/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbWidgets module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include "hbdataform_p.h"

#include <hbdataformviewitem.h>

#include "hbdataformviewitem_p.h"

#include "hbdataitemcontainer_p.h"

#include "hbdatagroup_p_p.h"

#include <hbcombobox.h>

#include <hbapplication.h>

#include <hbdataformmodel.h>

#include "hbdataformheadingwidget_p.h"

#include "hbtreemodeliterator_p.h"

#include <hbdatagroup_p.h>

#include <QStringListModel>

#include <QHash>

HbDataFormPrivate::HbDataFormPrivate() :

    HbAbstractItemViewPrivate(),

    mHeadingWidget(0)

{

}

HbDataFormPrivate::~HbDataFormPrivate()

{

}

int HbDataFormPrivate::childCount(const QModelIndex &index) const

{

    Q_Q(const HbDataForm);

    int itemCount = 0;

    int rowCount = 0;

    if(!index.isValid()) {

        return 0;

    }

    if (q->isExpanded(index)) {

        rowCount = index.model()->rowCount(index);

    }

    itemCount += rowCount;

    for (int row = 0; row < rowCount; ++row) {

        itemCount += childCount(index.child(row, 0));

    }

    return itemCount;

}

void HbDataFormPrivate::init()

{

    Q_Q(HbDataForm);

    QList<HbAbstractViewItem*> protos;

    protos.append(new HbDataFormViewItem());

    protos.append(new HbDataGroup());

    q->setItemPrototypes(protos);

    q->setClampingStyle(HbScrollArea::BounceBackClamping);

    q->setItemRecycling(false);

    treeModelIterator()->setItemContainer(mContainer);

}

void  HbDataFormPrivate::_q_page_changed(int index)

{

    Q_Q(const HbDataForm);

    QModelIndex childIndex = pageModelIndex(index);

    //QModelIndex childIndex = q->model()->index(index,0);

    HbDataFormModelItem::DataItemType itemType =

        static_cast<HbDataFormModelItem::DataItemType>(

        (childIndex.data(HbDataFormModelItem::ItemTypeRole)).toInt());

    if(mHeadingWidget->mPageCombo) {

        if(mHeadingWidget->mPageCombo->currentIndex() != index) {

            QObject::disconnect(mHeadingWidget->mPageCombo,SIGNAL(currentIndexChanged(int)),

                q,SLOT(_q_page_changed(int)));

            mHeadingWidget->mPageCombo->setCurrentIndex(index);

            QObject::connect(mHeadingWidget->mPageCombo,SIGNAL(currentIndexChanged(int)),

                q,SLOT(_q_page_changed(int)));

        }

    }

   /* QStringListModel *model = static_cast<QStringListModel*>(

        mHeadingWidget->mPageCombo->model());

    QModelIndex changedIndex = model->index(index, 0);*/

    if(itemType == HbDataFormModelItem::FormPageItem) {

        if(index != mHeadingWidget->mActivePage) {

            QModelIndex prevPageIndex = pageModelIndex( mHeadingWidget->mActivePage );

            QModelIndex newPageIndex = pageModelIndex( index );

            if(prevPageIndex.isValid()) {

                HbDataGroup *prevPage = static_cast<HbDataGroup *>(

                                               q->itemByIndex(prevPageIndex));

                if(prevPage) {

                    HbDataGroupPrivate::d_ptr(prevPage)->setExpanded(false);

                } else {

                    mContainer->setItemTransientStateValue(prevPageIndex, "expanded", false);

                }

            }

            if(newPageIndex.isValid()) {

                HbDataGroup *newPage = static_cast<HbDataGroup *>(

                                               q->itemByIndex(newPageIndex));

                if(newPage) {

                    HbDataGroupPrivate::d_ptr(newPage)->setExpanded(true);

                } else {

                    mContainer->setItemTransientStateValue(newPageIndex, "expanded", true);

                }

            }

            mHeadingWidget->mActivePage = index;

        }

    }

}

/*

    Function to return valid modelIndex for corresponding formpage combo index.

*/

QModelIndex HbDataFormPrivate::pageModelIndex(int index) const 

{

    const Q_Q(HbDataForm);

    int pageIndex = -1;

    QModelIndex modelIndex;

    // Make sure that the child is groupPage type and current item is group.

    if( index >= 0) {

        HbDataFormModelItem *groupModelItem = static_cast<HbDataFormModel*>(q->model())->invisibleRootItem();

        int childCount = groupModelItem->childCount();

        for( int i = 0; i < childCount; i++) {

            HbDataFormModelItem *child = groupModelItem->childAt(i);

            if( child->type() == HbDataFormModelItem::FormPageItem ) {

                pageIndex ++;

                // get the index of groupPage

                if(pageIndex == index) {

                    modelIndex = static_cast<HbDataFormModel*>(q->model())->indexFromItem(child);

                    break;                  

                }

            }        

        }

    }

    return modelIndex;

}

/*!

    Creates a DataForm Page \a page in DataForm .

    DataForm Page is an invisible DataItem which can be changed/selected using combo box.

    \sa addFormPage

*/

void HbDataFormPrivate::addFormPage(const QString& page)

{

    Q_Q(HbDataForm);

    // Create combobox if not created 

    if(!mHeadingWidget) {

        mHeadingWidget = new HbDataFormHeadingWidget();

        static_cast<HbDataItemContainer*>(mContainer)->setFormHeading(mHeadingWidget);        

        QEvent polishEvent(QEvent::Polish);

        QCoreApplication::sendEvent(mHeadingWidget, &polishEvent);

    }

    if(!mHeadingWidget->mPageCombo) {

        mHeadingWidget->createPrimitives();

        mHeadingWidget->mPageCombo = new HbComboBox(mHeadingWidget);

        HbStyle::setItemName(mHeadingWidget->mPageCombo,"dataForm_Combo");

        QEvent polishEvent(QEvent::Polish);

        QCoreApplication::sendEvent(mHeadingWidget->mPageCombo, &polishEvent);

        // setFormHeading to the layout

        if(mHeadingWidget->mPageCombo || !mHeadingWidget->mDescription.isEmpty() || 

            !mHeadingWidget->mHeading.isEmpty()) {

            static_cast<HbDataItemContainer*>(mContainer)->setFormHeading(mHeadingWidget);

        }

        QObject::connect(mHeadingWidget->mPageCombo,SIGNAL(currentIndexChanged(int)),

            q,SLOT(_q_page_changed(int)));

    }

    // Get the model and add the page string to the model of combobox

    QStringListModel *model = static_cast<QStringListModel*>(mHeadingWidget->mPageCombo->model());

    if(!model) {

        QStringList list;

        model = new QStringListModel(list);

    }

    QStringList list = model->stringList();

    if(!list.contains(page)){

        list.append(page);

        model->setStringList(list);

        mHeadingWidget->mPageCombo->setModel(model);

        //mHeadingWidget->mPageCombo->setCurrentIndex(model->index(0,0));

        mHeadingWidget->mPageCombo->setCurrentIndex(0);

        _q_page_changed((mHeadingWidget->mPageCombo)->currentIndex());

    }

    mHeadingWidget->updatePrimitives();

}

void HbDataFormPrivate::removeFormPage(const QString& page) 

{

    Q_Q(HbDataForm);    

    if(mHeadingWidget && mHeadingWidget->mPageCombo) {

        // if we are emoving the current page

        if(mHeadingWidget->mPageCombo->currentText() == page){

        // if we are removing the last page then set the current page as 0th

            if( mHeadingWidget->mPageCombo->findText(page) + 1 == mHeadingWidget->mPageCombo->count()) {

                mHeadingWidget->mPageCombo->setCurrentIndex(0);

            } else {// set next page as the curent page

                mHeadingWidget->mPageCombo->setCurrentIndex(mHeadingWidget->mPageCombo->findText(page) + 1);

            }

        }

    }

    QObject::disconnect(mHeadingWidget->mPageCombo,SIGNAL(currentIndexChanged(int)),

            q,SLOT(_q_page_changed(int)));

    mHeadingWidget->mPageCombo->removeItem(mHeadingWidget->mPageCombo->findText(page));

    mHeadingWidget->mActivePage = mHeadingWidget->mPageCombo->currentIndex();

    QObject::connect(mHeadingWidget->mPageCombo,SIGNAL(currentIndexChanged(int)),

            q,SLOT(_q_page_changed(int)));

   mHeadingWidget->callPolish();    

}

/*void HbDataFormPrivate::_q_item_displayed(const QModelIndex &index)

{

    Q_Q( HbDataForm);

    emit q->itemShown(index);

    emit q->activated(index);

    qWarning("activated signal will not be emitted when items are created ," 

        "instead itemShown SIGNAL should be used");

}*/

void HbDataFormPrivate::makeConnection(QModelIndex index, HbWidget* widget)

{

    Q_Q( HbDataForm);

    if(!index.isValid()){

        return;

    }

    if(q->model()) {

        HbDataFormModelItem *modelItem = static_cast<HbDataFormModel *>(q->model())->itemFromIndex(index);

        if(modelItem){

            QList<ItemSignal> signalList = mConnectionList.values(modelItem);

            if(signalList.count() > 0){

                if(widget){

                    foreach(const ItemSignal& signal, signalList) {

                        QObject *objct = signal.receiver;

                        QString signalName = signal.signal;

                        QString slot = signal.slot;

                        // Make connection

                        if(objct) { 

                            QObject::connect(widget, signalName.toAscii().data(), 

                                objct,slot.toAscii().data());

                        }

                    }

                }

            }

        }

    }

}

void HbDataFormPrivate::removeConnection(HbDataFormModelItem * modelItem, 

                                  QString signal, 

                                  QObject *receiver, 

                                  QString slot)

{

    Q_Q( HbDataForm);

    if(q->model()) {

        if(modelItem){

            QList<ItemSignal> signalList = mConnectionList.values(modelItem);

            mConnectionList.remove(modelItem);

            if(signalList.count() > 0){

            QModelIndex index = 

                static_cast<HbDataFormModel*>(q->model())->indexFromItem(modelItem);

                HbDataFormViewItem *viewItem = static_cast<HbDataFormViewItem*>(q->itemByIndex(index));

                if(viewItem){

                    HbWidget *contentWidget = HbDataFormViewItemPrivate::d_ptr(viewItem)->mContentWidget;

                    if(contentWidget){

                        //foreach(ItemSignal signalItem, signalList) {

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

                            ItemSignal signalItem = signalList.at(i);

                            if(receiver == signalItem.receiver &&

                            signal == signalItem.signal &&

                            slot == signalItem.slot){

                            // disconnect

                                QObject::disconnect(contentWidget, signal.toAscii().data(), 

                                    receiver,slot.toAscii().data());

                                signalList.removeAt(i);

                                for(int j = 0; j < signalList.count(); j++){

                                    mConnectionList.insertMulti(modelItem, signalList.at(j));

                                }

                                break;

                            }                            

                        }

                    }

                }

            }

        }

    }

}

void HbDataFormPrivate::connectNow(HbDataFormModelItem * modelItem, 

                                   QString signal, 

                                   QObject *receiver, 

                                   QString slot)

{

    Q_Q( HbDataForm);    

    if(q->model()) {

        QModelIndex index = static_cast<HbDataFormModel*>(q->model())->indexFromItem(modelItem);

        if(modelItem){

            HbDataFormViewItem *viewItem =static_cast<HbDataFormViewItem*>( q->itemByIndex(index) );

            if(viewItem){

                if(HbDataFormViewItemPrivate::d_ptr(viewItem)->mContentWidget) {

                    // Make connection

                        QObject::connect(HbDataFormViewItemPrivate::d_ptr(viewItem)->mContentWidget, signal.toAscii().data(), 

                            receiver,slot.toAscii().data());

                }

            }

        }

    }

}

void HbDataFormPrivate::removeAllConnection()

{

    Q_Q( HbDataForm);

    if(q->model()) {

        QList<HbDataFormModelItem*> keys = mConnectionList.uniqueKeys();

        foreach(HbDataFormModelItem* item ,keys) {

            QList<ItemSignal> signalList = mConnectionList.values(item);

            mConnectionList.remove(item);

            if(signalList.count() > 0){

                QModelIndex index = static_cast<HbDataFormModel*>(q->model())->indexFromItem(item);

                HbDataFormViewItem *viewItem = static_cast<HbDataFormViewItem*> (q->itemByIndex(index));

                if(viewItem){

                    HbWidget *contentWidget = HbDataFormViewItemPrivate::d_ptr(viewItem)->mContentWidget;

                    // disconnect signal and remove signal from list

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

                        ItemSignal signalItem = signalList.takeAt(i);

                            // Make connection

                        QObject::disconnect(contentWidget, signalItem.signal.toAscii().data(), 

                                signalItem.receiver,signalItem.slot.toAscii().data());

                    }

                }

            }

        }

    }

}

void HbDataFormPrivate::removeAllConnection(HbDataFormModelItem *modelItem)

{

    Q_Q( HbDataForm);

    if(q->model()) {

        if(modelItem){

            QList<ItemSignal> signalList = mConnectionList.values(modelItem);

            mConnectionList.remove(modelItem);

            if(signalList.count() > 0){

                QModelIndex index = static_cast<HbDataFormModel*>(q->model())->indexFromItem(modelItem);

                HbDataFormViewItem *viewItem =static_cast<HbDataFormViewItem*>( q->itemByIndex(index));

                if(viewItem){

                    HbWidget *contentWidget = HbDataFormViewItemPrivate::d_ptr(viewItem)->mContentWidget;

                    // disconnect signal and remove signal from list

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

                        ItemSignal signalItem = signalList.takeAt(i);

                            // Make connection

                        QObject::disconnect(contentWidget, signalItem.signal.toAscii().data(), 

                                signalItem.receiver,signalItem.slot.toAscii().data());

                    }

                }

            }

        }

    }

}

void HbDataFormPrivate::emitActivated(const QModelIndex &modelIndex)

{

    Q_Q( HbDataForm);

    emit q->activated(modelIndex);

}