controlsounddlg.cpp

来自「《Visual C++视频技术方案宝典》配套光盘」· C++ 代码 · 共 256 行

// ControlSoundDlg.cpp : implementation file
//

#include "stdafx.h"
#include "ControlSound.h"
#include "ControlSoundDlg.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()

/////////////////////////////////////////////////////////////////////////////
// CControlSoundDlg dialog

CControlSoundDlg::CControlSoundDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CControlSoundDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CControlSoundDlg)
		// 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 CControlSoundDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CControlSoundDlg)
	DDX_Control(pDX, IDC_CONTROL, m_control);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CControlSoundDlg, CDialog)
	//{{AFX_MSG_MAP(CControlSoundDlg)
	ON_WM_SYSCOMMAND()
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_MESSAGE(MM_MIXM_CONTROL_CHANGE,OnMixerCtrlChange)
	ON_WM_HSCROLL()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CControlSoundDlg message handlers

BOOL CControlSoundDlg::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
	
	MIXERLINE mxl;
	MIXERCONTROL mxc;
	MIXERLINECONTROLS mxlc;

	mixerOpen(&m_hMixer,0,(DWORD)this->GetSafeHwnd(),
			NULL,MIXER_OBJECTF_MIXER | CALLBACK_WINDOW);
	mixerGetDevCaps((UINT)m_hMixer, &m_mxcaps, sizeof(MIXERCAPS));
	mxl.cbStruct = sizeof(MIXERLINE);
	mxl.dwComponentType =MIXERLINE_COMPONENTTYPE_DST_SPEAKERS;

	mixerGetLineInfo((HMIXEROBJ)m_hMixer,&mxl,
			MIXER_OBJECTF_HMIXER|MIXER_GETLINEINFOF_COMPONENTTYPE);
	
	mxlc.cbStruct=sizeof(MIXERLINECONTROLS);
	mxlc.dwLineID=mxl.dwLineID;
	mxlc.dwControlType=MIXERCONTROL_CONTROLTYPE_VOLUME;
	mxlc.cControls=1;//一般为1
	mxlc.cbmxctrl=sizeof(MIXERCONTROL);
	mxlc.pamxctrl=&mxc;
	mixerGetLineControls((HMIXEROBJ)m_hMixer,&mxlc,
			MIXER_OBJECTF_HMIXER|MIXER_GETLINECONTROLSF_ONEBYTYPE);

	m_controlid=mxc.dwControlID;

	m_control.SetRange(mxc.Bounds.lMinimum,mxc.Bounds.lMaximum);
	MIXERCONTROLDETAILS_SIGNED mxcdVolume;
	MIXERCONTROLDETAILS mxcd;
	mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
	mxcd.dwControlID = mxc.dwControlID;
	mxcd.cChannels = 1;
	mxcd.cMultipleItems = 0;
	mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_SIGNED);
	mxcd.paDetails = &mxcdVolume;

	mixerGetControlDetails((HMIXEROBJ)m_hMixer,&mxcd,
			MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE);
	m_control.SetPos(mxcdVolume.lValue);
	return TRUE;
}

void CControlSoundDlg::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 CControlSoundDlg::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 CControlSoundDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}
LONG CControlSoundDlg::OnMixerCtrlChange(UINT wParam, LONG lParam)
{
	if ((HMIXER)wParam == m_hMixer && (DWORD)lParam ==m_controlid)
	{
	MIXERCONTROLDETAILS_UNSIGNED mxcdVolume;
	MIXERCONTROLDETAILS mxcd;
	mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
	mxcd.dwControlID = m_controlid;
	mxcd.cChannels = 1;
	mxcd.cMultipleItems = 0;
	mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
	mxcd.paDetails = &mxcdVolume;

	mixerGetControlDetails((HMIXEROBJ)m_hMixer,&mxcd,
			MIXER_OBJECTF_HMIXER|MIXER_GETCONTROLDETAILSF_VALUE);
		
	m_control.SetPos(mxcdVolume.dwValue);
	}
	return 0L;
}

BOOL CControlSoundDlg::DestroyWindow() 
{
	if(m_hMixer!=NULL)
	{
		mixerClose(m_hMixer);
		m_hMixer=NULL;
	}
	return CDialog::DestroyWindow();
}

void CControlSoundDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar) 
{
	DWORD val;
	val=((CSliderCtrl*)pScrollBar)->GetPos();
	MIXERCONTROLDETAILS_UNSIGNED mxcdVolume = {val};
	MIXERCONTROLDETAILS mxcd;
	mxcd.cbStruct = sizeof(MIXERCONTROLDETAILS);
	mxcd.dwControlID = m_controlid;
	mxcd.cChannels = 1;
	mxcd.cMultipleItems = 0;
	mxcd.cbDetails = sizeof(MIXERCONTROLDETAILS_UNSIGNED);
	mxcd.paDetails = &mxcdVolume;
 
	mixerSetControlDetails((HMIXEROBJ)m_hMixer,&mxcd,
		MIXER_OBJECTF_HMIXER|MIXER_SETCONTROLDETAILSF_VALUE);
	CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}