9.2 消息对话框 画板 定时器

#include "widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
{

    //设置定时器
    timer=new QTimer(this);
    timeid=this->startTimer(1000);
    connect(timer,&QTimer::timeout,this,&Widget::timeout_slot);
    speecher=new QTextToSpeech(this);
    //边框
    this->setFixedSize(500,400);
    this->setWindowTitle("时钟");
    //时钟框
    lab=new QLabel(this);
    this->lab->resize(220,50);
    this->lab->move(50,50);
    //闹钟框
    edit=new QLineEdit(this);
    this->edit->setInputMask("00:00");
    this->edit->resize(150,50);
    this->edit->move(300,30);
    //启动按钮
    but1=new QPushButton("启动",this);
    this->but1->resize(70,30);
    this->but1->move(edit->x(),edit->y()+70);
    //停止按钮
    but2=new QPushButton("关闭",this);
    this->but2->resize(70,30);
    this->but2->move(but1->x()+90,but1->y());
    //语音播报框
    text=new QTextEdit(this);
    this->text->setPlaceholderText("铃声");
    this->text->resize(400,200);
    this->text->move(50,150);
    connect(but1,&QPushButton::clicked,this,&Widget::on_but1_clicked);
    connect(but2,&QPushButton::clicked,this,&Widget::on_but2_clicked);
}

Widget::~Widget()
{
}
void Widget::timerEvent(QTimerEvent *event)
{
        if(event->timerId()==timeid)
        {
        QDateTime sys_dt=QDateTime::currentDateTime();
        //展示时间到ui界面
        this->lab->setText(sys_dt.toString("hh:mm"));
        this->lab->setAlignment(Qt::AlignCenter);//设置标签文本对齐方式
        this->lab->setFont(QFont("宋体",15));
        }
}

void Widget::on_but1_clicked()
{
    timeid1=this->startTimer(5000);
    but1->setEnabled(false);
    text->setEnabled(false);

}
void Widget::on_but2_clicked()
{
    int ret=QMessageBox::information(this,"提示","是否取消闹钟",QMessageBox::Yes|QMessageBox::No,QMessageBox::Yes);
    if(QMessageBox::Yes==ret)
    {
        this->killTimer(timeid1);
        but1->setEnabled(true);
        text->setEnabled(true);
        edit->clear();
    }

}
void Widget::timeout_slot()//处理timeout信号对应的槽函数
{
    if(lab->text()==edit->text())
    {
        QString lm=text->toPlainText();
        speecher->say(lm);
    }
}