homescreenapp/hsdomainmodel/src/hspagenewwidgetlayout.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 18 Aug 2010 09:40:07 +0300
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permissions -rw-r--r--
Revision: 201031 Kit: 201033
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/*
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* Copyright (c) 2010 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 "hsdomainmodeldatastructures.h"
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#include "hspagenewwidgetlayout.h"
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#include "hsscene.h"
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#include "hspage.h"
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#include "hsdatabase.h"
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#include "hswidgethost.h"
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#include "hswidgethostvisual.h"
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#include "hswallpaper.h"
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#include "hswidgetpositioningonwidgetadd.h"
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#include "hswidgetpositioningonorientationchange.h"
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#include "hsconfiguration.h"
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#include "hsgui.h"
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/*!
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    \class HsPageNewWidgetLayout
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    \ingroup group_hsdomainmodel
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    \brief Represents a page in the framework.
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    HsPage is a parent for a group of widgets. HsPage can have a wallpaper.
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*/
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/*!
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    Constructor.
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    \a parent Owner.
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*/
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HsPageNewWidgetLayout::HsPageNewWidgetLayout(const QPointF &touchPoint,
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                                             QGraphicsLayoutItem *parent)
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    : QGraphicsLayout(parent),    
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    mTouchPoint(touchPoint)
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{
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    mSize = HsGui::instance()->layoutRect().size();
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}
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/*!
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    Destructor.
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*/
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HsPageNewWidgetLayout::~HsPageNewWidgetLayout()
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{
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}
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/*!
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    Returns children count.
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*/
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int HsPageNewWidgetLayout::count() const
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{
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    return mNewWidgets.count();
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}
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/*!
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    Returns item index of \a i.
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*/
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QGraphicsLayoutItem *HsPageNewWidgetLayout::itemAt(int i) const
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{
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    return mNewWidgets.at(i)->visual();
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}
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/*!
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    Removes item \a index.
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*/
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void HsPageNewWidgetLayout::removeAt(int index)
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{
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    mNewWidgets.removeAt(index);
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}
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/*!
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    Size hint.
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*/
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QSizeF HsPageNewWidgetLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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     switch (which) {
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     case Qt::MinimumSize:
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     case Qt::PreferredSize:
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         return mSize;
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     case Qt::MaximumSize:
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         return mSize;
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     default:
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         break;
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     }
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     return constraint;
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}
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/*!
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    Recalculates children positions.
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*/
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void HsPageNewWidgetLayout::setGeometry(const QRectF &rect)
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{
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    QGraphicsLayout::setGeometry(rect);
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#ifdef HSWIDGETORGANIZER_ALGORITHM
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    // sort new widgets in order
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    if (mNewWidgets.count() > 1) {
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        // TODO: read from configuration? or just use height for portrait and width for landscape (currently only height is used)
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        sortOrder order(height);
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        mNewWidgets = sortWidgets(order);
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    }
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#endif
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    // get rects for new widgets
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    QList<QRectF> newRects;
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    foreach (HsWidgetHost *newWidget, mNewWidgets) {
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        newRects << QRectF(QPointF(), newWidget->visual()->preferredSize());
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    }
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    /* if there is touch point defined (widget added from context menu)
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       then there is only one widget in the list
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       -> set widget center point to this touch point
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    */
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    if (mTouchPoint != QPointF() && mNewWidgets.count() == 1) {
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        QRectF widgetRect = newRects.at(0);
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        widgetRect.moveCenter(mTouchPoint);
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        widgetRect.moveTopLeft(HsScene::instance()->activePage()->adjustedWidgetPosition(widgetRect));
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        mNewWidgets.at(0)->visual()->setGeometry(widgetRect);
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        /* we have to save widget presentation data here after drawing
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           to get correct position for later use
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        */
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        mNewWidgets.at(0)->savePresentation();
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    }
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    // otherwise calculate widget positions with algorithm
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    else {
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        // get page rect
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        QRectF pageRect = HsScene::instance()->activePage()->contentGeometry();
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        // scan existing widgets rects
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        QList<HsWidgetHost*> existingWidgets;
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        existingWidgets = HsScene::instance()->activePage()->widgets();
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        QList<QRectF> existingRects;
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        foreach (HsWidgetHost *widget, existingWidgets) {
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            if (!mNewWidgets.contains(widget)) {
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                existingRects << QRectF(widget->visual()->pos(), widget->visual()->preferredSize());
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            }
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        }
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        // calculate new widget positions with "stuck 'em all"-algorithm
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        HsWidgetPositioningOnWidgetAdd *algorithm =
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            HsWidgetPositioningOnWidgetAdd::instance();
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        QList<QRectF> calculatedRects =
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            algorithm->convert(pageRect, existingRects, newRects, QPointF());
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        for ( int i=0; i<mNewWidgets.count(); i++) {
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            mNewWidgets.at(i)->visual()->setGeometry(calculatedRects.at(i));
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            mNewWidgets.at(i)->savePresentation();
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        }
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    }
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}
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/*!
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    Adds item to layout.
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*/
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void HsPageNewWidgetLayout::addItem(HsWidgetHost *item)
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{
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    mNewWidgets.append(item);
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}
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#ifdef HSWIDGETORGANIZER_ALGORITHM
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// TODO: sorting should be done in algorithm class, make widget<->rect mapping here and move sortWidgets function to algorithm side
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/*!
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    Sorts widgets in height/width order
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*/
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QList<HsWidgetHost*> HsPageNewWidgetLayout::sortWidgets(sortOrder order)
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{
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    QList<HsWidgetHost*> tmpWidgets;
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    for ( int i = 0; i < mNewWidgets.count(); i++) {
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        int index = 0;
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        // add first widget to sorted list
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        if (i == 0) {
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            tmpWidgets << mNewWidgets.at(i);
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        } else {
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            // go through existing widgets in the sorted list
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            for ( int j = 0; j < tmpWidgets.count(); j++) {
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                // sort widgets in height order
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                if (order == height) {
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                    /* if widgets heigth is smaller on already
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                       existing ones in the list -> increment index
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                    */
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                    if (mNewWidgets.at(i)->visual()->preferredHeight() <= tmpWidgets.at(j)->visual()->preferredHeight()) {
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                        index++;
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                    }
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                // sort widgets in width order
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                } else {
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                    /* if widgets width is smaller on already
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                       existing ones in the sorted list -> increment index
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                    */
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                    if (mNewWidgets.at(i)->visual()->preferredWidth() <= tmpWidgets.at(j)->visual()->preferredWidth()) {
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                        index++;
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                    }
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                }
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            }
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            // add widget to its correct index in sorted list
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            tmpWidgets.insert(index, mNewWidgets.at(i));
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        }
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    }
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    return tmpWidgets;
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}
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#endif // HSWIDGETORGANIZER_ALGORITHM