flickerview.cpp

Visual_C++[1].NET_Bible1 Visual_C++宝典书中的全部源码

// FlickerView.cpp : implementation of the CFlickerView class
//

#include "stdafx.h"
#include "Flicker.h"

#include "FlickerDoc.h"
#include "FlickerView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CFlickerView

IMPLEMENT_DYNCREATE(CFlickerView, CView)

BEGIN_MESSAGE_MAP(CFlickerView, CView)
	//{{AFX_MSG_MAP(CFlickerView)
	ON_WM_CREATE()
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFlickerView construction/destruction

CFlickerView::CFlickerView()
{
}

CFlickerView::~CFlickerView()
{
}

BOOL CFlickerView::PreCreateWindow(CREATESTRUCT& cs)
{
	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CFlickerView drawing

void CFlickerView::OnDraw(CDC* pDC)
{
	CFlickerDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	RECT Rect;
	GetClientRect( &Rect );

	static BOOL bColor = FALSE;

#define ALLOW_FLICKER

#ifdef ALLOW_FLICKER
	if( bColor )
		pDC->SelectStockObject( WHITE_PEN );
	else
		pDC->SelectStockObject( BLACK_PEN );
	bColor = !bColor;

	for( int i=0; i<Rect.right; i++ ){
		pDC->MoveTo( i, 0 );
		pDC->LineTo( i, Rect.bottom );
		}
#else
	CDC MemDC;
	MemDC.CreateCompatibleDC( pDC );

	CBitmap MemBitmap;
	MemBitmap.CreateCompatibleBitmap( pDC,
		Rect.right, Rect.bottom );

	CBitmap *pOldBitmap = MemDC.SelectObject( &MemBitmap );

	if( bColor )
		MemDC.SelectStockObject( WHITE_PEN );
	else
		MemDC.SelectStockObject( BLACK_PEN );
	bColor = !bColor;

	for( int i=0; i<Rect.right; i++ ){
		MemDC.MoveTo( i, 0 );
		MemDC.LineTo( i, Rect.bottom );
		}

	pDC->BitBlt( 0, 0, Rect.right, Rect.bottom,
		&MemDC, 0, 0, SRCCOPY );

	MemDC.SelectObject( pOldBitmap );
#endif

}

/////////////////////////////////////////////////////////////////////////////
// CFlickerView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CFlickerView message handlers

int CFlickerView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	SetTimer( 1, 1000, NULL );
	
	return 0;
}

void CFlickerView::OnTimer(UINT nIDEvent) 
{

	InvalidateRect( NULL, FALSE );
	UpdateWindow();
	
	CView::OnTimer(nIDEvent);
}