mciplayerdlg.cpp

vc程序设计技巧与实例中关于多媒体技术的vc++原代码

// MCIPlayerDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MCIPlayer.h"
#include "MCIPlayerDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CMCIPlayerDlg dialog

CMCIPlayerDlg::CMCIPlayerDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMCIPlayerDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMCIPlayerDlg)
		// 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 CMCIPlayerDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMCIPlayerDlg)
	DDX_Control(pDX, IDC_POSITION, m_SliderPosition);
	DDX_Control(pDX, IDC_RADIO_WAVE, m_radioWave);
	DDX_Control(pDX, IDC_RADIO_MIDI, m_radioMidi);
	DDX_Control(pDX, IDC_RADIO_CDAUDIO, m_radioCDAudio);
	DDX_Control(pDX, IDC_RADIO_AVI, m_radioAvi);
	DDX_Control(pDX, IDC_STOP, m_btStop);
	DDX_Control(pDX, IDC_PLAY, m_btPlay);
	DDX_Control(pDX, IDC_OPEN, m_btOpen);
	DDX_Control(pDX, IDC_EJECT, m_btEject);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMCIPlayerDlg, CDialog)
	//{{AFX_MSG_MAP(CMCIPlayerDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_OPEN, OnOpen)
	ON_BN_CLICKED(IDC_PLAY, OnPlay)
	ON_BN_CLICKED(IDC_STOP, OnStop)
	ON_BN_CLICKED(IDC_EJECT, OnEject)
	ON_BN_CLICKED(IDC_RADIO_WAVE, OnRadioWave)
	ON_BN_CLICKED(IDC_RADIO_MIDI, OnRadioMidi)
	ON_BN_CLICKED(IDC_RADIO_CDAUDIO, OnRadioCdaudio)
	ON_BN_CLICKED(IDC_RADIO_AVI, OnRadioAvi)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMCIPlayerDlg message handlers

BOOL CMCIPlayerDlg::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_SliderPosition.SetRange(0, 100);
	m_nMediumType = AfxGetApp()->GetProfileInt("Settings", "MediumType", 1);

	SetTimer(100, 10, NULL);

	switch (m_nMediumType)
	{
		case WAVE: m_radioWave.SetCheck(1); 
				   m_btOpen.EnableWindow(TRUE);
				   m_btEject.EnableWindow(FALSE);
				   break;
		case MIDI: m_radioMidi.SetCheck(1);
				   m_btOpen.EnableWindow(TRUE);
				   m_btEject.EnableWindow(FALSE);
				   break;
		case CDAUDIO: m_radioCDAudio.SetCheck(1);
				   OnRadioCdaudio();
				   m_btOpen.EnableWindow(FALSE);
				   m_btEject.EnableWindow(TRUE);
				   break;
		case AVI: m_radioAvi.SetCheck(1);
				   m_btOpen.EnableWindow(TRUE);
				   m_btEject.EnableWindow(FALSE);
				   break;
	}

	return TRUE;  // return TRUE  unless you set the focus to a control
}


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

void CMCIPlayerDlg::OnOpen() 
{
		CString strFilter;
	switch (m_nMediumType)
	{
		case WAVE: strFilter = "Wave Files (*.wav)|*.wav|All Files (*.*)|*.*||";
				   break;
		case MIDI: strFilter = "Midi Files (*.mid)|*.mid|All Files (*.*)|*.*||";
				   break;
		case AVI:  strFilter = "AVI Files (*.avi)|*.avi|All Files (*.*)|*.*||";
				   break;
	}
	CFileDialog FileDlg(TRUE, NULL, NULL, 
					   OFN_HIDEREADONLY|OFN_OVERWRITEPROMPT,
					   (LPCSTR)strFilter, this);
	if (FileDlg.DoModal() == IDOK)
	{
		CString strFileName = FileDlg.GetPathName();
		char szFileName[_MAX_PATH];
		GetShortPathName((LPCSTR)strFileName, szFileName, _MAX_PATH);
		char szExt[8];
		 _splitpath((const char *)szFileName, NULL, NULL, NULL, szExt);

		switch (m_nMediumType)
		{
			case WAVE: m_radioWave.SetCheck(0);
					   break;
			case MIDI: m_radioMidi.SetCheck(0);
					   break;
			case AVI:  m_radioAvi.SetCheck(0);
					   break;
		}

		// keep the open result
		MCIERROR mciError = 0;
		if (!stricmp(szExt, ".wav"))
		{
			m_radioWave.SetCheck(1);
			m_nMediumType = WAVE;
			mciError = Open(szFileName, "waveaudio", "", m_hWnd);
		}
		else if (!stricmp(szExt, ".mid"))
		{
			m_radioMidi.SetCheck(1);
			m_nMediumType = MIDI;
			mciError = Open(szFileName, "sequencer", "", m_hWnd);
		}
		else if (!stricmp(szExt, ".avi"))
		{
			m_radioAvi.SetCheck(1);
			m_nMediumType = AVI;
			mciError = Open(szFileName, "avivideo", "overlapped", m_hWnd);
		}

		// our default time format is ms
		if (mciError == 0)
		{
			SetTimeFormat("ms");
			m_SliderPosition.SetPos(0);
		}

		// if open failed, disable play button
		m_btPlay.EnableWindow(mciError ? FALSE:TRUE);

	}
}

void CMCIPlayerDlg::OnPlay() 
{
	Play();
	m_btPlay.EnableWindow(FALSE);
	m_btStop.EnableWindow(TRUE);	
}

void CMCIPlayerDlg::OnStop() 
{
	Stop();
	m_btPlay.EnableWindow(TRUE);
	m_btStop.EnableWindow(FALSE);
	
}

void CMCIPlayerDlg::OnEject() 
{
	Stop();
	m_bDoorOpen = !m_bDoorOpen;
	Eject(m_bDoorOpen);	
}

void CMCIPlayerDlg::OnRadioWave() 
{
	ClearOldMCI();
	m_nMediumType = WAVE;
	m_btOpen.EnableWindow(TRUE);
    m_btEject.EnableWindow(FALSE);	
}

void CMCIPlayerDlg::OnRadioMidi() 
{
	ClearOldMCI();
	m_nMediumType = MIDI;
	m_btOpen.EnableWindow(TRUE);
    m_btEject.EnableWindow(FALSE);	
}

void CMCIPlayerDlg::OnRadioCdaudio() 
{
	ClearOldMCI();
	m_nMediumType = CDAUDIO;
	m_btOpen.EnableWindow(FALSE);
    m_btEject.EnableWindow(TRUE);

	if (Open("", "CDAudio", "", m_hWnd) == 0)
	{
		SetTimeFormat("ms");
		m_SliderPosition.SetPos(0);
	}
	if (IsMediumPresent())
	{
		m_bDoorOpen = FALSE;
		m_btPlay.EnableWindow(TRUE);
		m_btStop.EnableWindow(FALSE);

		LONG lTrackNum = GetTrackNum();
		LONG lLength = GetLength();
		LONG lPos = 0;
		for (long l=1; l<=lTrackNum;++l)
		{
			lPos += GetTrackLength(l);
			m_SliderPosition.SetTic((int)(100*lPos/lLength));
		}

	}
	else
	{
		Eject(TRUE);
		m_bDoorOpen = TRUE;
		m_btPlay.EnableWindow(FALSE);
		m_btStop.EnableWindow(FALSE);
	}	
}

void CMCIPlayerDlg::OnRadioAvi() 
{
	ClearOldMCI();
	m_nMediumType = AVI;
	m_btOpen.EnableWindow(TRUE);
    m_btEject.EnableWindow(FALSE);	
}

void CMCIPlayerDlg::ClearOldMCI() 
{
	if (IsMediumOpen())
	{
		Stop();
		Close();
	}

	// not open yet...
	m_btPlay.EnableWindow(FALSE);
	m_btStop.EnableWindow(FALSE);
	m_SliderPosition.ClearTics(TRUE);
}

void CMCIPlayerDlg::OnTimer(UINT nIDEvent) 
{
	static bFailedCDA = FALSE;

	CString strMode = GetMode();

	if (strMode.CompareNoCase("not open"))
	{
		if (IsMediumPresent())
		{
			if (!strMode.CompareNoCase("stopped"))
			{
				if (bFailedCDA)
				{
					bFailedCDA = FALSE;
					OnRadioCdaudio();
				}
				else
				{
					m_btPlay.EnableWindow(TRUE);
					m_btStop.EnableWindow(FALSE);
				}
			}
			else if (!strMode.CompareNoCase("not ready"))
			{
				m_btPlay.EnableWindow(FALSE);
				m_btStop.EnableWindow(FALSE);

				if (CDAUDIO == m_nMediumType)
					bFailedCDA = TRUE;
			}
			
			// if medium open and present, set new position
			char szPos[256];
			m_SliderPosition.SetPos((int)(100*GetPosition(szPos)/GetLength()));
		}
		else
		{
			m_btPlay.EnableWindow(FALSE);
			m_btStop.EnableWindow(FALSE);

			if (CDAUDIO == m_nMediumType)
				bFailedCDA = TRUE;
		}
	}

	CDialog::OnTimer(nIDEvent);
}