author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 07:56:43 +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: Events generated by scrollers. |
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* |
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*/ |
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#ifndef T_ALFSCROLLEREVENT_H |
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#define T_ALFSCROLLEREVENT_H |
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|
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#include <e32std.h> |
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/** |
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* ScrollerEvent class. |
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* Usage: |
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* @code |
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* |
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* TBool CMyControl::OfferEventL(const TAlfEvent& aEvent) |
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* { |
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* TBool consumed(EFalse); |
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* if ( aEvent.IsPointerEvent() ) |
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* { |
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* CAlfVisual* visual = aEvent.Visual(); |
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* //Orientation for scroller |
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* TAlfScrollerEvent::TOrientation orientation = TAlfScrollerEvent::EVertical; |
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* |
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* if ( aEvent.PointerDown() ) |
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* { |
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* //if ( some condition to start scroller event handling ) |
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* { |
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* //Create event instance |
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* TAlfScrollerEvent scrollEvent(TAlfScrollerEvent::EMoveByItem, orientation, -1); |
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* TAlfEvent event( *(visual->Display()), scrollEvent ); |
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* //Pass it to handler |
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* scrollerInputHandler->OfferEventL( event ); |
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* consumed = ETrue; |
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* } |
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* } |
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* } |
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* return consumed; |
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* } |
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* @endcode |
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* @lib alfclient.lib |
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* @since S60 xxx |
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*/ |
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NONSHARABLE_CLASS( TAlfScrollerEvent ) |
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{ |
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|
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public: |
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/** |
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* Indicates what type of scroller the event originated in |
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*/ |
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enum TOrientation |
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{ |
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EVertical, |
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EHorizontal |
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}; |
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|
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/** |
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*Scroller event code |
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*/ |
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enum TCode |
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{ |
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EMoveByItem, // Moves the view by a single logical unit. i.e. a text line or a list item |
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EMoveByView, // Moves the view by an amount similar to a view height/width |
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EMoveToPosition // Moves the view top to the requested position |
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}; |
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public: |
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/* Constructors. */ |
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/** |
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* Constructor. |
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*/ |
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IMPORT_C TAlfScrollerEvent( TCode aCode, TOrientation aOrientation, TInt aMagnitude ); |
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/** |
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* Constructor. |
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* |
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* Supplied only for default construction within TAlfEvent |
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*/ |
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TAlfScrollerEvent(); |
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public: // Access methods |
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/** |
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* @return the event code for the scroller event |
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*/ |
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IMPORT_C TCode Code() const; |
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/** |
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* Orientation of the scroller |
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* |
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* @return orientation of the scroller generating this event |
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*/ |
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IMPORT_C TOrientation Orientation() const; |
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/** |
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* Access to the size of the scroller event. |
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* |
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* This magnitude represents the number of items, views, or other event code-dependent quantity |
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* |
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* For EMoveByItem, this number is the number of items to move forward. If negative, then it represents |
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* moving the view backward by this number of items. |
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* |
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* For EMoveByView, this number is the number of views forward to move. |
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* |
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* For EMoveToPosition, this number is in the arbitrary units of the associated scroller model. (i.e,.in order to |
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* generate this type of event you must be observing the corresponding @c MAlfScrollerModelReader ) |
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* |
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* @return the magnitude of the event |
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*/ |
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IMPORT_C TInt Magnitude() const; |
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private: |
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/** |
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* The scroller event code. |
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*/ |
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TCode iCode; |
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/** |
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* Orientation of this scroller |
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*/ |
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TOrientation iOrientation; |
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/** |
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* A magnitude representing the number of items, views, or other code-dependent quantity |
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* @see Magnitude() |
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*/ |
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TInt iMagnitude; |
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TInt iSpare; |
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}; |
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#endif // T_ALFSCROLLEREVENT_H |