exam8_3view.cpp

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// Exam8_3View.cpp : implementation of the CExam8_3View class
//
#include "stdafx.h"
#include "Exam8_3.h"

#include "Exam8_3Doc.h"
#include "Exam8_3View.h"


#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CExam8_3View

IMPLEMENT_DYNCREATE(CExam8_3View, CFormView)

BEGIN_MESSAGE_MAP(CExam8_3View, CFormView)
	//{{AFX_MSG_MAP(CExam8_3View)
	ON_COMMAND(IDC_STUDENT_INSERT, OnStudentInsert)
	ON_COMMAND(IDC_STUDENT_DEL, OnStudentDel)
	ON_UPDATE_COMMAND_UI(IDC_STUDENT_DEL, OnUpdateStudentDel)
	ON_COMMAND(IDC_STUDENT_END, OnStudentEnd)
	ON_UPDATE_COMMAND_UI(IDC_STUDENT_END, OnUpdateStudentEnd)
	ON_COMMAND(IDC_STUDENT_HOME, OnStudentHome)
	ON_UPDATE_COMMAND_UI(IDC_STUDENT_HOME, OnUpdateStudentHome)
	ON_COMMAND(IDC_STUDENT_NEXT, OnStudentNext)
	ON_UPDATE_COMMAND_UI(IDC_STUDENT_NEXT, OnUpdateStudentNext)
	ON_COMMAND(IDC_STUDENT_PREV, OnStudentPrev)
	ON_UPDATE_COMMAND_UI(IDC_STUDENT_PREV, OnUpdateStudentPrev)
	ON_COMMAND(IDC_EDIT_CLEAR, OnEditClear)
	ON_BN_CLICKED(IDC_CLEAR, OnClear)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CFormView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CFormView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CFormView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CExam8_3View construction/destruction

CExam8_3View::CExam8_3View()
	: CFormView(CExam8_3View::IDD)
{
	//{{AFX_DATA_INIT(CExam8_3View)
	m_Name = _T("");
	m_Grade = 0;
	//}}AFX_DATA_INIT
	// TODO: add construction code here

}

CExam8_3View::~CExam8_3View()
{
}

void CExam8_3View::DoDataExchange(CDataExchange* pDX)
{
	CFormView::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CExam8_3View)
	DDX_Text(pDX, IDC_NAME, m_Name);
	DDX_Text(pDX, IDC_GRADE, m_Grade);
	//}}AFX_DATA_MAP
}

BOOL CExam8_3View::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CFormView::PreCreateWindow(cs);
}

void CExam8_3View::OnInitialUpdate()
{
	CFormView::OnInitialUpdate();
	GetParentFrame()->RecalcLayout();
	ResizeParentToFit();

}

/////////////////////////////////////////////////////////////////////////////
// CExam8_3View printing

BOOL CExam8_3View::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CExam8_3View::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CExam8_3View::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

void CExam8_3View::OnPrint(CDC* pDC, CPrintInfo* /*pInfo*/)
{
	// TODO: add customized printing code here
}

/////////////////////////////////////////////////////////////////////////////
// CExam8_3View diagnostics

#ifdef _DEBUG
void CExam8_3View::AssertValid() const
{
	CFormView::AssertValid();
}

void CExam8_3View::Dump(CDumpContext& dc) const
{
	CFormView::Dump(dc);
}

CExam8_3Doc* CExam8_3View::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CExam8_3Doc)));
	return (CExam8_3Doc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CExam8_3View message handlers

void CExam8_3View::OnStudentInsert() 
{
	// TODO: Add your command handler code here
	UpdateData(true);//更新控件变量
	//调用文档类AddStu函数增加一条记录    
	GetDocument()->AddStu(m_Name,m_Grade);
	//索引值指向最后一条记录(新增记录)	
	m_StuIndex=GetDocument()->GetStuNumber()-1;
}

void CExam8_3View::OnStudentDel() 
{
	// TODO: Add your command handler code here
	//调用文档类DelStu函数删除当前记录	
	GetDocument()->DelStu(m_StuIndex);
}

void CExam8_3View::OnUpdateStudentDel(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(m_StuIndex>=0);
}

void CExam8_3View::OnStudentEnd() 
{
	// TODO: Add your command handler code here
	//最后一学生记录的索引值为记录总数-1	
	m_StuIndex=GetDocument()->GetStuNumber()-1 ;	
	if(m_StuIndex>0)	
	{   
		m_pStu=GetDocument()->GetStu(m_StuIndex);
		m_Grade=m_pStu->m_Grade;	
		m_Name=m_pStu->m_Name;	
		UpdateData(false);	
		UpdateWindow();
	}
}

void CExam8_3View::OnUpdateStudentEnd(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(m_StuIndex<GetDocument()->GetStuNumber()-1 );
}

void CExam8_3View::OnStudentHome() 
{
	// TODO: Add your command handler code here
	if(GetDocument()->GetStuNumber()>0) //文档数据不空	
	{
		m_StuIndex=0;//第一个记录索引值为0
		m_pStu=GetDocument()->GetStu(m_StuIndex);//获取第一个记录  
		//为控件变量赋值	
		m_Grade=m_pStu->m_Grade;	
		m_Name=m_pStu->m_Name;
		//更新视图	
		UpdateData(false);	
		UpdateWindow();
	}
}

void CExam8_3View::OnUpdateStudentHome(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(m_StuIndex>0);
}

void CExam8_3View::OnStudentNext() 
{
	// TODO: Add your command handler code here
	m_StuIndex++;//索引值向后移动1位    
	m_pStu=GetDocument()->GetStu(m_StuIndex);	
	m_Grade=m_pStu->m_Grade;	
	m_Name=m_pStu->m_Name;	
	UpdateData(false);	
	UpdateWindow();
}

void CExam8_3View::OnUpdateStudentNext(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(m_StuIndex<GetDocument()->GetStuNumber()-1 );
}

void CExam8_3View::OnStudentPrev() 
{
	// TODO: Add your command handler code here
	m_StuIndex--;//索引值向前移动1位    
	m_pStu=GetDocument()->GetStu(m_StuIndex);	
	m_Grade=m_pStu->m_Grade;	
	m_Name=m_pStu->m_Name;	
	UpdateData(false);	
	UpdateWindow();
}

void CExam8_3View::OnUpdateStudentPrev(CCmdUI* pCmdUI) 
{
	// TODO: Add your command update UI handler code here
	pCmdUI->Enable(m_StuIndex>0);
}

void CExam8_3View::OnEditClear() 
{
	// TODO: Add your command handler code here
	m_StuIndex=-1;//索引值设为1，表示文档数据为空
	//调用文档delStuAll删除所有记录，更新视图    
	GetDocument()->delStuAll();
}

void CExam8_3View::OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint) 
{
	// TODO: Add your specialized code here and/or call the base class
	if(GetDocument()->GetStuNumber()>0)//文档数据不为空        
	{ 
		m_StuIndex=0;  //索引值为0	
		m_pStu=GetDocument()->GetStu(0);//取第一个学生记录    
	}         
	else//文档数据为空   
	{   
		m_StuIndex=-1;//索引值为-1	  
		m_pStu=new CStudent("",0);//创建一个为空的学生记录   
	}   
	//为控件变量赋值，初始化视图	   
	m_Grade=m_pStu->m_Grade ;   
	m_Name=m_pStu->m_Name ;   
	UpdateData(false);
	
}

void CExam8_3View::OnClear() 
{
	// TODO: Add your control notification handler code here
	m_Name="";	
	m_Grade=0;	
	UpdateData(false);
}