cdplayerdlg.cpp

Visual_C++.NET精彩案例237.rar

// CDPlayerDlg.cpp : 实现文件
//

#include "stdafx.h"
#include "CDPlayer.h"
#include "CDPlayerDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// 用于应用程序“关于”菜单项的 CAboutDlg 对话框

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

// 对话框数据
	enum { IDD = IDD_ABOUTBOX };

	protected:
	virtual void DoDataExchange(CDataExchange* pDX);    // DDX/DDV 支持

// 实现
protected:
	DECLARE_MESSAGE_MAP()
};

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

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

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
END_MESSAGE_MAP()


// CCDPlayerDlg 对话框



CCDPlayerDlg::CCDPlayerDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CCDPlayerDlg::IDD, pParent)
{
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
	
}

void CCDPlayerDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CCDPlayerDlg, CDialog)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	//}}AFX_MSG_MAP
	ON_BN_CLICKED(IDC_PLAY, OnBnClickedPlay)
	ON_BN_CLICKED(IDC_STOP, OnBnClickedStop)
	ON_BN_CLICKED(IDC_PAUSE, OnBnClickedPause)
	ON_BN_CLICKED(IDC_EJECT, OnBnClickedEject)
	ON_BN_CLICKED(IDC_SKIPBACK, OnBnClickedSkipback)
	ON_BN_CLICKED(IDC_SKIPFORWARD, OnBnClickedSkipforward)
	ON_BN_CLICKED(IDC_BACK, OnBnClickedBack)
	ON_BN_CLICKED(IDC_FORWARD, OnBnClickedForward)
	ON_WM_TIMER()
END_MESSAGE_MAP()


// CCDPlayerDlg 消息处理程序

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

	// 将\“关于...\”菜单项添加到系统菜单中。

	// IDM_ABOUTBOX 必须在系统命令范围内。
	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);
		}
	}

	// 设置此对话框的图标。当应用程序主窗口不是对话框时，框架将自动
	//  执行此操作
	SetIcon(m_hIcon, TRUE);			// 设置大图标
	SetIcon(m_hIcon, FALSE);		// 设置小图标

	// TODO：在此添加额外的初始化代码
	// Open the CD device.
	m_CDAudio.Open();
	SetTimer( 1, 1000, NULL );
	
	return TRUE;  // 除非设置了控件的焦点，否则返回 TRUE
}

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

// 如果向对话框添加最小化按钮，则需要下面的代码
//  来绘制该图标。对于使用文档/视图模型的 MFC 应用程序，
//  这将由框架自动完成。

void CCDPlayerDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this); // 用于绘制的设备上下文

		SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);

		// 使图标在工作矩形中居中
		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;

		// 绘制图标
		dc.DrawIcon(x, y, m_hIcon);
	}
	else
	{
		CDialog::OnPaint();
	}
}

//当用户拖动最小化窗口时系统调用此函数取得光标显示。
HCURSOR CCDPlayerDlg::OnQueryDragIcon()
{
	return static_cast<HCURSOR>(m_hIcon);
}

void CCDPlayerDlg::OnBnClickedPlay()
{
	// TODO: 在此添加控件通知处理程序代码
	//播放CD
	if( m_CDAudio.IsDriveReady() )
		m_CDAudio.Play();
}

void CCDPlayerDlg::OnBnClickedStop()
{
	// TODO: 在此添加控件通知处理程序代码
	//停止播放
	m_CDAudio.Stop();
}

void CCDPlayerDlg::OnBnClickedPause()
{
	// TODO: 在此添加控件通知处理程序代码
	//暂停播放
	m_CDAudio.Pause();
}

void CCDPlayerDlg::OnBnClickedEject()
{
	// TODO: 在此添加控件通知处理程序代码
	//关闭CD-ROM
	if( !m_CDAudio.IsDriveReady() )
		m_CDAudio.CloseDrive();
	else m_CDAudio.OpenDrive();

}

void CCDPlayerDlg::OnBnClickedSkipback()
{
	// TODO: 在此添加控件通知处理程序代码
	//计算上一首歌曲的位置
	int nTrack = m_CDAudio.GetCurrentTrack() - 1;
	if( nTrack < 1 )
		nTrack = m_CDAudio.GetTotalTracks();
	//播放上一首
	m_CDAudio.SeekTo( nTrack, 0, 0, 0 );
}

void CCDPlayerDlg::OnBnClickedSkipforward()
{
	// TODO: 在此添加控件通知处理程序代码
	//计算下一首歌曲的位置
	int nTrack = m_CDAudio.GetCurrentTrack() + 1;
	if( nTrack > m_CDAudio.GetTotalTracks() )
		nTrack = 1;
	//播放下一首	
	m_CDAudio.SeekTo( nTrack, 0, 0, 0 );

}

void CCDPlayerDlg::OnBnClickedBack()
{
	// TODO: 在此添加控件通知处理程序代码
	//获取当前的播放位置
	int nMinutes = m_CDAudio.GetMinutes();
	int nSeconds = m_CDAudio.GetSeconds();
	int nTrack = m_CDAudio.GetCurrentTrack();

	if( nMinutes == -1 )
		return;
	//后退5秒
	nSeconds -= 5;
	if( nSeconds < 0 )
	{
		nMinutes--;
		nSeconds += 60;
		if( nMinutes < 0 )
			nMinutes = 0;
	}

	//继续播放
	m_CDAudio.SeekTo( nTrack,nMinutes, nSeconds, 0 );
}

void CCDPlayerDlg::OnBnClickedForward()
{
	// TODO: 在此添加控件通知处理程序代码
	//获取当前的播放位置
	int nMinutes = m_CDAudio.GetMinutes();
	int nSeconds = m_CDAudio.GetSeconds();
	int nTrack = m_CDAudio.GetCurrentTrack();

	if( nMinutes == -1 )
		return;

	//快进5秒
	nSeconds += 5;
	if( nSeconds > 59 )
	{
		nMinutes++;
		nSeconds -= 60;
	}
	
	//获取当前歌曲的总时间
	int nTrackMinutes, nTrackSeconds;
	m_CDAudio.GetTrackLength( nTrack,&nTrackMinutes, &nTrackSeconds );

	if( nMinutes * 60 + nSeconds >nTrackMinutes * 60 + nTrackSeconds )
	{
		nMinutes = nTrackMinutes;
		nSeconds = nTrackSeconds;
	}

	//继续播放
	m_CDAudio.SeekTo( nTrack,nMinutes, nSeconds, 0 );
}

void CCDPlayerDlg::OnTimer(UINT nIDEvent)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	BOOL bDriveReady = TRUE;

	
	CString strStatus;
	CString Status;
	strStatus.Format( "已过去时间: %02d:%02d",m_CDAudio.GetMinutes(),m_CDAudio.GetSeconds() );
	Status.Format("正在播放第%d首",m_CDAudio.GetCurrentTrack());
	
	
	if( m_CDAudio.GetCurrentTrack() == -1 )
	{
		strStatus = "没有发现CD唱片";
		bDriveReady = FALSE;
		Status="";
		
	}
	//显示CD唱片信息
	SetDlgItemText( IDC_ELAPSE, strStatus );
	SetDlgItemText( IDC_TRACKINFO, Status );
	
	CString strLength;
	int nMinutes, nSeconds;
	
	//计算当前歌曲的总时间
	m_CDAudio.GetTrackLength(m_CDAudio.GetCurrentTrack(),&nMinutes, &nSeconds );
	strLength.Format( "当前歌曲总时间:  %02d:%02d",	nMinutes, nSeconds );

	SetDlgItemText( IDC_TOTAL, strLength);
	
	//更新按钮的状态
	CWnd *pWnd;
	pWnd = GetDlgItem( IDC_BACK );
	pWnd->EnableWindow( bDriveReady );
	pWnd = GetDlgItem( IDC_FORWARD );
	pWnd->EnableWindow( bDriveReady );
	pWnd = GetDlgItem( IDC_SKIPBACK );
	pWnd->EnableWindow( bDriveReady );
	pWnd = GetDlgItem( IDC_SKIPFORWARD );
	pWnd->EnableWindow( bDriveReady );
	BOOL bPaused;
	if( m_CDAudio.IsPlaying( &bPaused ) )
	{
		pWnd = GetDlgItem( IDC_PLAY );
		pWnd->EnableWindow( bPaused );
		pWnd = GetDlgItem( IDC_STOP );
		pWnd->EnableWindow( bDriveReady );
		pWnd = GetDlgItem( IDC_PAUSE );
		pWnd->EnableWindow( bDriveReady && !bPaused );
	}
	else
	{
		pWnd = GetDlgItem( IDC_PLAY );
		pWnd->EnableWindow( bDriveReady );
		pWnd = GetDlgItem( IDC_STOP );
		pWnd->EnableWindow( FALSE );
		pWnd = GetDlgItem( IDC_PAUSE );
		pWnd->EnableWindow( FALSE );
	}

	CDialog::OnTimer(nIDEvent);
}