videocollection/videocollectionview/inc/videolistwidget.h
author hgs
Thu, 24 Jun 2010 09:49:13 +0300
changeset 41 229f037ce963
parent 40 13331705e488
child 44 518105d52e45
permissions -rw-r--r--
201025
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/*
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* Copyright (c) 2008 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:   Videolist content widget
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*
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*/
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#ifndef VIDEOLISTWIDGET_H
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#define VIDEOLISTWIDGET_H
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#include <hbview.h>
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#include <hblistview.h>
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#include <qmap.h>
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#include <qpointer.h>
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#include <mpxitemid.h>
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#include "videoservices.h"
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#include "videocollectioncommon.h"
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class VideoSortFilterProxyModel;
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class VideoServices;
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class VideoCollectionUiLoader;
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class HbAction;
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class HbMenu;
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class QTimer;
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class QItemSelection;
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class VideoServices;
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/**
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 * Widget for displaying all videos, either using list- or grid view.
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 * Widget contains 2 widgets to be used for different orientation in the stacked layout.
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 *
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 * Depending on the orientation and it's change, corresponding view is set active.
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 *
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 */
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class VideoListWidget : public HbListView
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{
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    Q_OBJECT
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    Q_DISABLE_COPY(VideoListWidget)
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public:
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    /**
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     * Contructor.
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     * @param uiloader
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     * @param parent parent of this widget
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     */
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    VideoListWidget(VideoCollectionUiLoader *uiLoader, HbView *parent = 0);
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    /**
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     * Destructor.
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     *
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     */
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    virtual ~VideoListWidget();
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    /**
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     * Method creates colleciton wrapper, grid and list views,
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     * layout and activates correct view based on the current orientation
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     * 
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     * @param model Model for this list view.
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     * @param isService, flag indicating app service status
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     * @param level presetted level for the widget
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     * @return int 0 initialization ok, < 0 if fails.
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     */
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    int initialize(VideoSortFilterProxyModel &model, 
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                   bool isService  = false,
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                   VideoCollectionCommon::TCollectionLevels level = VideoCollectionCommon::ELevelInvalid);
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    /**
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     * Method enables and displays current active view
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     *
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     * @return int 0 initialization ok, < 0 if fails.
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     */
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    int activate();
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    /**
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     * Method enables and displays current active view
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     *
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     * @return int 0 initialization ok, < 0 if fails.
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     */
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    int activate(VideoCollectionCommon::TCollectionLevels level);
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    /**
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     * Method disables and hides current active view
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     *
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     */
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    void deactivate();
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    /**
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     * returns current level provided by activate
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     * 
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     * @return TCollectionLevels
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     */
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    VideoCollectionCommon::TCollectionLevels getLevel();
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    /**
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     * returns widget's model
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     * 
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     * @return VideoSortFilterProxyModel*
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     */
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    VideoSortFilterProxyModel* getModel();
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public:
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    /**
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     * Called by the fw when some item is tapped. Method check that
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     * index is valid and calls open item for collectionwrapper to
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     * open media object throught collection.
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     * 
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     * @param midelIndex, item's index
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     */
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    void emitActivated (const QModelIndex &modelIndex);
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    /**
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     * Overwritten from Abstractitemview.
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     * Sets local selection mode variable value used locally in checks. 
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     * If provided value is mode provided by HbAbstractitemview sets 
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     * it as view selection mode othervise NoSelection is setted
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     * 
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     * @param mode 
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	 */
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    void setSelectionMode(int mode);
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signals:
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    /**
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     * Command signal.
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     *
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     * @param int command id
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     */
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    void command(int);
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    /**
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     * Signals collection view's state. Used to indicate
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     * view incase some collection item is opened
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     *
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     * @param true if opened, false if closed.
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     * @param optional name string
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     */
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    void collectionOpened(bool, const QString&, const TMPXItemId&);
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    /**
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     * signal is connected to service's itemSelected -slot
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     */
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    void fileUri(const QString&);
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public slots:
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    /**
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     * Signaled by HbInputDialog when it's closed. 
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     */
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    void renameDialogFinished(HbAction *action);
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    /**
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     * Signaled by HbMessageBox when it's closed.
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     */
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    void deleteItemDialogFinished(HbAction *action);
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    /**
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     * Signaled by HbMessageBox when it's closed.
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     */
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    void removeCollectionDialogFinished(HbAction *action);
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    /**
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     * called or signaled when delayed initialization is reauired for the widget
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     *
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     */
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    void doDelayedsSlot();
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protected slots:
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    /**
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     * Signaled by the fw when item is long pressed.
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     * Popup menu for the particular item is opened.
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     * Saves current selected item's index to mCurrentIndex
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     */
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    void longPressedSlot(HbAbstractViewItem *item, const QPointF &point);
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private slots:
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    /**
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     * Signaled for one item deletion.
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     *
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     */
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    void deleteItemSlot();
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    /**
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     * Signaled for item rename.
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     *
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     */
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    void renameSlot();
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    /**
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     * Signaled to add an item into a collection.
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     *
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     */
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    void addToCollectionSlot();
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    /**
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     * Signaled to remove a particular video from collection
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     */
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    void removeFromCollectionSlot();
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    /**
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     * Signaled to remove a user created collection.
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     *
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     */
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    void removeCollectionSlot();
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    /**
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     * Signaled when details will be selected from the videolist's
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     * context menu. Maps mCurrentIndex to model's source index and
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     * calls collection wrapper to open details
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     *
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     */
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    void openDetailsSlot();
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    /**
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     * Signaled when item's default functionality is initialized from context menu.
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     * Calls emitActivated for actually axecuting the functionality
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     */
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    void openItemSlot();
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    /**
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     * Signaled when item's play functionality is initialized from context menu.
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     * Calls doActivateItem for actually executing the functionality.
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     */
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    void playItemSlot();
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    /**
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     * Signaled when stepping back from collection in collection view
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     *
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     */
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    void back();
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    /**
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     * connected to navi -quit action triggered signal.
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     * Signals fileUri with empty path for servicing to be completed
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     */
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    void endVideoFecthingSlot();
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	/**
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	 * Signaled when view scrolling starts, pauses thumbnail creation.
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	 *
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	 */
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	void scrollingStartedSlot();	
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	/**
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	 * Signaled when view scrolling ends, initiates thumbnail fetching
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	 * at index of first visible item and enables creation of thumbnails.
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	 *
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	 */
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	void scrollingEndedSlot();
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	/**
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	 * Signaled when view scroll position changes, initiates timer to 
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	 * fetch thumbnails at index of first visible item.
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	 *
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	 * @param newPosition scroll position 
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	 *
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	 */
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	void scrollPositionChangedSlot(const QPointF &newPosition);
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	/**
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	 * Signaled when scroll position timer triggers. Starts fetching thumbnails
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	 * for visible items.
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	 * 
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	 */
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	void scrollPositionTimerSlot();
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    /**
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     * Fetches thumbnails for the visible items.
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     *
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     */
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    void fetchThumbnailsForVisibleItems();
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private:
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    enum TContextActionIds
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    {
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    	EActionDelete = 1,
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        EActionDetails,
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        EActionRemove,
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        EActionAddToCollection,
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        EActionRemoveCollection,
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        EActionRename,
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    	EActionPlay,
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    	EActionOpen,
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    	EActionAttach
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    };
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    /**
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     * Method creates popup menu for list items.
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     *
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     */
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    void createContextMenu();
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    /**
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     * Method sets correct popup menu for specific list items.
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     *
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     */
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    void setContextMenu();
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    /**
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     * Method sets correct popup menu for service.
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     */
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    void setServiceContextMenu();
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    /**
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     * Method connects signals needed by the widget
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     *
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     * @return int 0 if connect ok, < 0 if connect fails
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     */
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    int connectSignals();
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    /**
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     * Method disconnects signals needed by the widget
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     *
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     */
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    void disConnectSignals();
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    /**
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     * Set navigation action.
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     */
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    void setNavigationAction();
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    /**
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     * Does the actual emitActivated functionality. Called from either emitActivated or
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     * openItemSlot.
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     * 
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     * @param index Index of the item.
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     */
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    void doEmitActivated (const QModelIndex &index);
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    /**
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     * handles single item activation. Either from 
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     * user's single tap or from default action at context menu.
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     * 
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     * @param index of item
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     */
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    void doActivateItem(const QModelIndex &index);
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private:
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    /**
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     * Provided model
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     * Not own.
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     */
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    QPointer<VideoSortFilterProxyModel> mModel;
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    /**
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     * pointer to videoservices instance. If exists, 
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     * app has started as service.
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     */
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    VideoServices* mVideoServices;
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    /**
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     * map containing pointers to main menu actions
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     */
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    QMap<TContextActionIds, HbAction*> mContextMenuActions;
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    /**
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     * current level indicating content currently showing: 
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     * category or videos
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     */
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    VideoCollectionCommon::TCollectionLevels mCurrentLevel;
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	/**
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     * True if signals have been connected
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     */
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	bool                       mSignalsConnected;
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	/**
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     * Navigation softkey action.
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     */
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	HbAction 				   *mNavKeyAction;
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    /**
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     * Item sensitive context menu
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     */
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    HbMenu                      *mContextMenu;
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    /**
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     * loacal selection mode
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	 */
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    int                        mSelectionMode;
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    /**
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     * Timer used to report thumbnail fetches class index of 
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     * first visible item when view is scrolling. 
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     */
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    QTimer                      *mScrollPositionTimer;
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    /**
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     * ui loade object, not owned
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     */
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    VideoCollectionUiLoader     *mUiLoader;
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    /**
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     * Service being provided
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     */
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    VideoServices::TVideoService mService;
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};
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#endif // VIDEOLISTWIDGET_H