InvalidateRect cpu占用率过高问题求助

gdboyi 2013-08-27 07:53:47

图上那部分曲线只用用Invalidata()才能刷出来，但是CPU使用率能达到100%，有没有降低的方法呢

void CRamanDlg::OnPaint()

{

	CRect		rectClient, rectTemp;

	CBitmap		bitmapTemp, *pOldBitmap;

	CDC			dcMem;

	CString strXcoordinate;

	CString str;

	CPaintDC	dc(this);

	CPoint ptStart1,ptEnd1,ptStart2,ptEnd2;

	

	//Get client dailog Rectangle szie 

	GetClientRect(rectClient);



	//create bitmap memory source

	bitmapTemp.CreateCompatibleBitmap(&dc, rectClient.Width(), rectClient.Height());

	dcMem.CreateCompatibleDC(&dc);//create compatible with dc 

	pOldBitmap	= dcMem.SelectObject(&bitmapTemp);

	dcMem.FillSolidRect(rectClient, RGB(0, 0, 0)); 

	

	//get the border size

	rectTemp.top	= rectClient.top+30;

	rectTemp.bottom	= rectClient.bottom-40;

	rectTemp.left	= rectClient.left+130;

	rectTemp.right	= rectClient.right-25;

	//设置坐标点

	ptStart1.SetPoint(m_ptSx,rectTemp.top);

	ptEnd1.SetPoint(m_ptSx,rectTemp.bottom);



	ptStart2.SetPoint(m_ptEx,rectTemp.top);

	ptEnd2.SetPoint(m_ptEx,rectTemp.bottom);

	

	DrawCoordinate(&dcMem, rectTemp);

	DrawSpectrum(&dcMem, rectTemp);

	

	DrawLine(&dcMem,ptStart1,ptEnd1);

	DrawLine(&dcMem,ptStart2,ptEnd2);

	dc.BitBlt(0, 0, rectClient.Width(), rectClient.Height(), &dcMem, 0, 0, SRCCOPY);



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

	GetMarkValue();

	

	CString pty;

	pty.Format(L"当前值:%.2f",m_Mark1);

	//pty = L"当前值:"+pty;

	dc.SetBkMode(TRANSPARENT);

	dc.SetTextColor(RGB(255,0,0));

	dc.ExtTextOut(rectClient.left+120,rectClient.top+245,ETO_CLIPPED,CRect(rectClient.left+120,rectClient.top+220,rectClient.left+270,rectClient.top+260),pty,NULL);//Set the coordinate disp pace



	str.Format(L"平均值:%.2f",m_Mark2);

	dc.SetBkMode(TRANSPARENT);

	dc.SetTextColor(RGB(255,0,0));

	dc.ExtTextOut(rectClient.left+10,rectClient.top+245,ETO_CLIPPED,CRect(rectClient.left+10,rectClient.top+220,rectClient.left+100,rectClient.top+260),str,NULL);



	dcMem.SelectObject(pOldBitmap);

	m_rectClient = rectClient;

	

	strXcoordinate.Format(m_DispXUint);

	dc.SetBkMode(TRANSPARENT);

	dc.SetTextColor(RGB(0,0,255));

	dc.ExtTextOut(rectClient.left+220,rectClient.top+245,ETO_CLIPPED,CRect(rectClient.left+220,rectClient.top+220,rectClient.left+360,rectClient.top+260),strXcoordinate,NULL);



	CEdit *Rev_Text = (CEdit *)GetDlgItem(IDC_EDIT_REV);

	Rev_Text->SetWindowText(m_strRecvData);

	

	dcMem.DeleteDC();

	InvalidateRect(rectClient,FALSE);

}