counterdlg.cpp

通过多媒体定时器

// CounterDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Counter.h"
#include "CounterDlg.h"
#include <Mmsystem.h>

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

/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About

class CAboutDlg : public CDialog
{
public:
	CAboutDlg();

// Dialog Data
	//{{AFX_DATA(CAboutDlg)
	enum { IDD = IDD_ABOUTBOX };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CAboutDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	//{{AFX_MSG(CAboutDlg)
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
	//{{AFX_DATA_INIT(CAboutDlg)
	//}}AFX_DATA_INIT
}

void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAboutDlg)
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
	//{{AFX_MSG_MAP(CAboutDlg)
		// No message handlers
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCounterDlg dialog

CCounterDlg::CCounterDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCounterDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCounterDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	m_nCount=0;
	
	TIMECAPS tc;  
	//利用函数timeGetDevCaps取出系统分辨率的取值范围，如果无错则继续  
	if(timeGetDevCaps(&tc,sizeof(TIMECAPS))==TIMERR_NOERROR)  
	{  
		//获得本系统的最小定时器分辨率，所有应用必须大于等于该分辨率  
		wAccuracy=min(max(tc.wPeriodMin,1),tc.wPeriodMax);  
		//设定本应用的所需的定时器分辨率，本例为微机的所允许的最大分辨率
		timeBeginPeriod(wAccuracy);  
	}		
}

void CCounterDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CCounterDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CCounterDlg, CDialog)
	//{{AFX_MSG_MAP(CCounterDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON1, OnButton1)
	ON_BN_CLICKED(IDC_BUTTON2, OnButton2)
	ON_BN_CLICKED(IDC_BUTTON3, OnButton3)
	ON_WM_DESTROY()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCounterDlg message handlers

BOOL CCounterDlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	// Add "About..." menu item to system menu.

	// IDM_ABOUTBOX must be in the system command range.
	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
	ASSERT(IDM_ABOUTBOX < 0xF000);

	CMenu* pSysMenu = GetSystemMenu(FALSE);
	if (pSysMenu != NULL)
	{
		CString strAboutMenu;
		strAboutMenu.LoadString(IDS_ABOUTBOX);
		if (!strAboutMenu.IsEmpty())
		{
			pSysMenu->AppendMenu(MF_SEPARATOR);
			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
		}
	}

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon
	
	// TODO: Add extra initialization here
	
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CCounterDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
	if ((nID & 0xFFF0) == IDM_ABOUTBOX)
	{
		CAboutDlg dlgAbout;
		dlgAbout.DoModal();
	}
	else
	{
		CDialog::OnSysCommand(nID, lParam);
	}
}

// If you add a minimize button to your dialog, you will need the code below
//  to draw the icon.  For MFC applications using the document/view model,
//  this is automatically done for you by the framework.

void CCounterDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // device context for painting

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		// Center icon in client rectangle
		int cxIcon = GetSystemMetrics(SM_CXICON);
		int cyIcon = GetSystemMetrics(SM_CYICON);
		CRect rect;
		GetClientRect(&rect);
		int x = (rect.Width() - cxIcon + 1) / 2;
		int y = (rect.Height() - cyIcon + 1) / 2;

		// Draw the icon
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

// The system calls this to obtain the cursor to display while the user drags
//  the minimized window.
HCURSOR CCounterDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}


void CCounterDlg::OnButton1() 
{
	// TODO: Add your control notification handler code here
	int nStart=GetTickCount();
	Sleep(1000);
	int nEnd=GetTickCount();
	int nTotal=nEnd-nStart;
	CString str;
	str.Format("%d",nTotal);
	AfxMessageBox(str);
}

void CCounterDlg::OnButton2() 
{
	// TODO: Add your control notification handler code here
	LARGE_INTEGER litmp; 
	LONGLONG QPart1,QPart2; 
	double dfMinus, dfFreq, dfTim; 
	QueryPerformanceFrequency(&litmp); 
	// 获得计数器的时钟频率 
	dfFreq = (double)litmp.QuadPart; 
	QueryPerformanceCounter(&litmp); 
	// 获得初始值 
	QPart1 = litmp.QuadPart; 
	Sleep(1000); 
	QueryPerformanceCounter(&litmp); 
	// 获得中止值 
	QPart2 = litmp.QuadPart; 
	dfMinus = (double)(QPart2-QPart1); 
	dfTim = dfMinus/dfFreq;
	CString str;
	str.Format("%f",dfTim);
	AfxMessageBox(str);
}
//多媒体定时器
void CCounterDlg::OnButton3() 
{
	TimerID=timeSetEvent(2000,wAccuracy,MyMMTimer,(DWORD)this,TIME_ONESHOT);
}
void CCounterDlg::MyMMTimer(UINT wTimerID,UINT nMsg,DWORD dwUser,DWORD dw1,DWORD dw2)
{
	CCounterDlg* pDlg=(CCounterDlg*)dwUser;
	pDlg->ShowMessage();
}

void CCounterDlg::ShowMessage()
{
	CString str;
	str="luxintian";
	AfxMessageBox(str);
}

void CCounterDlg::OnDestroy() 
{
	CDialog::OnDestroy();
	
	// TODO: Add your message handler code here
	timeKillEvent(TimerID); 
	timeEndPeriod(wAccuracy); 	
}