camerauis/activepalette/Src/ActivePalette2SemiTransparentFadingStyler.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 07 Jan 2010 16:18:56 +0200
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/*
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* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  
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*
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*/
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#include <gdi.h>
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#include <fbs.h>
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#include <activepalette2graphics.mbg>
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#include "ActivePalette2Logger.h"
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#include "ActivePalette2Cfg.h"
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#include "ActivePalette2Utils.h"
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#include "ActivePalette2SemiTransparentFadingStyler.h"
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static const TInt KAlphaMask = 0xFF;
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// -----------------------------------------------------------------------------
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// 2-phase constructor <<static>>
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// -----------------------------------------------------------------------------
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//
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CActivePalette2SemiTransparentFadingStyler* 
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CActivePalette2SemiTransparentFadingStyler::NewL()
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  {
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  CActivePalette2SemiTransparentFadingStyler* self = 
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      new (ELeave) CActivePalette2SemiTransparentFadingStyler();
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  CleanupStack::PushL(self);
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  self->ConstructL();
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  CleanupStack::Pop( self );
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  return self;
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  }
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// -----------------------------------------------------------------------------
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// Destructor <<virtual>>
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// -----------------------------------------------------------------------------
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//
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CActivePalette2SemiTransparentFadingStyler
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::~CActivePalette2SemiTransparentFadingStyler()
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  {
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  ReleaseTooltipBuf();
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  }
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// -----------------------------------------------------------------------------
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// BlitTooltip <<virtual>>
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// -----------------------------------------------------------------------------
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//
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void 
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CActivePalette2SemiTransparentFadingStyler
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::BlitTooltip( CBitmapContext* aGc, 
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               const TPoint&   aPos, 
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               TInt            aCurrentPhase, 
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               TInt            aTotalPhases )
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  {
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  TInt alpha_orig  = ( KAlphaMask * aCurrentPhase ) / aTotalPhases;
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  TInt alpha_value = alpha_orig & KAlphaMask; // Limit to 0..255
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  TRgb alpha       = TRgb::Gray256( alpha_value );
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  LOGTEXT1( _L("CActivePalette2SemiTransparentFadingStyler::BlitTooltip, alpha=%d"), alpha_value );
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  iTooltipAlphaContext->SetBrushColor( alpha );
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  iTooltipAlphaContext->SetBrushStyle( CGraphicsContext::ESolidBrush );
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  iTooltipAlphaContext->Clear();
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  iTooltipBlendedMaskContext->SetBrushColor( KRgbBlack );
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  iTooltipBlendedMaskContext->SetBrushStyle( CGraphicsContext::ESolidBrush );
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  iTooltipBlendedMaskContext->Clear();
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  iTooltipBlendedMaskContext->BitBltMasked( TPoint( 0,0 ), 
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                                            iTooltipAlphaBitmap, 
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                                            TooltipSize(),
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                                            iTooltipBufMaskBitmap, 
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                                            EFalse );
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  aGc->BitBltMasked( aPos, 
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                     iTooltipBufBitmap, 
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                     TooltipSize(),
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                     iTooltipBlendedMaskBitmap, 
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                     EFalse );
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  }
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// -----------------------------------------------------------------------------
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// TooltipNoseMaskId <<virtual>>
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// -----------------------------------------------------------------------------
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//
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TInt 
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CActivePalette2SemiTransparentFadingStyler::TooltipNoseMaskId()
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  {
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  return EMbmActivepalette2graphicsQgn_graf_cam4_tb_tooltip_end_mask;
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  }
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// -----------------------------------------------------------------------------
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// TooltipBodyMaskId <<virtual>>
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// -----------------------------------------------------------------------------
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//
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TInt 
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CActivePalette2SemiTransparentFadingStyler::TooltipBodyMaskId()
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  {
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  return EMbmActivepalette2graphicsQgn_graf_cam4_tb_tooltip_body_mask;
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  }
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// -----------------------------------------------------------------------------
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// AllocateTooltipBufL <<virtual>>
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// -----------------------------------------------------------------------------
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//
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void 
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CActivePalette2SemiTransparentFadingStyler::AllocateTooltipBufL()
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  {
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  ReleaseTooltipBuf();
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  ActivePalette2Utils::CreateDrawingObjectsL( TooltipSize(),
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                                              &iTooltipBufBitmap,
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                                              &iTooltipBufDevice,
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                                              &iTooltipBufContext );
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  ActivePalette2Utils::CreateDrawingObjectsL( EGray2,
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                                              TooltipSize(),
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                                              &iTooltipBufMaskBitmap,
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                                              &iTooltipBufMaskDevice,
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                                              &iTooltipBufMaskContext );
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  ActivePalette2Utils::CreateDrawingObjectsL( EGray256, 
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                                              TooltipSize(),
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                                              &iTooltipAlphaBitmap,
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                                              &iTooltipAlphaDevice,
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                                              &iTooltipAlphaContext );
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  ActivePalette2Utils::CreateDrawingObjectsL( EGray256, 
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                                              TooltipSize(),
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                                              &iTooltipBlendedMaskBitmap,
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                                              &iTooltipBlendedMaskDevice,
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                                              &iTooltipBlendedMaskContext );
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  }
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// -----------------------------------------------------------------------------
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// ReleaseTooltipBuf <<virtual>>
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// -----------------------------------------------------------------------------
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//
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void 
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CActivePalette2SemiTransparentFadingStyler::ReleaseTooltipBuf()
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  {
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  ActivePalette2Utils::DeleteDrawingObjects( &iTooltipBufBitmap,
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                                             &iTooltipBufDevice,
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                                             &iTooltipBufContext );
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  ActivePalette2Utils::DeleteDrawingObjects( &iTooltipBufMaskBitmap,
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                                             &iTooltipBufMaskDevice,
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                                             &iTooltipBufMaskContext );
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  ActivePalette2Utils::DeleteDrawingObjects( &iTooltipAlphaBitmap,
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                                             &iTooltipAlphaDevice,
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                                             &iTooltipAlphaContext );
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  ActivePalette2Utils::DeleteDrawingObjects( &iTooltipBlendedMaskBitmap,
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                                             &iTooltipBlendedMaskDevice,
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                                             &iTooltipBlendedMaskContext );
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  }
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