--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/menufwui/mmwidgets/src/mmmarqueeadapter.cpp	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,395 @@
+/*
+* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  
+*
+*/
+
+
+#include <aknlayoutscalable_avkon.cdl.h>
+#include <AknUtils.h>
+#include <eikfrlb.h>
+#include <AknBidiTextUtils.h>
+#include <gdi.h>
+#include <AknLayoutFont.h>
+
+#include "mmlistbox.h"
+#include "mmmarqueeadapter.h"
+#include "mmwidgetsconstants.h"
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+CMmMarqueeAdapter::CMmMarqueeAdapter ()
+	{
+	// No implementation required
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+CMmMarqueeAdapter::~CMmMarqueeAdapter ()
+	{
+	iMarqueeElements.ResetAndDestroy();
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+CMmMarqueeAdapter* CMmMarqueeAdapter::NewLC ()
+	{
+	CMmMarqueeAdapter* self = new (ELeave)CMmMarqueeAdapter();
+	CleanupStack::PushL (self);
+	self->ConstructL ();
+	return self;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+CMmMarqueeAdapter* CMmMarqueeAdapter::NewL ()
+	{
+	CMmMarqueeAdapter* self = CMmMarqueeAdapter::NewLC ();
+	CleanupStack::Pop( self );
+	return self;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::ConstructL ()
+	{
+	iMarqueeEnabled = ETrue;
+	iCurrentMarqueeItemIndex = -1;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::AddMarqueeElementL(
+	    const TRect& aRect,
+	    const TDesC& aText,
+	    TAknLogicalFontId aFont,
+	    TRgb  aColor,
+		CGraphicsContext::TTextAlign aAlign,
+		TInt aIndex,
+		TInt aBaselineOffset,
+		TInt aCurrentlyDrawnItemIndex
+	    )
+	{
+	if( !iMarqueeEnabled )
+		{
+		return;
+		}
+	
+	if ( aCurrentlyDrawnItemIndex != iCurrentMarqueeItemIndex )
+		{
+		StopMarqueeDrawing();
+		iCurrentMarqueeItemIndex = aCurrentlyDrawnItemIndex;
+		}
+
+	CMmMarqueeElement* element = NULL;
+	TInt elementIndex(0);
+	for (TInt i = 0; i < iMarqueeElements.Count() ; i++)
+		{
+		if (iMarqueeElements[i]->iSubcellIndex == aIndex)
+			{
+			element = iMarqueeElements[i];
+			elementIndex = i;
+			break;
+			}
+		}
+
+	if ( element )
+		{
+		const TDesC& previousText = *(element->iText);
+		TBool textChanged = previousText.Compare( aText );
+	
+		if ( textChanged )
+			{
+			CAknMarqueeControl * control = element->iMarqueeControl;
+			control->Stop();
+			control->Reset();
+			iMarqueeElements.Remove(elementIndex );
+			delete element;
+			}
+		}
+	
+	if( SubcellMarqueeElementExists( aIndex ) )
+		{
+		return;
+		}
+		
+	CMmMarqueeElement* newElement = 
+		CMmMarqueeElement::NewL( aRect, aAlign, aText, aFont, aColor, aIndex, aBaselineOffset );
+	CleanupStack::PushL( newElement );
+	newElement->SetupMarqueeControlL( MmMarqueeConstants::KLoops,
+			MmMarqueeConstants::KScrollAmount, MmMarqueeConstants::KScrollDelay);
+    TCallBack callBack(CMmMarqueeAdapter::RedrawEvent, iListbox);
+    if ( newElement->iMarqueeControl ) 
+    	{
+        newElement->iMarqueeControl->SetRedrawCallBack(callBack);
+    	}
+    iMarqueeElements.AppendL( newElement );
+    CleanupStack::Pop( newElement );
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::StopMarqueeDrawing(TInt aIndex)
+	{
+    for (TInt elementIndex = iMarqueeElements.Count() - 1;
+            elementIndex >= 0; elementIndex--)
+        {
+        if ((aIndex < 0) ||
+                (iMarqueeElements[elementIndex]->iSubcellIndex == aIndex))
+            {
+            CMmMarqueeElement* element = iMarqueeElements[elementIndex];
+            CAknMarqueeControl * control = element->iMarqueeControl;
+            control->Stop();
+            control->Reset();
+            iMarqueeElements.Remove(elementIndex);
+            delete element;
+            if (iMarqueeElements.Count() == 0 || (aIndex >= 0))
+                {
+                iCurrentMarqueeItemIndex = -1;
+                break;
+                }
+            }
+        }
+    }
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::EnableMarquee( TBool aEnable )
+	{
+	iMarqueeEnabled = aEnable;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::DrawMarqueeL(CWindowGc & aGc )
+	{
+	if ( iCurrentMarqueeItemIndex != iListbox->View()->CurrentItemIndex() )
+		{
+		StopMarqueeDrawing();
+		return;
+		}
+	else if ( iMarqueeEnabled )
+		{
+		for (TInt i = 0; i < iMarqueeElements.Count() ; i++)
+			{
+			CMmMarqueeElement* element = iMarqueeElements[i];
+			CAknMarqueeControl* control = element->iMarqueeControl;
+			control->EnableMarquee( ETrue );
+			
+//			Setup graphical context ( font, colors ) for marquee
+			const CFont* font = AknLayoutUtils::FontFromId( element->iFont );
+            TInt baseLineOffset = CAknLayoutFont::AsCAknLayoutFontOrNull( font )->TextPaneTopToBaseline();
+            aGc.UseFont(font);
+            aGc.SetPenColor( element->iColor );
+            aGc.SetBrushStyle( CGraphicsContext::ENullBrush );
+            
+//			Let marquee know if it needs to do bidi conversion
+            control->UseLogicalToVisualConversion( ETrue );
+            
+            TRect subcellRectOnScreen = element->iElementRect;
+            TPoint currentItemPositionOnScreen 
+				= iListbox->View()->ItemPos( iListbox->View()->CurrentItemIndex() );
+            subcellRectOnScreen.Move( currentItemPositionOnScreen.iX , currentItemPositionOnScreen.iY );
+            if ( control->DrawText(aGc, subcellRectOnScreen, *(element->iText),
+            		baseLineOffset, element->iAlign, *font) )
+            	
+                {
+//              All the loops have been executed, the text needs to be truncated.
+                TBuf< MmMarqueeConstants::KClippingBufLength > clipbuf 
+					= (element->iText)->Left( MmMarqueeConstants::KTextTrimmingThreshold );
+//              Get the clipping buffer and draw it
+            	TInt maxClipWidth = element->iElementRect.Width();
+                AknBidiTextUtils::ConvertToVisualAndClipL( clipbuf, *font,
+                		element->iElementRect.Width(), maxClipWidth );
+                aGc.DrawText(clipbuf, subcellRectOnScreen, baseLineOffset , element->iAlign, 0);
+                }
+//          Clean the font cache in graphical context after marquee drawing
+            aGc.DiscardFont();
+			}
+		}
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+TInt CMmMarqueeAdapter::RedrawEvent(TAny* aControl )
+    {
+    if ( !((CCoeControl*)aControl)->IsVisible() )
+        {
+        return EFalse;
+        }
+    
+    CMmListBox* listBox = 
+            (CMmListBox*)aControl;
+    if (listBox->CurrentItemIndex() >= 0 
+    		&& listBox->CurrentItemIndex() <= listBox->View()->BottomItemIndex()
+    		&& listBox->CurrentItemIndex() >= listBox->View()->TopItemIndex()
+    		)
+        {
+        listBox->SetMarqueeDrawing( ETrue ); //redraw the item without using marquee in the last loop
+        listBox->View()->DrawItem( listBox->CurrentItemIndex() );
+        listBox->SetMarqueeDrawing(EFalse);
+        }
+    
+    return ETrue;
+    }
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::SetControl( CEikListBox * aControl )
+	{
+	iListbox = aControl;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+TBool CMmMarqueeAdapter::SubcellMarqueeElementExists( TInt aIndex )
+	{
+	TBool ret = EFalse;
+	for (TInt i = 0; i < iMarqueeElements.Count() ; i++)
+		{
+		if (iMarqueeElements[i]->iSubcellIndex == aIndex)
+			{
+			ret = ETrue;
+			}
+		}
+	return ret;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::RemoveSubcellMarqueeElement(TInt aSubcellIndex)
+	{
+	for (TInt i = 0; i < iMarqueeElements.Count() ; i++)
+		{
+		if (iMarqueeElements[i]->iSubcellIndex == aSubcellIndex)
+			{
+			iMarqueeElements.Remove(i);
+			break;
+			}
+		}
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+TBool CMmMarqueeAdapter::IsMarqueeEnabled() const
+    {
+    return iMarqueeEnabled;
+    }
+
+//class CMmMarqueeElement
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+CMmMarqueeAdapter::CMmMarqueeElement::CMmMarqueeElement (
+		TRect aElementRect,
+		CGraphicsContext::TTextAlign aAlign,
+		TAknLogicalFontId aFont,
+		TRgb aColor, TInt aIndex,
+		TInt aBaselineOffset ):iElementRect(aElementRect),
+		iAlign(aAlign),
+		iFont(aFont),iColor(aColor),
+		iSubcellIndex(aIndex),
+		iBaselineOffset(aBaselineOffset)
+	{
+
+	}
+
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+CMmMarqueeAdapter::CMmMarqueeElement::~CMmMarqueeElement ()
+	{
+	delete iMarqueeControl;
+	delete iText;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+CMmMarqueeAdapter::CMmMarqueeElement* CMmMarqueeAdapter::CMmMarqueeElement::NewL (
+		TRect aElementRect, CGraphicsContext::TTextAlign aAlign,
+		const TDesC& aText, TAknLogicalFontId aFont, TRgb aColor,TInt aIndex,
+		TInt aBaselineOffset )
+	{
+	CMmMarqueeAdapter::CMmMarqueeElement* self 
+		= new (ELeave)CMmMarqueeAdapter::CMmMarqueeElement( aElementRect, aAlign,
+				aFont, aColor, aIndex, aBaselineOffset );
+	CleanupStack::PushL( self ); 
+	self->ConstructL( aText );
+	CleanupStack::Pop( self );
+	return self;
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 		
+void CMmMarqueeAdapter::CMmMarqueeElement::ConstructL ( const TDesC& aText )
+	{
+	iText = aText.AllocL();
+	}
+
+// -----------------------------------------------------------------------------
+//
+// -----------------------------------------------------------------------------
+// 
+void CMmMarqueeAdapter::CMmMarqueeElement::SetupMarqueeControlL( 
+		TInt aLoops, 
+		TInt aScrollAmount, 
+		TInt aScrollDelay )
+	{
+	iMarqueeControl = CAknMarqueeControl::NewL( aLoops, aScrollAmount, aScrollDelay );
+	iMarqueeControl->SetLoops(aLoops);
+	iLoops = aLoops;
+	iScrollAmount = aScrollAmount;
+	iScrollDelay = aScrollDelay;
+	}
+// End of file
+
+		
+
+