sparetime.cpp

这个是我们学校用的VC++教案

// SpareTime.cpp : Defines the class behaviors for the application.
//

#include "stdafx.h"
#include "SpareTime.h"

#include "MainFrm.h"
#include "SpareTimeDoc.h"
#include "SpareTimeView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CSpareTimeApp

BEGIN_MESSAGE_MAP(CSpareTimeApp, CWinApp)
	//{{AFX_MSG_MAP(CSpareTimeApp)
	ON_COMMAND(ID_APP_ABOUT, OnAppAbout)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code!
	//}}AFX_MSG_MAP
	// Standard file based document commands
	ON_COMMAND(ID_FILE_NEW, CWinApp::OnFileNew)
	ON_COMMAND(ID_FILE_OPEN, CWinApp::OnFileOpen)
	// Standard print setup command
	ON_COMMAND(ID_FILE_PRINT_SETUP, CWinApp::OnFilePrintSetup)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSpareTimeApp construction

CSpareTimeApp::CSpareTimeApp() : dwTotal(0), dwIdle(0)  {  }

/////////////////////////////////////////////////////////////////////////////
// The one and only CSpareTimeApp object

CSpareTimeApp theApp;

/////////////////////////////////////////////////////////////////////////////
// CSpareTimeApp initialization

BOOL CSpareTimeApp::InitInstance()
{
	AfxEnableControlContainer();

	// Standard initialization
	// If you are not using these features and wish to reduce the size
	//  of your final executable, you should remove from the following
	//  the specific initialization routines you do not need.

#ifdef _AFXDLL
	Enable3dControls();			// Call this when using MFC in a shared DLL
#else
	Enable3dControlsStatic();	// Call this when linking to MFC statically
#endif

	// Change the registry key under which our settings are stored.
	// TODO: You should modify this string to be something appropriate
	// such as the name of your company or organization.
	SetRegistryKey(_T("Local AppWizard-Generated Applications"));

	LoadStdProfileSettings();  // Load standard INI file options (including MRU)

	// Register the application's document templates.  Document templates
	//  serve as the connection between documents, frame windows and views.

	CSingleDocTemplate* pDocTemplate;
	pDocTemplate = new CSingleDocTemplate(
		IDR_MAINFRAME,
		RUNTIME_CLASS(CSpareTimeDoc),
		RUNTIME_CLASS(CMainFrame),       // main SDI frame window
		RUNTIME_CLASS(CSpareTimeView));
	AddDocTemplate(pDocTemplate);

	// Parse command line for standard shell commands, DDE, file open
	CCommandLineInfo cmdInfo;
	ParseCommandLine(cmdInfo);

	// Dispatch commands specified on the command line
	if (!ProcessShellCommand(cmdInfo))
		return FALSE;

	// The one and only window has been initialized, so show and update it.
	m_pMainWnd->ShowWindow(SW_SHOW);
	m_pMainWnd->UpdateWindow();

	return TRUE;
}


/////////////////////////////////////////////////////////////////////////////
// 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)
		// No message handlers
	//}}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()

// App command to run the dialog
void CSpareTimeApp::OnAppAbout()
{
	CAboutDlg aboutDlg;
	aboutDlg.DoModal();
}

/////////////////////////////////////////////////////////////////////////////
// CSpareTimeApp message handlers


BOOL CSpareTimeApp::OnIdle(LONG lCount) 
{
	// TODO: Add your specialized code here and/or call the base class
	if(dwTotal==0)  // 第一次调用OnIdle()函数
		dwFirst=GetTickCount();  // 调用时间库函数获得系统已运行的时间
	DWORD  dwTemp=GetTickCount();
	dwTotal=dwTemp-dwFirst;  // 计算程序总的运行时间
	if(dwTotal==0) dwTotal++;  // 防止开始调用函数时造成dwTotal等于0
	if(lCount!=0)    // 在两次调用OnIdle()函数之间没有处理消息
		dwIdle+=dwTemp-dwLast;  // 累加所有的空闲时间
	dwLast= dwTemp;  // 保存当前调用OnIdle()函数的时间，用于下一次计算空闲时间
	int  nPercent=dwIdle*100/dwTotal;   // 计算百分比
	CString  strInfo;
	strInfo.Format("Idle: %1d ms,  Total: %1d ms,  %%: %d  ",dwIdle,dwTotal,nPercent);
	CMainFrame*  pFrame=(CMainFrame*) m_pMainWnd;  // 不同对象之间的交互
	CSpareTimeView*  pView=(CSpareTimeView*) pFrame->GetActiveView();
	pView->ShowIdleTime(strInfo);  // 显示运行时间、空闲时间和百分比
	return  TRUE;
//	return CWinApp::OnIdle(lCount);
}