Tricks of the Windows Gam…ming Gurus (2nd Edition)/Disc2.iso/msdn_vcb/samples/vc98/com/allinone/collect/dwarryvw.cpp

C/C++ Source or Header | 1998-04-03 | 4.6 KB | 205 lines

// dwarryvw.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 "dwarryvw.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDWordArrayView

IMPLEMENT_DYNCREATE(CDWordArrayView, CFormView)

CDWordArrayView::CDWordArrayView()
    : CFormView(CDWordArrayView::IDD)
{
    //{{AFX_DATA_INIT(CDWordArrayView)
    m_dw = 0;
    //}}AFX_DATA_INIT
}

CDWordArrayView::~CDWordArrayView()
{
}

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

    // Copy all of the DWORDs from the document's CDWordArray
    // to the listbox.
    m_ctlList.ResetContent();
    IStlDWordArrayPtr& dwArray = GetDocument()->m_dwArray;
    try {
    for (int nIndex = 0; nIndex < (int) dwArray->Count; nIndex++)
    {
        DWORD dw = dwArray->Array[nIndex];
        CString str;
        str.Format(_T("%d"),dw);
        int nSel = m_ctlList.AddString(str);
    }
    } catch(_com_error& e) {
        dump_com_error(e);
    }
}

void CDWordArrayView::DoDataExchange(CDataExchange* pDX)
{
    CFormView::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CDWordArrayView)
    DDX_Control(pDX, IDC_LIST, m_ctlList);
    DDX_Text(pDX, IDC_DWORD, m_dw);
    //}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CDWordArrayView, CFormView)
    //{{AFX_MSG_MAP(CDWordArrayView)
    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)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()



/////////////////////////////////////////////////////////////////////////////
// CDWordArrayView diagnostics

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

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

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


/////////////////////////////////////////////////////////////////////////////
// CDWordArrayView message handlers

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

    try {
    // Add new DWORD to the CDWordArray
    GetDocument()->m_dwArray->Add = m_dw;

    // Add new DWORD to the listbox.
    CString str;
    str.Format(_T("%d"),m_dw);
    UINT nSel = m_ctlList.AddString(str) + 1;

    // The index of the new DWORD in the array should be the
    // same as the index of the new DWORD in the listbox.

    ASSERT(GetDocument()->m_dwArray->Count == nSel);
    } catch(_com_error& e) {
        dump_com_error(e);
    }
}

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

    int nSel = m_ctlList.GetCurSel();
    if (nSel == LB_ERR)
    {
        AfxMessageBox(IDS_SELECT_DWORD_TO_UPDATE);
        return;
    }

    try {
    // Replace the DWORD in the CDWordArray.
    GetDocument()->m_dwArray->Array[nSel] = m_dw;
    } catch(_com_error& e) {
        dump_com_error(e);
    }

    // Update the old DWORD in the listbox by removing
    // the old entry and adding a new entry.
    m_ctlList.DeleteString(nSel);
    CString str;
    str.Format(_T("%d"),m_dw);
    m_ctlList.InsertString(nSel, str);
}

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

    int nSel = m_ctlList.GetCurSel();
    if (nSel == LB_ERR)
    {
        AfxMessageBox(IDS_SELECT_DWORD_TO_REMOVE);
        return;
    }

    try {
    // Remove the DWORD from the CDWordArray.
    GetDocument()->m_dwArray->Remove[nSel];
    } catch(_com_error& e) {
        dump_com_error(e);
    }

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

void CDWordArrayView::OnRemoveAll()
{
    try {
    // Remove all of the DWORDs from the CDWordArray.
    GetDocument()->m_dwArray->RemoveAll();
    } catch(_com_error& e) {
        dump_com_error(e);
    }

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

void CDWordArrayView::OnSelChangeList()
{
    try {
    // Update the edit control to reflect the new selection
    // in the listbox.
    m_dw = GetDocument()->m_dwArray->Array[m_ctlList.GetCurSel()];
    } catch(_com_error& e) {
        dump_com_error(e);
    }

    UpdateData(FALSE);
}