emailuis/uicomponents/inc/fstextviewercontrol.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Thu, 17 Dec 2009 08:39:21 +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:  Control class for TextViewer component
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*
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*/
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#ifndef C_FSTEXTVIEWERCONTROL_H
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#define C_FSTEXTVIEWERCONTROL_H
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//<cmail> removed __FS_ALFRED_SUPPORT flag
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//#include <fsconfig.h>
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//</cmail> removed __FS_ALFRED_SUPPORT flag
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// <cmail> SF
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#include <alf/alfcontrol.h>
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#include <eiksbobs.h>                // MEikScrollBarObserver
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#include <aknphysicsobserveriface.h> // MAknPhysicsObserver
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// </cmail>
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#include "fstextviewerobserver.h"
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#include "fstextviewervisualizer.h"
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class CAknPhysics;
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class CFsTextViewerVisualizer;
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class MFsTextViewerObserver;
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class CFsTextViewerKeys;
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class CFsTextViewerControl :
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    public CAlfControl,
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    public MEikScrollBarObserver,
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    public MAknPhysicsObserver
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    {
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    public:
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        static CFsTextViewerControl* NewL( CAlfEnv& aEnv );
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        ~CFsTextViewerControl();
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    public:
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        void SetVisualizer( CFsTextViewerVisualizer* aVis );
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        void SetObserver( MFsTextViewerObserver* aObserver );
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        void EnableCursorScroll( TBool aStatus = ETrue );
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        TBool CursorScroll();
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        void SetKeys( CFsTextViewerKeys* aKeys );
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        CFsTextViewerKeys* Keys();
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        TBool IsScrollEventHandlingOngoing();
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        // Scroll specified offset, direction is calculated based on the
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        // given offset and view's current position.
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        void ScrollL(
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                const TInt aOffset,
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                const TInt aTime = CFsTextViewerVisualizer::EUseDefaultScrollTime );
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        // Scroll specified offset to specified direction. If aOffset is
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        // less than zero, scrolls default amount.
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        void ScrollL( 
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                const MFsTextViewerObserver::TFsTextViewerEvent aEventDirection,
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                const TInt aOffset = CFsTextViewerVisualizer::EUseDefaultScrollOffset,
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                const TInt aTime = CFsTextViewerVisualizer::EUseDefaultScrollTime );
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    protected:
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        /**
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         * From CAlfControl
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         */
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        void NotifyControlVisibility( TBool  aIsVisible, CAlfDisplay& aDisplay );
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    private:
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        CFsTextViewerControl(  );
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        void ConstructL( CAlfEnv& aEnv );
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    private:
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        TBool OfferEventL( const TAlfEvent& aEvent );
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        TBool HandleKeyEventL( const TAlfEvent& aEvent );
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        TBool HandlePointerEventL( const TAlfEvent& aEvent );
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        void UpdatePhysicsL();
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    public:
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        /**
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         * From MEikScrollBarObserver
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         * 
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         * Callback method for scroll bar events
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         *
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         * Scroll bar observer should implement this method to get scroll bar events.
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         *
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         * @since S60 0.9
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         * @param aScrollBar A pointer to scrollbar which created the event
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         * @param aEventType The event occured on the scroll bar
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         */
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        void HandleScrollEventL( CEikScrollBar* aScrollBar, TEikScrollEvent aEventType );
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    private: // from MAknPhysicsObserver
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       /**
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        * @see MAknPhysicsObserver::ViewPositionChanged
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        */
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       virtual void ViewPositionChanged( const TPoint& aNewPosition, TBool aDrawNow, TUint aFlags );
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       /**
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        * @see MAknPhysicsObserver::PhysicEmulationEnded
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        */
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       virtual void PhysicEmulationEnded();
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       /**
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        * @see MAknPhysicsObserver::ViewPosition
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        */
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       virtual TPoint ViewPosition() const;
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    private:
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        CFsTextViewerVisualizer* iVisualizer;
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        MFsTextViewerObserver* iObserver;
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        TBool iCursorUDScroll;
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        CFsTextViewerKeys* iKeys;
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        CAknPhysics* iPhysics;
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        TBool iScrollEventHandlingOngoing;
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        TBool iIsVisible;
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        TBool iStartHotspotAction;
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        TBool iIsDragging;
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        TBool iIsFlicking;
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        TPoint iPreviousPosition;
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        TPoint iOriginalPosition;
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        TTime iStartTime;
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    };
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#endif // C_FSTEXTVIEWERCONTROL_H
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