天天向上

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QMessageBox>

#include <QTime>

#include <QDebug>

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

    , ui(new Ui::MainWindow)

{

    ui->setupUi(this);

}

MainWindow::~MainWindow()

{

    delete ui;

}

void MainWindow::on_pushButton_clicked()

{

    QMessageBox::about(this, "About", "This is an about dialog");

}

void MainWindow::on_pushButton_2_clicked()

{

    QMessageBox::aboutQt(this, "Something about QT");

}

void MainWindow::on_pushButton_3_clicked()

{

    QMessageBox::critical(this,"Error occured","You should check out what happened!");

}

void MainWindow::on_pushButton_4_clicked()

{

    QTime dt_now = QTime::currentTime();

    QMessageBox::information(this, "Current Time: ", dt_now.toString());

}

void MainWindow::on_pushButton_5_clicked()

{

    QMessageBox::StandardButton reply = QMessageBox::question(this, "Login","Are you ready to go?",

                                                              QMessageBox::Yes | QMessageBox::No);

    if(reply == QMessageBox::Yes)

    {

        QMessageBox::information(this, "Yes", "You've selected 'Yes' button");

        qDebug() << "Yes is clicked" << endl;

    }else if(reply == QMessageBox::No)

    {

         QMessageBox::information(this, "No", "You've selected 'No' button");

         qDebug() << "No is clicked" << endl;

    }

}

void MainWindow::on_pushButton_6_clicked()

{

    QMessageBox::warning(this, "Warning","Some warning messages have occured!");

}