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

C/C++ Source or Header | 1998-03-27 | 5.2 KB | 223 lines

// intlstvw.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 "intlstvw.h"

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

/////////////////////////////////////////////////////////////////////////////
// CIntListView

IMPLEMENT_DYNCREATE(CIntListView, CFormView)

CIntListView::CIntListView()
    : CFormView(CIntListView::IDD)
{
    //{{AFX_DATA_INIT(CIntListView)
    m_int = 0;
    //}}AFX_DATA_INIT
}

CIntListView::~CIntListView()
{
}

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

    // Copy all of the integers from the document's CList<int,int>
    // to the listbox.
    m_ctlList.ResetContent();
    CList<int,int>& intList = GetDocument()->m_intList;
    POSITION pos = intList.GetHeadPosition();
    while (pos != NULL)
    {
        int n = intList.GetNext(pos);
        AddIntToListBox(n);
    }
}


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


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



/////////////////////////////////////////////////////////////////////////////
// CIntListView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CIntListView internal implementation

BOOL CIntListView::FindInt(int& nSel, POSITION& pos)
{
    nSel = m_ctlList.GetCurSel();
    if (nSel == LB_ERR)
    {
        AfxMessageBox(IDS_SELECT_INTEGER);
        return FALSE;
    }

    int nValue = (int)m_ctlList.GetItemData(nSel);

    // Find the integer in the integer list.
    pos = GetDocument()->m_intList.Find(nValue);

    // If the integer is in the listbox, it must also be in the integer list
    ASSERT(pos != NULL);

    return TRUE;
}

void CIntListView::AddIntToListBox(int n, int nSel)
{
    // Add new integer to the listbox.
    CString str;
    str.Format(_T("%i"),n);
    if (nSel == -1)
        nSel = m_ctlList.AddString(str);
    else
        m_ctlList.InsertString(nSel, str);

    // Save the integer as the listbox entry's "data item".
    m_ctlList.SetItemData(nSel, (DWORD)n);
}


/////////////////////////////////////////////////////////////////////////////
// CIntListView message handlers

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

    // Add new integer to the CList<int,int>
    GetDocument()->m_intList.AddTail(m_int);

    AddIntToListBox(m_int);
}

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

    int nSel;
    POSITION pos;
    // Find the integer in both the CList<int,int> and the listbox.
    if (FindInt(nSel, pos) != TRUE)
        return;


    // Insert in front of the integer found in the CList<int,int>
    POSITION posTemp = GetDocument()->m_intList.InsertBefore(pos, m_int);

    // Insert new integer in the listbox
    AddIntToListBox(m_int, nSel);
}

void CIntListView::OnUpdate()
{
    if (UpdateData() != TRUE)
        return;

    int nSel;
    POSITION pos;
    // Find the integer in both the CList<int,int> and the listbox.
    if (FindInt(nSel, pos) != TRUE)
        return;

    // Replace the integer in the CList<int,int>.
    GetDocument()->m_intList.SetAt(pos, m_int);

    // Update the old integer in the listbox by removing
    // the old entry and adding a new entry.
    m_ctlList.DeleteString(nSel);
    AddIntToListBox(m_int, nSel);
}

void CIntListView::OnRemove()
{
    int nSel;
    POSITION pos;
    // Find the string in both the CList<int,int> and in the listbox.
    if (FindInt(nSel, pos) != TRUE)
        return;


    // Remove the integer from the CList<int,int>.
    GetDocument()->m_intList.RemoveAt(pos);

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

void CIntListView::OnRemoveAll()
{
    // Remove all of the integers from the CList<int,int>.
    GetDocument()->m_intList.RemoveAll();

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

void CIntListView::OnSelChangeList()
{
    // Update the edit control to reflect the new selection
    // in the listbox.
    m_int = (int)m_ctlList.GetItemData(m_ctlList.GetCurSel());
    UpdateData(FALSE);
}