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

C/C++ Source or Header | 1998-03-26 | 5KB | 212 lines

// strlstvw.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 "strlstvw.h"

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

/////////////////////////////////////////////////////////////////////////////
// CStringListView

IMPLEMENT_DYNCREATE(CStringListView, CFormView)

CStringListView::CStringListView()
    : CFormView(CStringListView::IDD)
{
    //{{AFX_DATA_INIT(CStringListView)
    m_strElement = "";
    //}}AFX_DATA_INIT
}

CStringListView::~CStringListView()
{
}

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

    // Copy all of the strings from the document's CStringList
    // to the listbox.
    m_ctlList.ResetContent();
    CStringList& stringList = GetDocument()->m_stringList;
    POSITION pos = stringList.GetHeadPosition();
    while (pos != NULL)
    {
        CString str = stringList.GetNext(pos);
        m_ctlList.AddString(str);
    }
}

void CStringListView::DoDataExchange(CDataExchange* pDX)
{
    CFormView::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CStringListView)
    DDX_Control(pDX, IDC_LIST, m_ctlList);
    DDX_Text(pDX, IDC_ELEMENT, m_strElement);
    //}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CStringListView, CFormView)
    //{{AFX_MSG_MAP(CStringListView)
    ON_BN_CLICKED(IDC_ADD, OnAdd)
    ON_BN_CLICKED(IDC_REMOVE, OnRemove)
    ON_BN_CLICKED(IDC_REMOVE_ALL, OnRemoveAll)
    ON_BN_CLICKED(IDC_UPDATE, OnUpdateElement)
    ON_LBN_SELCHANGE(IDC_LIST, OnSelChangeList)
    ON_BN_CLICKED(IDC_INSERT_BEFORE, OnInsertBefore)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()



/////////////////////////////////////////////////////////////////////////////
// CStringListView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CStringListView internal implementation

BOOL CStringListView::FindString(int& nSel, POSITION& pos)
{
    nSel = m_ctlList.GetCurSel();
    if (nSel == LB_ERR)
    {
        AfxMessageBox(IDS_SELECT_STRING_FIRST);
        return FALSE;
    }

    // The currently selected string in the listbox is the string
    // to be updated or removed .
    CString strOld;
    m_ctlList.GetText(nSel, strOld);

    // Find the string to be updated or replaced in the CStringList.
    CStringList& stringList = GetDocument()->m_stringList;
    pos = stringList.Find(strOld);

    // If the string is in the listbox, it should also be in the
    // CStringList.
    ASSERT(pos != NULL);

    return TRUE;
}

/////////////////////////////////////////////////////////////////////////////
// CStringListView message handlers

void CStringListView::OnAdd()
{
    if (UpdateData() != TRUE)
        return;

    // Add new string to the CStringList
    GetDocument()->m_stringList.AddTail(m_strElement);

    // Add new string to the listbox.
    m_ctlList.AddString(m_strElement);
}

void CStringListView::OnInsertBefore()
{
    if (UpdateData() != TRUE)
        return;

    int nSel;
    POSITION pos;
    // Find the string in both the CStringList and in the listbox.
    if (FindString(nSel, pos) != TRUE)
        return;

    // Insert in front of the string found in the CStringList
    GetDocument()->m_stringList.InsertBefore(pos, m_strElement);

    // Insert new string in the listbox
    m_ctlList.InsertString(nSel, m_strElement);
}

void CStringListView::OnUpdateElement()
{
    if (UpdateData() != TRUE)
        return;

    int nSel;
    POSITION pos;
    // Find the string in both the CStringList and in the listbox.
    if (FindString(nSel, pos) != TRUE)
        return;

    // Replace the value of the string in the CStringList.
    GetDocument()->m_stringList.SetAt(pos, m_strElement);

    // Replace the value of the string in the listbox by
    // removing the old string and adding the new string.
    m_ctlList.DeleteString(nSel);
    m_ctlList.InsertString(nSel, m_strElement);
}

void CStringListView::OnRemove()
{
    int nSel;
    POSITION pos;
    // FInd the string in both the CStringList and in the listbox.
    if (FindString(nSel, pos) != TRUE)
        return;

    // Remove the string from the CStringList.
    GetDocument()->m_stringList.RemoveAt(pos);

    // Remove the string from the listbox.
    m_ctlList.DeleteString(nSel);
}

void CStringListView::OnRemoveAll()
{
    // Remove all of the strings from the CStringList.
    GetDocument()->m_stringList.RemoveAll();

    // Remove all of the strings from the listbox.
    m_ctlList.ResetContent();
}


void CStringListView::OnSelChangeList()
{
    // Update the edit control to reflect the new selection
    // in the listbox.
    m_ctlList.GetText(m_ctlList.GetCurSel(), m_strElement);
    UpdateData(FALSE);
}