examples/QtQuick/videoapp/videocontainer.cpp

00001 /****************************************************************************
00002 **
00003 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
00004 ** All rights reserved.
00005 ** Contact: Nokia Corporation
00006 **
00007 **
00008 ** $QT_BEGIN_LICENSE:BSD$
00009 ** You may use this file under the terms of the BSD license as follows:
00010 **
00011 ** "Redistribution and use in source and binary forms, with or without
00012 ** modification, are permitted provided that the following conditions are
00013 ** met:
00014 **   * Redistributions of source code must retain the above copyright
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00020 **   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
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00037 ** Description:  videocontainer.cpp, source file for video display container.
00038 ****************************************************************************/
00039 
00040 
00041 #include "videocontainer.h"
00042 
00046 CVideoContainer::CVideoContainer()
00047     {
00048     }
00049 
00050 
00055 CVideoContainer* CVideoContainer::NewL()
00056     {
00057     CVideoContainer* self = CVideoContainer::NewLC();
00058     return self;
00059     }
00060 
00061 CVideoContainer* CVideoContainer::NewLC()
00062     {
00063     CVideoContainer* self = new(ELeave) CVideoContainer();
00064     CleanupStack::PushL(self);
00065     self->ConstructL();
00066     CleanupStack::Pop();
00067     return self;
00068     }
00072 CVideoContainer::~CVideoContainer()
00073     {
00074     }
00075 
00076 
00080 void CVideoContainer::ConstructL()
00081     {
00082     // Creates a window for this application view
00083     CreateWindowL();
00084 
00085     // Sets the windows size
00086     TRect displayRect(TPoint(0,120),TSize(400,400));
00087     SetRect(displayRect);
00088     iVideoRect = displayRect;
00089 
00090     Window().SetRequiredDisplayMode(EColor16MA);
00091     TRgb backgroundColour = KRgbWhite;
00092     if( KErrNone == Window().SetTransparencyAlphaChannel() )
00093         {
00094         // we now have a semi-transparent window,
00095         // so we have to not clear the window region in an
00096         // opaque colour before drawing it each time;
00097         // 0 alpha is completely transparent,
00098         // 255 alpha is completely opaque
00099         backgroundColour.SetAlpha(0);
00100         }
00101     Window().SetBackgroundColor(backgroundColour);
00102     ActivateL();
00103     }
00104 
00108 void CVideoContainer::Draw(const TRect& /*aRect*/) const
00109     {
00110     // Get the standard graphics context
00111     CWindowGc& gc = SystemGc();
00112 
00113     // Gets the control's extent
00114     TRect drawRect( Rect() );
00115 
00116     // Clears the screen
00117     gc.Clear( drawRect );
00118 
00119     }
00120 
00126 void CVideoContainer::SizeChanged()
00127     {
00128     DrawNow();
00129     }
00130 
00131 
00132 // End of file

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