//duration 音乐的时间（wei秒为单位）
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{
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ui->durationSlider->setRange(0, duration / 1000);//设置范围
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int second = duration / 1000;
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int minute = second / 60;//分钟
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second %= 60;//秒
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QString mediaDuration;
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mediaDuration.clear();
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if (minute >= 10)
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mediaDuration = QString::number(minute, 10);//
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else
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mediaDuration = "0" + QString::number(minute, 10);
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if (second >= 10)
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mediaDuration = mediaDuration
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+ ":" + QString::number(second, 10);
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else
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mediaDuration = mediaDuration
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+ ":0" + QString::number(second, 10);
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/* 显示媒体总长度时间 */
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ui->label_time_out->setText(mediaDuration);
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}
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void music::mediaPlayerPositionChanged(qint64 position)//position音乐现在播放的时间
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{
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if (!ui->durationSlider->isSliderDown())//没桦到最后
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{
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ui->durationSlider->setValue(position/1000);
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}
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int second = position / 1000;
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int minute = second / 60;
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second %= 60;
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QString mediaPosition;
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mediaPosition.clear();
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if (minute >= 10)
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mediaPosition = QString::number(minute, 10);
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else
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mediaPosition = "0" + QString::number(minute, 10);
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if (second >= 10)
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mediaPosition = mediaPosition
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+ ":" + QString::number(second, 10);
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else
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mediaPosition = mediaPosition
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+ ":0" + QString::number(second, 10);
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/* 显示现在播放的时间 */
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ui->label_time_start->setText(mediaPosition);
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}
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void music::durationSliderReleased()
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{
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/* 设置媒体播放的位置 */
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musicPlayer->setPosition(ui->durationSlider->value() * 1000);
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qDebug()<<ui->durationSlider->value();
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}
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void music::mediaPlayerInit()
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{
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musicPlayer = new QMediaPlayer(this);
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mediaPlaylist = new QMediaPlaylist(this);
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/* 确保列表是空的 */
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mediaPlaylist->clear();
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/* 设置音乐播放器的列表为mediaPlaylist */
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musicPlayer->setPlaylist(mediaPlaylist);
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/* 设置播放模式，Loop是列循环 */
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mediaPlaylist->setPlaybackMode(QMediaPlaylist::Loop);
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musicPlayer->setVolume(20);
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}
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void music::on_btn_volume_toggled(bool checked)
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{
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if(checked==true)//按第二遍
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{
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qDebug()<<"released";
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ui->Slider_volume->hide();
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}
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else
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{
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qDebug()<<"released";
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ui->Slider_volume->show();
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}
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}
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void music::volume_change()
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{
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ui->Slider_volume->setRange(0, 150);//设置范围
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musicPlayer->setVolume(ui->Slider_volume->value());
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qDebug()<<"volume="<<ui->Slider_volume->value();
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}
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void music::image_rotate()
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{
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QMatrix matrix;
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matrix.rotate(music::angle);
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if( music::angle ==360)
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{
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music::angle = 0;
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}
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qDebug()<<"angle"<<music::angle;
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//设定图片的大小；
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QImage Image = QImage(":image/images/cd.png");
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QPixmap pixmap = QPixmap::fromImage(Image);
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QPixmap fixpixmap = pixmap.scaled(300,300,Qt::IgnoreAspectRatio
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,Qt::SmoothTransformation);
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ui->label->setPixmap((fixpixmap)
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.transformed(matrix,Qt::SmoothTransformation));
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ui->label->setAlignment(Qt::AlignCenter);
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}
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