mapview.cpp

如何使用STL中的映射关系呢？看看这个吧！

// MapView.cpp : implementation of the CMapView class
//

#include "stdafx.h"
#include "Map.h"

#include "MapDoc.h"
#include "MapView.h"
#include "GetMapDlg.h"


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

/////////////////////////////////////////////////////////////////////////////
// CMapView

IMPLEMENT_DYNCREATE(CMapView, CView)

BEGIN_MESSAGE_MAP(CMapView, CView)
	//{{AFX_MSG_MAP(CMapView)
	ON_WM_LBUTTONDOWN()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMapView construction/destruction

CMapView::CMapView()
{
	map.SetAt("1", "One");
	map.SetAt("2", "Two");
	map.SetAt("3", "Three");
	map.SetAt("4", "Four");
	map.SetAt("5", "Five");
	map.SetAt("6", "Six");
	map.SetAt("7", "Seven");
	map.SetAt("8", "Eight");
	map.SetAt("9", "Nine");
	map.SetAt("10", "Ten");
}

CMapView::~CMapView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMapView drawing

void CMapView::OnDraw(CDC* pDC)
{
    CMapDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);
    TEXTMETRIC textMetric;
    pDC->GetTextMetrics(&textMetric);
    int fontHeight = textMetric.tmHeight;
    int displayPosition = 10;
    POSITION pos = map.GetStartPosition();
    CString key;
    CString value;
    while (pos != NULL)
    {
        map.GetNextAssoc(pos, key, value);
        CString str = "Key '" + key + 
            "' is associated with the value '" +
            value + "'";
        pDC->TextOut(10, displayPosition, str);
        displayPosition += fontHeight;
    }
}

/////////////////////////////////////////////////////////////////////////////
// CMapView diagnostics

#ifdef _DEBUG
void CMapView::AssertValid() const
{
	CView::AssertValid();
}

void CMapView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

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

/////////////////////////////////////////////////////////////////////////////
// CMapView message handlers

void CMapView::OnLButtonDown(UINT nFlags, CPoint point) 
{
// Initialize the dialog box.    
    GetMapDlg dialog(this);
    dialog.m_key = "";
    // Display the dialog box.
    int result = dialog.DoModal();
    // If the user exits with the OK button...
    if (result == IDOK)
    {
        // Look for the requested value.
        CString value;
        BOOL found = map.Lookup(dialog.m_key, value);
        if (found)
            MessageBox(value);
        else
            MessageBox("No matching value.");
    }
    CView::OnLButtonDown(nFlags, point);
}