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/*
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* Copyright (c) 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:
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*
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*/
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#include "cntviewnavigator.h"
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#include <cntviewparams.h>
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#include <QDebug>
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CntViewNavigator::CntViewNavigator( QObject* aParent ) :
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QObject(aParent),
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mTop(noView),
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mPreviousViewId(noView)
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{
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}
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CntViewNavigator::~CntViewNavigator()
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{
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}
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void CntViewNavigator::next( const int& aId, QFlags<Hb::ViewSwitchFlag> &flags )
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{
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if ( !mViewStack.isEmpty() )
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{
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int top = mViewStack.top();
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// If any special effects are defined for the current (top) view and associated with the next view
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if ( mEffects.contains( top ) && mEffects.value( top ) == aId )
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{
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flags = Hb::ViewSwitchUseNormalAnim | Hb::ViewSwitchUseAltEvent;
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}
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else
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{
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flags = Hb::ViewSwitchUseNormalAnim;
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}
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}
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mViewStack.push( aId );
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}
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const int& CntViewNavigator::back( QFlags<Hb::ViewSwitchFlag> &flags, bool toRoot )
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{
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mTop = noView;
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// Check if exception is set for current view item. Exception
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// means that instead of one step back, we go back until that
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// execption value is located. So all items that are jumped over,
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// their history will be eared.
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if ( !mViewStack.isEmpty() )
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{
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int top = mViewStack.top();
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// If we need to go to the latest root view
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if ( toRoot )
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{
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while ( !mViewStack.isEmpty() )
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{
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int current = mViewStack.top();
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if ( mRoots.contains( current ) )
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{
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mTop = current;
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break;
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}
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mPreviousViewId = mViewStack.pop();
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}
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}
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// If any exception defined for the current (top) view
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else if ( mExceptions.contains( top ) )
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{
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mTop = mExceptions.value( top );
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// cleanup the history until the exception value is found
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while ( !mViewStack.isEmpty() )
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{
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if ( mTop == mViewStack.top() )
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{
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break; // don't pop the exception it self.
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}
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mPreviousViewId = mViewStack.pop();
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}
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}
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// No exceptions defined, go one step back
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else
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{
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mPreviousViewId = mViewStack.pop();
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if ( !mViewStack.isEmpty() )
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{
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mTop = mViewStack.top();
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}
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}
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// If any special effects are defined for the current (top) view and associated with the previous view
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if ( mEffects.contains( top ) && mEffects.value( top ) == mTop )
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{
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flags = Hb::ViewSwitchUseBackAnim | Hb::ViewSwitchUseAltEvent;
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}
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else
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{
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flags = Hb::ViewSwitchUseBackAnim;
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}
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}
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return mTop;
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}
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void CntViewNavigator::addException( const int& aCurrent, const int& aBack )
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{
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mExceptions.insert( aCurrent, aBack );
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}
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void CntViewNavigator::removeException( const int& aCurrent )
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{
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if ( mExceptions.contains(aCurrent) )
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{
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mExceptions.remove( aCurrent );
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}
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}
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void CntViewNavigator::addEffect( const int& aCurrent, const int& aBack )
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{
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mEffects.insert( aCurrent, aBack );
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}
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void CntViewNavigator::removeEffect( const int& aCurrent )
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{
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if ( mEffects.contains(aCurrent) )
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{
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mEffects.remove( aCurrent );
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}
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}
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void CntViewNavigator::addRoot( const int& aCurrent )
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{
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mRoots.append( aCurrent );
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}
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int CntViewNavigator::internalize(QDataStream &stream)
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{
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int viewId = noView;
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//read the view id and a view stack from stream.
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stream >> viewId >> mViewStack;
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return viewId;
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}
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void CntViewNavigator::externalize(QDataStream &stream)
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{
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int viewId = noView;
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//remove top view id of stack.
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if (!mViewStack.isEmpty()) {
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viewId = mViewStack.pop();
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}
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if (viewId == noView) {
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viewId = mPreviousViewId;
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}
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//stream the view id and a view stack
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stream << viewId << mViewStack;
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}
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void CntViewNavigator::clearViewStack()
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{
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mViewStack.clear();
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}
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// End of File
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