Fast Track Visual C++ 6.0 Programming
(Publisher: John Wiley & Sons, Inc.)
Author(s): Steve Holzner
ISBN: 0471312908
Publication Date: 09/01/98

Listing 4.3 ComboView.h and ComboView.cpp

// ComboView.h : interface of the CComboView class
//
/////////////////////////////////////////////////////////////////////////////

#if
!defined(AFX_COMBOVIEW_H__D36DAA6D_9E10_11D1_887F_D42B07C10710__INCLUDED_)
#define AFX_COMBOVIEW_H__D36DAA6D_9E10_11D1_887F_D42B07C10710__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

class CComboView : public CView
{
protected: // create from serialization only
    CComboView();
    DECLARE_DYNCREATE(CComboView)
    int m_FigureType;

// Attributes
public:
    CComboDoc* GetDocument();

// Operations
public:

// Overrides
    // ClassWizard generated virtual function overrides
    //{{AFX_VIRTUAL(CComboView)
    public:
    virtual void OnDraw(CDC* pDC);  // overridden to draw this view
    virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
    protected:
    virtual BOOL OnPreparePrinting(CPrintInfo* pInfo);
    virtual void OnBeginPrinting(CDC* pDC, CPrintInfo* pInfo);
    virtual void OnEndPrinting(CDC* pDC, CPrintInfo* pInfo);
    //}}AFX_VIRTUAL

// Implementation
public:
    virtual ~CComboView();
#ifdef _DEBUG
    virtual void AssertValid() const;
    virtual void Dump(CDumpContext& dc) const;
#endif

protected:

// Generated message map functions
protected:
    //{{AFX_MSG(CComboView)
    afx_msg void OnDrawFigure();
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()
};

#ifndef _DEBUG  // debug version in ComboView.cpp
inline CComboDoc* CComboView::GetDocument()
   { return (CComboDoc*)m_pDocument; }
#endif

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_COMBOVIEW_H__D36DAA6D_9E10_11D1_887F_D42B07C10710__INCLUDED_)

// ComboView.cpp : implementation of the CComboView class
//

#include “stdafx.h”
#include “Combo.h”
#include “MainFrm.h”

#include “ComboDoc.h”
#include “ComboView.h”

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


/////////////////////////////////////////////////////////////////////////////
// CComboView

IMPLEMENT_DYNCREATE(CComboView, CView)

BEGIN_MESSAGE_MAP(CComboView, CView)
    //{{AFX_MSG_MAP(CComboView)
    ON_COMMAND(ID_DRAW, OnDrawFigure)
    //}}AFX_MSG_MAP
    // Standard printing commands
    ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
    ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
    ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CComboView construction/destruction

CComboView::CComboView()
{
    m_FigureType = 0;

    // TODO: add construction code here
}

CComboView::~CComboView()
{
}

BOOL CComboView::PreCreateWindow(CREATESTRUCT& cs)
{
    // TODO: Modify the Window class or styles here by modifying
    //  the CREATESTRUCT cs

    return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CComboView drawing

void CComboView::OnDraw(CDC* pDC)
{
    CComboDoc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);

    switch(m_FigureType){

    case 0:
     pDC->Ellipse(200, 50, 400, 250);
     break;
    case 1:
     pDC->Rectangle(200, 50, 400, 250);
     break;
    case 2:
     pDC->RoundRect(200, 50, 400, 250, 20, 20);
     break;
    }
    // TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CComboView printing

BOOL CComboView::OnPreparePrinting(CPrintInfo* pInfo)
{
    // default preparation
    return DoPreparePrinting(pInfo);
}

void CComboView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
    // TODO: add extra initialization before printing
}

void CComboView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
    // TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CComboView diagnostics

#ifdef _DEBUG
void CComboView::AssertValid() const
{
    CView::AssertValid();
}

void CComboView::Dump(CDumpContext& dc) const
{
    CView::Dump(dc);
}

CComboDoc* CComboView::GetDocument() // non-debug version is inline
{
    ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CComboDoc)));
    return (CComboDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CComboView message handlers

void CComboView::OnDrawFigure()
{
    m_FigureType = ((CMainFrame*) GetParent())->GetItemNumber();
    Invalidate();
    // TODO: Add your command handler code here

}

What’s Ahead

In the next chapter, we forge ahead, bringing together what we’ve seen in the last few chapters as we build a real-world application. As we dig deeper into more advanced topics, many new topics, from file handling to working with the clipboard, will come up.