QT 第二天（作业）

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include "QMouseEvent"

#include <QMainWindow>

#include <QLabel>

#include <QLineEdit>

#include <QPushButton>

#include <second.h>

class MainWindow : public QMainWindow

{

    Q_OBJECT

signals:

    void jump();

public slots:

    void on_okbtn_clicked();

public:

    void mousePressEvent(QMouseEvent *ev);

    MainWindow(QWidget *parent = nullptr);

    ~MainWindow();

};

#endif // MAINWINDOW_H

#ifndef SECOND_H

#define SECOND_H

#include "mainwindow.h"

#include <QWidget>

namespace Ui {

class second;

}

class second : public QWidget

{

    Q_OBJECT

public slots:

    void jump_slot();

public:

    explicit second(QWidget *parent = nullptr);

    ~second();

private:

    Ui::second *ui;

};

#endif // SECOND_H

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])

{

    QApplication a(argc, argv);

    MainWindow w;

    second secd;

    w.show();

   QObject::connect(&w,&MainWindow::jump,&secd,&second::jump_slot);

    return a.exec();

}

#include "second.h"

#include "ui_second.h"

second::second(QWidget *parent) :

    QWidget(parent),

    ui(new Ui::second)

{

    ui->setupUi(this);

}

void second::jump_slot()

{

    this->show();

}

second::~second()

{

    delete ui;

}