简单实现闹钟播报，设置时间，当系统时间与设置时间相同时播报语音5次，然后停止。如果设置时间小于当前系统时间，则弹出消息提示框，并清空输入框。

#include "my_clock.h"
#include "ui_my_clock.h"
#include "aerowidget.h"

my_clock::my_clock(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::my_clock)
{
    ui->setupUi(this);
    this->setAttribute(Qt::WA_TranslucentBackground);

    ui->time_screen->setAlignment(Qt::AlignCenter);
    setWindowFlags(Qt::FramelessWindowHint);
//    setWindowFlags(Qt::Tool | Qt::FramelessWindowHint |Qt::X11BypassWindowManagerHint); // 设置窗口标志为Qt::Tool、Qt::FramelessWindowHint和Qt::WindowMinimizeButtonHint
    // 设置鼠标追踪
    setMouseTracking(true);

    timer_id = startTimer(100);
}

my_clock::~my_clock()
{
    delete ui;
}

// 重写鼠标按下事件
void my_clock::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::LeftButton) {
        // 保存鼠标按下时的位置和窗口位置
        m_dragPos = event->globalPos() - frameGeometry().topLeft();
        event->accept();
    }
}

// 重写鼠标移动事件
void my_clock::mouseMoveEvent(QMouseEvent *event)
{
    if (event->buttons() & Qt::LeftButton) {
        // 移动窗口到鼠标位置
        move(event->globalPos() - m_dragPos);
        event->accept();
    }
}

void my_clock::timerEvent(QTimerEvent *e)
{
    QDateTime dateTime = QDateTime::currentDateTime();
    if(e->timerId() == timer_id)
    {
        ui->time_screen->setText(dateTime.toString("hh:mm:ss"));
    //    ui->time_screen->setText(dateTime.toString("yyyy/MM/dd - hh:mm:ss"));
    }
    else if (e->timerId() == timer_id_btn)
    {

    }
}

void my_clock::on_pushButton_3_clicked()
{
    close();
}

void my_clock::on_pushButton_4_clicked()
{
//    showMinimized();
    Qt::WindowFlags flags = windowFlags();
    if (flags & Qt::WindowStaysOnTopHint)
        flags &= ~Qt::WindowStaysOnTopHint;
    else
        flags |= Qt::WindowStaysOnTopHint;
    setWindowFlags(flags);
    show(); // Ensure the window is shown after changing flags
}

void my_clock::on_pushButton_5_clicked()
{
    if(ui->pushButton_5->text() == "启动")
    {
        timer_id_btn = startTimer(1000);
        ui->pushButton_5->setText("关闭");
    }
    else
    {
        killTimer(timer_id_btn);
        ui->pushButton_5->setText("启动");
    }
}