void PaintWindow(HWND hWnd)
{
bool bNeedPaint = false;
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
if( g_mediaControl == NULL ) // we know that there is nothing loaded
{
bNeedPaint = true;
}
else
{
// If we have a movie loaded, we only need to repaint
// when the graph is stopped
OAFilterState state;
if( SUCCEEDED( g_mediaControl->GetState(0, & state ) ) )
{
bNeedPaint = ( state == State_Stopped );
}
}
if ( bNeedPaint )
{
RECT rc2;
GetClientRect(hWnd, &rc2);
FillRect(hdc, &rc2, (HBRUSH)(COLOR_WINDOW+1));
}
EndPaint( hWnd, &ps );
}
HRESULT
CloseGraph(HWND window)
{
if( g_mediaControl != NULL )
{
OAFilterState state;
do {
g_mediaControl->Stop();
g_mediaControl->GetState(0, & state );
} while( state != State_Stopped ) ;
}
g_allocator = NULL;
g_mediaControl = NULL;
g_filter = NULL;
g_graph = NULL;
::InvalidateRect( window, NULL, true );
return S_OK;
}