/*

* Copyright (c) 2009 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:

*

*/

#include <HbInstance>

#include "hsdomainmodeldatastructures.h"

#include "hspage.h"

#include "hspagetoucharea.h"

#include "hspagenewwidgetlayout.h"

#include "hsscene.h"

#include "hsdatabase.h"

#include "hswidgethost.h"

#include "hswallpaper.h"

#include "hswidgetpositioningonwidgetadd.h"

#include "hswidgetpositioningonorientationchange.h"

#include "hsconfiguration.h"

/*!

    \class HsPage

    \ingroup group_hsdomainmodel

    \brief Represents a page in the framework.

    HsPage contains group of widgets. HsPage can have a wallpaper.

*/

/*!

    Constructor.

    \a parent Owner.

    \a aFlags Window flags.

*/

HsPage::HsPage(QGraphicsItem* parent)

    : HbWidget(parent),

      mDatabaseId(-1),

      mWallpaper(0),

      mRemovable(true),

{

    setFlag(QGraphicsItem::ItemHasNoContents);

    setSizePolicy(QSizePolicy(QSizePolicy::Ignored,

                              QSizePolicy::Ignored));

    setupTouchArea();

}

/*!

    Destructor.

*/

HsPage::~HsPage()

{

    delete mWallpaper;

}

/*!

    Returns the database id.

*/

int HsPage::databaseId() const

{

    return mDatabaseId;

}

/*!

    Sets the database id to \a id.

*/

void HsPage::setDatabaseId(int id)

{

    mDatabaseId = id;

}

void HsPage::setGeometry(const QRectF &rect)

{

    if (mTouchArea) {

        mTouchArea->resize(rect.size());

    }

    HbWidget::setGeometry(rect);

}

/*!

    Loads widgets.

*/

bool HsPage::load()

{

    if (mDatabaseId < 0) {

        return false;

    }

    HsDatabase *db = HsDatabase::instance();

    QList<HsWidgetData> datas;

    if (!db->widgets(mDatabaseId, datas)) {

        return false;

    }

    if (HSCONFIGURATION_GET(sceneType) == HsConfiguration::PageWallpapers) {

        mWallpaper = new HsPageWallpaper(this);

    }

    foreach (HsWidgetData data, datas) {

        HsWidgetHost *widget = new HsWidgetHost(data.id);

        mWidgets.append(widget);

        connectWidget(widget);

        widget->setPage(this);

        widget->setParentItem(this);

        widget->startWidget(isDefaultPage());

    }

    connect(HsScene::mainWindow(),

        SIGNAL(orientationChanged(Qt::Orientation)),

        SLOT(onOrientationChanged(Qt::Orientation)));

    return true;

}

/*!

*/

HsWallpaper *HsPage::wallpaper() const

{

    return mWallpaper;

}

/*!

    Add given existing \a widgetHost to a page. Returns true if successful

*/

bool HsPage::addExistingWidget(HsWidgetHost *widgetHost)

{

    if (!widgetHost) {

        return false;

    }

    if (mWidgets.contains(widgetHost)) {

        return true;

    }

    if (!widgetHost->setPage(this)) {

        return false;

    }

    connectWidget(widgetHost);

    mWidgets << widgetHost;

    widgetHost->setParentItem(this);

    return true;

 }

/*!

    Remove given \a widgetHost from a page. Widget is not deleted. 

    Returns true if successful

*/

bool HsPage::removeWidget(HsWidgetHost *widgetHost)

{

    if (!widgetHost || !widgetHost->setPage(0)) {

        return false;

    }

    disconnectWidget(widgetHost);

    mWidgets.removeOne(widgetHost);

    widgetHost->setParentItem(0);

    return true;

}

/*!

    Returns list of new widgets belonging to a page. Widgets which are

    not yet layouted are considered as new widgets. 

*/

QList<HsWidgetHost *> HsPage::newWidgets()

{

    return mNewWidgets;

}

/*!

    Adds new widget into a page. Returns true if successfull.

*/

bool HsPage::addNewWidget(HsWidgetHost* widgetHost, const QPointF &touchPoint)

{

    mTouchPoint = touchPoint;

    if (!widgetHost || mWidgets.contains(widgetHost)) {

        return false;

    }

    if (mNewWidgets.contains(widgetHost)) {

        return true;

    }

    HsWidgetPresentationData presentation;

    presentation.orientation = HsScene::orientation();

    if (!widgetHost->getPresentation(presentation)) {

        presentation.orientation = HsScene::orientation();

        presentation.zValue = 0;

        widgetHost->savePresentation(presentation);

    }

    widgetHost->hide();

    widgetHost->setZValue(presentation.zValue);

    connectWidget(widgetHost);

    mNewWidgets << widgetHost;

    return true;

}

/*!

    Layouts all the new widgets

*/

void HsPage::layoutNewWidgets()

{

    if (mNewWidgets.isEmpty()) {

        return;

    }

    HsPageNewWidgetLayout *newWidgetLayout = static_cast<HsPageNewWidgetLayout *>(layout());

    if (!newWidgetLayout) {

        newWidgetLayout = new HsPageNewWidgetLayout(mTouchPoint);

        setLayout(newWidgetLayout);

    }    

    updateZValues();

    HsWidgetHost *widget = 0;

    for (int i = 0; i < mNewWidgets.count(); ++i) {

        widget = mNewWidgets.at(i);

        newWidgetLayout->addItem(widget);

        widget->setPage(this);

        widget->setParentItem(this);

        widget->showWidget();

        widget->show();

    }

    mWidgets << mNewWidgets;

    mNewWidgets.clear();

}

/*!

    Remove page and all it's contained widgets from database 

*/

bool HsPage::deleteFromDatabase()

{

    foreach (HsWidgetHost *widget, mWidgets) {

        widget->remove();

    }

    mWidgets.clear();

    foreach (HsWidgetHost *widget, mNewWidgets) {

        widget->remove();

    }

    mNewWidgets.clear();

    foreach (HsWidgetHost *widget, mUnavailableWidgets) {

        widget->remove();

    }

    mUnavailableWidgets.clear();

    return HsDatabase::instance()->deletePage(mDatabaseId);

}

/*!

    Return list of widgets belonging to a page 

*/

QList<HsWidgetHost *> HsPage::widgets() const

{

    return mWidgets;

}

/*!

    Returns true if the page can be removed. Otherwise,

    returns false.

*/

bool HsPage::isRemovable() const

{

    return mRemovable;

}

/*!

    Sets removable flag to \a removable.

*/

void HsPage::setRemovable(bool removable)

{

    mRemovable = removable;

}

/*!

    Return true if page is default page.

*/

bool HsPage::isDefaultPage() const

{

    return mDatabaseId == HSCONFIGURATION_GET(defaultPageId);

}

/*!

    Return true if page is active page.

*/

bool HsPage::isActivePage() const

{

    return this == HsScene::instance()->activePage();

}

/*!

    Create page into database and return instance of a new page.

*/

HsPage *HsPage::createInstance(const HsPageData &pageData)

{

    HsDatabase *db = HsDatabase::instance();

    Q_ASSERT(db);

    HsPageData data(pageData);

    if (db->insertPage(data)) {

        HsPage *page = new HsPage;

        page->setDatabaseId(data.id);

        return page;

    }

    return 0;

}

/*!

    Calls onShow() for contained widgets.

*/

void HsPage::showWidgets()

{

    foreach (HsWidgetHost *widget, mWidgets) {

        if (widget->parentItem() == this) {

            widget->showWidget();

        }

    }

}

/*!

    Calls onHide() for contained widgets.

*/

void HsPage::hideWidgets()

{

    foreach (HsWidgetHost *widget, mWidgets) {

        if (widget->parentItem() == this) {

            widget->hideWidget();

        }

    }

}

/*!

*/

void HsPage::setOnline(bool online)

{

    foreach (HsWidgetHost *widget, mNewWidgets) {

        widget->setOnline(online);

    }

    foreach (HsWidgetHost *widget, mWidgets) {

        widget->setOnline(online);

    }

}

/*!

    Update widgets z-values and persist those. Active widget has top most 

    z-value.

*/

void HsPage::updateZValues()

{

    int z = 0;

    if (!mWidgets.isEmpty()) {

        QMultiMap<qreal, HsWidgetHost *> map;

        foreach (HsWidgetHost *widget, mWidgets) {

            map.insert(widget->zValue(), widget);

        }

        QList<HsWidgetHost *> sortedWidgets = map.values();

        HsWidgetHost *activeWidget = HsScene::instance()->activeWidget();

        if (sortedWidgets.contains(activeWidget)) {

            sortedWidgets.removeOne(activeWidget);

            sortedWidgets.append(activeWidget);

        }

        foreach (HsWidgetHost *widget, sortedWidgets) {

            widget->setZValue(z++);

            widget->savePresentation();

        }

    }

    if (!mNewWidgets.isEmpty()) {

        foreach (HsWidgetHost *widget, mNewWidgets) {

            widget->setZValue(z++);

            widget->savePresentation();

        }

    }

}

/*!

    Return this page's index.

*/

int HsPage::pageIndex()

{

    return HsScene::instance()->pages().indexOf(this);

}

/*!

    Create touch area for page.

*/

void HsPage::setupTouchArea()

{

    mTouchArea = new HsPageTouchArea(this);

    mTouchArea->setZValue(-1);

}

/*!

    Utility to connect widget signals to page.

*/

void HsPage::connectWidget(HsWidgetHost *widget)

{