mp3playerdlg.cpp

EVC环境下用SDK开发WINCE的应用程序

// CMP3PlayerDlg.cpp: implementation of the CMP3PlayerDlg class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "MP3PlayerDlg.h"
#include "commctrl.h"
#include "UICommon.h"

BEGIN_MESSAGE_MAP(CMP3PlayerDlg, CMediaPlayer)
	ON_BN_CLICKED(IDC_PREVIOUS,OnPrevious)
	ON_BN_CLICKED(IDC_NEXT,OnNext)
END_MESSAGE_MAP()


//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CMP3PlayerDlg::CMP3PlayerDlg(CNWnd* pParent, UINT uID)
	:CMediaPlayer(pParent, uID)
{

}

CMP3PlayerDlg::~CMP3PlayerDlg()
{

}


BOOL CMP3PlayerDlg::OnInitDialog()
{
	CMediaPlayer::OnInitDialog();

	// subclassing dialog item
	m_lbFileList.SubclassDlgItem(IDC_FILE_LIST, this);
	m_lbFileList.SetWindowPos(NULL, 1,1,
		SCREEN_WIDTH-2, SCREEN_HEIGHT - MP_BAR_HEIGHT-14, 0);

	// searching files and add to list box.
	FILE_NAME *pFileName = GetFileList(NGetCurrentDir(),//(_T("D:\\Documents and Settings\\morson\\"),
		_T("*.mp3 | *.wma | *.ram | *.rm "));
	if(pFileName)
	{
		TCHAR szFileFullName[MAX_PATH +1];
		for(int i=0; i<GetCount(); i++)
		{
			_tcscpy(szFileFullName, pFileName[i].FilePath);
			_tcscat(szFileFullName, pFileName[i].FileName);
			m_lbFileList.AddItem(szFileFullName, LISTBOX_ITEM_NOT_PLAYING);
		}

		// select the first one in listbox in default and play it.
		m_lbFileList.SetCurSel(0);
		PlayItem(0);
	}

	ReleaseFileList();

	return TRUE;
}


BOOL CMP3PlayerDlg::OnEraseBkgnd(HDC hdc)
{
	RECT rc;
	SetRect(&rc, 0, 0, SCREEN_WIDTH, SCREEN_HEIGHT);
	FillSolidRect(hdc, &rc, MP_BAR_COLOR);
	
	return TRUE;
}

void CMP3PlayerDlg::OnIdle()
{
	// do't call base class OnIdle(), it does something special for it.
	CNDialog::OnIdle();
}

LRESULT CMP3PlayerDlg::WndProc(HWND hWnd,
		UINT uMsg, WPARAM wParam, LPARAM lParam)
{

	// handle List box's notify message.
	if( uMsg == WM_COMMAND && LOWORD(wParam)== IDC_FILE_LIST)
	{	
		// double click one item.
		if( HIWORD(wParam) == LBN_DBLCLK )
		{
			// play the selected item.
			PlayItem( m_lbFileList.GetCurSel() );
		}
	}

	// handle dshow's notification message.
	if( uMsg == WM_MULTIMEDIA_NOTIFY )
	{
		ASSERT( m_pMultimedia != NULL);
		int eventCode;
		m_pMultimedia->HandleEvent((WPARAM)&eventCode, 0);
		if(eventCode == EC_COMPLETE)	// play next one.
		{
			int nItem = GetPlayingItem();
			// if it's not the last one, then play the next item.
			if( nItem < m_lbFileList.GetCount() - 1 )
			{
				PlayItem(nItem+1);
			}
		}		
	}

	return CMediaPlayer::WndProc(hWnd, uMsg, wParam, lParam);
}

// playback the item in the list box indexed by nIndex.
void CMP3PlayerDlg::PlayItem(int nIndex)
{
	for (int i=0; i<m_lbFileList.GetCount(); i++)
	{
		if(i == nIndex)
			m_lbFileList.SetItemData(i, LISTBOX_ITEM_IS_PLAYING);
		else
			m_lbFileList.SetItemData(i, LISTBOX_ITEM_NOT_PLAYING);
	}
	m_lbFileList.InvalidateRect(NULL);

	// Get the file name and play it.
	TCHAR	szFileFullName[MAX_PATH+1];
	m_lbFileList.GetItemText(nIndex, szFileFullName, MAX_PATH);
	m_strFileName = szFileFullName;
	CreateMultimedia();
}

// if found, return the index of the item.
// in not found, return -1.
int CMP3PlayerDlg::GetPlayingItem()
{
	BOOL bFound = FALSE;
	for (int i=0; i<m_lbFileList.GetCount(); i++)
	{
		if(m_lbFileList.GetItemData(i) == LISTBOX_ITEM_IS_PLAYING)
		{
			bFound = TRUE;
			break;
		}
	}

	if( bFound )
		return i;
	else
		return -1;

}


void CMP3PlayerDlg::OnPrevious()
{

}

// forward
void CMP3PlayerDlg::OnNext()
{

}