mulwidgets/alfscrollbarwidget/src/alfscrollbarcontrol.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 11 May 2010 16:42:11 +0300
branchRCL_3
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Revision: 201017 Kit: 201019
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/*
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* Copyright (c) 2007, 2008 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:  Control Implementation with utilities for scrollbar widget.
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*
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*/
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// Toolkit includes
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#include <alf/alfenv.h>
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#include <alf/alfroster.h>
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#include <alf/alfdisplay.h>
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// Widget model includes
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#include <alf/alfwidgetevents.h>
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#include <alf/alfcontrolgroup.h>
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// Widget includes
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#include <alf/ialfscrollbardefaultbaseelement.h>
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#include "ialfscrollbarbaseelementinternal.h"
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// Internal includes
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#include "alfscrollbarcontrol.h"
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#include "alfscrollbarwidget.h"
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// namespaces
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using namespace osncore;
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using namespace alfscrollbarwidget;
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namespace Alf
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    {
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// ---------------------------------------------------------------------------
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//  Constructor.
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// ---------------------------------------------------------------------------
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//
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AlfScrollBarControl::AlfScrollBarControl(CAlfEnv& aEnv) : 
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    CAlfWidgetControl(aEnv)
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    {
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    mLayoutHeight = -1; //this means that the first draw is yet to happen.
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    mLayoutWidth = -1;  //this means that the first draw is yet to happen.
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    disableState(IAlfWidgetControl::Focusable);
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    mTactilefdbInstance = NULL;
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    mDragTactileFeedbackStarted = false;
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    mEnableTactile = false; // Next statement will make it true
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    EnableTactileFeedback(true);
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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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AlfScrollBarControl::~AlfScrollBarControl()
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    {
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    }
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// ---------------------------------------------------------------------------
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// 
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// enableTactileFeedback
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// ---------------------------------------------------------------------------
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//
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void AlfScrollBarControl::EnableTactileFeedback(bool aEnabled)
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    {
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        if (!mTactilefdbInstance)
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            {
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             mEnableTactile = aEnabled;
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             mTactilefdbInstance = MTouchFeedback::Instance();
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            }
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    }
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//-----------------------------------------------------------------------------
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//
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//  TouchTactileEffectOnTouch
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//-----------------------------------------------------------------------------
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void AlfScrollBarControl::TactileEffectOnTouchandHold()
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    {
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    if (mTactilefdbInstance)
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        {
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         mTactilefdbInstance->InstantFeedback(ETouchFeedbackSlider);
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        }
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    }
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//-------------------------------------------------------------------------------
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//
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//
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//--------------------------------------------------------------------------------     
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void AlfScrollBarControl::TactileEffectOnDrag(TAlfEvent& aEvent)
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{            
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 if (mTactilefdbInstance)
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  {
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    CCoeControl* ccoecntrl = static_cast<CCoeControl*>(Display()->ObjectProvider());
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    TInt intensity = 50;
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    TTimeIntervalMicroSeconds32 timespan = 400000;
0
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    mTactilefdbInstance->StartFeedback(ccoecntrl,ETouchContinuousSlider,&aEvent.PointerEvent(),intensity,timespan);
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    mDragTactileFeedbackStarted = true;
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  }
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}
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//-------------------------------------------------------------------------------
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//
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//   TouchTactileEffectOnRelease
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//--------------------------------------------------------------------------------
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//    
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void AlfScrollBarControl::TactileEffectOnRelease()    
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{
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	if (mTactilefdbInstance)
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	{
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	if ( mDragTactileFeedbackStarted )
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	    {
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	    	// Touch Release on Thumb after drag
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        CCoeControl* ccoecntrl = static_cast<CCoeControl*>(Display()->ObjectProvider());
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	    mTactilefdbInstance->StopFeedback(ccoecntrl);
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	    mDragTactileFeedbackStarted = false;
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	    }
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	else
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	    {
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	    // Touch Release on thumb	
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	    mTactilefdbInstance->InstantFeedback(ETouchFeedbackSlider);
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	    }
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	}
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}
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// ---------------------------------------------------------------------------
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//
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// getTactileFeedbackState
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// 
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// ---------------------------------------------------------------------------
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bool AlfScrollBarControl::IsTactileFeedbackEnabled()
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    {
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    return mEnableTactile;
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    }
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// ---------------------------------------------------------------------------
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// From Base class CAlfControl
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// Notifies the owner that the layout of a visual has been recalculated.
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// Called only when the EAlfVisualFlagLayoutUpdateNotification flag has
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// been set for the visual.
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// ---------------------------------------------------------------------------
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//
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void AlfScrollBarControl::VisualLayoutUpdated(CAlfVisual& aVisual)
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    {
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    if((mLayoutWidth == -1 && roundFloatToInt(
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        aVisual.Size().ValueNow().iX) == 0) ||
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        (mLayoutHeight == -1 && roundFloatToInt(
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            aVisual.Size().ValueNow().iY) == 0))
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        {
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        return; /*No size assigned yet*/
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        }
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    else
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        {
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        //do nothing
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        }   
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    if(mLayoutWidth == roundFloatToInt(aVisual.Size().ValueNow().iX)  && 
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        mLayoutHeight == roundFloatToInt(aVisual.Size().ValueNow().iY))
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        {
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        //return; /* No change in layout size */
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        }
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        else
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        {
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        //do nothing
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        }
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    mLayoutWidth = roundFloatToInt(aVisual.Size().ValueNow().iX);
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    mLayoutHeight = roundFloatToInt(aVisual.Size().ValueNow().iY);
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    IAlfElement* baseelement = findElement ("BaseElement");
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    IAlfScrollBarBaseElementInternal* elementInternal = NULL;
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    if(baseelement)
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	    {
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	    elementInternal = 
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	      static_cast<IAlfScrollBarBaseElementInternal*> (
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	      baseelement->makeInterface(IAlfScrollBarBaseElementInternal::type()));	
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	    }
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	else
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		{
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		// do nothing	
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		}
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    if(elementInternal)
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        {
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        elementInternal->baseLayoutSizeChanged();
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   194
        }
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   195
    else
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   196
        {
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        //do nothing
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   198
        }
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   199
    }
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// ---------------------------------------------------------------------------
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// Returns top level layout.
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// ---------------------------------------------------------------------------
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//
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CAlfLayout* AlfScrollBarControl::ContainerLayout(
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    const CAlfControl* /*aConnected*/) const
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    {
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    //Return the root layout of the control
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    return(static_cast<CAlfLayout*> (&Visual(0)));
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    }
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// ---------------------------------------------------------------------------
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// From base class CAlfWidgetControl
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// Handle Alfred events.
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// ---------------------------------------------------------------------------
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//
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AlfEventStatus AlfScrollBarControl::handleEvent( const TAlfEvent& aEvent )
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    {
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    IAlfElement *base = findElement("BaseElement");
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    if(aEvent.IsCustomEvent())
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        {
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        if(aEvent.CustomParameter() == EEventMissedPointerUp) 
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            {
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            if(base)
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            	{
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            	IAlfWidgetEventHandler* element = 
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	                    static_cast<IAlfWidgetEventHandler*> (
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	                        base->makeInterface(IAlfWidgetEventHandler::type()));
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	            if(element)
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		            {
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		            	element->offerEvent(*this,aEvent);
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		            }
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            	}
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            }
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        }
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    else if(aEvent.IsPointerEvent())
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        {
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        // if the type of base element is scrollbardefaultbaseelement, then
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        // convert the event to custom event
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        if(base)
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        	{
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	        if(base->makeInterface(
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	            IAlfScrollBarDefaultBaseElement::type()) != NULL)
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	            {
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	            TAlfEvent customevent(EEventScrollBarClicked,(TInt )&aEvent);
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	            return CAlfWidgetControl::processEvent(customevent);	            
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	            }
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	        else // other elements (like AlfElement) dont understand custom events
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	            { // Let them handle the original event in their own way
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	            return CAlfWidgetControl::handleEvent(aEvent);	                       
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		        }
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            }
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        }     
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    //ScrollBar should not handle any key event
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    else
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        { 
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        return EEventNotHandled;
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        }
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    return EEventNotHandled;
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    }
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    }//End of namespace Alf
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//End of File