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MCI Midi class

, 14 Jul 2003
A tiny and very easy to use C++ class to play *.WAV, *.MID and *.RMI files
mididemo_appl.zip
Midi_Wav_Demo.exe
Marimba.mid
Birthday3.mid
Birthday1.mid
Birthday2.mid
Ring.wav
mididemo_src.zip
res
WINMM.LIB
MidiDemo.ico
MidiDemo.clw
MidiDemo.dsp
MidiDemo.dsw
// MidiDemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "MidiDemo.h"
#include "MidiDemoDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif




// ****************** MFC Stuff *************************



CMidiDemoDlg::CMidiDemoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CMidiDemoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CMidiDemoDlg)
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CMidiDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CMidiDemoDlg)
	DDX_Control(pDX, IDC_COMBO_PATH, mCtrl_ComboPath);
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CMidiDemoDlg, CDialog)
	//{{AFX_MSG_MAP(CMidiDemoDlg)
	ON_WM_PAINT()
	ON_WM_QUERYDRAGICON()
	ON_BN_CLICKED(IDC_BUTTON_PLAY, OnButtonPlay)
	ON_BN_CLICKED(IDC_BUTTON_STOP, OnButtonStop)
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


void CMidiDemoDlg::OnPaint() 
{
	if (IsIconic())
	{
		CPaintDC dc(this);

		SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);

		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;

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

HCURSOR CMidiDemoDlg::OnQueryDragIcon()
{
	return (HCURSOR) m_hIcon;
}


// ****************** Start of own code *************************


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

	SetIcon(m_hIcon, TRUE);
	SetIcon(m_hIcon, FALSE);

	CString s_CurDir;
	GetCurrentDirectory(MAX_PATH, s_CurDir.GetBuffer(MAX_PATH));
	s_CurDir.ReleaseBuffer();

	// The files have to be in the program directory !
	// Otherwise you have to specify the full path !
	mCtrl_ComboPath.InsertString(0, s_CurDir + "\\Marimba.mid");
	mCtrl_ComboPath.InsertString(1, s_CurDir + "\\Birthday1.mid");
	mCtrl_ComboPath.InsertString(2, s_CurDir + "\\Birthday2.mid");
	mCtrl_ComboPath.InsertString(3, s_CurDir + "\\Birthday3.mid");
	mCtrl_ComboPath.InsertString(4, s_CurDir + "\\Ring.wav");
	mCtrl_ComboPath.SetCurSel(0);

	return TRUE;
}


void CMidiDemoDlg::OnButtonPlay() 
{
	// get Path
	char s8_Buf[MAX_PATH];
	mCtrl_ComboPath.GetWindowText(s8_Buf, sizeof(s8_Buf));

	DWORD u32_Err;
	if (u32_Err=i_Sound.PlaySoundFile(s8_Buf))
	{
			 // errors defined in cSound.h
		     if (u32_Err == ERR_INVALID_FILETYPE)     strcpy(s8_Buf, "This filetype is not supported !");
		else if (u32_Err == ERR_PLAY_WAV)             strcpy(s8_Buf, "Windows could not play the Wav file !");
		else if (u32_Err == MCIERR_SEQ_NOMIDIPRESENT) strcpy(s8_Buf, "There is no Midi device installed or it is used by another application!");
		else
		{
			// translate errors from WinError.h
			if (!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, 0, u32_Err, 0, s8_Buf, sizeof(s8_Buf), 0))
			{
				// translate errors from MMsystem.h
				if (!mciGetErrorString(u32_Err, s8_Buf, sizeof(s8_Buf)))
				{
					sprintf(s8_Buf, "Error %d", u32_Err);
				}
			}
		}

		MessageBox(s8_Buf, "Error", MB_ICONSTOP);
	}
}


void CMidiDemoDlg::OnButtonStop()
{
	i_Sound.StopSoundFile();
}

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AXELMUELLER
Web Developer
Germany Germany
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