author | William Roberts <williamr@symbian.org> |
Thu, 08 Apr 2010 20:18:37 +0100 | |
branch | CompilerCompatibility |
changeset 20 | d1bdfdf534bd |
parent 2 | 7d9067c6fcb1 |
child 14 | ce1c7ad1f18b |
permissions | -rw-r--r-- |
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/* |
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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: Navigational state of the app |
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* |
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*/ |
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#include "glxnavigationalstate.h" |
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#include <glxassert.h> |
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#include <glxsingletonstore.h> |
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#include <mpxcollectionobserver.h> |
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#include <mpxcollectionmessage.h> |
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#include <mpxcollectionpath.h> |
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#include <mpxcollectionutility.h> |
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#include <mpxmessagegeneraldefs.h> |
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#include <mpxviewutility.h> // MMPXViewUtility |
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#include "mglxnavigationalstateobserver.h" |
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#include <eikappui.h> |
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#include <eikenv.h> |
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|
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#include <glxtracer.h> |
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#include <glxlog.h> |
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|
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/** |
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* CGlxNavigationalStateImp |
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* |
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* Implementation of navigational state |
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* Note: function entry-exit logging is in CGlxNavigationalState, |
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* not in CGlxNavigationalStateImp. |
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* |
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* @author Aki Vanhatalo |
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*/ |
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class CGlxNavigationalStateImp : public CBase, public MMPXCollectionObserver |
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{ |
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public: |
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/** |
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* Second-phase constructor |
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* inlined since used only once from CGlxNavigationalState |
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*/ |
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inline void ConstructL() |
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{ |
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iCollectionUtility = MMPXCollectionUtility::NewL( this ); |
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iViewUtility = MMPXViewUtility::UtilityL(); |
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iViewingMode = NGlxNavigationalState::EBrowse; |
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} |
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/** Destructor */ |
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~CGlxNavigationalStateImp() |
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{ |
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GLX_LOG_ENTRY_EXIT( "CGlxNavigationalStateImp::~CGlxNavigationalStateImp"); |
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if ( iCollectionUtility ) |
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{ |
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iCollectionUtility->Close(); |
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} |
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if ( iViewUtility ) |
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{ |
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iViewUtility->Close(); |
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} |
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// Log a warning if observers remaining; they should have been removed by the client |
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__ASSERT_DEBUG( !iObservers.Count(), |
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GLX_LOG_WARNING1( "CGlxNavigationalStateImp - %d observers not removed", iObservers.Count() ) ); |
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iObservers.Close(); |
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} |
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|
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/** |
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* Add an observer |
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* inlined since used only once from CGlxNavigationalState |
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* @param aObserver Observer of changes to state |
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*/ |
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inline void AddObserverL( MGlxNavigationalStateObserver& aObserver ) |
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{ |
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GLX_LOG_INFO1("CGlxNavigationalStateImp::AddObserverL %x", &aObserver); |
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__ASSERT_DEBUG( KErrNotFound == iObservers.Find( &aObserver ), |
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GLX_LOG_WARNING( "CGlxNavigationalStateImp - Observer already added" ) ); |
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// Add the observer, unless already added |
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if ( KErrNotFound == iObservers.Find( &aObserver ) ) |
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{ |
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iObservers.AppendL( &aObserver ); |
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} |
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} |
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/** |
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* Remove an observer |
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* inlined since used only once from CGlxNavigationalState |
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* @param aObserver Observer to remove |
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*/ |
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inline void RemoveObserver( MGlxNavigationalStateObserver& aObserver ) |
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106 |
{ |
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GLX_LOG_INFO1("CGlxNavigationalStateImp::RemoveObserver %x", &aObserver); |
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108 |
|
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// Remove the observer if exists |
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TInt index = iObservers.Find( &aObserver ); |
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if ( KErrNotFound != index ) |
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112 |
{ |
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iObservers.Remove( index ); |
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} |
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115 |
|
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__ASSERT_DEBUG( KErrNotFound != index, |
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GLX_LOG_WARNING( "CGlxNavigationalStateImp - No such observer to remove" ) ); |
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} |
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119 |
|
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120 |
/** |
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* @return the current navigational state. Caller gets ownership. |
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*/ |
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CMPXCollectionPath* StateLC() const |
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{ |
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GLX_LOG_ENTRY_EXIT("CGlxNavigationalStateImp::StateLC"); |
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126 |
|
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// state is stored in the collection utility as a collection path |
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CMPXCollectionPath* state = Collection().PathL(); |
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CleanupStack::PushL( state ); |
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130 |
|
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// go up one level in hierarchy, since the path contains also the |
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// currently open level, not only the nodes to the level |
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state->Back(); |
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134 |
|
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return state; |
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} |
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137 |
|
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138 |
/** |
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* Navigate back in the UI hierarchy |
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* Does nothing, if currently at root. |
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*/ |
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inline void NavigateToParentL() |
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143 |
{ |
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if ( ViewingMode()== NGlxNavigationalState::EView ) |
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145 |
{ |
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iViewingMode = NGlxNavigationalState::EBrowse; |
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//Collection().BackL(); // added by gopakumar |
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NotifyObserversOfStateChange(); |
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} |
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else |
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151 |
{ |
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Collection().BackL(); |
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} |
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} |
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|
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/** |
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* Navigate forward to provided item |
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* @param aItemToOpen Id of item to navigate to |
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*/ |
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void NavigateToChildL( const TGlxMediaId& aItemIdToOpen ) |
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161 |
{ |
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// there is no way to open MPX collection utility's current state with |
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// and id of a child item, so create a full path object and add the |
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// requested item's id as the new level |
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iViewingMode = NGlxNavigationalState::EBrowse; |
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CMPXCollectionPath* state = StateLC(); |
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state->AppendL( aItemIdToOpen.Value() ); |
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|
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NavigateToL( *state ); |
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|
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CleanupStack::PopAndDestroy( state ); |
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} |
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173 |
|
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/** |
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* Navigate to provided position in hierarchy |
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* @param aNewState Path object which describes the new position in hierarchy |
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*/ |
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inline void NavigateToL( const CMPXCollectionPath& aNewState ) |
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{ |
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// (it does not matter that the root level is opened without |
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// gallery plugin filter (EGlxCollectionPluginGallery), as long as |
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// the root level is *rendered* with something that uses the filter, |
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// such as a media list) |
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if(!iIsNavigating) |
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{ |
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iViewingMode = NGlxNavigationalState::EBrowse; |
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Collection().OpenL( aNewState ); |
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iIsNavigating = ETrue; |
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} |
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} |
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191 |
|
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// commented off by gopakumar , as this is no longer needed . |
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/** |
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* Set the ID of the view that will be activated if there are no other |
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* view's in the view history |
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*/ |
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/*inline void SetFirstViewId( TVwsViewId aViewId ) |
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{ |
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// Save the view Id |
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iViewId = aViewId; |
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}*/ |
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|
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/** |
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* Activate previous view |
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*/ |
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inline void ActivatePreviousViewL() |
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207 |
{ |
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iViewingMode = NGlxNavigationalState::EBrowse; |
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//go back one view |
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if ( iViewUtility->ViewHistoryDepth() > 1 ) |
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{ |
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iViewUtility->ActivatePreviousViewL(); |
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} |
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} |
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|
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// From MMPXCollectionObserver |
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void HandleCollectionMessageL( const CMPXMessage& aMessage ) |
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{ |
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TRACER( "CGlxNavigationalStateImp::HandleCollectionMessageL" ); |
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|
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if ( IsPathChangedMessage( aMessage ) ) |
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{ |
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NotifyObserversOfStateChange(); |
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iIsNavigating = EFalse; |
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} |
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} |
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|
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// From MMPXCollectionObserver |
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void HandleOpenL( const CMPXMedia& /*aEntries*/, TInt /*aIndex*/, |
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TBool /*aComplete*/, TInt /*aError*/ ) |
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{ |
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// do nothing |
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} |
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|
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// From MMPXCollectionObserver |
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void HandleOpenL( const CMPXCollectionPlaylist& /*aPlaylist*/, TInt /*aError*/ ) |
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{ |
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// do nothing |
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} |
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|
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// From MMPXCollectionObserver |
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void HandleCollectionMediaL( const CMPXMedia& /*aMedia*/, TInt /*aError*/ ) |
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{ |
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// do nothing |
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} |
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void SetToViewMode() |
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{ |
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iViewingMode = NGlxNavigationalState::EView; |
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// inform the observers( only appui!! ) that the mode is view |
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NotifyObserversOfStateChange(); |
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|
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} |
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NGlxNavigationalState::TViewingMode ViewingMode() |
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{ |
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return iViewingMode; |
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} |
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|
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private: |
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/** Notify observers of state change */ |
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inline void NotifyObserversOfStateChange() |
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{ |
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GLX_LOG_ENTRY_EXIT( "CGlxNavigationalStateImp::NotifyObserversOfStateChange" ); |
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// iObservers::Count() used in loop: ok, since unlikely to have many observers |
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for ( TInt i = 0; i < iObservers.Count(); i++ ) |
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{ |
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iObservers[ i ]->HandleNavigationalStateChangedL(); |
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} |
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} |
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|
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/** @return MPX collection */ |
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inline MMPXCollection& Collection() const |
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{ |
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return iCollectionUtility->Collection(); |
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} |
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|
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/** |
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* @param aMessage message to test |
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* @return ETrue if the message is a "path changed" message |
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*/ |
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inline TBool IsPathChangedMessage( const CMPXMessage& aMessage ) |
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{ |
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// message is a "path changed" message if message id is KMPXMessageGeneral |
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// and KMPXMessageGeneralEvent attribute is EPathChanged |
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return ( aMessage.IsSupported(KMPXMessageGeneralId ) |
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&& KMPXMessageGeneral == aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralId ) |
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&& aMessage.IsSupported( KMPXMessageGeneralEvent ) |
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&& TMPXCollectionMessage::EPathChanged == aMessage.ValueTObjectL<TInt>( KMPXMessageGeneralEvent ) ); |
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} |
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|
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private: |
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/// Collection utility that stores the path to represent current navigational |
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/// state |
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MMPXCollectionUtility* iCollectionUtility; |
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MMPXViewUtility* iViewUtility; |
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NGlxNavigationalState::TViewingMode iViewingMode; |
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// commented off by gopakumar as this is not used anymore |
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// TVwsViewId iViewId; |
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/// List of observers |
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RPointerArray< MGlxNavigationalStateObserver > iObservers; |
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|
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TBool iIsNavigating; // If ETrue it means Navigating is already happening, so not allowed to navigate before current navigation Completes. |
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// If EFalse it means Navigation can happen |
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|
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}; |
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|
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// ----------------------------------------------------------------------------- |
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// InstanceL |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C CGlxNavigationalState* CGlxNavigationalState::InstanceL() |
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{ |
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GLX_LOG_INFO( "CGlxNavigationalState::InstanceL" ); |
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return CGlxSingletonStore::InstanceL( &NewL ); |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// NewL |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxNavigationalState* CGlxNavigationalState::NewL() |
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{ |
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GLX_LOG_INFO( "CGlxNavigationalState::NewL" ); |
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CGlxNavigationalState* self = new ( ELeave ) CGlxNavigationalState; |
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CleanupStack::PushL( self ); |
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|
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// Construct implementation object |
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self->iImp = new ( ELeave ) CGlxNavigationalStateImp; |
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self->iImp->ConstructL(); |
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|
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CleanupStack::Pop( self ); |
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return self; |
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} |
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335 |
|
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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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CGlxNavigationalState::~CGlxNavigationalState() |
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{ |
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delete iImp; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Close a reference |
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// ----------------------------------------------------------------------------- |
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349 |
// |
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EXPORT_C void CGlxNavigationalState::Close() |
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351 |
{ |
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GLX_LOG_ENTRY_EXIT( "CGlxNavigationalState::Close"); |
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353 |
|
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// Decrease reference count, and delete if last one |
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CGlxSingletonStore::Close( this ); |
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// Member variable access not safe after CGlxSingletonStore::Close() |
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} |
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358 |
|
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// ----------------------------------------------------------------------------- |
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// Close a reference |
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// ----------------------------------------------------------------------------- |
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362 |
// |
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EXPORT_C void CGlxNavigationalState::AddObserverL( |
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MGlxNavigationalStateObserver& aObserver ) |
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365 |
{ |
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GLX_LOG_INFO1( "CGlxNavigationalState::AddObserverL %x", &aObserver ); |
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iImp->AddObserverL( aObserver ); |
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} |
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369 |
|
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// ----------------------------------------------------------------------------- |
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// Close a reference |
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// ----------------------------------------------------------------------------- |
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373 |
// |
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EXPORT_C void CGlxNavigationalState::RemoveObserver( |
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MGlxNavigationalStateObserver& aObserver ) |
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376 |
{ |
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GLX_LOG_INFO1( "CGlxNavigationalState::RemoveObserver %x", &aObserver ); |
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iImp->RemoveObserver( aObserver ); |
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379 |
} |
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380 |
|
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381 |
// ----------------------------------------------------------------------------- |
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382 |
// Close a reference |
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383 |
// ----------------------------------------------------------------------------- |
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384 |
// |
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EXPORT_C CMPXCollectionPath* CGlxNavigationalState::StateLC() const |
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386 |
{ |
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|
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GLX_LOG_ENTRY_EXIT( "CGlxNavigationalState::StateLC" ); |
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return iImp->StateLC(); |
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389 |
} |
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|
390 |
|
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391 |
// ----------------------------------------------------------------------------- |
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392 |
// Navigate to parent item |
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393 |
// ----------------------------------------------------------------------------- |
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394 |
// |
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395 |
EXPORT_C void CGlxNavigationalState::NavigateToParentL() |
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396 |
{ |
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|
397 |
GLX_LOG_ENTRY_EXIT( "CGlxNavigationalState::NavigateToParentL" ); |
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398 |
iImp->NavigateToParentL(); |
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|
399 |
} |
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|
400 |
|
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|
401 |
// ----------------------------------------------------------------------------- |
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402 |
// Navigate to a child item |
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|
403 |
// ----------------------------------------------------------------------------- |
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|
404 |
// |
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405 |
EXPORT_C void CGlxNavigationalState::NavigateToChildL( |
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|
406 |
const TGlxMediaId& aItemIdToOpen ) |
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407 |
{ |
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|
408 |
// GLX_LOG_INFO1( "CGlxNavigationalState::NavigateToChildL %d", aItemIdToOpen.Value() ); |
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|
409 |
iImp->NavigateToChildL( aItemIdToOpen ); |
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|
410 |
} |
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|
411 |
|
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412 |
// ----------------------------------------------------------------------------- |
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413 |
// Navigate to a path |
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414 |
// ----------------------------------------------------------------------------- |
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|
415 |
// |
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|
416 |
EXPORT_C void CGlxNavigationalState::NavigateToL( const CMPXCollectionPath& aState ) |
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417 |
{ |
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GLX_LOG_ENTRY_EXIT( "CGlxNavigationalState::NavigateToL"); |
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iImp->NavigateToL( aState ); |
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} |
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// ----------------------------------------------------------------------------- |
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// Activate previous view |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxNavigationalState::ActivatePreviousViewL() |
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{ |
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GLX_LOG_ENTRY_EXIT( "CGlxNavigationalState::ActivatePreviousViewL"); |
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iImp->ActivatePreviousViewL(); |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Set the ViewingMode |
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// ----------------------------------------------------------------------------- |
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// |
0
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EXPORT_C void CGlxNavigationalState::SetToViewMode() |
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{ |
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iImp->SetToViewMode(); |
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// inform the observers( only appui!! ) that the mode is view |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Get the ViewingMode |
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// ----------------------------------------------------------------------------- |
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// |
0
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EXPORT_C NGlxNavigationalState::TViewingMode CGlxNavigationalState::ViewingMode() |
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{ |
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return iImp->ViewingMode(); |
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} |
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// ----------------------------------------------------------------------------- |
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// Set the BackExitStatus |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxNavigationalState::SetBackExitStatus(TBool aStatus) |
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{ |
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iBackExitStatus = aStatus; |
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} |
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|
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// ----------------------------------------------------------------------------- |
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// Get the BackExitStatus |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C TBool CGlxNavigationalState::BackExitStatus() |
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{ |
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return iBackExitStatus; |
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} |
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// ----------------------------------------------------------------------------- |
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// Set the Starting navigation Level |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxNavigationalState::SetStartingLevel(TInt aLevel) |
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{ |
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iStartingLevel = aLevel; |
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} |
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// ----------------------------------------------------------------------------- |
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// Get the Starting navigation Level |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C TInt CGlxNavigationalState::StartingLevel() |
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{ |
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return iStartingLevel; |
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} |
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// EOF |
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