#include "logindialog.h"
#include "ui_logindialog.h"

LoginDialog::LoginDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::LoginDialog)
{
    ui->setupUi(this);
    setFixedSize(481,341);  //登录框固定大小
    ui->pwdLineEdit->setFocus();  //口令框置于焦点位置
}

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

void LoginDialog::on_loginPushButton_clicked()
{
    if (!ui->pwdLineEdit->text().isEmpty())  //判断输入是否为空
    {
        QSqlQuery query;
        query.exec("select PassWord from Member where MemberID='"+  ui->adminLineEdit->text() + "'");  //从数据库查询口令密码
        query.next();
        QString pwdMd5=strToMd5(ui->pwdLineEdit->text());
        if (query.value(0).toString() == pwdMd5)
        {
            QDialog::accept();  //验证通过
        }
        else
        {
            QMessageBox::warning(this,tr("密码错误"),tr("请重新输入密码！"),QMessageBox::Ok);
            ui->pwdLineEdit->clear();
            ui->pwdLineEdit->setFocus();
        }
    }
    else
    {
        ui->pwdLineEdit->setFocus();
    }
}
void LoginDialog::on_exitPushButton_clicked()
{
    QDialog::reject();//退出登录界面
}
QString LoginDialog::strToMd5(QString str)  //MD5加密方法
{
    QString strMd5;
    QByteArray qba;
    qba=QCryptographicHash::hash(str.toLatin1(),QCryptographicHash::Md5);
    strMd5.append(qba.toHex());
    return strMd5;
}