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

C/C++ Source or Header | 1998-04-03 | 4.8 KB | 216 lines

// ptarryvw.cpp : implementation file
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1995 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 "ptarryvw.h"
#include "resource.h"

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

/////////////////////////////////////////////////////////////////////////////
// CPointArrayView

IMPLEMENT_DYNCREATE(CPointArrayView, CFormView)

CPointArrayView::CPointArrayView()
    : CFormView(CPointArrayView::IDD)
{
    //{{AFX_DATA_INIT(CPointArrayView)
    m_x = 0;
    m_y = 0;
    //}}AFX_DATA_INIT
}

CPointArrayView::~CPointArrayView()
{
}

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

    // Copy all of the points from the document's CArray of CPoints
    // to the listbox.
    m_ctlList.ResetContent();
    IStlPointArrayPtr& ptArray = GetDocument()->m_ptArray;
    try {
    for (int nIndex = 0; nIndex < (int) ptArray->Count; nIndex++)
    {
        CPoint pt = ptArray->Array[nIndex];
        AddPointToListBox(pt);
    }
    } catch(_com_error& e) {
        dump_com_error(e);
    }
}


void CPointArrayView::DoDataExchange(CDataExchange* pDX)
{
    CFormView::DoDataExchange(pDX);
    //{{AFX_DATA_MAP(CPointArrayView)
    DDX_Control(pDX, IDC_LIST, m_ctlList);
    DDX_Text(pDX, IDC_X, m_x);
    DDX_Text(pDX, IDC_Y, m_y);
    //}}AFX_DATA_MAP
}


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



/////////////////////////////////////////////////////////////////////////////
// CPointArrayView diagnostics

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

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

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


/////////////////////////////////////////////////////////////////////////////
// CPointArrayView internal implementation

void CPointArrayView::AddPointToListBox(CPoint pt, int nSel)
{
    // Add new point to the listbox.
    CString str;
    str.Format(_T("(%i,%i)"), pt.x, pt.y);
    if (nSel == -1)
        nSel = m_ctlList.AddString(str);
    else
        m_ctlList.InsertString(nSel, str);
}


/////////////////////////////////////////////////////////////////////////////
// CPointArrayView message handlers

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

    // Add new point to the CList<int,int>
    CPoint pt(m_x, m_y);
    try {
    GetDocument()->m_ptArray->Add = pt;
    } catch(_com_error& e) {
        dump_com_error(e);
    }

    AddPointToListBox(pt);
}

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

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

    // Replace the point in the CArray of CPoints.
    CPoint pt(m_x, m_y);
    try {
    GetDocument()->m_ptArray->Array[nSel] = pt;
    } catch(_com_error& e) {
        dump_com_error(e);
    }

    // Update the old point in the listbox by removing
    // the old entry and adding a new entry.
    m_ctlList.DeleteString(nSel);
    AddPointToListBox(pt, nSel);
}

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

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

    try {
    // Remove the point from the CArray of CPoints..
    GetDocument()->m_ptArray->Remove[nSel];
    } catch(_com_error& e) {
        dump_com_error(e);
    }

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

void CPointArrayView::OnRemoveAll()
{
    try {
    // Remove all of the points from the CArray of CPoints.
    GetDocument()->m_ptArray->RemoveAll();
    } catch(_com_error& e) {
        dump_com_error(e);
    }

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

void CPointArrayView::OnSelChangeList()
{
    try {
    // Update the edit control to reflect the new selection
    // in the listbox.
    CPoint pt = GetDocument()->m_ptArray->Array[m_ctlList.GetCurSel()];

    m_x = pt.x;
    m_y = pt.y;
    UpdateData(FALSE);
    } catch(_com_error& e) {
        dump_com_error(e);
    }
}