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/*
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* Copyright (c) 2006 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: Text label for Playback view
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*
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*/
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// INCLUDE FILES
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#include <AknsSkinInstance.h>
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#include <AknsDrawUtils.h>
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#include <AknsUtils.h>
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#include <AknMarqueeControl.h>
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#include <AknUtils.h>
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#include <AknLayoutFont.h>
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#include "mpxplaybackviewinfolabel.h"
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// CONSTANTS
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#ifdef _DEBUG
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_LIT( KPanicCat, "CMPXPlaybackViewInfoLabel" );
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#endif
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// MODULE DATA STRUCTURES
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enum TPanicCode
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{
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ENoPanic = 0,
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EAlreadyScrolling,
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ENoTextSet,
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EFontNotSet
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};
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// ======== MEMBER FUNCTIONS ========
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// ---------------------------------------------------------------------------
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// C++ default constructor can NOT contain any code, that
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// might leave.
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// ---------------------------------------------------------------------------
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//
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CMPXPlaybackViewInfoLabel::CMPXPlaybackViewInfoLabel()
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{
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// do nothing
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}
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// ---------------------------------------------------------------------------
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// Symbian 2nd phase constructor can leave.
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// ---------------------------------------------------------------------------
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//
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void CMPXPlaybackViewInfoLabel::ConstructL(TBool aEnableMarqueeSupport)
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{
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if ( aEnableMarqueeSupport )
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{
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iMarquee = CAknMarqueeControl::NewL();
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TCallBack callback( RedrawCallback, this );
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iMarquee->SetRedrawCallBack( callback );
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iMarquee->SetLoops( 1 );
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iMarquee->SetContainerWindowL( *this );
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}
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}
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// ---------------------------------------------------------------------------
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// Destructor
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// ---------------------------------------------------------------------------
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//
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CMPXPlaybackViewInfoLabel::~CMPXPlaybackViewInfoLabel()
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{
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delete iFullText;
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delete iMarquee;
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iBackground = NULL;
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}
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// ---------------------------------------------------------------------------
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// Set background bitmap
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// ---------------------------------------------------------------------------
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//
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void CMPXPlaybackViewInfoLabel::SetBackground(
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MAknsControlContext* aBackground )
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{
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iBackground = aBackground;
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}
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// ---------------------------------------------------------------------------
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// Redraw rectangle
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// ---------------------------------------------------------------------------
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//
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void CMPXPlaybackViewInfoLabel::RedrawRect( const TRect& aRect ) const
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{
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if ( aRect.Intersects( Rect() ) )
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{
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CWindowGc& gc = SystemGc();
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if ( iBackground )
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{
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MAknsSkinInstance* skin = AknsUtils::SkinInstance();
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AknsDrawUtils::Background( skin, iBackground, gc, Rect() );
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}
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CGraphicsContext::TTextAlign align=iAlignment.TextAlign();
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// Get baseline for current font
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TInt baselineOffset = 0;
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if ( iMarquee )
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{
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const CAknLayoutFont* layoutFont =
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CAknLayoutFont::AsCAknLayoutFontOrNull( Font() );
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if ( layoutFont )
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{
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baselineOffset= layoutFont->TextPaneTopToBaseline();
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}
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}
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gc.UseFont( Font() );
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gc.SetPenColor( iEikonEnv->ControlColor( EColorLabelText,*this ) );
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// Draw marquee, if supported and necessary
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if ( !iMarquee || !iMarquee->IsMarqueeOn() || iMarquee->DrawText(
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gc, // aGc
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Rect(), // aTextRect
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FullText(), // aText
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baselineOffset, // aBaselineOffset
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align, // aAlign
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*Font() ) ) // aFont
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{
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// Marquee is not enabled or all the loops have been executed
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// -> the text needs to be drawn here
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CEikLabel::Draw( aRect );
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}
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}
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}
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// ---------------------------------------------------------------------------
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// Start marquee scrolling if supported and needed.
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// ---------------------------------------------------------------------------
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//
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void CMPXPlaybackViewInfoLabel::StartMarquee()
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{
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if ( iMarquee )
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{
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TBool need = NeedToScroll();
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iMarquee->Stop();
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if ( need && !iMarquee->IsMarqueeOn() )
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{
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iMarquee->Reset();
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}
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iMarquee->EnableMarquee( need );
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if ( need )
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{
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iMarquee->Start();
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}
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}
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}
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// ---------------------------------------------------------------------------
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// Stop marquee scrolling.
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// ---------------------------------------------------------------------------
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//
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void CMPXPlaybackViewInfoLabel::StopMarquee()
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{
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if ( iMarquee )
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{
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iMarquee->EnableMarquee( EFalse );
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iMarquee->Stop();
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}
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}
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// ---------------------------------------------------------------------------
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// Get the full unclipped text for the label
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// ---------------------------------------------------------------------------
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//
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const TDesC& CMPXPlaybackViewInfoLabel::FullText() const
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{
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if ( iFullText )
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{
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return *iFullText;
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}
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else
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{
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return *Text();
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}
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}
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// ---------------------------------------------------------------------------
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// Set label text and clip if necessary.
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// ---------------------------------------------------------------------------
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//
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void CMPXPlaybackViewInfoLabel::SetLabelTextL( const TDesC& aText )
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{
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if ( iMarquee )
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{
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delete iFullText;
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iFullText = NULL;
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iFullText = aText.AllocL();
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}
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// magic: allocate 3 chars more (make sure "..." fits).
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HBufC* buf = HBufC::NewLC( aText.Length() + 3 );
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*buf = aText;
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TPtr ptr( buf->Des() );
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AknTextUtils::ClipToFit( ptr,
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*Font(),
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Rect().Width() );
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SetTextL( *buf );
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CleanupStack::PopAndDestroy( buf );
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}
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// ---------------------------------------------------------------------------
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// Check if scrolling is needed.
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// ---------------------------------------------------------------------------
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//
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TBool CMPXPlaybackViewInfoLabel::NeedToScroll() const
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{
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__ASSERT_DEBUG( iFont, User::Panic( KPanicCat, EFontNotSet ) );
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TBool need( EFalse );
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// We don't scroll text more than 250 chars in length.
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if ( iFullText )
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{
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if ( iFullText->Length() > 250 )
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{
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return need;
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}
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}
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if ( iFullText && iFont->TextWidthInPixels( *iFullText ) > Size().iWidth )
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{
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need = ETrue;
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}
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return need;
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}
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// ---------------------------------------------------------------------------
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// Redraw callback for marquee control
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// ---------------------------------------------------------------------------
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//
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TInt CMPXPlaybackViewInfoLabel::RedrawCallback( TAny* aPtr )
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{
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CMPXPlaybackViewInfoLabel* self =
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static_cast<CMPXPlaybackViewInfoLabel*>( aPtr );
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CWindowGc& gc = self->SystemGc();
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gc.Activate( *self->DrawableWindow() );
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self->Draw( self->Rect() );
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gc.Deactivate();
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return static_cast<TBool>( ETrue ); // True -> draw again
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}
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// ---------------------------------------------------------------------------
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// Draws the control.
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// ---------------------------------------------------------------------------
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//
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void CMPXPlaybackViewInfoLabel::Draw( const TRect& aRect ) const
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{
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RedrawRect( aRect );
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}
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// ---------------------------------------------------------------------------
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// Gets the number of controls contained in a compound control.
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// ---------------------------------------------------------------------------
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//
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TInt CMPXPlaybackViewInfoLabel::CountComponentControls() const
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{
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TInt childCount = 0;
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if ( iMarquee )
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{
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childCount++;
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}
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return childCount;
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}
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// ---------------------------------------------------------------------------
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// Gets an indexed component of a compound control.
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// ---------------------------------------------------------------------------
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//
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CCoeControl* CMPXPlaybackViewInfoLabel::ComponentControl(
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TInt aIndex ) const
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{
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ASSERT( aIndex == 0 ); // only 1 control
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return iMarquee;
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}
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// End of File
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