cdplaydlg.cpp

这是书上的代码

// CDPlayDlg.cpp : implementation file
//

#include "stdafx.h"
#include "CDPlay.h"
#include "CDPlayDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CCDPlayDlg dialog

CCDPlayDlg::CCDPlayDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCDPlayDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CCDPlayDlg)
		// 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);
}

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

BEGIN_MESSAGE_MAP(CCDPlayDlg, CDialog)
	//{{AFX_MSG_MAP(CCDPlayDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUT_PLAY, OnButPlay)
	ON_WM_CLOSE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CCDPlayDlg message handlers

BOOL CCDPlayDlg::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 CCDPlayDlg::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 CCDPlayDlg::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 CCDPlayDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CCDPlayDlg::OnButPlay() 
{
	// TODO: Add your control notification handler code here
	//Track01.cda
	int PlayCurrentTrack=01;
	//先关闭所有打开设备
	mciSendCommand(MCI_ALL_DEVICE_ID,MCI_CLOSE,NULL,NULL);

	//设置打开设备的参数
	MCI_OPEN_PARMS OpenParms;
	//将要打开的设备的类型，要播放CD，设置为CD设备
	OpenParms.lpstrDeviceType=(LPSTR)MCI_DEVTYPE_CD_AUDIO;
	//将要播放的文件地址
	OpenParms.lpstrElementName="I:\\Track01.cda";
	//接受消息的窗口
	OpenParms.dwCallback=(DWORD)this;
	//打开设备，并返回设备号
	ULONG Error;

	if(Error=mciSendCommand(NULL,
		MCI_OPEN,MCI_OPEN_TYPE|MCI_OPEN_TYPE_ID|MCI_OPEN_ELEMENT,
		(DWORD)(LPVOID)&OpenParms))

		GetError(Error);
	else 
	{
		MessageBox("open device");//IfOpen=TRUE;
	}

	DeviceID=OpenParms.wDeviceID;
	
	//设置设备的时间格式为：轨道，分，秒，帧
	MCI_SET_PARMS SetParms;
	SetParms.dwTimeFormat=MCI_FORMAT_TMSF;
    mciSendCommand(DeviceID,MCI_SET,MCI_SET_TIME_FORMAT,
		        (DWORD)(LPVOID)&SetParms);

	//查寻歌曲时间
	MCI_STATUS_PARMS StatusParms;
	StatusParms.dwItem=MCI_STATUS_LENGTH;
	StatusParms.dwTrack=PlayCurrentTrack;
	if(Error=mciSendCommand(DeviceID,MCI_STATUS,MCI_STATUS_ITEM|MCI_TRACK,
		     (DWORD)(LPVOID)&StatusParms)) 
			 GetError(Error);

	//DWORD Start=StatusParms.dwReturn;

	int M,S,F;
	//歌曲时间长度中分钟数
	M=(int)MCI_MSF_MINUTE(StatusParms.dwReturn);
	//歌曲时间长度中秒钟数
	S=(int)MCI_MSF_SECOND(StatusParms.dwReturn);
//	F=(int)MCI_MSF_SECOND(StatusParms.dwReturn);

	//播放
	MCI_PLAY_PARMS PlayParms;
	//设置播放启始时间值(数据格式是TMSF)。
	PlayParms.dwFrom=MCI_MAKE_TMSF(PlayCurrentTrack,0,0,0);
	//设置播放终止时间值(数据格式是TMSF)。
	PlayParms.dwTo=MCI_MAKE_TMSF(PlayCurrentTrack,M,S,0);	
	//开始播放
	if(Error=mciSendCommand(DeviceID,MCI_PLAY,
		MCI_FROM|MCI_TO|MCI_NOTIFY,
		(DWORD)(LPVOID)&PlayParms))
	GetError(Error);
	
}


void CCDPlayDlg::GetError(ULONG Error)
{
char ErrorStr[80];
mciGetErrorString(Error,ErrorStr,80);
MessageBox(ErrorStr);
mciSendCommand(MCI_ALL_DEVICE_ID,MCI_STOP,NULL,NULL);
}

void CCDPlayDlg::OnClose() 
{
	// TODO: Add your message handler code here and/or call default
	mciSendCommand(MCI_ALL_DEVICE_ID,MCI_STOP,NULL,NULL);
	CDialog::OnClose();
}