window.cpp

使用QT编写了简单的学生管理系统

#include "window.h"
#include<QMessageBox>
//
Window::Window( QWidget *parent)
        : QWidget( parent)
{
    //界面控制代码
    groupBox = new QGroupBox(parent);
    groupBox->setObjectName(QString::fromUtf8("groupBox"));
    groupBox->setGeometry(QRect(20, 10, 261, 201));
    label = new QLabel(QString::fromUtf8("No"),groupBox);
    label->setObjectName(QString::fromUtf8("label"));
    label->setGeometry(QRect(20, 50, 41, 21));
    QFont font;
    font.setPointSize(10);
    font.setBold(true);
    font.setWeight(75);
    label->setFont(font);
    editNo = new QLineEdit(groupBox);
    editNo->setObjectName(QString::fromUtf8("editNo"));
    editNo->setGeometry(QRect(70, 50, 161, 20));
    editName = new QLineEdit(groupBox);
    editName->setObjectName(QString::fromUtf8("editName"));
    editName->setGeometry(QRect(70, 80, 161, 20));
    label_3 = new QLabel(QString::fromUtf8("Name"),groupBox);
    label_3->setObjectName(QString::fromUtf8("label_3"));
    label_3->setGeometry(QRect(20, 80, 41, 21));
    QFont font1;
    font1.setPointSize(10);
    font1.setBold(true);
    font1.setWeight(75);
    label_3->setFont(font1);
    label_4 = new QLabel(QString::fromUtf8("Class"),groupBox);
    label_4->setObjectName(QString::fromUtf8("label_4"));
    label_4->setGeometry(QRect(20, 110, 41, 21));
    QFont font2;
    font2.setPointSize(10);
    font2.setBold(true);
    font2.setWeight(75);
    label_4->setFont(font2);
    label_2 = new QLabel(QString::fromUtf8("Student Information"),groupBox);
    label_2->setObjectName(QString::fromUtf8("label_2"));
    label_2->setGeometry(QRect(50, 10, 190, 31));
    QFont font3;
    font3.setFamily(QString::fromUtf8("Courier New"));
    font3.setPointSize(13);
    font3.setBold(true);
    font3.setWeight(75);
    label_2->setFont(font3);
    editClass = new QLineEdit(groupBox);
    editClass->setObjectName(QString::fromUtf8("editClass"));
    editClass->setGeometry(QRect(70, 110, 161, 20));
    
    btAdd = new QPushButton(tr("Add"),groupBox);
    btAdd->setObjectName(QString::fromUtf8("btAdd"));
    btAdd->setGeometry(QRect(10, 160, 45, 23));
    btSave = new QPushButton(tr("Save"),groupBox);
    btSave->setObjectName(QString::fromUtf8("btAdd"));
    btSave->setGeometry(QRect(60, 160, 45, 23));
    btFirst = new QPushButton(tr("|<"),groupBox);
    btFirst->setObjectName(QString::fromUtf8("btFirst"));
    btFirst->setGeometry(QRect(110, 160, 21, 23));
    btPre = new QPushButton(tr("<"),groupBox);
    btPre->setObjectName(QString::fromUtf8("btPre"));
    btPre->setGeometry(QRect(130, 160, 21, 23));
    btNext = new QPushButton(tr(">"),groupBox);
    btNext->setObjectName(QString::fromUtf8("btNext"));
    btNext->setGeometry(QRect(150, 160, 21, 23));
    btLast = new QPushButton(tr(">|"),groupBox);
    btLast->setObjectName(QString::fromUtf8("btLast"));
    btLast->setGeometry(QRect(170, 160, 21, 23));
    btMove = new QPushButton(tr("delete"),groupBox);
    btMove->setObjectName(QString::fromUtf8("btMove"));
    btMove->setGeometry(QRect(200, 160, 45, 23));
    list = new StList();
    
   //按添加文本框清空
   connect( btAdd, SIGNAL(clicked()), editName, SLOT(clear()) );
   connect( btAdd, SIGNAL(clicked()), editNo, SLOT(clear()) ); 
   connect( btAdd, SIGNAL(clicked()), editClass, SLOT(clear()) );
   
   //保存按钮的事件
   connect( btSave, SIGNAL(clicked()), this, SLOT(setStudent()) );
   
   //向后按钮的事件
   connect( btNext, SIGNAL(clicked()), list, SLOT(next()) );

   //向前按钮的事件
   connect( btPre, SIGNAL(clicked()), list, SLOT(prev()) );
  
    //最前按钮的事件
   connect( btFirst, SIGNAL(clicked()), list, SLOT(first()) ); 
   
    //最后按钮的事件
   connect( btLast, SIGNAL(clicked()), list, SLOT(last()) );

   connect( list, SIGNAL(noChanged(QString)), editNo, SLOT(setText(const QString&)) );
   connect( list, SIGNAL(nameChanged(QString)), editName, SLOT(setText(const QString&)) );
   connect( list, SIGNAL(classChanged(QString)), editClass, SLOT(setText(const QString&)) );
    
    //删除按钮的事件
    connect( btMove, SIGNAL(clicked()), editName, SLOT(clear()) );
    connect( btMove, SIGNAL(clicked()), editNo, SLOT(clear()) ); 
    connect( btMove, SIGNAL(clicked()), editClass, SLOT(clear()) );
    connect( btMove, SIGNAL(clicked()), list, SLOT(remove()) );
    
    QVBoxLayout *layout = new QVBoxLayout;
    layout->addWidget(groupBox);
     QSize size(299, 234);
    this->resize(size);
    this->setLayout(layout);

    
   
}
//添加学生信息的槽函数
void Window::setStudent()
{
	if(this->getStudentNo().isEmpty()||this->getStudentName().isEmpty()
		||this->getStudentClass().isEmpty())
		{
			QMessageBox::warning (this, tr("Student Information"),
	tr("The no,name,class can not empty!"));
	return ;	
		}
	student = new Student(this->getStudentNo(),this->getStudentName(),
	                      this->getStudentClass()); 
	list->append(*student);                   
}
//