www.pudn.com > AVChat1.rar > CVideoWindow.cpp

// 
// CVideoWindow.cpp 
// 
 
/*-----------------------------------------------------*\ 
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 More information, please go to http://hqtech.nease.net. 
/*-----------------------------------------------------*/ 
 
#include "stdafx.h" 
#include "CVideoWindow.h" 
#include "CDXGraph.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
CVideoWindow::CVideoWindow() 
{ 
	mGraph = 0; 
} 
 
CVideoWindow::~CVideoWindow() 
{ 
	mGraph = 0; 
} 
 
void CVideoWindow::SetGraph(CDXGraph * inGraph) 
{ 
	if (mGraph != inGraph) 
	{ 
		if (mGraph) 
		{ 
			mGraph->SetDisplayWindow(0); 
			mGraph->SetNotifyWindow(0); 
		} 
		mGraph = inGraph; 
		if (mGraph) 
		{ 
			mGraph->SetDisplayWindow(m_hWnd); 
			mGraph->SetNotifyWindow(m_hWnd); 
		} 
	} 
} 
 
BEGIN_MESSAGE_MAP(CVideoWindow, CWnd) 
	//{{AFX_MSG_MAP(CVideoWindow) 
	ON_MESSAGE(WM_GRAPHNOTIFY, OnGraphNotify) 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
 
///////////////////////////////////////////////////////////////////////////// 
// CVideoWindow message handlers 
LRESULT CVideoWindow::OnGraphNotify(WPARAM inWParam, LPARAM inLParam) 
{ 
	if (mGraph) 
	{ 
		mGraph->HandleEvent(inWParam, inLParam); 
	} 
	return 0; 
} 
 
// Modify the video window style. Furthermore, remember to override 
// the Main dialog's WM_ERASEBKGND message procedure, as the following: 
/* 
BOOL CMainDlg::OnEraseBkgnd(CDC* pDC) // ON_WM_ERASEBKGND() 
{ 
	// Intercept background erasing for the movie window, since the 
    // video renderer will keep the screen painted.  Without this code, 
    // your video window might get painted over with gray (the default 
    // background brush) when it is obscured by another window and redrawn. 
    CRect rc; 
    // Get the bounding rectangle for the movie screen 
    mVideoWnd.GetWindowRect(&rc); 
    ScreenToClient(&rc); 
    // Exclude the clipping region occupied by our movie screen 
    pDC->ExcludeClipRect(&rc); 
 
	// Erase the remainder of the dialog as usual 
    return CDialog::OnEraseBkgnd(pDC); 
} 
*/ 
void CVideoWindow::PreSubclassWindow(void) 
{ 
	// Since we're embedding video in a child window of a dialog, 
    // we must set the WS_CLIPCHILDREN style to prevent the bounding 
    // rectangle from drawing over our video frames. 
	ModifyStyle(0, WS_CLIPCHILDREN); 
 
	CWnd::PreSubclassWindow(); 
}