QT +VS 自制小应用程序播放音频，更改win10桌面壁纸

Qt版本5.14.2 + VS2017
当前主要功能：播放音频，更改win10桌面壁纸

QT +VS 自制小应用程序播放音频，更改win10桌面壁纸

总结几个要点如下：

1 关于程序透明边框+背景图片背景的切换

	setWindowFlags(Qt::FramelessWindowHint);//无框setAttribute(Qt::WA_TranslucentBackground);//背景透明roletimer = new QTimer;//创建程序背景图片切换定时器roletimer->start(5000);connect(roletimer, &QTimer::timeout, this, &QTwallpaper::roleCut);//程序背景 默认看板娘ui.BGwidget->setStyleSheet(QString("background-image:url(:/image/res/appgirl/appgirl1.png);background-repeat:no-repeat;"));
---------------------------------------------//程序背景3张图片的定时切换
void QTwallpaper::roleCut()
{static int flag = 1;flag = flag % 3 + 1;ui.BGwidget->setStyleSheet(QString("background-image:url(:/image/res/appgirl/appgirl%1.png);background-repeat:no-repeat;").arg(flag));//%1 %2
}

2 由于背景透明，使用原鼠标事件已经不能准确移动

void QTwallpaper::mouseMoveEvent(QMouseEvent * ev)
{this->move(ev->globalPos() - moveLeftTop); //窗口的左上角坐标
}void QTwallpaper::mousePressEvent(QMouseEvent * ev)
{moveLeftTop = ev->pos(); //获取鼠标相当于窗口的坐标
}

3 设置桌面壁纸（目前只能是静态的）

//设置桌面壁纸
void setting::on_selectImg_Button_clicked()
{QString fileName = QFileDialog::getOpenFileName(this,tr("select Image"),"F:",tr("(*png *jpg)")//"(*gif);;"//"(*mp4 *mp3)"));this->srcPath = fileName;//壁纸注册表QSettings wallPaper("HKEY_CURRENT_USER\\Control Panel\\Desktop",QSettings::NativeFormat);//给壁纸注册表设置新的值（新的图片路径）if (this->srcPath != "") {wallPaper.setValue("Wallpaper", this->srcPath);QByteArray byte = this->srcPath.toLocal8Bit();//调用windowsAPISystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, byte.data(), SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);}
}

4 播放音频

#include <QtMultimedia/QMediaPlayer>[^1]	
-----------------------------------
//播放音频
void setting::setbkMusic()
{QString fileName = QFileDialog::getOpenFileName(this,tr("select Music"),"F:",tr("(*wav *mp3)"));this->srcPath = fileName;if (srcPath != " "){QMediaPlayer *player = new QMediaPlayer;player->setMedia(QUrl::fromLocalFile(this->srcPath));player->play();}
}

[^1]注：需要加这个库到你的项目里

项目源码无积分下载

QT +VS 自制小应用程序播放音频，更改win10桌面壁纸

Qt版本5.14.2 + VS2017
当前主要功能：播放音频，更改win10桌面壁纸

QT +VS 自制小应用程序播放音频，更改win10桌面壁纸

总结几个要点如下：

1 关于程序透明边框+背景图片背景的切换

	setWindowFlags(Qt::FramelessWindowHint);//无框setAttribute(Qt::WA_TranslucentBackground);//背景透明roletimer = new QTimer;//创建程序背景图片切换定时器roletimer->start(5000);connect(roletimer, &QTimer::timeout, this, &QTwallpaper::roleCut);//程序背景 默认看板娘ui.BGwidget->setStyleSheet(QString("background-image:url(:/image/res/appgirl/appgirl1.png);background-repeat:no-repeat;"));
---------------------------------------------//程序背景3张图片的定时切换
void QTwallpaper::roleCut()
{static int flag = 1;flag = flag % 3 + 1;ui.BGwidget->setStyleSheet(QString("background-image:url(:/image/res/appgirl/appgirl%1.png);background-repeat:no-repeat;").arg(flag));//%1 %2
}

2 由于背景透明，使用原鼠标事件已经不能准确移动

void QTwallpaper::mouseMoveEvent(QMouseEvent * ev)
{this->move(ev->globalPos() - moveLeftTop); //窗口的左上角坐标
}void QTwallpaper::mousePressEvent(QMouseEvent * ev)
{moveLeftTop = ev->pos(); //获取鼠标相当于窗口的坐标
}

3 设置桌面壁纸（目前只能是静态的）

//设置桌面壁纸
void setting::on_selectImg_Button_clicked()
{QString fileName = QFileDialog::getOpenFileName(this,tr("select Image"),"F:",tr("(*png *jpg)")//"(*gif);;"//"(*mp4 *mp3)"));this->srcPath = fileName;//壁纸注册表QSettings wallPaper("HKEY_CURRENT_USER\\Control Panel\\Desktop",QSettings::NativeFormat);//给壁纸注册表设置新的值（新的图片路径）if (this->srcPath != "") {wallPaper.setValue("Wallpaper", this->srcPath);QByteArray byte = this->srcPath.toLocal8Bit();//调用windowsAPISystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, byte.data(), SPIF_UPDATEINIFILE | SPIF_SENDWININICHANGE);}
}

4 播放音频

#include <QtMultimedia/QMediaPlayer>[^1]	
-----------------------------------
//播放音频
void setting::setbkMusic()
{QString fileName = QFileDialog::getOpenFileName(this,tr("select Music"),"F:",tr("(*wav *mp3)"));this->srcPath = fileName;if (srcPath != " "){QMediaPlayer *player = new QMediaPlayer;player->setMedia(QUrl::fromLocalFile(this->srcPath));player->play();}
}

[^1]注：需要加这个库到你的项目里

项目源码无积分下载