src/hbwidgets/itemviews/hbtumbleviewitem.cpp
author hgs
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/****************************************************************************
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**
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (developer.feedback@nokia.com)
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**
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** This file is part of the HbWidgets module of the UI Extensions for Mobile.
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**
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** GNU Lesser General Public License Usage
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** This file may be used under the terms of the GNU Lesser General Public
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** License version 2.1 as published by the Free Software Foundation and
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** appearing in the file LICENSE.LGPL included in the packaging of this file.
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** Please review the following information to ensure the GNU Lesser General
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** Public License version 2.1 requirements will be met:
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at developer.feedback@nokia.com.
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**
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****************************************************************************/
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#include "hbtumbleviewitem.h"
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#include "hbtapgesture.h"
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#include "hblistviewitem_p.h"
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#include "hbnamespace_p.h"
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#include <hbstyleoption_p.h>
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#include <QGestureEvent>
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#include <QCoreApplication>
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/*!
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    @proto
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    \class HbTumbleViewitem
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    \brief The HbTumbleViewItem class represents a single row in HbTumbleView.
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    HbTumbleViewItem class provides an item that is used by the HbTumbleView class to
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    visualize content within single model index. HbTumbleViewItem supports 
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    QStringList that is stored into Qt::DisplayRole role within the index. 
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    This class acts as a default item prototype inside HbTumbleView.
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*/
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/*!
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    Constructs a TumbleViewItem with \a parent.
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*/
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HbTumbleViewItem::HbTumbleViewItem(QGraphicsItem *parent) :
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    HbListViewItem(parent)
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{
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    HB_SDD(HbAbstractViewItem);
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    sd->mItemType = QString("tumbleviewitem");
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    setFocusPolicy(Qt::NoFocus);
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}
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/*!
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    Destructor
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*/
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HbTumbleViewItem::~HbTumbleViewItem()
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{
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}
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/*!
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    \reimp
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*/
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int HbTumbleViewItem::type() const
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{
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    return Type;
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}
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/*!
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    \reimp
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*/
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HbAbstractViewItem *HbTumbleViewItem::createItem()
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{
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    HbTumbleViewItem* item = new HbTumbleViewItem(*this);
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    item->setFocusPolicy(Qt::NoFocus);
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    connect(item,SIGNAL(released(QPointF)),item->itemView(),SLOT(_q_itemSelected(QPointF)));
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    return item;
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}
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/*!
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    \reimp
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*/
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void HbTumbleViewItem::updateChildItems()
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{
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    Q_D(HbListViewItem);
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    if (d->mIndex.data(Qt::DisplayRole).isNull())
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         return;
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    HbListViewItem::updateChildItems();
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    if(d->mSelectionItem){
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        d->mSelectionItem->hide();
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    }
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}
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void HbTumbleViewItem::gestureEvent(QGestureEvent *event)
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{
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    HbTapGesture *gesture = static_cast<HbTapGesture *>(event->gesture(Qt::TapGesture));
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    if (gesture) {
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        Q_D(HbAbstractViewItem);
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        if(itemView()->isScrolling()){
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            event->ignore();
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            event->ignore(Qt::TapGesture);
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            return;
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        }
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        if(gesture->state() == Qt::GestureCanceled){
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            d->setPressed(false, false);
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            event->accept();
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            scene()->setProperty(HbPrivate::OverridingGesture.latin1(),QVariant());
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            return;
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        }
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        d->tapTriggered(event);
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    } else {
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        HbWidget::gestureEvent(event);
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    }
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}
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QSizeF HbTumbleViewItem::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
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{
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    HB_SDD(const HbAbstractViewItem);
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    static qreal height=0;
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    QSizeF sh=HbListViewItem::sizeHint(which,constraint);
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    if(which == Qt::PreferredSize && sh.height()<=0) {
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        //TODO:remove this check once refresh issue in DTP is solved on removeRows/insertRows
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        if(height<=0) {
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            //Let's create a temporary item and take the height for the size hint
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            HbAbstractViewItem *tempitem = sd->mPrototype->createItem();
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            if(sd->mItemView) {
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                QAbstractItemModel *model = sd->mItemView->model();
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                if(model) {
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                    int rowCount=model->rowCount();
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                    QModelIndex ind=model->index(rowCount,0);
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                    if(ind.isValid()) {
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                        tempitem->setModelIndex(ind);
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                    }
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                }
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            }
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            //call polish            
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            QEvent polishEvent(QEvent::Polish);
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            QCoreApplication::sendEvent(const_cast<HbAbstractViewItem *>(tempitem), &polishEvent);
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            height=tempitem->effectiveSizeHint(which,constraint).height();
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            delete tempitem;
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        }
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        return QSizeF(sh.width(),height);
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    }
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    return sh;
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}
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0
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#include "moc_hbtumbleviewitem.cpp"
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