Qt 登陆界面实现

新项目要用到Qt，所以最近研究Qt，昨天安装好部署好Qt Creator现在马上开始第一个程序。

做一个简单的登陆界面功能

效果图如下

代码部分

View Code

#include <QtGui/QApplication>

#include "mainwindow.h"

#include "LoginDlg.h"

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

{

    QApplication a(argc, argv);

    MainWindow w; //主界面



    LoginDlg login; //登陆界面

    if(login.exec()==QDialog::Accepted)

    {

         w.show();

         return a.exec();

    }

    else return 0;



}

View Code

#ifndef LOGINDLG_H

#define LOGINDLG_H



#include <QDialog>



namespace Ui {

    class LoginDlg;

}



class LoginDlg : public QDialog {

    Q_OBJECT

public:

    LoginDlg(QWidget *parent = 0);

    ~LoginDlg();



protected:

    void changeEvent(QEvent *e);



private:

    Ui::LoginDlg *ui;



private slots:

    void on_pushButton_2_clicked();

    void on_pushButton_clicked();

};



#endif // LOGINDLG_H

View Code

#include "logindlg.h"

#include "ui_logindlg.h"

#include "QMessageBox.h"

#include "QTextCodec.h"

LoginDlg::LoginDlg(QWidget *parent) :

    QDialog(parent),

    ui(new Ui::LoginDlg)

{

    ui->setupUi(this);

}



LoginDlg::~LoginDlg()

{

    delete ui;

}



void LoginDlg::changeEvent(QEvent *e)

{

    QDialog::changeEvent(e);

    switch (e->type()) {

    case QEvent::LanguageChange:

        ui->retranslateUi(this);

        break;

    default:

        break;

    }

}



void LoginDlg::on_pushButton_clicked()

{

  if(this->ui->txtname->text().trimmed()== tr("admin") &&

     this->ui->txtpwd->text().trimmed()==tr("admin"))

  {

      accept();

  }

  else

  {

      QTextCodec::setCodecForTr( QTextCodec::codecForName("GBK") );

      QMessageBox::warning(this,tr("警告"),tr("用户名或密码错误!"),QMessageBox::Yes);

      this->ui->txtname->clear();

      this->ui->txtpwd->clear();

      this->ui->txtname->setFocus();

  }

}



void LoginDlg::on_pushButton_2_clicked()

{

    this->close();

}

代码很简单实现基本功能