childview.cpp

这些源代码

// ChildView.cpp : implementation of the CChildView class
//

#include "stdafx.h"
#include "Array.h"
#include "ChildView.h"
#include	<math.h>
#include	<afxtempl.h>

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

#define PI			3.14159

/////////////////////////////////////////////////////////////////////////////
// CChildView

CChildView::CChildView()
{
}

CChildView::~CChildView()
{
}


BEGIN_MESSAGE_MAP(CChildView,CWnd )
	//{{AFX_MSG_MAP(CChildView)
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CChildView message handlers

BOOL CChildView::PreCreateWindow(CREATESTRUCT& cs) 
{
	if (!CWnd::PreCreateWindow(cs))
		return FALSE;

	cs.dwExStyle |= WS_EX_CLIENTEDGE;
	cs.style &= ~WS_BORDER;
	cs.lpszClass = AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS, 
		::LoadCursor(NULL, IDC_ARROW), HBRUSH(COLOR_WINDOW+1), NULL);

	return TRUE;
}

void CChildView::OnPaint() 
{
RECT	rcClient;
CPoint	ptOrg;
CPoint	point;
CArray<CPoint, CPoint&> points;
double	fAngle, fRadius;
int 	i;
CPen	pen, *penOld;

	CPaintDC dc(this); // device context for painting
	pen.CreatePen (PS_SOLID, 2, (COLORREF) 0);
	penOld = (CPen *) dc.SelectObject (&pen);

	GetClientRect (&rcClient);
	fRadius = rcClient.bottom / 3.0;
	ptOrg = dc.SetViewportOrg (rcClient.right / 2, rcClient.bottom / 2);
	for (i = 0, fAngle = PI/2; i < 5; ++i, fAngle += 6 * PI/5.0)
	{
		point.x = (long)(fRadius * cos (fAngle) + 0.5);
		point.y = (long)(-fRadius * sin (fAngle) + 0.5);
		points.Add (CPoint (point.x, point.y));
	}
	points.Add (CPoint (points[0].x, points[0].y));
	dc.MoveTo (points[0].x, points[0].y);
	for (i = 1; i < 6; ++i)
		dc.LineTo (points[i].x, points[i].y);
	dc.SelectObject (penOld);
	dc.SetViewportOrg (ptOrg);
}