homescreenapp/stateplugins/hsapplibrarystateplugin/src/hsmenuview.cpp
author hgs
Fri, 06 Aug 2010 13:36:36 +0300
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permissions -rw-r--r--
201031
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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: Menu view.
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 *
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 */
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#include <QActionGroup>
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#include <HbAction>
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#include <HbAbstractItemView>
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#include <HbAbstractViewItem>
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#include <HbGroupBox>
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#include <HbListView>
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#include <HbMainWindow>
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#include <HbInstance>
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#include <HbSearchPanel>
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#include <HbPushButton>
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#include <HbToolBar>
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#include <HbView>
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#include <HbToolBarExtension>
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#include <HbShrinkingVkbHost>
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#include "hsallappsstate.h"
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#include "hsallcollectionsstate.h"
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#include "hscollectionstate.h"
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#include "hsmainwindow.h"
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#include "hsmenuitemmodel.h"
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#include "hsmenuview.h"
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#include "hslistviewitem.h"
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#include "hssearchview.h"
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/*!
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    \class HsMenuView
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    \ingroup group_hsmenustateplugin
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    \brief Menu View.
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    Provides UI for Application Library states.
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    \sa HsAppLibraryState
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*/
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/*!
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 Retrieves UI objects for a requested context and sets up signals' connections.
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 \param builder Menu View builder.
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 \param stateContext Variable representing view context the view is to be prepared for.
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 \param mainWindow Object responsible for making a given view
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    a currently displayed view.
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 */
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HsMenuView::HsMenuView(HsMenuViewBuilder &builder,
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                       HsStateContext stateContext,
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                       HsMainWindow &mainWindow):
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    mBuilder(builder),
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    mStateContext(stateContext),
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    mOperationalContext(HsItemViewContext),
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    mMainWindow(mainWindow),
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    mHsSearchView(new HsSearchView(mBuilder, mStateContext, mMainWindow))
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{
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    synchronizeCache();
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    connect(mListView,
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            SIGNAL(activated(QModelIndex)),
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            this, SIGNAL(activated(QModelIndex)));
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    connect(mListView,
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            SIGNAL(longPressed(HbAbstractViewItem *, QPointF)),
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            this, SIGNAL(longPressed(HbAbstractViewItem *, QPointF)));
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    connect(mHsSearchView.data(), SIGNAL(activated(QModelIndex)),
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            this, SIGNAL(activated(QModelIndex)));
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    connect(mHsSearchView.data(),
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            SIGNAL(longPressed(HbAbstractViewItem *, QPointF)),
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                        this, SIGNAL(longPressed(HbAbstractViewItem *, QPointF)));
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}
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/*!
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    Empty.
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 */
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HsMenuView::~HsMenuView()
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{
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}
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/*!
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 Sets model for list item view if available in current context otherwise
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 ingores the request.
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 \param model Model the view is to represent in HsItemViewMode.
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 */
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void HsMenuView::setModel(QAbstractItemModel *model)
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{
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    HSMENUTEST_FUNC_ENTRY("HsMenuView::setModel");
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    if (mListView != NULL) {
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        if (mListView->model()) {
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            disconnect(mListView->model(),
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                       SIGNAL(scrollTo(int, QAbstractItemView::ScrollHint)),
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                       this,
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                       SLOT(scrollToRow(int, QAbstractItemView::ScrollHint)));
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            disconnect(mListView->model(), SIGNAL(countChange()),
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                       this,
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                        SIGNAL(listViewChange()));
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        }
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        mListView->setItemPixmapCacheEnabled(true); // TODO: remove when enabled from default
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        mListView->setModel(model, new HsListViewItem());
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        if (mListView->model()) {
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            connect(mListView->model(),
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                    SIGNAL(scrollTo(int, QAbstractItemView::ScrollHint)),
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                    this,
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                    SLOT(scrollToRow(int, QAbstractItemView::ScrollHint)));
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            connect(mListView->model(), SIGNAL(countChange()),
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                    this,
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                    SIGNAL(listViewChange()));
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        }
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    }
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    HSMENUTEST_FUNC_EXIT("HsMenuView::setModel");
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}
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/*!
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 Returns model for list item view.
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 */
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QAbstractItemModel *HsMenuView::model() const
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{
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    return mListView->model();
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}
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/*!
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\return View widget of the menu view.
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 */
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HbView *HsMenuView::view() const
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{
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    return mView;
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}
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/*!
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\return List view widget of the menu view
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 if available in the context or NULL otherwise.
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 */
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HbListView *HsMenuView::listView() const
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{
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    return mListView;
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}
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/*!
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    Returns label appropriate for the view.
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    \return Pointer to the label
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    if available in the context or NULL otherwise.
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 */
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HbGroupBox *HsMenuView::viewLabel() const
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{
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    return mViewLabel;
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}
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/*!
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\return Collection button
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 if available in the context or NULL otherwise.
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 */
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HbPushButton *HsMenuView::contentButton() const
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{
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    return mAddContentButton;
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}
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/*!
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 Makes search panel visible.
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 Equivalent to \a setSearchPanelVisible(true)
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 */
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void HsMenuView::showSearchPanel()
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{
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    HSMENUTEST_FUNC_ENTRY("HsMenuView::showSearchPanel");
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    mHsSearchView->setSearchPanelVisible(true);
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    HSMENUTEST_FUNC_EXIT("HsMenuView::showSearchPanel");
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}
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/*!
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 Makes search panel invisible.
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 Equivalent to \a setSearchPanelVisible(false).
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 */
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void HsMenuView::hideSearchPanel()
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{
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    HSMENUTEST_FUNC_ENTRY("HsMenuView::hideSearchPanel");
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    mHsSearchView->setSearchPanelVisible(false);
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    HSMENUTEST_FUNC_EXIT("HsMenuView::hideSearchPanel");
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}
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/*!
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 Disable or enable search action button.
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 \param disable If true action gets disabled.
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 */
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void HsMenuView::disableSearch(bool disable)
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{
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    mBuilder.searchAction()->setDisabled(disable);
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}
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/*!
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 Scrolls list item view to requested row.
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 \param row The row which is to get at the position pointed by \a hint.
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 \param hint Position in the view the row should be scrolled to.
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  */
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void HsMenuView::scrollToRow(int row, QAbstractItemView::ScrollHint hint)
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{
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    HSMENUTEST_FUNC_ENTRY("HsMenuView::scrollToRow");
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    if (mListView != NULL) {
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        mListView->scrollTo(
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            mListView->model()->index(row, 0), convertScrollHint(hint));
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    }
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    HSMENUTEST_FUNC_EXIT("HsMenuView::scrollToRow");
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}
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/*!
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     Converts scroll hints.
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     \param Qt hint Where the target item should be positioned in
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     visible area after scroll.
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     \return Orbit version of hint
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 */
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HbAbstractItemView::ScrollHint HsMenuView::convertScrollHint(
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    QAbstractItemView::ScrollHint hint)
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{
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    switch (hint) {
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    case QAbstractItemView::EnsureVisible:
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        return HbAbstractItemView::EnsureVisible;
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    case QAbstractItemView::PositionAtTop:
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        return HbAbstractItemView::PositionAtTop;
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    case QAbstractItemView::PositionAtBottom:
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        return HbAbstractItemView::PositionAtBottom;
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    default:
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        return HbAbstractItemView::PositionAtCenter;
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    }
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}
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/*!
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 Add the view to main window and connect search action with \a showSearchPanel
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 slot of the window.
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 */
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void HsMenuView::activate()
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{
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    mMainWindow.setCurrentView(mView);
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    connect(mBuilder.searchAction(), SIGNAL(triggered()),
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            this, SLOT(showSearchPanel()), Qt::UniqueConnection);
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}
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/*!
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 Disconnects search action and disconnects \a showSearchPanel slot from the window.
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 */
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void HsMenuView::inactivate()
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{
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    // handle app key event
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    mBuilder.toolBarExtension()->close();
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    disconnect(mBuilder.searchAction(), SIGNAL(triggered()),
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               this, SLOT(showSearchPanel()));
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}
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/*!
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  Makes a new view to be activated. Ensure navigation action and view label
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  heading are preserved after reset.
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  \param operationalContext Context indicating which view to activate.
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 */
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void HsMenuView::reset(HsOperationalContext operationalContext)
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{
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    QString viewLabelHeading;
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    // before changing context read current view label heading ...
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    synchronizeCache();
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    if (mBuilder.currentViewLabel() != 0) {
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        viewLabelHeading = mBuilder.currentViewLabel()->heading();
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    }
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    // ... and back-key action
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    HbAction *const backKeyAction(mView->navigationAction());
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    // now we can switch the context
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    mOperationalContext = operationalContext;
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    synchronizeCache();
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    if (mBuilder.currentViewLabel() != 0) {
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        mBuilder.currentViewLabel()->setHeading(viewLabelHeading);
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    }
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    mView->setNavigationAction(backKeyAction);
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}
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/*!
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 Builder can be shared between many instances of HsMenuView
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 being in different contexts. Before using builder make sure
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 it is in context matching the current HsMenuView.
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 */
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void HsMenuView::switchBuilderContext()
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{
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    mBuilder.setStateContext(mStateContext);
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    mBuilder.setOperationalContext(mOperationalContext);
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}
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/*!
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 Updates internal data references to widgets.
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 */
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void HsMenuView::synchronizeCache()
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{
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    switchBuilderContext();
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    mView = mBuilder.currentView();
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    mListView = mBuilder.currentListView();
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    mViewLabel = mBuilder.currentViewLabel();
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    mAddContentButton = mBuilder.currentAddContentButton();
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}