Tricks of the Windows Gam…ming Gurus (2nd Edition)/Disc2.iso/msdn_vcb/samples/vc98/mfc/advanced/collect/mapssvw.cpp

C/C++ Source or Header | 1998-03-27 | 5.3 KB | 211 lines

// mapssvw.cpp : implementation file
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.

#include "stdafx.h"
#include "collect.h"
#include "colledoc.h"
#include "mapssvw.h"

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CMapStringToStringView

IMPLEMENT_DYNCREATE(CMapStringToStringView, CFormView)

CMapStringToStringView::CMapStringToStringView()
    : CFormView(CMapStringToStringView::IDD)
{
    //{{AFX_DATA_INIT(CMapStringToStringView)
    m_strKey = "";
    m_strValue = "";
    //}}AFX_DATA_INIT
}

CMapStringToStringView::~CMapStringToStringView()
{
}

void CMapStringToStringView::OnInitialUpdate()
{
    CFormView::OnInitialUpdate();

    // Copy all of the assocations from the document's CMapStringToString
    // to the listbox.
    CString strKey, strValue;
    m_ctlList.ResetContent();
    CMapStringToString& map = GetDocument()->m_mapStringToString;
    POSITION pos = map.GetStartPosition();
    while (pos != NULL)
    {
        map.GetNextAssoc(pos, strKey, strValue);
        AddMapEntryToListBox(strKey, strValue);
    }
}

void CMapStringToStringView::DoDataExchange(CDataExchange* pDX)
{
    CFormView::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CMapStringToStringView)
    DDX_Control(pDX, IDC_LIST, m_ctlList);
    DDX_Text(pDX, IDC_KEY, m_strKey);
    DDX_Text(pDX, IDC_VALUE, m_strValue);
    //}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CMapStringToStringView, CFormView)
    //{{AFX_MSG_MAP(CMapStringToStringView)
    ON_BN_CLICKED(IDC_ADD_OR_UPDATE, OnAddOrUpdate)
    ON_BN_CLICKED(IDC_FIND, OnFind)
    ON_BN_CLICKED(IDC_REMOVE, OnRemove)
    ON_BN_CLICKED(IDC_REMOVE_ALL, OnRemoveAll)
    ON_LBN_SELCHANGE(IDC_LIST, OnSelChangeList)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()



/////////////////////////////////////////////////////////////////////////////
// CMapStringToStringView diagnostics

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

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

CCollectDoc* CMapStringToStringView::GetDocument() // non-debug version is inline
{
    return STATIC_DOWNCAST(CCollectDoc, m_pDocument);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CMapStringToStringView internal implementation

int CMapStringToStringView::FindKeyInListBox(CString& strKey)
{
    CString strValue;
    if (GetDocument()->m_mapStringToString.Lookup(strKey, strValue) != TRUE)
        return LB_ERR;
    CString strListBoxEntry = strKey;
    strListBoxEntry += _T(" >> ");
    strListBoxEntry += strValue;
    return m_ctlList.FindString(-1, strListBoxEntry);
}

void CMapStringToStringView::AddMapEntryToListBox(CString& strKey, CString& strValue)
{
    CString str = strKey;
    str += _T(" >> ");
    str += strValue;
    m_ctlList.AddString(str);
}

/////////////////////////////////////////////////////////////////////////////
// CMapStringToStringView message handlers

void CMapStringToStringView::OnAddOrUpdate()
{
    if (UpdateData() != TRUE)
        return;

    // Add or replace entry in the listbox
    int nSel = FindKeyInListBox(m_strKey);
    if (nSel != LB_ERR)
        m_ctlList.DeleteString(nSel);
    AddMapEntryToListBox(m_strKey, m_strValue);

    // Add or update association in the CMapStringToString
    GetDocument()->m_mapStringToString[m_strKey] = m_strValue;
}

void CMapStringToStringView::OnFind()
{
    if (UpdateData() != TRUE)
        return;

    CString strValue;
    if (GetDocument()->m_mapStringToString.Lookup(m_strKey, strValue) != TRUE)
    {
        AfxMessageBox(IDS_KEY_NOT_FOUND);
        return;
    }

    m_strValue = strValue;
    UpdateData(FALSE);  // update the value found in the map lookup
}

void CMapStringToStringView::OnRemove()
{
    if (UpdateData() != TRUE)
        return;

    CString strValue;
    CMapStringToString& map = GetDocument()->m_mapStringToString;
    if (map.Lookup(m_strKey, strValue) != TRUE)
    {
        AfxMessageBox(IDS_KEY_NOT_FOUND);
        return;
    }

    if (strValue != m_strValue)
    {
        m_strValue = strValue;
        UpdateData(FALSE);
        AfxMessageBox(IDS_KEY_NOT_FOUND_CHOOSE_REMOVE_AGAIN);
        return;
    }

    // Remove assocation from the listbox
    int nSel = FindKeyInListBox(m_strKey);
    ASSERT(nSel != LB_ERR);
    m_ctlList.DeleteString(nSel);

    // Remove the association from the CMapStringToString
    map.RemoveKey(m_strKey);
}

void CMapStringToStringView::OnRemoveAll()
{
    GetDocument()->m_mapStringToString.RemoveAll();
    m_ctlList.ResetContent();
}

void CMapStringToStringView::OnSelChangeList()
{
    // Update the "key" field to reflect the new selection in the listbox.
    CString str;
    m_ctlList.GetText(m_ctlList.GetCurSel(), str);
    m_strKey.Empty();
    LPCTSTR lpsz = str;
    while (*lpsz != ' ' || *(lpsz+1) != '>' || *(lpsz+2) != '>')
    {
        m_strKey += *lpsz;
        lpsz++;
    }
    UpdateData(FALSE);

    // Now that the key field has been updated to reflect the listbox selection,
    // find the string in the map as though the user had hit the Find button.
    OnFind();
}