Browse, play, pause, close the four-button corresponding event response function is as follows:
Void CPlayWnddlg :: OnbnclicKedBrowsebutton ()
{
CfileDialog Dlgfile (True, Null, Null,
OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,
"Movie Files (* .avi; *. Mpg; *. Mpeg) | /
* .avi; *. mpg; *. MPEG | /
Audio Files (* .wav; * mp3; *. Mpa; *. Mpu; *. Au) | /
* .wav; *. mp3; *. mpa; *. mpu; *. au | /
MIDI
Files (* .mid; *. Midi; *. Rmi) | /
* .mid; *. midi; *. RMI | | ", this)
IF (DLGFILE.DOMODAL () == iDok)
{
M_StrMediafile = DLGFILE.GETPATHNAME ();
Getdlgitem (IDC_MEDIAFILE_EDIT) -> setWindowText; M_StrMediafile;
}
Else
Return;
CoCreateInstance (CLSID_FILTERGRAPH, NULL, CLSCTX_INPROC, IID_IGRAPHBUILDER, (Void **) & m_pgraph);
HRESULT HR = m_pgraph-> renderfile (CA2W (M_StrMediafile), NULL
IF (Failed (HR))
{
Char szmsg [200];
AMGETERRORTEXT (HR, SZMSG, SIZEOF (SZMSG));
AfxMessageBox (SZMSG);
}
// Specify a parent form
IvideoWindow * pvidwin = null;
m_pgraph-> queryinterface (IID_IVideoWindow, (void **) & pvidwin);
PVIDWIN-> PUT_OWNER (OAHWND) M_HWND);
PVIDWIN-> PUT_WINDOWSTYLE (WS_CHILD | WS_CLIPSIBLINGS | WS_CLIPCHILDREN);
CRECT RC;
Getdlgitem (IDC_VW_FRAME) -> getWindowRect (RC);
ScreenToClient (RC);
Pvidwin-> setwindowPosition (rc.left, rc.top, rc.width (), rc.Height ());
/ / Note The event of the Filter Graph Manager is issued in WM_GRAPHNOTIFY (user-defined messages).
m_pgraph-> queryinterface (IID_IMEDIAEVENTEX, (Void **) & m_pevent);
M_PEVENT-> SetNotifyWindow ((OAHWND) M_HWND, WM_GRAPHNOTIFY, 0);
// Set Seeking
m_pgraph-> queryinterface (iid_imediaseeking, (void **) & m_pmediaseeping);
}
Void CPlayWnddlg :: OnbnclicKedPlayButton ()
{
Play ();
}
Void CPlayWnddlg :: OnbnclickedPauseButton ()
{
M_PMediaControl-> pause ();
m_isplaming = true;
Getdlgitem (IDC_Play_Button) -> EnableWindow (TRUE);
Getdlgitem (IDC_PAUSE_BUTTON) -> EnableWindow (false);
void cpplaywnddlg :: OnbnclicKedCancel ()
{
// TODO: Add control notification processing code here
Cleanup ();
ONCANCEL ();
}
8. Add a to WM_GRAPHNOTIFY message, and its response function
Add a message ID to the PlayWnddlg:
#define WM_GraphNotify WM_USER 101
In PlayWnddlg.h, the code is as follows:
// Implement
protected:
Hicon M_Hicon;
// Generated message mapping function
Virtual Bool OnInitdialog ();
AFX_MSG Void OnSysCommand (Uint Nid, LParam Lparam);
AFX_MSG void onpaint ();
AFX_MSG HCURSOR ONQUERYDRAGICON ();
Declare_message_map ()
AFX_MSG HRESULT ONGRAPHNOTIFY (WPARAM WPARAM, LPARAM LPARAM);
Private:
IgraphBuilder * m_pgraph;
IMediaControl * m_pmediacontrol;
IMediaEventEx * m_pevent;
PlayWnddlg.cpp, as follows:
ON_BN_CLICKED (IDC_BROWSE_BUTTON, ONBNCLICKEDBROWSEBUTTON)
ON_BN_CLICKED (IDC_PLAY_BUTTON, ONBNCLICKEDPLAYBUTTON)
ON_BN_CLICKED (IDC_PAUSE_BUTTON, ONBNCLICKEDPAUSEBUTTON)
ON_BN_CLICKED (IDCANCANCEL, ONBNCLICKEDCANCEL)
ON_MESSAGE (WM_GRAPHNOTIFY, OONGRAPHNOTIFY)
END_MESSAGE_MAP ()
The implementation is as follows:
HRESULT CPLAYWNDDLG :: ONGRAPHNOTIFY (WPARAM WPARAM, LPARAM LPARAM)
{
Long Levcode, LPARAM1, LPARAM2;
HRESULT HR;
While (hr = m_pevent-> getEvent (& Levcode, & lParam1, & lparam2, 0), succeeded (hr))
{
HR = m_pevent-> FreeEventParams (Levcode, LPARAM1, LPARAM2);
IF ((EC_COMPLETE == Levcode) || (EC_USERABORT == Levcode))
{
"" End of the Media File !! ./ N ");
STOP ();
// cleanup ();
Break;
}
}
Return HR;
}
There is a need to request the source code with me.
