cmediabookmarker.cpp

Windows Media Player CE SDK示范程序, EVC4下的程序。

// CMediaBookmarker.cpp : Implementation of the CMediaBookmarker class
//
// Copyright (c) Microsoft Corporation. All rights reserved.  THIS CODE IS MADE AVAILABLE AS 
// IS, WITHOUT WARRANTY OF ANY KIND. THE ENTIRE RISK OF THE USE OR THE RESULTS FROM THE USE 
// OF THIS CODE REMAINS WITH THE USER. USE AND REDISTRIBUTION OF THIS CODE, WITH OUR 
// WITHOUT MODICATION, IS HEREBY PERMITTED.
//

#include "stdafx.h"
#include "CMediaBookmarker.h"

#include <aygshell.h>

/////////////////////////////////////////////////////////////////////////////
// CMediaBookmarker

// Constructor:

CMediaBookmarker::CMediaBookmarker() :
m_szCurrentFile(NULL),
m_nFilterIndex(0),
m_cMarkCount(0),
m_dwAdviseCookie(0)
{
}

// Destructor:

CMediaBookmarker::~CMediaBookmarker()
{
	delete[] m_szCurrentFile;
	m_szCurrentFile = NULL;
	while (m_cMarkCount)
	{
		--m_cMarkCount;
		SysFreeString(m_bstrFileName[m_cMarkCount]);
		m_bstrFileName[m_cMarkCount] = NULL;
	}
}

// OnCreate: Set up the main window.

LRESULT CMediaBookmarker::OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
	AtlAxWinInit();

	CComPtr<IConnectionPointContainer> spConnectionContainer;
	HRESULT		hr = S_OK;
	TCHAR*		szPlayerGUID;						// The Windows Media Player Control GUID
	RECT		rcPlayer = { 0, 254, 240, 268 };	// The initial position of the Player window
	HINSTANCE	hInst = _Module.GetModuleInstance();

	// Create the host window for the Windows Media Player control.
	StringFromCLSID(__uuidof(WMP), &szPlayerGUID);
	m_wndView.Create(m_hWnd, rcPlayer, szPlayerGUID, WS_CHILD | WS_VISIBLE, NULL, IDC_PLAYER);
	CoTaskMemFree(szPlayerGUID);

	// Confirm that the host window was created.
	if (NULL == m_wndView.m_hWnd)
	{
		hr = E_FAIL;
	}

	// Retrieve a pointer to the Windows Media Player control interface.
	if (SUCCEEDED(hr))
	{
		hr = m_wndView.QueryControl(&m_spWMPPlayer);
	}

	// Start listening to events.

	if (SUCCEEDED(hr))
	{
		hr = m_spWMPPlayer->QueryInterface( IID_IConnectionPointContainer, (void**)&spConnectionContainer );
	}
	if (SUCCEEDED(hr))
	{
		hr = spConnectionContainer->FindConnectionPoint( __uuidof(_IWMPEvents), &m_spConnectionPoint );
	}
	if (SUCCEEDED(hr))
	{
		hr = m_spConnectionPoint->Advise( (IDispatch*)this, &m_dwAdviseCookie );
	}
	else
	{
		::PostQuitMessage(0);
		return 0;
	}

	// Hide the Windows Media Player control user interface.
	if (FAILED(m_spWMPPlayer->put_ShowControls(FALSE)))
	{
		return 0;
	}
	if (FAILED(m_spWMPPlayer->put_ShowPositionControls(FALSE)))
	{
		return 0;
	}
	if (FAILED(m_spWMPPlayer->put_ShowAudioControls(FALSE)))
	{
		return 0;
	}
	if (FAILED(m_spWMPPlayer->put_ShowTracker(FALSE)))
	{
		return 0;
	}

	// Create the custom user interface.
	CreateWindow(TEXT("BUTTON"), TEXT("Play"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		0, 0, 40, 20, m_hWnd, (HMENU)IDB_PLAY, hInst, NULL);
	CreateWindow(TEXT("BUTTON"), TEXT("Pause"),	WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		40, 0, 50, 20, m_hWnd, (HMENU)IDB_PAUSE, hInst, NULL);
	CreateWindow(TEXT("BUTTON"), TEXT("Stop"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		90, 0, 40, 20, m_hWnd, (HMENU)IDB_STOP, hInst, NULL);
	CreateWindow(TEXT("BUTTON"), TEXT("<<"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		130, 0, 55, 20, m_hWnd,	(HMENU)IDB_FASTREVERSE, hInst, NULL);
	CreateWindow(TEXT("BUTTON"), TEXT(">>"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		185, 0, 55, 20, m_hWnd,	(HMENU)IDB_FASTFORWARD, hInst, NULL);
	CreateWindow(TEXT("BUTTON"), TEXT("Mark"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		0, 20, 40, 20, m_hWnd, (HMENU)IDB_MARK, hInst, NULL);
	CreateWindow(TEXT("BUTTON"), TEXT("Clear Marks"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		40, 20, 90, 20, m_hWnd, (HMENU)IDB_CLEARMARKS, hInst, NULL);
	CreateWindow(TEXT("BUTTON"), TEXT("Play from Mark"), WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON, 
		130, 20, 110, 20, m_hWnd, (HMENU)IDB_PLAYMARK, hInst, NULL);
	CreateWindow(TEXT("LISTBOX"), TEXT("Bookmarks"),
		WS_CHILD | WS_VISIBLE | WS_BORDER | WS_VSCROLL | LBS_NOINTEGRALHEIGHT, 
		0, 40, 240, 214, m_hWnd, (HMENU)IDL_BOOKMARKS, hInst, NULL);

	// Create the menu bar.
	SHMENUBARINFO mbi;
	memset(&mbi, 0, sizeof(SHMENUBARINFO));
	mbi.cbSize		= sizeof(SHMENUBARINFO);
	mbi.hwndParent	= m_hWnd;
	mbi.nToolBarId	= IDM_MENU;
	mbi.hInstRes	= hInst;
	mbi.nBmpId		= 0;
	mbi.cBmpImages	= 0;
	SHCreateMenuBar(&mbi);

	return 0;
}

// OnDestroy: Clean up.

LRESULT CMediaBookmarker::OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
{
	// Stop listening to events.
	if (m_spConnectionPoint)
	{
		if (0 != m_dwAdviseCookie)
			m_spConnectionPoint->Unadvise(m_dwAdviseCookie);
		m_spConnectionPoint.Release();
	}

	//bHandled = FALSE;
	PostQuitMessage(0);
	return 0;
}

// OnOK: Makes the program inactive and hides the program window.

LRESULT CMediaBookmarker::OnOK(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)
{
	::SendMessage(m_hWnd, WM_ACTIVATE, MAKEWPARAM(WA_INACTIVE, 0), (LPARAM)m_hWnd);
	::SendMessage(m_hWnd, WM_CLOSE, 0, 0);
	return 0;
}

// OnFileOpen: Displays a dialog box that lets the user choose a file to play.

LRESULT CMediaBookmarker::OnFileOpen(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)
{
	OPENFILENAME ofn;		// Holds information used with the Open dialog box

	// Initialize the OPENFILENAME struct.
	memset(&ofn, 0, sizeof(ofn));
	ofn.lStructSize		= sizeof(ofn);
	ofn.hwndOwner		= m_hWnd;
	ofn.lpstrFilter		= TEXT("Audio Files\0*.MP3\0Video Files\0*.ASF\0All Files\0*.*\0\0");
	ofn.nFilterIndex	= m_nFilterIndex;
	ofn.lpstrFile		= new TCHAR[ _MAX_PATH ];
	ofn.lpstrFile[0]	= TEXT('\0');
	ofn.nMaxFile		= _MAX_PATH;

	// Confirm that the allocation of ofn.lpstrFile succeeded.
	if (NULL == ofn.lpstrFile)
	{
		return 0;
	}

	// Retrieve the file selection from the Open dialog box.
	if (TRUE == GetOpenFileName(&ofn))
	{
		// Store the filter index.
		m_nFilterIndex = ofn.nFilterIndex;

		// Play the file and store the file name without the path information.
		PlayMedia(ofn.lpstrFile, 0);
	}
	delete[] ofn.lpstrFile;
	ofn.lpstrFile = NULL;
	return 0;
}

// OnFileExit: Exits the program.

LRESULT CMediaBookmarker::OnFileExit(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)
{
	DestroyWindow();
	return 0;
}

// OnMark: Adds a bookmark to the bookmark list.

LRESULT CMediaBookmarker::OnMark(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)
{
	TCHAR *szBookmarkText;  // Temporary storage for formatted bookmark text

	// If there is room in the list, save the bookmark information,
	// update the list, and increment the bookmark count.
	if (m_cMarkCount < MAX_BOOKMARKS)
	{
		szBookmarkText = new TCHAR[MAX_MARKLENGTH];
		if (NULL != szBookmarkText && Bookmark(szBookmarkText))
		{
			if (LB_ERR < ::SendMessage(GetDlgItem(IDL_BOOKMARKS), LB_ADDSTRING, 0, (LPARAM)szBookmarkText))
			{
				::SendMessage(GetDlgItem(IDL_BOOKMARKS), LB_SETCURSEL, m_cMarkCount, 0);
				++m_cMarkCount;
			}
		}
		delete[] szBookmarkText;
		szBookmarkText = NULL;
	} 
	else 
	{
		MessageBox(TEXT("The bookmark list is full."), TEXT("Warning"), MB_OK);
	}
	return 0;
}

// OnClearMarks: Clears the bookmark list.

LRESULT CMediaBookmarker::OnClearMarks(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)
{
	if ( m_cMarkCount && 
		 IDOK == MessageBox(TEXT("Clear marks?"), TEXT("Confirm:"), MB_OKCANCEL) )
	{
		// Clear the bookmark list and free the memory held by the file name array.
		while (m_cMarkCount)
		{
			--m_cMarkCount;
			SysFreeString(m_bstrFileName[m_cMarkCount]);
			m_bstrFileName[m_cMarkCount] = NULL;
		}
		::SendMessage(GetDlgItem(IDL_BOOKMARKS), LB_RESETCONTENT, 0, 0) ;
	}
	return 0;
}

// OnPlayMark: Starts playback from a bookmarked position.

LRESULT CMediaBookmarker::OnPlayMark(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)
{
	LRESULT iMessageResult;	// The result of messages sent to the bookmark list control

	// Get the current selection from the bookmark list and play it.
	iMessageResult = ::SendMessage(GetDlgItem(IDL_BOOKMARKS), LB_GETCURSEL, 0, 0);
	if (LB_ERR < iMessageResult)
	{
		PlayMedia(m_bstrFileName[iMessageResult], m_dMarkPosition[iMessageResult]);