/*

* 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 <QStandardItemModel>

#include <QDebug>

#include <hbmainwindow.h>

#include <hbapplication.h>

#include <hbaction.h>

#include <hbtoolbar.h>

#include <hblabel.h>

#include <hbtreeview.h>

#include <hblistview.h>

#include <hbsearchpanel.h>

#include <hbscrollbar.h>

#include <hblineedit.h>

#include <hbmenu.h>

#include <hbstaticvkbhost.h>

#include <hbgroupbox.h>

#include "HelpDataProvider.h"

#include "HelpProxyModel.h"

#include "HelpCategoryView.h"

//////////////////////////////////////////////////////////////////////////////////////////////

HelpCategoryView::HelpCategoryView() : 

mViewMode(ViewModeNull), 

mListAll(NULL), 

mListSearch(NULL), 

mSearchPanel(NULL)

{

}

HelpCategoryView::~HelpCategoryView()

{

}

////////////////////////////////////////////////////////////////////////////////////////////

void HelpCategoryView::init()

{

	initDocMl();

    initBackAction();

    initAllList();

    initSearchList();

    initSearchPanel();

	initVirtualKeyboard();

	initEmptyLabel();

    switchViewMode(ViewModeAll);

    connect(mainWindow(), SIGNAL(currentViewChanged(HbView*)), this, SLOT(onCurrentViewChanged(HbView*)));

}

void HelpCategoryView::initDocMl()

{

 // Create widget hierarchy

    setObjectName( DOCML_VIEW_CATEGORY );

    // List existing root elements - this allows us to refer to objects in the XML 

    // which are created outside the document.

    QObjectList roots;

    roots.append( this );

	mBuilder.setObjectTree(roots);

    mBuilder.load(QRC_DOCML_CATEGORY);

}

void HelpCategoryView::initBackAction()

{

    mSoftKeyAction = new HbAction(Hb::BackAction);

    connect(mSoftKeyAction, SIGNAL(triggered()), this, SLOT(onBackAction()));

}

void HelpCategoryView::initAllList()

{

    mListAll = mBuilder.findWidget<HbTreeView*>(DOCML_LIST_CATEGORY_ALL);

    mListAll->setHorizontalScrollBarPolicy(HbScrollArea::ScrollBarAlwaysOff);

    mListAll->setModel(HelpDataProvider::instance()->getCategoryData());

    connect(mListAll, SIGNAL(activated(const QModelIndex&)), this, SLOT(onAllListActivated(const QModelIndex&)));

}

void HelpCategoryView::initSearchList()

{

    mListSearch = mBuilder.findWidget<HbListView*>(DOCML_LIST_CATEGORY_SEARCH);

    mListSearch->setHorizontalScrollBarPolicy(HbScrollArea::ScrollBarAlwaysOff);

    mListSearch->setModel(HelpDataProvider::instance()->getSearchData());

    connect(mListSearch, SIGNAL(activated(const QModelIndex&)), this, SLOT(onSearchListActivated(const QModelIndex&)));

}

void HelpCategoryView::initSearchPanel()

{

    mSearchPanel = mBuilder.findWidget<HbSearchPanel*>(DOCML_SEARCH_PANEL_CATEGORY);

    connect(mSearchPanel, SIGNAL(exitClicked()), this, SLOT(onSearchPanelExitClicked()));

    connect(mSearchPanel, SIGNAL(criteriaChanged(const QString&)), this, SLOT(onSearchPanelCriteriaChanged(const QString&)));

}

void HelpCategoryView::initVirtualKeyboard()

{

	mVirtualKeyboard = new HbStaticVkbHost(this);

    connect(mVirtualKeyboard, SIGNAL(keypadOpened()), this, SLOT(onHandleKeypadOpen()));

    connect(mVirtualKeyboard, SIGNAL(keypadClosed()), this, SLOT(onHandleKeypadClose()));

}

void HelpCategoryView::initEmptyLabel()

{

	HbLabel* label = mBuilder.findWidget<HbLabel*>(DOCML_NO_MATCH_LABEL);

	label->setFontSpec(HbFontSpec(HbFontSpec::Primary));

}

HbGroupBox* HelpCategoryView::groupBox()

{

	return mBuilder.findWidget<HbGroupBox*>(DOCML_GROUPBOX);

}

////////////////////////////////////////////////////////////////////////////////////////////

void HelpCategoryView::switchViewMode(ViewMode viewMode)

{

    if(ViewModeNull == viewMode) return;

    mViewMode = viewMode;

    if(ViewModeAll == viewMode)

    {

        mBuilder.load(QRC_DOCML_CATEGORY, DOCML_LAYOUT_CATEGORY_ALL);

		toolBar()->show();

    }

    else if(ViewModeSearch == viewMode)

    {

//        mBuilder.load(QRC_DOCML_CATEGORY, DOCML_LAYOUT_CATEGORY_SEARCH);

		ResetSearchPanel();

    }

}

////////////////////////////////////////////////////////////////////////////////////////////

void HelpCategoryView::expandCollapseAllList(QStandardItem* item, bool expand)

{

	if(item->rowCount() <= 0)

	{

		return;

	}

	mListAll->setExpanded(item->index(),expand);

	for(int i = 0; i < item->rowCount(); i++)

	{		

		expandCollapseAllList(item->child(i),expand);

	}

}

////////////////////////////////////////////////////////////////////////////////////////////

void HelpCategoryView::updateVisibleItems(bool visible)

{

	static Hb::SceneItems items = Hb::TitleBarItem | Hb::StatusBarItem;

	if(visible)

	{

		showItems(items);

	}

	else

	{

		hideItems(items);

	}

}

void HelpCategoryView::ResetSearchPanel()

{

    foreach(QGraphicsItem *obj, mSearchPanel->childItems())

    {

        QGraphicsWidget *const widget = static_cast<QGraphicsWidget*>(obj);

        if(widget != NULL)

        {

            HbLineEdit *const lineEdit = qobject_cast<HbLineEdit*>(widget);

            if(lineEdit != NULL)

            {

                lineEdit->setText("");

                break;

            }

        }

    }

}

////////////////////////////////////////////////////////////////////////////////////////////

// handle system event

void HelpCategoryView::onCurrentViewChanged(HbView *view)

{

    if(this == view)

    {

        setNavigationAction(mSoftKeyAction);        

    }

}

///////////////////////////////////////////////////////////////////////////////////////

// handle button back action

void HelpCategoryView::onBackAction()

{

	if(ViewModeSearch == mViewMode)

	{

		switchViewMode(ViewModeAll);

	}

	else

	{

		HbApplication::exit();

	}

}

////////////////////////////////////////////////////////////////////////////////////////////

// handle list event

void HelpCategoryView::onAllListActivated(const QModelIndex& index)

{

    if(!index.isValid() ||          // invalid

       index.child(0,0).isValid())  // this is a node

    {

        return;

    }

    QString uid = mListAll->model()->data(index.parent(), UidRole).toString();

    QString href = mListAll->model()->data(index, HrefRole).toString();

    HelpDataProvider::instance()->setHelpContentUrl(uid, href);

    emit activateView(HelpViewContents);

}

void HelpCategoryView::onSearchListActivated(const QModelIndex& index)

{

    if(!index.isValid() ||          // invalid

       index.child(0,0).isValid())  // this is a node

    {

        return;

    }

    QString uid = mListSearch->model()->data(index, UidRole).toString();

    QString href = mListSearch->model()->data(index, HrefRole).toString();

    HelpDataProvider::instance()->setHelpContentUrl(uid, href);

    emit activateView(HelpViewContents);

}

////////////////////////////////////////////////////////////////////////////////////////////

// handle search panel event

void HelpCategoryView::onSearchPanelExitClicked()

{

	if(mListSearch->model()->rowCount() == 0)

	{

		mBuilder.load(QRC_DOCML_CATEGORY, DOCML_LAYOUT_CATEGORY_SEARCH_NO_SRHPAL_NO_MATCH);

	}

	else

	{

		mBuilder.load(QRC_DOCML_CATEGORY, DOCML_LAYOUT_CATEGORY_SEARCH_NO_SRHPAL);

	}

	toolBar()->show();

}

void HelpCategoryView::onSearchPanelCriteriaChanged(const QString &criteria)

{

    HelpDataProvider::instance()->getSearchData(criteria);

	if(mListSearch->model()->rowCount() == 0)

	{

		mBuilder.load(QRC_DOCML_CATEGORY, DOCML_LAYOUT_CATEGORY_SEARCH_NO_MATCH);

	}

	else

	{

		mBuilder.load(QRC_DOCML_CATEGORY, DOCML_LAYOUT_CATEGORY_SEARCH);

	}

	toolBar()->hide();

	if(criteria.isEmpty())

	{

		groupBox()->setHeading(hbTrId(TXT_SETLABEL_SEARCH));

	}

	else

	{

		QString heading = qtTrId(TXT_SETLABEL_SEARCH_RESULTS);

		heading.append(COLON);

		heading.append(criteria);

		groupBox()->setHeading(heading);

	}

}

////////////////////////////////////////////////////////////////////////////////////////////

// handle virtual keyboard event

void HelpCategoryView::onHandleKeypadOpen()

{

	updateVisibleItems(false);

    qreal heightToSet = mainWindow()->layoutRect().height() - mVirtualKeyboard->keyboardArea().height();

    this->setMaximumHeight(heightToSet);

}

void HelpCategoryView::onHandleKeypadClose()

{	

	updateVisibleItems(true);

	qreal mainHeight  = mainWindow()->layoutRect().height();

	qreal toolbarHeight = toolBar()->size().height();

	qreal height = mainHeight - (toolBar()->isVisible() ? toolbarHeight : 0);

	this->setMaximumHeight(height);

}

////////////////////////////////////////////////////////////////////////////////////////////

// handle menu event

void HelpCategoryView::onExpandAll()

{

	QStandardItemModel* model = (QStandardItemModel*)(mListAll->model());

	expandCollapseAllList(model->invisibleRootItem(),true);

}

void HelpCategoryView::onCollapseAll()

{

	QStandardItemModel* model = (QStandardItemModel*)(mListAll->model());

	expandCollapseAllList(model->invisibleRootItem(),false);

}

// end of file