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

C/C++ Source or Header | 1998-03-26 | 5KB | 208 lines

// typaryvw.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 "typaryvw.h"
#include "resource.h"

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

/////////////////////////////////////////////////////////////////////////////
// CTypedPtrArrayView

IMPLEMENT_DYNCREATE(CTypedPtrArrayView, CFormView)

CTypedPtrArrayView::CTypedPtrArrayView()
    : CFormView(CTypedPtrArrayView::IDD)
{
    //{{AFX_DATA_INIT(CTypedPtrArrayView)
    m_int = 0;
    m_float = 0.0f;
    m_str = "";
    //}}AFX_DATA_INIT
}

CTypedPtrArrayView::~CTypedPtrArrayView()
{
}

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

    // Copy all of the entries from the document's CTypedPtrArray
    // to the listbox.
    m_ctlList.ResetContent();
    CMyObjectArray& myobArray = GetDocument()->m_myobArray;
    for (int nIndex = 0; nIndex < myobArray.GetSize(); nIndex++)
    {
        CMyObject* pMyObject = myobArray[nIndex];
        AddMyObjectToListBox(pMyObject);
    }
}

void CTypedPtrArrayView::DoDataExchange(CDataExchange* pDX)
{
    CFormView::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CTypedPtrArrayView)
    DDX_Control(pDX, IDC_LIST, m_ctlList);
    DDX_Text(pDX, IDC_INT, m_int);
    DDX_Text(pDX, IDC_FLOAT, m_float);
    DDX_Text(pDX, IDC_STRING, m_str);
    //}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CTypedPtrArrayView, CFormView)
    //{{AFX_MSG_MAP(CTypedPtrArrayView)
    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()



/////////////////////////////////////////////////////////////////////////////
// CTypedPtrArrayView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CmyobArrayView internal implementation

void CTypedPtrArrayView::AddMyObjectToListBox(CMyObject* pMyObject,
    int nSel)
{
    // Add new CMyObject to the listbox.
    CString str;
    pMyObject->FormatMyObject(str);
    if (nSel == -1)
        nSel = m_ctlList.AddString(str);
    else
        m_ctlList.InsertString(nSel, str);
}


/////////////////////////////////////////////////////////////////////////////
// CTypedPtrArrayView message handlers

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

    // Add new CMyObject to the CTypedPtrArray
    CMyObject* pMyObject = new CMyObject;
    pMyObject->m_int = m_int;
    pMyObject->m_float = m_float;
    pMyObject->m_str = m_str;
    GetDocument()->m_myobArray.Add(pMyObject);

    AddMyObjectToListBox(pMyObject);
}

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

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

    CMyObject* pMyObject = GetDocument()->m_myobArray[nSel];

    // Replace the value of the CMyObject in the CTypedPtrArray.
    pMyObject->m_int = m_int;
    pMyObject->m_float = m_float;
    pMyObject->m_str = m_str;

    // Replace the displayed CMyObject in the listbox by removing
    // the old listbox entry and adding a new entry.
    m_ctlList.DeleteString(nSel);
    AddMyObjectToListBox(pMyObject, nSel);
}

void CTypedPtrArrayView::OnRemove()
{
    int nSel = m_ctlList.GetCurSel();
    if (nSel == LB_ERR)
    {
        AfxMessageBox(IDS_SELECT_ENTRY_TO_BE_REMOVED);
        return;
    }

    CMyObject* pMyObject = GetDocument()->m_myobArray[nSel];

    // Remove the CMyObject ptr from the CTypedPtrArray.
    GetDocument()->m_myobArray.RemoveAt(nSel);

    // Delete the CMyObject object. (The CTypedPtrArray only holds the ptr.)
    delete pMyObject;

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

void CTypedPtrArrayView::OnRemoveAll()
{
    CCollectDoc* pDoc = GetDocument();
    for (int n = 0; n < pDoc->m_myobArray.GetSize(); n++)
    {
        delete pDoc->m_myobArray[n];
    }
    pDoc->m_myobArray.RemoveAll();

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

void CTypedPtrArrayView::OnSelChangeList()
{
    // Update the edit control to reflect the new selection
    // in the listbox.
    int nSel = m_ctlList.GetCurSel();
    CMyObject* pMyObject = GetDocument()->m_myobArray[nSel];

    m_int = pMyObject->m_int;
    m_float = pMyObject->m_float;
    m_str = pMyObject->m_str;

    UpdateData(FALSE);
}