author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 14 Sep 2010 21:19:17 +0300 | |
branch | RCL_3 |
changeset 27 | 34937ec34dac |
parent 26 | 5b3385a43d68 |
permissions | -rw-r--r-- |
26 | 1 |
/* |
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* Copyright (c) 2008-2009 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: Carousel control class |
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* |
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*/ |
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#ifndef C_GLXCLOUDVIEWCONTROL_H |
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#define C_GLXCLOUDVIEWCONTROL_H |
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// INCLUDES |
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#include <alf/ialfwidgeteventhandler.h> |
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#include <osn/ustring.h> |
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#include <alf/alfscrollevents.h> |
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#include <alf/ialfscrollbarwidget.h> |
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//use includes |
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#include <mglxmedialistobserver.h> |
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#include "glxcontainerinfobubble.h" |
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#include "glxbubbletimer.h" //for timer functionality |
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#include "glxcloudinfo.h" |
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#include <alf/alfeventhandler.h> |
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#include <AknLayout2Def.h> |
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#include <aknphysicsobserveriface.h> //Physics - Kinetic scrolling listener |
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using namespace Alf; |
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// FORWARD DECLARATION |
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class MMPXViewUtility; |
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class MGlxUiCommandHandler; |
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class CAlfAnchorLayout; |
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class CAlfViewportLayout; |
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class CAlfControl; |
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class MGlxMediaList; |
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class CGlxDefaultAttributeContext; |
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class MMPXCollectionUtility; |
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class CGlxContainerInfoBubble; |
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class MTouchFeedback; |
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class MGlxCloudViewMskObserver; |
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class MGlxEnterKeyEventObserver; |
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class MGlxCloudViewLayoutObserver; |
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class CAknPhysics; |
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class CGlxTagsContextMenuControl ; |
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class MGlxItemMenuObserver; |
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enum TTagEventType |
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{ |
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ECustomEventFocusDragScroll |
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}; |
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/** |
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* CGlxCloudViewControl |
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* Alf-based Cloud control |
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* Creates a weighted list of items based on the associations. |
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* |
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*/ |
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class CGlxCloudViewControl : public CAlfControl,public IAlfWidgetEventHandler |
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,public MGlxMediaListObserver |
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,public MAknPhysicsObserver |
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,public MGlxTimerNotifier |
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{ |
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public: |
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/** |
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* Perform the two phase construction |
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* @param aEnv - Env Variable of Alf |
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* @param aEmptyText - Specifies the text for the empty list |
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* @param aMediaList - medialist from which attributes will be fetched |
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* @return Pointer to newly created object |
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*/ |
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static CGlxCloudViewControl *NewL(CAlfDisplay& aDisplay, CAlfEnv &aEnv, |
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MGlxMediaList& aMediaList, const TDesC& aEmptyText |
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,MGlxCloudViewMskObserver& aObserver |
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,MGlxEnterKeyEventObserver& aObserverEnterKeyEvent, |
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CAlfAnchorLayout *aAnchorLayout, |
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MGlxCloudViewLayoutObserver& aLayoutObserver |
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,MGlxItemMenuObserver& aItemMenuObserver); |
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/** |
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* Perform the two phase construction |
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* @param aEnv - Env Variable of Alf |
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* @param aEmptyText - Specifies the text for the empty list |
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* @param aMediaList - medialist from which attributes will be fetched |
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* @return Pointer to newly created object |
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*/ |
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static CGlxCloudViewControl *NewLC(CAlfDisplay& aDisplay, CAlfEnv &aEnv, |
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MGlxMediaList& aMediaList, const TDesC& aEmptyText |
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,MGlxCloudViewMskObserver& aObserver |
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,MGlxEnterKeyEventObserver& aObserverEnterKeyEvent, |
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CAlfAnchorLayout *aAnchorLayout,MGlxCloudViewLayoutObserver& aLayoutObserver |
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,MGlxItemMenuObserver& aItemMenuObserver); |
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/** |
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* Destroy the object and release all memory objects |
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*/ |
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~CGlxCloudViewControl(); |
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public: |
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/** |
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* Used to identify event handlers that are capable of handling |
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* a specified key or custom event. Pointer event handlers cannot be |
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* identified directly, since they are dependent on the presentation. |
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* Therefore, pointer event handlers should be associated with |
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* a custom event ID that can be used to simulate the actual pointer event. |
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* |
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* @since S60 ?S60_version |
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* @param aEvent The event. |
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* @return <code>ETrue</code> if the event can be processed. Otherwise <code>EFalse</code>. |
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*/ |
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bool accept ( CAlfWidgetControl& aControl, const TAlfEvent& aEvent ) const; |
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/** |
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* @see IAlfWidgetEventHandler |
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*/ |
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virtual AlfEventStatus offerEvent ( CAlfWidgetControl& aControl, const TAlfEvent& aEvent ); |
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/** |
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* Sets AlfWidgetEventHandlerInitData to event handler. |
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* |
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* @param aData A data structure which contains for example id of the event |
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* handler. |
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*/ |
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virtual void setEventHandlerData( const AlfWidgetEventHandlerInitData& /*aData*/ ) |
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{ |
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} |
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/** |
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* Defines the widget states, where the event handler is active. |
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* By default, if this method is not called, the event handler is expected |
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* to be active in all states. |
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* |
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* @param aStates A bitmask defining the widget states, where the event |
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* handler is active. The low 16 bits are reserved for the states |
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* defined by the framework in <TODO: add reference>. The high 16 bits are |
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* available for states defined by the client code. |
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*/ |
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void setActiveStates ( unsigned int aStates ); |
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IAlfInterfaceBase* makeInterface ( const IfId& aType ); |
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/** |
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* Returns the type of EventHandler. |
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* @see IAlfWidgetEventHandler::AlfEventHandlerType |
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* |
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* @return The type of event handler. |
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*/ |
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AlfEventHandlerType eventHandlerType(); |
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/** |
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* Returns information about the phase in the event handling cycle in |
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* which the event hadler will be executed. |
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* @see IAlfWidgetEventHandler::AlfEventHandlerExecutionPhase |
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* |
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* @return Event handler execution phase. |
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*/ |
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AlfEventHandlerExecutionPhase eventExecutionPhase(); |
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/** |
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* Returns AlfWidgetEventHandlerInitData. |
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* |
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* @return A pointer to AlfWidgetEventHandlerInitData structure which contains |
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* for example id of the event handler. |
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*/ |
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virtual AlfWidgetEventHandlerInitData* eventHandlerData() |
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{ |
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return NULL; |
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} |
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/** |
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* initialises data for scrollbar model |
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* @param scrollbar widget |
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*/ |
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void InitializeScrollBar(IAlfScrollBarWidget* aScrollBarWidget); |
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/** |
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* Hides/shows the grid layout |
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* @param aShow - Show value |
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*/ |
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void ShowContextItemMenuL(TBool aShow); |
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public://MGlxTimernotifier |
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/** |
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* Virtual Function from MGlxTimernotifier |
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*/ |
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void TimerCompleteL(); |
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private: |
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/** |
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* Perform the two phase construction |
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* @param aEvent - key Event to handle |
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* @return EKeyWasConsumed if key event is processed, |
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* otherwise EKeyWasNotConsumed |
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*/ |
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TBool OfferEventL(const TAlfEvent &aEvent); |
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/** |
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* @function HandleKeyUp |
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* |
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*/ |
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void HandleKeyUpL(); |
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/** |
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* @since S60 3.2 |
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* |
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*/ |
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void HandleLayoutFocusChange(); |
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/** |
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* @since S60 3.2 |
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* |
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*/ |
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void HandleKeyDownL(); |
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/** |
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/** |
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* @since S60 3.2 |
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* |
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*/ |
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void UpdateLayout(); |
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/** |
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* Displays the empty cloud view when there are no tags to diplay |
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*/ |
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void DisplayEmptyCloudViewL(); |
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/** |
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* constructor |
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* @param aEnv - Env Variable of Alf |
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* @param aMediaList - medialist from which attributes will be fetched |
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* @param aMediaList - medialist from which attributes will be fetched |
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*/ |
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CGlxCloudViewControl(CAlfEnv &aEnv, |
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MGlxMediaList& aMediaList,MGlxCloudViewMskObserver& aObserver,MGlxEnterKeyEventObserver& aObserverEnterKeyEvent |
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,MGlxCloudViewLayoutObserver& aLayoutObserver); |
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/** |
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* Perform the two phase construction |
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* @param aStartPoint - start point for draeing the row |
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* @param aRowHeight - height of the row |
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* @param aRowStartIndex - start index of row |
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* @param aRowEndIndex- Index upto which items will be drawn |
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* @return |
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*/ |
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TInt LayoutVisibleRows(TPoint aStartPoint,TInt aRowStartIndex, TInt |
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aRowEndIndex); |
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/** |
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* Perform the two phase construction |
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* @param aStartRowIndex - row index |
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* @return |
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*/ |
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void LayoutVisibleArea(/*TInt aStartRowIndex*/); |
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/** |
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* returns the rownumber for a particular index. |
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* @param aItemIndex - row index |
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* @return rownum |
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*/ |
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TInt RowNumber(TInt aItemIndex) const; |
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/** |
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* Updates the focus whenever there is a change in focus of the item. |
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*/ |
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void FocusUpdate(); |
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/** |
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* Perform the second phase of two phase construction |
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* @param aEmptyText - Specifies the text for the empty list |
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*/ |
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void ConstructL(const TDesC& aEmptyText,CAlfDisplay& aDisplay, |
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CAlfAnchorLayout *aAnchorLayout,MGlxItemMenuObserver& aItemMenuObserver); |
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/** |
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* Updates Row Structure |
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* |
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*/ |
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void UpdateRowDataL(); |
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/** |
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* Returns maximum value of usage Count |
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* |
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*/ |
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TInt MaxUsageCount(); |
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/** |
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* @param aIndex - Media List Index |
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* Returns usage count for a given index |
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* */ |
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TInt UsageCount(TInt aIndex); |
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/** |
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* @function FetchAttributeFromCacheL |
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* |
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* */ |
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void FetchAttributeFromCacheL(); |
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/** |
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* Utility method to add a TGlxCloudInfo struct into iCloudInfo array |
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* @param aCloudInfo The next item to add into iCloudinfo |
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* @param aRowHeight value of aCloudInfo.iRowHeight |
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* @param aStartIndex value of aCloudInfo.iStartIndex |
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* @param aEndIndex value of aCloudInfo.iEndIndex |
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* */ |
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void AppendToCloudArrayL( TGlxCloudInfo& aCloudInfo, |
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const TInt& aStartIndex, const TInt& aEndIndex ); |
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private: // from MAknPhysicsObserver |
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/* |
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* Observer to get notified about new position to be displayed in |
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* @param aNewPosition The new point where the virtual port should start from |
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* @param aDrawNow value to determine whether to draw at new position or not |
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* @param aFags Special value (not used here) |
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*/ |
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void ViewPositionChanged( const TPoint& aNewPosition, TBool aDrawNow, TUint /*aFlags*/ ); |
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/* |
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* Obsrever to get notified whether the physics emulation ended |
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*/ |
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void PhysicEmulationEnded(); |
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/* |
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* Observer callback used by CAknPhysics to know our current viewposition |
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* (which is with reference to displayable viewportposition + screeenheight/2) |
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* Returns current viewposition point |
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*/ |
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TPoint ViewPosition() const; |
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private: |
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TBool IsLandscape(); |
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/* |
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* Initializes the physcs library with total size, displayable size, etc |
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*/ |
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void InitPhysicsL(); |
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/** |
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* Sets focused item color |
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**/ |
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void SetFocusColor(); |
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34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
26
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/** |
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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* Resets focused item color |
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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**/ |
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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void ResetFocusColor(); |
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Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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/** |
34937ec34dac
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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* Set the focus to first visible item |
34937ec34dac
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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* in the current view position |
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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*/ |
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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void SetFocusToFirstVisibleItemL(); |
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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/** |
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* Move the viewport up depending on the condition |
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* |
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**/ |
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void MoveUpIfRequired(); |
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/** |
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* Move the viewport down depending on the condition |
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**/ |
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void MoveDownIfRequired(); |
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public: |
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void HandleItemAddedL(TInt aStartIndex, TInt aEndIndex, |
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MGlxMediaList* aList); |
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/** |
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* Notification that media object is now available for an item |
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* @param Index of the item |
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* @param aList List that this callback relates to |
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*/ |
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void HandleMediaL(TInt aListIndex, MGlxMediaList* aList); |
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/** |
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* Notification that media item was removed from the list |
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* @param aStartIndex First item that was removed |
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* @param aEndIndex Last item that was removed |
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* @param aList List that this callback relates to |
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*/ |
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void HandleItemRemovedL(TInt aStartIndex, TInt aEndIndex, |
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MGlxMediaList* aList); |
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/** |
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* Notification that media item was changed |
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* @param aItemIndexes Indexes of items that were changed |
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* @param aList List that this callback relates to |
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*/ |
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void HandleItemModifiedL(const RArray<TInt>& aItemIndexes, |
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MGlxMediaList* aList); |
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/** |
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* Notification that an attribute is available |
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* @param aItemIndex Index of the for which the thumbnail is available |
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* @param aAttributes Array of attributes that have become available |
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* @param aList List that this callback relates to |
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*/ |
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void HandleAttributesAvailableL(TInt aItemIndex, |
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const RArray<TMPXAttribute>& aAttributes, MGlxMediaList* aList); |
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/** |
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* Notification that focus has moved |
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* @param aType the direction of the focus change |
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* @param aNewIndex the new index after the focus change |
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* @param aOldIndex the old index before the focus change |
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* @param aList List that this callback relates to |
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*/ |
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void HandleFocusChangedL(NGlxListDefs::TFocusChangeType aType, TInt aNewIndex, |
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TInt aOldIndex, MGlxMediaList* aList); |
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/** |
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* Notification that an item has been selected/deselected |
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* @param aIndex Index of the item that has been selected/deselected |
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* @param aSelected Boolean to indicate selection/deselection |
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* @param aList List that the selection relates to |
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*/ |
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void HandleItemSelectedL(TInt aIndex, TBool aSelected, MGlxMediaList* aList); |
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/** |
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* Notification from the collection. E.g. Items added/modified/deleted and progress notifications |
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* @param aMessage Message notification from the collection |
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* @param aList List that the notification relates to |
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*/ |
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void HandleMessageL(const CMPXMessage& aMessage, MGlxMediaList* aList); |
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/** |
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* Notification from the collection that the medialist is populated |
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* @param aList List that the notification relates to |
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*/ |
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void HandlePopulatedL(MGlxMediaList* /*aList*/); |
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/** |
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* Notification from the collection. E.g. Items added/modified/deleted and progress notifications |
|
462 |
* @param aIndex Index of the item for which property needs to be set |
|
463 |
* @param aScale Scale parameter to decide the properties of item |
|
464 |
*/ |
|
465 |
void SetPropertiesL(TInt aIndex, TInt aScale); |
|
466 |
||
467 |
/** |
|
468 |
* Called whenever the resolution is changed |
|
469 |
*/ |
|
470 |
void VisualLayoutUpdated(CAlfVisual & aVisual); |
|
471 |
||
472 |
private: |
|
473 |
||
474 |
/** |
|
475 |
* Handle the pointer event |
|
476 |
* @param aEvent event describing the gesture |
|
477 |
*/ |
|
478 |
TBool HandlePointerEventL( const TAlfEvent &aEvent ); |
|
479 |
||
480 |
/** |
|
481 |
* Handles the drag events |
|
482 |
* @param pointer event generated because of drag |
|
483 |
* @return returns whether the pointer event is consumed or not |
|
484 |
*/ |
|
485 |
TBool HandleDragL(const TPointerEvent& aPointerEvent); |
|
486 |
||
487 |
/** |
|
488 |
* checks the visual on which the drag event is generated |
|
489 |
* @param position where the drag event has ocuured |
|
490 |
* @return the index of the visual that needs to be focused |
|
491 |
*/ |
|
492 |
TInt GetAbsoluteIndex(const TPoint& aPosition); |
|
493 |
||
494 |
/** |
|
495 |
* Checks which visual lies below/above the focused item and sets the focus |
|
496 |
* @param the row number that needs to be checked for getting the overlaping visual |
|
497 |
*/ |
|
498 |
void SetRelativeFocusL(TInt aRowNumber); |
|
499 |
||
500 |
/** |
|
501 |
* Updates layout when orientation is changed |
|
502 |
*/ |
|
503 |
void UpdateLayoutL(); |
|
504 |
||
505 |
private: |
|
506 |
/** |
|
507 |
* Send the scroll custom event to scrollbar widget |
|
508 |
*/ |
|
509 |
void Scroll(); |
|
510 |
||
511 |
/** |
|
512 |
* decide the scrollbar new position |
|
513 |
* @param number of steps which is used to determine the amout to be scrolled |
|
514 |
*/ |
|
515 |
void UpdateScrollBar(TInt aNumberOfSteps, TBool aDiff = ETrue); |
|
516 |
||
517 |
/** |
|
518 |
* Display the scrollbar only if there are items |
|
519 |
* @param visibility |
|
520 |
*/ |
|
521 |
void DisplayScrollBar(); |
|
522 |
||
523 |
private: |
|
524 |
||
525 |
// The Alf Environment |
|
526 |
CAlfEnv& iEnv; |
|
527 |
||
528 |
//Parent layout for viewportayout |
|
529 |
CAlfAnchorLayout* iViewPortParentLayout; |
|
530 |
||
531 |
//ViewPortLayout |
|
532 |
CAlfViewportLayout* iViewPortLayout; |
|
533 |
||
534 |
//Anchor layout for tags |
|
535 |
CAlfAnchorLayout *iLayout; |
|
536 |
||
537 |
//medialist not owned |
|
538 |
MGlxMediaList& iMediaList; |
|
539 |
||
540 |
//Array of Cloud visuals. |
|
541 |
RPointerArray <CAlfTextVisual> iLabels; |
|
542 |
||
543 |
// Array for information of cloud visuals. |
|
544 |
RArray <TGlxCloudInfo> iCloudInfo; |
|
545 |
||
546 |
//Ui Utility |
|
547 |
CGlxUiUtility* iUiUtility; |
|
548 |
||
549 |
// Visual for empty string display |
|
550 |
CAlfTextVisual *iEmptyString; |
|
551 |
||
552 |
// FocusIndex keeps track of the focussed item |
|
553 |
TInt iScrollDirection; |
|
554 |
||
555 |
// FocusIndex keeps track of the focussed row |
|
556 |
TInt iFocusRowIndex; |
|
557 |
||
558 |
//keeps track of the end row |
|
559 |
TInt iLayoutIndex; |
|
560 |
||
561 |
// Fetch context for list item attributes |
|
562 |
CGlxDefaultAttributeContext* iAttributeContext; |
|
563 |
||
564 |
// for storing screen height |
|
565 |
TInt iScreenHeight; |
|
566 |
||
567 |
// List event observer |
|
568 |
MGlxCloudViewMskObserver& iObserver; |
|
569 |
||
570 |
// stores the text for empty view |
|
571 |
HBufC* iEmptyText; |
|
572 |
||
573 |
//Viewport position |
|
574 |
TAlfRealPoint iViewPortPosition; |
|
575 |
||
576 |
//observer to inform "open" command cloudviewimp class so that it opens the next view |
|
577 |
MGlxEnterKeyEventObserver& iObserverEnterKeyEvent; |
|
578 |
||
579 |
//observer to inform command cloudviewimp class that layout is changed |
|
580 |
MGlxCloudViewLayoutObserver& iLayoutObserver; |
|
581 |
//Viewport size |
|
582 |
TAlfRealSize iViewPortSize; |
|
583 |
||
584 |
//Viewport virtual size |
|
585 |
TAlfRealSize iViewPortVirtualSize; |
|
586 |
||
587 |
//Width of the screen in which is available for tags to fit in |
|
588 |
TInt iTagScreenWidth; |
|
589 |
||
590 |
//Height of the screen in which is available for tags to fit in |
|
591 |
TInt iTagScreenHeight; |
|
592 |
||
593 |
//Touch feedback instance |
|
594 |
MTouchFeedback* iTouchFeedback; |
|
595 |
||
596 |
//parent layout for all the layout's |
|
597 |
CAlfLayout* iParentLayout; |
|
598 |
||
599 |
//data structure for scrollbar |
|
600 |
ScrollModelChangedEventData iScrollEventData; |
|
601 |
||
602 |
//scrollbar element |
|
603 |
IAlfWidgetEventHandler *iScrollbarElement; |
|
604 |
||
605 |
//scrollbar widget |
|
606 |
IAlfScrollBarWidget *iScrollBarWidget; |
|
607 |
||
608 |
//direction of dragging |
|
609 |
TInt iIsDragging; |
|
610 |
||
611 |
TAknWindowLineLayout iScrollPaneHandle; |
|
612 |
||
613 |
//View position w.r.t. viewportposition + (screeenwidth/2, screenheight/2) |
|
614 |
TPoint iViewPosition; |
|
615 |
||
616 |
//determins whether dragging is currently going on or not |
|
617 |
TBool iDragging; |
|
618 |
||
619 |
//Notes the time before dragging, when pointer down event happens |
|
620 |
TTime iStartTime; |
|
621 |
||
622 |
//Notes the last pointer co-ordinates |
|
623 |
TPoint iPrev; |
|
624 |
||
625 |
//The pointer coordinates before dragging when pointerDown event happened |
|
626 |
TPoint iStart; |
|
627 |
||
628 |
//owning - Physics library object |
|
629 |
CAknPhysics* iPhysics; |
|
630 |
||
631 |
//boolean to check whether physics emulation is going on or not |
|
632 |
TBool iPhysicsStarted; |
|
633 |
||
634 |
//boolean to check if dragging really happened |
|
635 |
TBool iViewDragged; |
|
636 |
||
637 |
/**variable used for providing delay */ |
|
638 |
CGlxBubbleTimer* iTimer; |
|
639 |
||
640 |
//Alfcontrol to draw grid layout for handling floating bar menu items |
|
641 |
CGlxTagsContextMenuControl* iTagsContextMenuControl; |
|
642 |
||
643 |
/**flag for Timer completion */ |
|
644 |
TBool iTimerComplete; |
|
645 |
||
646 |
/**flag to identify the next down event */ |
|
647 |
TBool iDownEventReceived; |
|
27
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
26
diff
changeset
|
648 |
|
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
26
diff
changeset
|
649 |
// Flag to show Alf visual focus |
34937ec34dac
Revision: 201033
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
26
diff
changeset
|
650 |
TBool iShowFocus; |
26 | 651 |
}; |
652 |
||
653 |
#endif // C_GLXCLOUDVIEWCONTROL_H |
|
654 |