lines.cpp

VC源代码大全（精华版）

			if (ptLast.x >= 0)
			{
				DoMouseLine (hdc, ptLast, point, color);
			}
			ReleaseDC (hWnd, hdc);
			ptLast = point;
			break;
		case WM_MOUSEMOVE:
			if (nFlags & MK_RBUTTON)
			{
				DoMouseEvent (hWnd, WM_RBUTTONDOWN, nFlags, point, color);
				break;
			}
			if (!(nFlags & MK_LBUTTON))
				return;
			if (bTracking)
			{
				POINT pt;
				pt = point;
				hdc = GetDC (hWnd);
				DoMouseLine (hdc, ptLineStart, ptLineEnd, color);
				DoMouseLine (hdc, ptLineStart, pt, color);
				ReleaseDC (hWnd, hdc);
			}
			ptLineEnd = point;
			bTracking = true;
			break;
	}
}

void DoMouseLine (HDC hdc, POINT & ptLineStart, POINT & ptLineEnd, COLORREF color)
{
HPEN	hOldPen;

	HPEN hPen = CreatePen (PS_SOLID, 2, color ^ 0x00ffffff);
	int nOldMode = SetROP2 (hdc, R2_XORPEN);// R2_NOT);
	MoveToEx (hdc, ptLineStart.x, ptLineStart.y, NULL);
	hOldPen = (HPEN) SelectObject (hdc, hPen);
	LineTo (hdc, ptLineEnd.x, ptLineEnd.y);
	SetROP2 (hdc, nOldMode);
	SelectObject (hdc, hOldPen);
	DeleteObject (hPen);
}

void DoPolyLine (HWND hWnd, HDC hdc, bool bMenuClicked)
{
RECT	rcClient;
POINT	*pPoint;
POINT	pOldOrigin;
LOGFONT	lf;
HPEN	hOldPen, hPen;
HBRUSH	hOldBrush, hBrush;
HFONT	hFont, hOldFont;
double	fAngle, fRadius;
int		nStartAt;

	if (bMenuClicked)
		nStartAt = 2;
	else
		nStartAt = 50;

	hPen = CreatePen (PS_SOLID, 2, 0x0);
	hOldPen = (HPEN) SelectObject (hdc, hPen);
	hBrush = CreateSolidBrush (0x00ffffff);
	hOldBrush = (HBRUSH) SelectObject (hdc, hBrush);
	GetClientRect (hWnd, &rcClient);

	CreateLogFont (hdc, lf, 14);
	hFont = CreateFontIndirect (&lf);
	hOldFont = (HFONT) SelectObject (hdc, hFont);
//
//	Try it changing the viewport. Comment out the line below and
//	uncomment the following line. Also uncomment the two lines
//	at the bottom of the function.
//
	SetViewportOrgEx (hdc, rcClient.right / 2, rcClient.bottom / 2, &pOldOrigin);
//	SetViewportOrgEx (hdc, rcClient.right / 4, rcClient.bottom / 2, &pOldOrigin);

	fRadius = rcClient.bottom / 3;
	RECT newClient;
	RECT rcText;
	newClient.left = -rcClient.right / 2;
	newClient.right = rcClient.right / 2;
	newClient.top = -rcClient.bottom / 2;
	newClient.bottom = rcClient.bottom / 2;

	rcText.left = -rcClient.bottom / 5;
	rcText.right = -rcText.left;
	rcText.top = -lf.lfHeight / 2;
	rcText.bottom = - rcText.top;

	for (int cSides = nStartAt; cSides < 51; ++cSides)
	{
		FillRect (hdc, &newClient, hBrush);
		fAngle = PI / 2;
		pPoint = new POINT[cSides + 1];
		for (int i = 0; i < cSides; ++i)
		{
			pPoint[i].x = (long) (fRadius * cos (fAngle) + 0.5);
			pPoint[i].y = (long) (-fRadius * sin (fAngle) + 0.5);
			fAngle += 2 * PI / cSides;
		}
		pPoint[cSides] = pPoint[0];
		Polyline (hdc, pPoint, cSides + 1);
		delete [] pPoint;
		if (i > 2)
		{
			char strText [_MAX_PATH];
			sprintf (strText, "Sides = %d", i);
			DrawText (hdc, strText, strlen (strText), &rcText, TEXT_FORMAT);
		}
		Sleep (300);
	}
//	SetViewportOrgEx (hdc, 3 * rcClient.right / 4, rcClient.bottom / 2, NULL);
//	Ellipse (hdc, (int) -fRadius, (int) -fRadius, (int) fRadius, (int) fRadius);

	SelectObject (hdc, hOldPen);
	SelectObject (hdc, hOldBrush);
	SelectObject (hdc, hOldFont);
	DeleteObject (hFont);
	DeleteObject (hPen);
	DeleteObject (hBrush);
	SetViewportOrgEx (hdc, pOldOrigin.x, pOldOrigin.y, NULL);
}

void DoArc (HWND hWnd, HDC hdc)
{
POINT	ptOldOrigin;
POINT	ptStart, ptEnd;
HPEN	hPen, hOldPen;
HBRUSH	hBrush, hOldBrush;
RECT	rcClient;
double	fAngle, fRadius;

	hBrush = CreateSolidBrush (0x00ffffff);
	hOldBrush = (HBRUSH) SelectObject (hdc, hBrush);

	hPen = CreatePen (PS_SOLID, 2, 0x0);
	hOldPen = (HPEN) SelectObject (hdc, hPen);
	GetClientRect (hWnd, &rcClient);
	SetViewportOrgEx (hdc, rcClient.right / 2, rcClient.bottom / 2, &ptOldOrigin);
	ptEnd.x = 150;
	ptEnd.y = 0;
	fAngle = (2 * PI) / 5;
	fRadius = 150.0;
	RECT rcCircle = {-150, -150, 150, 150};
	for (int i = 0; i < 10; ++i)
	{
		if (i == 5)
		{
			ptEnd.x = 150;
			ptEnd.y = 0;
			fAngle = (2 * PI) / 5;
		}
		ptStart = ptEnd;
		ptEnd.x = (long) (fRadius * cos (fAngle) + 0.5);
		ptEnd.y = (long) (-fRadius * sin (fAngle) + 0.5);
		Arc (hdc, -150, -150, 150, 150, ptStart.x, ptStart.y, ptEnd.x, ptEnd.y);
		fAngle += (2 * PI) / 5;
		if (i < 5)
		{
			Sleep (300);
			FillRect (hdc, &rcCircle, hBrush);
		}
	}
	SetViewportOrgEx (hdc, ptOldOrigin.x, ptOldOrigin.y, NULL);
	SelectObject (hdc, hOldPen);
	SelectObject (hdc, hOldBrush);
}

void CreateLogFont (HDC hdc, LOGFONT & lf, int nPoints, char *szFace)
{
	memset (&lf, '\0', sizeof (LOGFONT));
	lf.lfCharSet = DEFAULT_CHARSET;
	lf.lfClipPrecision = OUT_TT_PRECIS;
	lf.lfQuality = DEFAULT_QUALITY;
	lf.lfPitchAndFamily = DEFAULT_PITCH | FF_ROMAN;
	lf.lfHeight = MulDiv(nPoints, GetDeviceCaps(hdc, LOGPIXELSY), 72);
	strcpy (lf.lfFaceName, szFace);
}

void DoPieChart (HWND hWnd, HDC hdc)
{
RECT    rcClient;
POINT   pOldOrigin;
POINT   pPoint[6];
//int nVals[] = {72, 156, 108, 84, 276};
int nVals[] = {72, 16, 148, 84, 276};
int     nSum, i;
HBRUSH  hBrush[5], hOldBrush;
HPEN    hPen, hOldPen;
double  fAngle, fRadius;
COLORREF crColors[] = {0x00ffff00, 0x00ff00ff, 0x001111ff,
                       0x0000ffff, 0x0011ff11};

    GetClientRect (hWnd, &rcClient);
    fRadius = rcClient.bottom / 3;
    fAngle = PI / 4;
    hBrush[0] = CreateSolidBrush (0x0);
    SetViewportOrgEx (hdc, rcClient.right / 4 + 6,
                      rcClient.bottom / 2 + 6, &pOldOrigin);
    hOldBrush = (HBRUSH) SelectObject (hdc, hBrush[0]);
    hPen = CreatePen (PS_SOLID, 2, 0);
    hOldPen = (HPEN) SelectObject (hdc, hPen);
    Ellipse (hdc, (int) -fRadius, (int) -fRadius,
                  (int) fRadius, (int) fRadius);
    SelectObject (hdc, hOldBrush);
    DeleteObject (hBrush[0]);
    SetViewportOrgEx (hdc, rcClient.right / 4,
                           rcClient.bottom / 2, NULL);

    nSum = 0;
    for (i = 0; i < 5; ++i)
    {
        hBrush[i] = CreateSolidBrush (crColors[i]);
        nSum += nVals[i];
    }
    hPen = CreatePen (PS_SOLID, 2, 0);
    hOldPen = (HPEN) SelectObject (hdc, hPen);
    hOldBrush = (HBRUSH) SelectObject (hdc, hBrush[0]);
    for (i = 0; i < 5; ++i)
    {
        pPoint[i].x = (long)(fRadius * cos (fAngle) + 0.5);
        pPoint[i].y = (long)(-fRadius * sin (fAngle) + 0.5);
        fAngle += (nVals[i] * 2.0 * PI) / nSum;
    }
    pPoint[5] = pPoint[0];
    for (i = 0; i < 5; ++i)
    {
        SelectObject (hdc, hBrush[i]);
        Pie (hdc, (int) -fRadius, (int) -fRadius,
                  (int) fRadius, (int) fRadius,
                  pPoint[i].x, pPoint[i].y,
                  pPoint[i+1].x, pPoint[i+1].y);
        SelectObject (hdc, hOldBrush);
        DeleteObject (hBrush[i]);
    }
    SelectObject (hdc, hOldPen);
    DeleteObject (hPen);
    SetViewportOrgEx(hdc, pOldOrigin.x, pOldOrigin.y, NULL);
}


void DoPieChart2 (HWND hWnd, HDC hdc)
{
RECT	rcClient;
POINT	pOldOrigin;
POINT	pPoint[6];
POINT	ptCenter;
POINT   pExplodePoint[6];
POINT   pShadowPoint[6];
int nVals[] = {72, 156, 108, 84, 276};
int	nSum, i;
HBRUSH	hBrush[5], hOldBrush, hbrBlack;
HPEN	hPen, hOldPen;
double	fAngle, fRadius;
double	fExplodeAngle, fExplodeRadius;
double	fShadowRadius;
COLORREF	crColors[] = {0x00ffff00, 0x00ff00ff, 0x001111ff,
						  0x0000ffff, 0x0011ff11};

	GetClientRect (hWnd, &rcClient);
	ptCenter.x = rcClient.right / 4;
	ptCenter.y = rcClient.bottom / 2;
	SetViewportOrgEx (hdc, ptCenter.x, ptCenter.y, &pOldOrigin);
	hbrBlack = CreateSolidBrush (0x00777777);
	hOldBrush = (HBRUSH) SelectObject (hdc, hbrBlack);
    hPen = CreatePen (PS_SOLID, 2, 0);
    hOldPen = (HPEN) SelectObject (hdc, hPen);

	fRadius = rcClient.bottom / 3;
	fExplodeRadius = 10;
	fShadowRadius = 5;
	fAngle = PI / 4;

	SetViewportOrgEx (hdc, rcClient.right / 4 + 4, rcClient.bottom / 2 + 4, &pOldOrigin);
	Ellipse (hdc, (int)(-fRadius) + 12, (int) -fRadius + 12, (int) fRadius + 12, (int) fRadius + 12);
	SelectObject (hdc, hOldBrush);
	DeleteObject (hbrBlack);
	hbrBlack = CreateSolidBrush (0x0);
	SelectObject (hdc, hbrBlack);
	SetViewportOrgEx (hdc, rcClient.right / 4, rcClient.bottom / 2, NULL);
	nSum = 0;
	for (i = 0; i < 5; ++i)
	{
		hBrush[i] = CreateSolidBrush (crColors[i]);
		nSum += nVals[i];
	}
	for (i = 0; i < 5; ++i)
	{
		pPoint[i].x = (long) (fRadius * cos (fAngle) + 0.5);
		pPoint[i].y = (long) (-fRadius * sin (fAngle) + 0.5);
		fExplodeAngle = fAngle;
		fAngle += (nVals[i] * 2.0 * PI) / nSum;
		fExplodeAngle += (nVals[i] * 2.0 * PI) / (nSum * 2.0);
		pExplodePoint[i].x = (long) (fExplodeRadius * cos (fExplodeAngle) + 0.5);
		pExplodePoint[i].y = (long) (-fExplodeRadius * sin (fExplodeAngle) + 0.5);
		pShadowPoint[i].x = abs((int)(long) (fShadowRadius * cos (fExplodeAngle) + 0.5));
		pShadowPoint[i].y = abs ((int)(long) (-fShadowRadius * sin (fExplodeAngle) + 0.5));
	}
	pPoint[5] = pPoint[0];

	for (i = 0; i < 5; ++i)
	{
//		SelectObject (hdc, hbrBlack);
//		SetViewportOrgEx (hdc, ptCenter.x + pShadowPoint[i].x + pExplodePoint[i].x, ptCenter.y +pShadowPoint[i].y + pExplodePoint[i].x, NULL);
//		Pie (hdc, (int) -fRadius, (int) -fRadius, (int) fRadius, (int) fRadius, pPoint[i].x, pPoint[i].y, pPoint[i+1].x, pPoint[i+1].y);

		SetViewportOrgEx (hdc, ptCenter.x + pExplodePoint[i].x, ptCenter.y +pExplodePoint[i].y, NULL);
//		Pie (hdc, (int) -fRadius, (int) -fRadius, (int) fRadius, (int) fRadius, pPoint[i].x, pPoint[i].y, pPoint[i+1].x, pPoint[i+1].y);
		SelectObject (hdc, hBrush[i]);
		Pie (hdc, (int) -fRadius, (int) -fRadius, (int) fRadius, (int) fRadius, pPoint[i].x, pPoint[i].y, pPoint[i+1].x, pPoint[i+1].y);
		SetViewportOrgEx (hdc, ptCenter.x, ptCenter.y, NULL);
		SelectObject (hdc, hOldBrush);
		DeleteObject (hBrush[i]);
	}
	SelectObject (hdc, hOldPen);
	DeleteObject (hbrBlack);
	SetViewportOrgEx (hdc, pOldOrigin.x, pOldOrigin.y, NULL);
}