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学生成绩管理系统.zip(免费下载)[39 次下载]#include "LoginDialog.h" |
#include "ui_LoginDialog.h" |
#include <QVBoxLayout> |
LoginDialog::LoginDialog(QWidget *parent) : |
QDialog(parent), |
ui(new Ui::LoginDialog) |
{ |
ui->setupUi(this); |
//创建QSqlTableModel |
model=new QSqlTableModel(this); |
model->setEditStrategy(QSqlTableModel::OnManualSubmit); |
//设置登录对话框的标题 |
this->setWindowTitle("登录"); |
//设置登录对话框的图标 |
this->setWindowIcon(QIcon(":/student/img/book.jpg")); |
//设置登录对话框大小固定为399*252 |
this->setMaximumSize(399,252); |
this->setMinimumSize(399,252); |
//设置调色板,用于设置titlelabel的颜色 |
QPalette p; |
p.setColor(QPalette::WindowText,Qt::black); |
ui->titlelabel->setPalette(p); |
//设置调色板,用于设置logindialog的背景 |
QPalette palette; |
palette.setBrush(QPalette::Background,QBrush(QPixmap(":/student/img/loginbk1.jpg").scaled(this->size()))); |
this->setPalette(palette); |
//设置三个按钮的图标 |
ui->exitbtn->setIcon(QIcon(":/student/img/exit.png")); |
ui->registerbtn->setIcon(QIcon(":/student/img/log.png")); |
ui->loginbtn->setIcon(QIcon(":/student/img/Enter.png")); |
//设置groupbox，放置两个radiobutton |
radiogroup=new QButtonGroup(this); |
radiogroup->addButton(ui->studentradio,0); |
radiogroup->addButton(ui->teacherradio,1); |
//设置图片 |
ui->piclabel->setPixmap(QPixmap(":/student/img/log.png").scaled(ui->piclabel->size())); |
//设置登录按钮不可用 |
ui->loginbtn->setEnabled(false); |
//设置lineedit提示语句 |
ui->userline->setPlaceholderText("请输入用户名"); |
ui->passwordline->setPlaceholderText("请输入密码"); |
//设置passlineedit显示为密码模式 |
ui->passwordline->setEchoMode(QLineEdit::Password); |
//连接信号与槽 |
connect(ui->loginbtn,SIGNAL(clicked()),this,SLOT(loginbtnSlot())); |
connect(ui->registerbtn,SIGNAL(clicked()),this,SLOT(registerbtnSlot())); |
connect(ui->exitbtn,SIGNAL(clicked()),this,SLOT(exitbtnSlot())); |
//设置登录按钮可用 |
connect(ui->userline,SIGNAL(textChanged(QString)),this,SLOT(loginbtnSetSlot(QString))); |
connect(ui->passwordline,SIGNAL(textChanged(QString)),this,SLOT(loginbtnSetSlot(QString))); |
} |
LoginDialog::~LoginDialog() |
{ |
delete ui; |
} |
void LoginDialog::loginbtnSlot() |
{ |
if(!this->judgeEmpty()) |
{ |
ui->passwordline->clear(); |
return; |
} |
//判断是否学生登录 |
if(radiogroup->checkedId()==0) |
{ |
model->setTable("student"); |
model->select(); |
int i; |
for(i=0;i<model->rowCount();i++) |
{ |
QSqlRecord record=model->record(i); |
if(record.value(0)==ui->userline->text()&& |
record.value(5)==ui->passwordline->text()) |
{ |
QString str1="登录成功"; |
QString str2=record.value(1).toString(); |
QString str3="学生"; |
QMessageBox::information(this,"提示",str3+str2+str1,QMessageBox::Yes); |
this->clearAll(); |
//创建学生成绩管理窗口 |
student=new StudentManage; |
//连接学生成绩管理窗口和登录对话框信号与槽 |
connect(student,SIGNAL(toLoginDialog()),this,SLOT(showNormal())); |
student->show(); |
connect(this,SIGNAL(toStudentManage(QString,QString)),student,SLOT(comeLoginDialog(QString,QString))); |
emit toStudentManage(str2,record.value(0).toString()); |
this->hide(); |
return; |
} |
else if(record.value(0)==ui->userline->text()&& |
record.value(5)!=ui->passwordline->text()) |
{ |
QMessageBox::information(this,"提示","密码输入有误",QMessageBox::Yes); |
this->clearAll(); |
return; |
} |
} |
QMessageBox::warning(this,"提示","用户不存在,请注册",QMessageBox::Yes); |
this->clearAll(); |
return; |
} |
else if(radiogroup->checkedId()==1) |
{ |
model->setTable("teacher"); |
model->select(); |
int i; |
for(i=0;i<model->rowCount();i++) |
{ |
QSqlRecord record=model->record(i); |
if(record.value(0)==ui->userline->text()&& |
record.value(2)==ui->passwordline->text()) |
{ |
QString str1="登录成功"; |
QString str2=record.value(1).toString(); |
QString str3="教师"; |
QMessageBox::information(this,"提示",str3+str2+str1,QMessageBox::Yes); |
//创建教师成绩管理窗口 |
teacher=new TeacherManage; |
teacher->show(); |
connect(this,SIGNAL(toTeacherManage(QString,QString)),teacher,SLOT(comeLoginDialog(QString,QString))); |
connect(teacher,SIGNAL(toLoginDialog()),this,SLOT(showNormal())); |
emit toTeacherManage(str2,record.value(0).toString()); |
this->clearAll(); |
this->hide(); |
return; |
} |
else if(record.value(0)==ui->userline->text()&& |
record.value(2)!=ui->passwordline->text()) |
{ |
QMessageBox::information(this,"提示","密码输入有误",QMessageBox::Yes); |
this->clearAll(); |
return; |
} |
} |
QMessageBox::warning(this,"提示","用户不存在,请注册",QMessageBox::Yes); |
this->clearAll(); |
return; |
} |
else |
QMessageBox::warning(this,"警告","请选择登录方式",QMessageBox::Yes); |
} |
void LoginDialog::registerbtnSlot() |
{ |
RegisterDialog d(this); |
this->hide(); |
if(d.exec()==QDialog::Accepted) |
{ |
this->showNormal(); |
} |
this->clearAll(); |
} |
void LoginDialog::exitbtnSlot() |
{ |
this->close(); |
} |
void LoginDialog::loginbtnSetSlot(QString) |
{ |
ui->loginbtn->setEnabled(true); |
} |
void LoginDialog::clearAll() |
{ |
ui->userline->clear(); |
ui->passwordline->clear(); |
} |
bool LoginDialog::judgeEmpty() |
{ |
if(ui->userline->text().isEmpty()) |
{ |
QMessageBox::warning(this,"警告","用户名不能为空"); |
return false; |
} |
if(ui->passwordline->text().isEmpty()) |
{ |
QMessageBox::warning(this,"警告","密码不能为空"); |
return false; |
} |
else |
return true; |
} |
学生成绩管理系统.zip(免费下载)[39 次下载]
中级程序员
by: 东城 发表于：2016-05-16 20:42:03 顶(1) | 踩(0) 回复
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