书籍源码

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Visual C++

DSDemoDlg.cpp：源码内容
							// DSDemoDlg.cpp : implementation file
//
#include "stdafx.h"
#include "DSDemo.h"
#include "DSDemoDlg.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()
/////////////////////////////////////////////////////////////////////////////
// CDSDemoDlg dialog
CDSDemoDlg::CDSDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CDSDemoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDSDemoDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CDSDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDSDemoDlg)
	DDX_Control(pDX, ID_EFFECTVOLUME, m_SliderEffectVolume);
	DDX_Control(pDX, ID_BKVOLUME, m_SliderBKVolume);
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CDSDemoDlg, CDialog)
	//{{AFX_MSG_MAP(CDSDemoDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_NOTIFY(NM_RELEASEDCAPTURE, ID_BKVOLUME, OnReleasedcaptureBkvolume)
	ON_NOTIFY(NM_RELEASEDCAPTURE, ID_EFFECTVOLUME, OnReleasedcaptureEffectvolume)
	ON_BN_CLICKED(IDC_EFFECT, OnEffect)
	ON_BN_CLICKED(IDC_PLAYBKMUSIC, OnPlaybkmusic)
	ON_WM_CLOSE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CDSDemoDlg message handlers
BOOL CDSDemoDlg::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
	//设置音量范围
	m_SliderBKVolume.SetRange(0,100);
	m_SliderEffectVolume.SetRange(0,100);
	//初始时的音量均设成最大值
	m_SliderBKVolume.SetPos(100);
	m_SliderEffectVolume.SetPos(100);
	//选中播放背景音乐复选框
	((CButton*)GetDlgItem(IDC_PLAYBKMUSIC))->SetCheck(1);  
	//初始化DirectSound对象
	if(!InitializeDirectSound(*AfxGetMainWnd()))
	{
		AfxMessageBox("初始化DirectSound失败!",MB_OK);
		CDialog::OnOK();
		return TRUE  ;
	}
	//创建声音缓冲区
	m_lpBkGrdDSBuffer=new CDSBuffer("bk.wav",TRUE,m_lpDS);
    m_lpYinXiaoDSBuffer=new CDSBuffer("effect.wav",FALSE,m_lpDS);
	//播放背景音乐
	m_lpBkGrdDSBuffer->PlaySound();
	return TRUE;  // return TRUE  unless you set the focus to a control
}
void CDSDemoDlg::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 CDSDemoDlg::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 CDSDemoDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
BOOL CDSDemoDlg::InitializeDirectSound(HWND hWnd)
{
	// 创建背景音乐和音效DirectSound对象
	if (DS_OK != DirectSoundCreate(NULL, &m_lpDS, NULL))
	{
		::MessageBox(NULL,"创建DirectSound对象失败n找不到可利用的声音设备",NULL,MB_OK);
		return FALSE;
	}
	// 设置协作级别
	if (DS_OK != m_lpDS->SetCooperativeLevel(hWnd, DSSCL_NORMAL))
	{
		::MessageBox(NULL,"设置协作级别失败",NULL,MB_OK);
		return FALSE;
	}
	return TRUE;
}
void CDSDemoDlg::ClearDSBuffer()
{
    m_lpBkGrdDSBuffer->StopSound();
	m_lpYinXiaoDSBuffer->StopSound();
	if (m_lpBkGrdDSBuffer)
		delete m_lpBkGrdDSBuffer;
	if (m_lpYinXiaoDSBuffer)
		delete m_lpYinXiaoDSBuffer;
}
void CDSDemoDlg::OnReleasedcaptureBkvolume(NMHDR* pNMHDR, LRESULT* pResult) 
{
	int nPos = m_SliderBKVolume.GetPos();
	m_lpBkGrdDSBuffer->SetVolume(nPos);
	
	*pResult = 0;
}
void CDSDemoDlg::OnReleasedcaptureEffectvolume(NMHDR* pNMHDR, LRESULT* pResult) 
{
	int nPos = m_SliderEffectVolume.GetPos();
	m_lpYinXiaoDSBuffer->SetVolume(nPos);
	*pResult = 0;
}
void CDSDemoDlg::OnEffect() 
{
	m_lpYinXiaoDSBuffer->PlaySound();
	
}
void CDSDemoDlg::OnPlaybkmusic() 
{
	CButton* pButton = (CButton*)GetDlgItem(IDC_PLAYBKMUSIC);
	BOOL bFlag = (pButton->GetCheck() == 1);
	if (bFlag)	m_lpBkGrdDSBuffer->PlaySound();
	else m_lpBkGrdDSBuffer->StopSound();
}
void CDSDemoDlg::OnClose() 
{
	// 删除声音缓冲区对象
	ClearDSBuffer();
	CDialog::OnClose();
}

						