/*

* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:   Videolist view class definition

*

*/

#ifndef VIDEOLISTVIEW_H

#define VIDEOLISTVIEW_H

#include <hbview.h>

#include <qnamespace.h>

#include <hbaction.h>

class QGraphicsItem;

class QVariant;

class HbToolBarExtension;

class TMPXItemId;

class VideoListWidget;

class VideoCollectionViewUtils;

class VideoCollectionWrapper;

class VideoCollectionUiLoader;

class VideoServices;

class VideoListToolbar;

class VideoListMenu;

/**

 * Class acts as an container for widgets that are used to display different

 * data: all videos, video collections or video services.

 *

 * Class is also responsible to mainatain correct widget active selected by the user's

 * tap from the toolbar and creating and maintaining main menu commonly used by all widgets.

 *

 */

class VideoListView : public HbView

{

    Q_OBJECT

public:

    /**

     * Contructor.

     * @param uiLoader VideoCollectionUiLoader instance for this view

     * @param parent parent of this view

     */

    VideoListView(VideoCollectionUiLoader *uiLoader, QGraphicsItem *parent = 0);

    /**

     * Destructor.

     *

     */

    ~VideoListView();

    /**

     * Creates and initializes view objects, toolbar and menu and connects signals

     *

     * @return 0 if ok, < 0 if intialisation fails

     */

    int initializeView();

    /**

     * Activates current widget to be shown, enables menu and connects

     * orientation change signals.

     *

     * @param itemId, Id of the widget which is to be activated

     * @return 0 activation ok, < 0 if activation fails

     */

    int activateView(TMPXItemId &itemId);

    /**

     * Deactivates current widget, disables menu and disconnects

     * orientation change signals.

     *

     */

    void deactivateView();

    /**

     * Back implementation.

     * Not used at the moment

     *

     */

    void back();

    /**

     * Returns pointer to currently active VideoListWidget. Null if no 

     * active widget yet.

     * 

     * @return Currently active VideoListWidget, or null if no widget active.

     */

    VideoListWidget* getCurrentList();

signals:

    /**

     * Command signal. Should be connected to the

     * plugin interface's command -signal in order to

     * get the emitted commands transported uotside plugin.

     *

     * @param int command id

     */

    void command(int);

    /**

     * Signaled to do delayed loading of components not loaded initially at start up phase

     *

     */

    void doDelayeds();

    /**

     * Signaled when view is ready.

     */

    void viewReady();

private slots:

    /**

     * slot is connected to model's modelReady -signal

     */

    void modelReadySlot();

    /**

     * slot is connected to model's albumListReady -signal

     */

    void albumListReadySlot();

    /**

     * slot is connected to plugin's doDelayeds -signal

     *

     */

    void doDelayedsSlot();

    /**

     * slot is connected to service's titleReady -signal

     */

	void titleReadySlot(const QString& title);

     /**

     * Slot is connected to model slots informing changes in item count

     * Method checks the current model state and updates accrodingly

     *

     */

	void layoutChangedSlot();

    /**

     * Slot is connected into toolbar's all videos tab's

     * triggered signal.

     *

     * Activates all videos widget by calling changeWidget.

     *

     */

    void openAllVideosViewSlot();  

    /**

     * Slot is connected into toolbar's video collection tab's

     * triggered signal.

     *

     * Activates video collection widget by calling changeWidget.

     *

     */

    void openCollectionViewSlot();

    /**

     * Slot is connected into hbInstance's primary window's

     * aboutToChangeOrientation -signal. This is called when

     * orientation is to be change.

     */

    void aboutToChangeOrientationSlot();

    /**

     * Slot is connected into hbInstance's primary window's

     * aboutToChangeOrientation -signal. This is called when

     * orientation is changed.

     *

     * @param orientation new orientation

     */

    void orientationChangedSlot( Qt::Orientation orientation );

    /**

     * Slot is connected into viewdollectionwrapper's asyncStatus -signal

     * If status is failed delete, refiltering is called to model before

     * error message is shown.

     *

     * @param statusCode code of error

     * @param additional additional data of status

     */

    void handleAsyncStatusSlot(int statusCode, QVariant &additional);

    /**

     * Slot is connected to videolistwidgets collectionOpened -signal

     *

     * @param openingCollection

     * @param collection contains the name of the collection opened

     */

    void collectionOpenedSlot(bool openingCollection,

        const QString& collection,

        const TMPXItemId &collectionId);

    /**

     * Slot which is called when an object has been loaded.

     */

    void objectReadySlot(QObject *object, const QString &name);

    /**

     * Slot which is called when actions in toolbar needs to be changed.

     */

    void toolbarActionsChanged(QList<QAction*> newActions);

    /**

     * Slot which is called when toolbar extension needs to be changed.

     */

    void toolbarExtensionChanged(HbToolBarExtension* newExtension);

private:

    /**

     * Convenience method that modelReadySlot and albumListReadySlot calls.

     */

    void modelReady();

    /**

     * Cleans all possibly created objects from this. In some cases there are no quarantees

     * that they were created correctly, and thus is better to start again from clean slate.

     */

    void cleanup();

    /**

    * Method creates 3 tabs for the view's toolbar: all videos, collections and Services.

    * Tabs' icons are loaded and theiur triggered signals are connected into corresponding slots.

    *

    * @return 0 creation ok, < 0 creation fails

    */

    int createToolbar();

    /**

     * Shows or hides the hint. Only shows the hint if model does not have any

     * items.

     * 

     * @param show Set this to false if you want to force hide the hint.

     */

    void showHint(bool show = true);

    /**

     * Updates the sublabel text.

     */

    void updateSubLabel();

    /**

     * Activates all videos or collections -list.

     * 

     * @return int 0 ok 

     */

    int activateMainView();

    /**

     * Activate to collection content view when servicing.

     * Only default collections are supported. If some other

     * id is provided, all videos  -list will be activated 

     * 

     * @param itemId. Id of collection to activate

     * @return int 

     */

    int activateCollectionContentView(const TMPXItemId &itemId);

private:

    /**

     * Reference to video collection view utils

     */

    VideoCollectionViewUtils &mUiUtils;

    /**

     * Reference to videocollectionwrapper

     */

    VideoCollectionWrapper &mWrapper;

    /**

     * Pointer to the XML UI (DocML) loader, not owned

     */

    VideoCollectionUiLoader* mUiLoader;

    /**

     * Toolbar handler.

     */

    VideoListToolbar* mToolbar;

    /**

     * Menu handler.

     */

    VideoListMenu* mMenu;

    /**

     * Boolean for knowing when the model is ready.

     */

    bool mModelReady;

    /**

     * Boolean for knowing when the view is ready.

     */

    bool mViewReady;

    /**

     * Pointer to videoservices instance

     * if exists, app has started as service

     */

    VideoServices* mVideoServices;

    /**

     * Currently used list

     */

    VideoListWidget* mCurrentList;

    /**

     * String containing the name of the currently open collection

     */

    QString mCollectionName;

};

#endif // VIDEOLISTVIEW_H