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

**

** 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 HbCore 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 <QGraphicsSceneMouseEvent>

#include <hbview.h>

#include <hbdeviceprofile.h>

#include <hbmenu.h>

#include <hbaction.h>

#include <hbwidgetfeedback.h>

#include <hbinstance.h>

#include <hbnamespace.h>

#include <hbpangesture.h>

#include "hbtitlebar_p.h"

#include "hbtitlebar_p_p.h"

#include "hbmainwindow_p.h"

#include "hbnavigationbutton_p.h"

#include "hbindicatorbutton_p.h"

#include "hbtitlebarhandle_p.h"

#include "hbtitlepane_p.h"

/*

    \class HbTitleBar

    \brief HbTitleBar is the container class for common decorators. Decorators are

    components that are always available even if the view contents change.

 */

HbTitleBarPrivate::HbTitleBarPrivate() : 

    mMainWindow(0), mTitlePane(0), mNavigationButton(0), mIndicatorButton(0),

    mTitleBarHandle(0), mTouchAreaItem(0)

{

}

void HbTitleBarPrivate::delayedConstruction()

{

    Q_Q(HbTitleBar);

    mTitlePane->delayedConstruction();

    mIndicatorButton->delayedConstruction();

    mNavigationButton->delayedConstruction();

#ifdef HB_EFFECTS

    HbEffect::add(

        QStringList() << "decorator" << "decorator" << "decorator",

        QStringList() << "decorator_pressed" <<  "decorator_released" << "decorator_latched",

        QStringList() << "pressed" << "released" <<  "latched");

#endif

    q->connect(mTitlePane, SIGNAL(launchPopup(QPointF)), mMainWindow, SLOT(_q_launchMenu(QPointF)));

    q->connect(q, SIGNAL(activated(const QList<IndicatorClientInfo> &)), 

        mIndicatorButton, SLOT(activate(const QList<IndicatorClientInfo> &)));

    q->connect(q, SIGNAL(deactivated(const QList<IndicatorClientInfo> &)), 

        mIndicatorButton, SLOT(deactivate(const QList<IndicatorClientInfo> &)));

    q->connect(mMainWindow, SIGNAL(currentViewChanged(HbView*)), q, SLOT(currentViewChanged(HbView*)));

    q->connect(mDefaultNavigationAction, SIGNAL(triggered()), qApp, SLOT(quit()));  

    q->setFlag(QGraphicsItem::ItemIsPanel, true);

}

void HbTitleBarPrivate::init()

{

    Q_Q(HbTitleBar);

    // create title pane

    mTitlePane = new HbTitlePane(q);

    mTitlePane->setZValue(HbPrivate::TitlePaneZValue);

    mIndicatorButton = new HbIndicatorButton(q);

    mNavigationButton = new HbNavigationButton(q);

    // add default quit action

    mDefaultNavigationAction = new HbAction(Hb::QuitNaviAction, q);

    HbIcon icon = HbIcon(mDefaultNavigationAction->icon().iconName());

    // the default action's icon should mirror in case of a layout direction change

    icon.setMirroringMode(HbIcon::LayoutDirection);

    mDefaultNavigationAction->setIcon(icon);

    mDefaultNavigationAction->setText("Quit");

    mNavigationButton->setAction(mDefaultNavigationAction);

    HbStyle::setItemName(q, "titlebar");

    HbStyle::setItemName(mTitlePane, "title");

    HbStyle::setItemName(mIndicatorButton, "status");

    HbStyle::setItemName(mNavigationButton, "back");

    mPreviousTitleBarProperties = 0; // view not yet ready

    QObject::connect(this->mTitlePane, SIGNAL(panRight()), q, SLOT(gestureRight()));

    QObject::connect(this->mTitlePane, SIGNAL(panLeft()), q, SLOT(gestureLeft()));

}

void HbTitleBarPrivate::initSceneEventFilters(HbView *view)

{

    Q_Q(HbTitleBar);

    if (view->viewFlags() & HbView::ViewTitleBarMinimizable) {

        if(!mTouchAreaItem) {

            // Install sceneEvent filter(s)

            mTouchAreaItem = q->style()->createPrimitive(HbStyle::P_TitleBar_toucharea, q);

            mTouchAreaItem->setAcceptedMouseButtons(Qt::LeftButton);

            mTouchAreaItem->installSceneEventFilter(q);

            QGraphicsObject *touchAreaItemGraphicsObject = static_cast<QGraphicsObject*>(mTouchAreaItem);

            touchAreaItemGraphicsObject->grabGesture(Qt::PanGesture);

        }

    } else { // Remove scene event filter

        if (mTouchAreaItem) {

            mTouchAreaItem->removeSceneEventFilter(q);

            delete mTouchAreaItem;

            mTouchAreaItem = 0;

        }

    }

}

void HbTitleBarPrivate::initTitleBarHandle(HbView *view)

{

    Q_Q(HbTitleBar);

    if (view->viewFlags() & HbView::ViewTitleBarMinimizable) {

        if (!mTitleBarHandle) { // Create title bar handle

            mTitleBarHandle = new HbTitleBarHandle(q);

            HbStyle::setItemName(mTitleBarHandle, "handle");

#ifdef HB_EFFECTS

            HbEffect::add(

                QStringList() << "titlebar" << "titlebar",

                QStringList() << "titlebar_minimize" <<  "titlebar_maximize",

                QStringList() << "minimize" << "maximize");

#endif

        }

    } else {

        if (mTitleBarHandle) { // Remove title bar handle

            delete mTitleBarHandle;

            mTitleBarHandle = 0;

#ifdef HB_EFFECTS

            HbEffect::remove("titlebar", "titlebar_minimize", "minimize");

            HbEffect::remove("titlebar", "titlebar_maximize", "maximize");

#endif

        }

    }

}

/*

    Constructor, the titlebar.

    \param mainWindow is the owner for this titlebar.

    The \a parent is an optional parameter.

*/

HbTitleBar::HbTitleBar(HbMainWindow *mainWindow, QGraphicsItem *parent /*= 0*/)

    : HbWidget(*new HbTitleBarPrivate, parent)

{

    Q_D(HbTitleBar);

    d->q_ptr = this;

    d->mMainWindow = mainWindow;

    d->init();

}

HbTitleBar::HbTitleBar(HbTitleBarPrivate &dd, HbMainWindow *mainWindow,

                       QGraphicsItem *parent)

    : HbWidget(dd, parent)

{

    Q_D(HbTitleBar);

    d->q_ptr = this;

    d->mMainWindow = mainWindow;

    d->init();

}

/*

    Destructor.

 */

HbTitleBar::~HbTitleBar()

{ 

    Q_D(HbTitleBar);

    // Remove scene event filter

    if (d->mTouchAreaItem) {

        d->mTouchAreaItem->removeSceneEventFilter(this);

        delete d->mTouchAreaItem;

        d->mTouchAreaItem = 0;

    }

}

/*

    Delayed constructor.

 */

void HbTitleBar::delayedConstruction()

{

       Q_D(HbTitleBar);

       d->delayedConstruction();

}

/*

    titlePane. Return titlepane decorator.

*/

HbTitlePane *HbTitleBar::titlePane() const

{

    Q_D(const HbTitleBar);

    return d->mTitlePane;

}

/*

    minimizable. Used to switch between layout with and without titlebar handle.

*/

bool HbTitleBar::minimizable() const

{

    Q_D(const HbTitleBar);

    if (!d->mMainWindow->currentView()) {

        return false;

    }

    return d->mMainWindow->currentView()->viewFlags() & HbView::ViewTitleBarMinimizable;

}

/*

    propertiesChanged. Do the repolish for titlebar and indicator group.

*/

void HbTitleBar::propertiesChanged()

{

    Q_D(HbTitleBar);

    if (d->mMainWindow->currentView()) {

        currentViewChanged(d->mMainWindow->currentView());

    }

}

/*

    position. Return titlebar position.

*/

HbTitleBar::Position HbTitleBar::position() const

{

    QTransform transf = transform();

    Position pos = Original;

    if ((qAbs(transf.dx()) > 1) && (qAbs(transf.dy()) < 1)) {

        pos = Minimized;

    } else if ((qAbs(transf.dx()) > 1) && (qAbs(transf.dy()) > 1)) {

        pos = DismissedUp;

    }

    return pos;

}

HbAction *HbTitleBar::navigationAction() const

{

    Q_D(const HbTitleBar);

    return d->mNavigationButton->action();

}

void HbTitleBar::setNavigationAction(HbAction *action)

{

    Q_D(HbTitleBar);

    d->mNavigationButton->setAction(action);

}

void HbTitleBar::setDefaultNavigationAction()

{

    Q_D(HbTitleBar);

    setNavigationAction(d->mDefaultNavigationAction);

}

/*

    gestureRight. Handles left-to-right flick.

            if(layoutDirection() == Qt::LeftToRight) {

*/

void HbTitleBar::gestureRight()

{

    Q_D(HbTitleBar);

    if (!minimizable()) {

        return;

    }

    HbWidgetFeedback::triggered(this, Hb::InstantFlicked);

    Position p(position());

    QSize screenSize = HbDeviceProfile::profile(this).logicalSize();

    QRectF handleRect = d->mTitleBarHandle->boundingRect();

    if (d->mMainWindow &&

        d->mIndicatorButton->isVisible() &&

        p == HbTitleBar::Original) {

#ifdef HB_EFFECTS

        //grabMouse(); // this prevents taps/gestures on top of animating titlebar

        QRectF extRect(scenePos().x(), 0.0, screenSize.width(), 10.0);

        HbEffect::start(this, "titlebar", "minimize", this, "effectFinished", QVariant(), extRect);

#else // no effects, just do the translation

        translate(screenSize.width()-handleRect.width(), 0);

#endif //HB_EFFECTS

    } 

}

/*

    gestureLeft. Handles right-to-left flick.

*/

void HbTitleBar::gestureLeft()

{

    Q_D(HbTitleBar);

    if (!minimizable()) {

        return;

    }

    HbWidgetFeedback::triggered(this, Hb::InstantFlicked);

    Position p(position());

    QSize screenSize = HbDeviceProfile::profile(this).logicalSize();

    QRectF handleRect = d->mTitleBarHandle->boundingRect();

    // only way to reliable find the position of titlebar is using

    // titlebar's transformation information

    if (d->mMainWindow &&

        d->mIndicatorButton->isVisible() &&

        p == HbTitleBar::Minimized) {

#ifdef HB_EFFECTS

        //grabMouse(); // this prevents taps/gestures on top of animating titlebar

        // effect translates widget from rect's right x-coordinate to left x-coordinate

        QRectF extRect(-handleRect.width(), 0.0, scenePos().x(), 10.0); // height not used in effect

        HbEffect::start(this, "titlebar", "maximize", this, "effectFinished", QVariant(), extRect);

#else // no effects, just do the translation

        translate(x()-scenePos().x(), y()-scenePos().y());

#endif //HB_EFFECTS

    } 

}

#ifdef HB_EFFECTS

void HbTitleBar::effectFinished(const HbEffect::EffectStatus &status)

{

    Q_D(HbTitleBar);

    //ungrabMouse();

    if (status.reason == Hb::EffectFinished) {

        // change titlebar property accordingly

        if (d->mMainWindow->currentView()) {

            if (position() == Minimized) {

                d->mMainWindow->currentView()->setViewFlags(

                    d->mMainWindow->currentView()->viewFlags() | HbView::ViewTitleBarMinimized);

                    d->mTitlePane->resetMode();

                    d->mTitlePane->updatePrimitives();

            } else {

                d->mMainWindow->currentView()->setViewFlags(

                    d->mMainWindow->currentView()->viewFlags() & (~HbView::ViewTitleBarMinimized));

            }

        }

        emit titleBarStateChanged();

    }

}

#endif //HB_EFFECTS

/*!

This slot is called when active HbView changes.

*/ 

void HbTitleBar::currentViewChanged(HbView *view)

{

    Q_D(HbTitleBar);

    // this can happpen when e.g. view is destroyed

    if (!view) {

        return;

    }

    QTransform transform;

    // first check if we shouldn't be minimized

    if (position() == HbTitleBar::Minimized) {

        if (!(view->viewFlags() & HbView::ViewTitleBarMinimizable)) {

            setTransform(transform); // this sets titlebar to (0,0)

        } else if ((view->viewFlags() & HbView::ViewTitleBarMinimizable) &&

            !(view->viewFlags() & HbView::ViewTitleBarMinimized)) {

            setTransform(transform); // this sets titlebar to (0,0)

        }

    } else if (view->viewFlags() & HbView::ViewTitleBarMinimized) {

        setTransform(transform); // this sets titlebar to (0,0)

        QSize screenSize = HbDeviceProfile::profile(this).logicalSize();

        if (layoutDirection() == Qt::LeftToRight) {

            translate(screenSize.width(), 0);

        } else {

            translate(-screenSize.width(), 0);

        }

    }

    // only do repolish if titlebar properties have changed

    if (d->mPreviousTitleBarProperties != view->viewFlags()) {

        d->initTitleBarHandle(view);

        d->initSceneEventFilters(view);

        d->mPreviousTitleBarProperties = view->viewFlags();

        d->mTitlePane->updatePrimitives();

        d->mIndicatorButton->updatePrimitives();

        d->mNavigationButton->updatePrimitives();

        repolish();

    }

    if (mainWindow() && mainWindow()->currentView()) {

        mainWindow()->currentView()->menu()->installEventFilter(d->mTitlePane);

    }

    d->mTitlePane->repolish();

}

void HbTitleBar::polish(HbStyleParameters &params)

{

    Q_D(HbTitleBar);

    // update handle visibility according to titlebar properties of the current view

    if (mainWindow() && mainWindow()->currentView()) {

        int viewFlags = mainWindow()->currentView()->viewFlags();

        if (viewFlags & HbView::ViewTitleBarMinimizable) {

            d->mIndicatorButton->showHandleIndication(true);

        } else {

            d->mIndicatorButton->showHandleIndication(false);

        }

    }

    HbWidget::polish(params);

}

//filtering touchitem (titlebarhandle) mouse events.

bool HbTitleBar::sceneEventFilter(QGraphicsItem *watched, QEvent *event)

{

    Q_UNUSED(watched)

    Q_D(HbTitleBar);

    bool filterOutEvent = false;

    switch(event->type()){

    case QEvent::GraphicsSceneMousePress:

        HbWidgetFeedback::triggered(this, Hb::InstantPressed);

        event->accept(); //we need to catch the mouse release and move events also

        filterOutEvent = true;

        break;

    case QEvent::GraphicsSceneMouseRelease:

        HbWidgetFeedback::triggered(this, Hb::InstantClicked);

        if (d->mHandleDown) {

            d->mHandleDown = false;

            HbWidgetFeedback::triggered(this, Hb::InstantReleased);

        }

        filterOutEvent = true;

        break;

    case QEvent::GraphicsSceneMouseMove: {

        QGraphicsSceneMouseEvent *mouseEvent =

                static_cast<QGraphicsSceneMouseEvent*>(event);

        if (d->mTouchAreaItem && d->mTouchAreaItem->contains(

                d->mTouchAreaItem->mapFromScene(mouseEvent->scenePos()))) {

            if (!d->mHandleDown) {

                d->mHandleDown = true;

                HbWidgetFeedback::triggered(this, Hb::InstantPressed);

            }

        } else if (d->mHandleDown) {

            d->mHandleDown = false;

            HbWidgetFeedback::triggered(this, Hb::InstantReleased);

        }

        filterOutEvent = true;

        break;

    }

    case QEvent::Gesture: {

        QGestureEvent *gestureEvent = static_cast<QGestureEvent*>(event);

        if (HbPanGesture *pan = qobject_cast<HbPanGesture*>(gestureEvent->gesture(Qt::PanGesture))) {

            if(pan->state() == Qt::GestureUpdated || pan->state() == Qt::GestureFinished) {

                if(pan->sceneDelta().x() < -0) {

                    gestureLeft();

                }

                if(pan->sceneDelta().x() > 0) {

                    gestureRight();

                }

                gestureEvent->accept();

            }

        }

        filterOutEvent = true;

        break;

    }

    default:

        break;

    }

    return filterOutEvent;

}

/*!

    \reimp

*/

QGraphicsItem *HbTitleBar::primitive(const QString &itemName) const

{

    Q_D(const HbTitleBar);

    if (itemName == "") {

        return 0;

    } else {

        if (itemName == "title") {

            return d->mTitlePane;

        }

        else if (itemName == "status") {

            return d->mIndicatorButton;

        }

        else if (itemName == "back") {

            return d->mNavigationButton;

        }

        else if (itemName == "handle") {

            return d->mTitleBarHandle;

        }

        else if (itemName == "toucharea") {

            return d->mTouchAreaItem;

        } else {

            return 0;

        }

    }

}