mcidlg.cpp

一个用MFC编写的音乐播放程序

// MCIDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MCI.h"
#include "MCIDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMCIDlg dialog

CMCIDlg::CMCIDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMCIDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMCIDlg)
		// 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 CMCIDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMCIDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMCIDlg, CDialog)
	//{{AFX_MSG_MAP(CMCIDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_OPEN_BUTTON, OnOpenButton)
	ON_BN_CLICKED(IDC_PLAY_BUTTON, OnPlayButton)
	ON_BN_CLICKED(IDC_EXIT_BUTTON, OnExitButton)
	ON_BN_CLICKED(IDC_PAUSE_BUTTON, OnPauseButton)
	//}}AFX_MSG_MAP
	ON_MESSAGE(MM_MCINOTIFY,MciNotify)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMCIDlg message handlers
LRESULT CMCIDlg::MciNotify(WPARAM wParam,LPARAM lParam)
{
	if (wParam==MCI_NOTIFY_SUCCESSFUL)
	{
		return 0;
	}
    return -1;
}
BOOL CMCIDlg::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
	m_MCIDeviceId=0;        //初始化设备ID
	ispause=0;              //处于播放状态
	//sndPlaySound("systemstart",SND_ASYNC);
	return TRUE;  // return TRUE  unless you set the focus to a control
}

void CMCIDlg::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 CMCIDlg::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 CMCIDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}

void CMCIDlg::OnOpenButton() 
{
	// TODO: Add your control notification handler code here
	CString filename;      //文件名
	CString fileext;       //文件后缀名
	MCI_OPEN_PARMS mci_open_parms;  //打开参数结构体
    static char filter[]="波形(*.wav)|*.wav|MIDI序列(*.mid)|*.mid|\0";//选择打开文件的范围

	CFileDialog dlg(TRUE,NULL,NULL,OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,filter,NULL);
	dlg.DoModal();          //查询文件
	filename=dlg.GetFileName();
	fileext=dlg.GetFileExt();

	if (!strcmp(fileext,"wav"))
        mci_open_parms.lpstrDeviceType="waveaudio";
	else if(!strcmp(fileext,"mid"))
		mci_open_parms.lpstrDeviceType="sequencer";
	mci_open_parms.lpstrElementName=filename;
	dwError=mciSendCommand(0,MCI_OPEN,MCI_OPEN_TYPE|MCI_OPEN_ELEMENT,(DWORD)(LPVOID)&mci_open_parms);
    if (dwError)
	{
      mciGetErrorString(dwError,errorbuf,MAXERRORLENGTH);
	  MessageBox(errorbuf,"MCI出错",MB_ICONQUESTION);
	}   
	m_MCIDeviceId=mci_open_parms.wDeviceID;



}

void CMCIDlg::OnPlayButton() 
{
	// TODO: Add your control notification handler code here
	MCI_PLAY_PARMS mciplayparms;  //播放参数结构体
    mciplayparms.dwCallback=(long)GetSafeHwnd();
	mciplayparms.dwFrom=0;
	dwError=mciSendCommand(m_MCIDeviceId,MCI_PLAY,MCI_FROM|MCI_NOTIFY,(DWORD)(LPVOID)&mciplayparms);
    if (dwError)
	{
      mciGetErrorString(dwError,errorbuf,MAXERRORLENGTH);
	  MessageBox(errorbuf,"MCI出错",MB_ICONQUESTION);
	}

}

void CMCIDlg::OnExitButton() 
{
	// TODO: Add your control notification handler code here
	CDialog::OnOK();
}

void CMCIDlg::OnPauseButton() 
{
	// TODO: Add your control notification handler code here
	if (!ispause)
	  dwError=mciSendCommand(m_MCIDeviceId,MCI_PAUSE,0,NULL);
	else
	  dwError=mciSendCommand(m_MCIDeviceId,MCI_RESUME,0,NULL);//只对WAV文件起作用
    ispause=!ispause;
    if (dwError)
	{
      mciGetErrorString(dwError,errorbuf,MAXERRORLENGTH);
	  MessageBox(errorbuf,"MCI出错",MB_ICONWARNING);
	}   
}