9.12作业

1.

back.h

#ifndef BACK_H
#define BACK_H

#include <QDialog>

namespace Ui {
class Back;
}

class Back : public QDialog
{
    Q_OBJECT

public:
    explicit Back(QWidget *parent = nullptr);
    ~Back();

signals:
    void jumpback();

public slots:
    void back_slot();


private slots:
    void on_btn1_clicked();

    void on_btn2_clicked();

private:
    Ui::Back *ui;
};

#endif // BACK_H

login.h

#ifndef LOGIN_H
#define LOGIN_H

#include <QDialog>

namespace Ui {
class login;
}

class login : public QDialog
{
    Q_OBJECT

public:
    explicit login(QWidget *parent = nullptr);
    ~login();

public slots:
    void jump_slot();

private:
    Ui::login *ui;
};

#endif // LOGIN_H

loginback.h

#ifndef LOGINBACK_H
#define LOGINBACK_H

#include <QDialog>

namespace Ui {
class loginback;
}

class loginback : public QDialog
{
    Q_OBJECT

public:
    explicit loginback(QWidget *parent = nullptr);
    ~loginback();

signals:
    void jumpmain();

public slots:
    void nojump_slot();

private slots:
    void on_pushButton_clicked();

private:
    Ui::loginback *ui;
};

#endif // LOGINBACK_H

mywidget.h

#ifndef MYWIDGET_H
#define MYWIDGET_H

#include <QWidget>

QT_BEGIN_NAMESPACE
namespace Ui { class MyWidget; }
QT_END_NAMESPACE

class MyWidget : public QWidget
{
    Q_OBJECT

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

signals:
    void jump();
    void back();
    void registeruser();
    void nojump();

public slots:
    void jumpback_slot();
    void jumpmain_slot();
    void suc_slot();

private slots:
    void on_cancel_clicked();

    void on_login_clicked();

    void on_registerbtn_clicked();

private:
    Ui::MyWidget *ui;
};
#endif // MYWIDGET_H

registeruser.h

#ifndef REGISTERUSER_H
#define REGISTERUSER_H

#include <QDialog>

namespace Ui {
class registeruser;
}

class registeruser : public QDialog
{
    Q_OBJECT

public:
    explicit registeruser(QWidget *parent = nullptr);
    ~registeruser();

signals:
    void suc();

public slots:
    void registeruser_slot();

private slots:
    void on_pushButton_clicked();

private:
    Ui::registeruser *ui;
};

#endif // REGISTERUSER_H

back.cpp

#include "back.h"
#include "ui_back.h"

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

    this->setWindowFlag(Qt::FramelessWindowHint);

    this->setAttribute(Qt::WA_TranslucentBackground);
}

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

void Back::back_slot()
{
    this->show();
}

void Back::on_btn1_clicked()
{
    this->close();
}

void Back::on_btn2_clicked()
{
    this->close();
    emit jumpback();
}

login.cpp

#include "login.h"
#include "ui_login.h"

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

    this->setWindowFlag(Qt::FramelessWindowHint);

    this->setAttribute(Qt::WA_TranslucentBackground);
}

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

void login::jump_slot()
{
    this->show();
}

loginback.cpp

#include "loginback.h"
#include "ui_loginback.h"

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

    this->setWindowFlag(Qt::FramelessWindowHint);

    this->setAttribute(Qt::WA_TranslucentBackground);
}

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

void loginback::nojump_slot()
{
    this->show();
}

void loginback::on_pushButton_clicked()
{
    this->close();
    emit jumpmain();
}

main.cpp

#include "mywidget.h"
#include "login.h"
#include "back.h"
#include "loginback.h"
#include "registeruser.h"

#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MyWidget w;
    login l;
    Back b;
    loginback lb;
    registeruser r;

    QObject::connect(&w,&MyWidget::jump,&l,&login::jump_slot);
    QObject::connect(&w,&MyWidget::back,&b,&Back::back_slot);
    QObject::connect(&b,&Back::jumpback,&w,&MyWidget::jumpback_slot);
    QObject::connect(&lb,&loginback::jumpmain,&w,&MyWidget::jumpmain_slot);
    QObject::connect(&w,&MyWidget::nojump,&lb,&loginback::nojump_slot);
    QObject::connect(&w,&MyWidget::registeruser,&r,&registeruser::registeruser_slot);
    QObject::connect(&r,&registeruser::suc,&w,&MyWidget::suc_slot);

    w.show();
    return a.exec();
}

mywidget.cpp

#include "mywidget.h"
#include "ui_mywidget.h"

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

    this->setWindowFlag(Qt::FramelessWindowHint);

    this->setAttribute(Qt::WA_TranslucentBackground);
}

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

void MyWidget::jumpback_slot()
{
    this->show();
}

void MyWidget::jumpmain_slot()
{
    this->show();
}

void MyWidget::suc_slot()
{
    this->show();
}


void MyWidget::on_cancel_clicked()
{
    this->close();
    emit back();
}

void MyWidget::on_login_clicked()
{
    QString username = ui->username->text();
    QString passwd = ui->passwd->text();
    if(username == "admin" && passwd == "A_123456")
    {
        this->close();
        emit jump();
    }
    else
    {
        this->close();
        emit nojump();
    }

}

void MyWidget::on_registerbtn_clicked()
{
    this->close();
    emit registeruser();
}

registeruser.cpp

#include "registeruser.h"
#include "ui_registeruser.h"

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

    this->setWindowFlag(Qt::FramelessWindowHint);

    this->setAttribute(Qt::WA_TranslucentBackground);
}

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

void registeruser::registeruser_slot()
{
    this->show();
}

void registeruser::on_pushButton_clicked()
{
    this->close();
    emit suc();
}

2.思维导图