作业

pro文件：

QT       += texttospeech

头文件：

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
#include <QPushButton>  //按钮类
#include <QLabel>       //标签类
#include <QLineEdit>    //行编译器类
#include <QMoveEvent>
#include <QTimer>       //定时器类
#include <QTime>        //时间类

#include <QWidget>
#include <QtTextToSpeech>

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

public:
    Widget(QWidget *parent = nullptr);
    ~Widget();

    void mouseMoveEvent(QMouseEvent *event) override;       //鼠标移动事件
    void mousePressEvent(QMouseEvent *event) override;      //鼠标点击事件

private slots:
    void btn1_clicked();
    void btn2_clicked();

    void timeout_slot();

private:
    Ui::Widget *ui;

    //定义一个定时器变量
    QTimer t1;

    QPushButton *btn1;
    QPushButton *btn2;

    QLabel *lab1;

    QLineEdit *let1;
    QLineEdit *let2;

    QPoint temp;    //中间辅助向量

};
#endif // WIDGET_H

主文件：

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);
    this->resize(460,360);
    this->setWindowTitle("My First Window");    //设置窗口名称
    //设置 去除控件的头部
    this->setWindowFlag(Qt::FramelessWindowHint);
    this->move(300,400);

    //按钮1
    btn1 = new QPushButton("启动",this);
    btn1->resize(100,30);
    btn1->move(250,80);
    connect(btn1,&QPushButton::clicked,this,&Widget::btn1_clicked);

    //按钮2
    btn2 = new QPushButton("取消",this);
    btn2->resize(100,30);
    btn2->move(btn1->x()+btn1->width()+10,btn1->y());
    btn2->setEnabled(false);                    //设置开始不可用
    connect(btn2,&QPushButton::clicked,this,&Widget::btn2_clicked);

    //标签
    lab1 = new QLabel(this);
    lab1->resize(200,70);
    lab1->move(40,30);

    //行编译器
    let1 = new QLineEdit(this);
    let1->resize(210,30);
    let1->move(250,30);

    let2 = new QLineEdit(this);
    let2->resize(400,210);
    let2->move(40,110);
    let2->setText("三更灯火五更鸡,"
                  "正是男儿读书时,"
                  "黑发不知勤学早,"
                  "白首方悔读书迟。");

    //由于定时器事件的信号与槽绑定
    connect(&t1,&QTimer::timeout,this,&Widget::timeout_slot);
}

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

//鼠标移动事件
void Widget::mouseMoveEvent(QMouseEvent *event)
{
    this->move(event->globalPos() - temp);
}

//鼠标点击事件
void Widget::mousePressEvent(QMouseEvent *event)
{
    temp = event->globalPos() - this->pos();
    if(event->button() == Qt::RightButton)
    {
        this->close();
    }
}


void Widget::timeout_slot()
{

    //获取系统的时间
    QTime sysTime = QTime::currentTime();
    //将QTime类对象转变成字符串
    QString tm = sysTime.toString("hh:mm:ss");
    //将时间展示到ui界面上
    lab1->setText(tm);

    //设置标签其中显示
    lab1->setAlignment(Qt::AlignCenter);
}

//“启动”按钮
void Widget::btn1_clicked()
{
    t1.start(1000);      //每隔指定的时间发射一个timeout的信号

    btn1->setEnabled(false);    //使用期间数据不可更改
    let1->setEnabled(false);
    let2->setEnabled(false);

    btn2->setEnabled(true);

    //获取系统的时间
    QTime sysTime = QTime::currentTime();
    //将QTime类对象转变成字符串
    QString tm = sysTime.toString("hh:mm:ss");
    if(let1->text() == tm)
    {
        QTextToSpeech *Speecher=new QTextToSpeech;
        Speecher->say(tm);
    }
}

//“取消”按钮
void Widget::btn2_clicked()
{
    t1.stop();

    btn1->setEnabled(true);
    let1->setEnabled(true);
    let2->setEnabled(true);

    btn2->setEnabled(false);
}