7.27 Qt

制作简易小闹钟

Timer.pro

QT       += core gui texttospeech

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    widget.cpp

HEADERS += \
    widget.h

FORMS += \
    widget.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

widget.h

#ifndef WIDGET_H
#define WIDGET_H

#include 
#include    //定时器事件头文件
#include 
#include 
#include 
#include 
#include 
#include 
#include 

QT_BEGIN_NAMESPACE
namespace Ui { class Widget; }
QT_END_NAMESPACE

class Widget : public QWidget
{
    Q_OBJECT

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

    void timerEvent(QTimerEvent *e);  //要重写定时器事件处理时间

private slots:
    void on_OnBtn_clicked();

    void on_OffBtn_clicked();

private:
    Ui::Widget *ui;

    QTimer *t1;

    //基于事件处理的定时器id
    int tId;

    QTextToSpeech *speech;


};
#endif // WIDGET_H

main.cpp

#include "widget.h"

#include 

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Widget w;
    w.show();
    return a.exec();
}

widget.cpp

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

Widget::Widget(QWidget *parent)
    : QWidget(parent)
    , ui(new Ui::Widget)
{
    ui->setupUi(this);

    this->setWindowTitle("---迷你闹钟---");

    speech=new QTextToSpeech;

}

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


//启动按钮处理事件
void Widget::on_OnBtn_clicked()
{
    if(ui->OnBtn->text()=="ON")
    {
        //启动一个定时器
        tId=startTimer(1000);   //启动一个定时器，每隔1000毫秒会自动执行timeEvent函数
        ui->OnBtn->setEnabled(false);
        ui->timeEdit->setEnabled(false);
        ui->textEdit->setEnabled(false);
        ui->currentLab->setEnabled(false);
    }

}

//停止按钮处理事件
void Widget::on_OffBtn_clicked()
{
    if(ui->OffBtn->text()=="OFF")
    {
         //关闭一个定时器
        this->killTimer(tId);
        ui->OnBtn->setEnabled(true);
        ui->OffBtn->setEnabled(false);
        ui->timeEdit->setEnabled(true);
        ui->textEdit->setEnabled(true);
        ui->timeEdit->clear();
    }
}

//定时器事件处理函数定义
void Widget::timerEvent(QTimerEvent *e)
{
    //判断是哪个定时器到位
    if(e->timerId()==tId)
    {
        //获取系统时间
        QTime sys_time=QTime::currentTime();  //QTime类对象

        //将时间转换成字符串
        QString t=sys_time.toString("hh-mm-ss");   //时分秒，都是两位数

        //将字符串展示到ui界面
        ui->currentLab->setText(t);
        ui->currentLab->setAlignment(Qt::AlignCenter);   //将时间放在中间
        if(ui->timeEdit->text()==ui->currentLab->text())
        {
            QString text=ui->textEdit->toPlainText();
            speech->say(text);
        }
    }

}

思维导图