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

**

** 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 HbFeedback 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 "hbabstractfeedback.h"

#include <QGraphicsItem>

#include <QGraphicsView>

class HbAbstractFeedbackPrivate

{

public:

    ~HbAbstractFeedbackPrivate() {};

    QRect mapWidgetToWindow(const QGraphicsItem* graphicsItem, const QGraphicsView* graphicsView);

    QRect mapWidgetToWindow(const QWidget* widget);

public:

    QPointer<QWidget> cWindow;

    QRect cRect;

};

/*!

\internal

@{

    Maps the widget rectangle to the parent window

    co-ordinate system.

@}

*/

QRect HbAbstractFeedbackPrivate::mapWidgetToWindow(const QWidget* widget)

{

    // null rectangle

    QRect mappedRect = QRect();

    if (widget && widget->window()) {

        QRect widgetRect = widget->rect();

        // from widget to parent window coordinates

        QPoint topLeft = widget->mapTo(widget->window(),

                                       widgetRect.topLeft());

        QPoint bottomRight = widget->mapTo(widget->window(),

                                           widgetRect.bottomRight());

        mappedRect = QRect(topLeft, bottomRight);

    }

    return mappedRect;

}

/*!

\internal

@{

    Maps the graphics widget bounding rectangle trough a

    given graphics view view port to the parent window

    co-ordinate system.

 @}

*/

QRect HbAbstractFeedbackPrivate::mapWidgetToWindow(const QGraphicsItem* graphicsWidget,

        const QGraphicsView* graphicsView)

{

    // null rectangle

    QRect mappedRect = QRect();

    if (graphicsWidget && graphicsView && graphicsView->window()) {

        // belong to same scene

        if (graphicsView->scene()

                && graphicsView->scene() == graphicsWidget->scene()) {

            // from scene to graphics view coordinates

            mappedRect = graphicsView->mapFromScene(

                             graphicsWidget->mapToScene(

                                 graphicsWidget->boundingRect()

                             ).boundingRect()

                         ).boundingRect();

            // from graphics view to window coordinates

            QPoint topLeft = graphicsView->mapTo(

                                 graphicsView->window(), mappedRect.topLeft());

            QPoint bottomRight = graphicsView->mapTo(

                                     graphicsView->window(), mappedRect.bottomRight());

            mappedRect = QRect(topLeft, bottomRight);

        }

    }

    return mappedRect;

}

/*!

    @beta

    @hbfeedback

    \class HbAbstractFeedback

    \brief Abstract base class for different haptic feedback effects.

    Concrete feedback objects have to define their type HbFeedback::Type by overriding the method type().

    Provides common methods for assigning the parent window and the feedback area for the feedback effect.

    \sa HbInstantFeedback, HbContinuousFeedback, HbTacticonFeedback

*/

/*!

    \fn HbFeedback::Type HbAbstractFeedback::type() const

    Returns the haptic type of the feedback object. Every derived class has to define their a type.

*/

/*!

    \fn QWidget* HbAbstractFeedback::window() const

    Returns the owning widget, null if not defined.

*/

QWidget* HbAbstractFeedback::window() const

{

    return d->cWindow;

}

/*!

    \fn bool HbAbstractFeedback::isLocated() const

    Returns true if both the parent window and the feedback area rectange (in relation to the parent window) has been defined. Not all feedback objects have to be located.

*/

bool HbAbstractFeedback::isLocated() const

{

    return d->cWindow && d->cRect.isValid();

}

/*!

    \fn bool HbAbstractFeedback::isValid() const

    Whether or not all the necessary parameters have been defined for the feedback object. What constitutes as valid differs between different types of feedback.

*/

/*!

    \fn QRect HbAbstractFeedback::rect() const

    Returns the feedback area rect in relation of it's parent widget.

*/

QRect HbAbstractFeedback::rect() const

{

    return d->cRect;

}

/*!

    \fn void HbAbstractFeedback::setRect(QRect rect)

    Sets the feedback area rect in relation of it's parent widget.

*/

void HbAbstractFeedback::setRect(QRect rect)

{

    d->cRect = rect;

}

/*!

    Constructor.

*/

HbAbstractFeedback::HbAbstractFeedback() : d(new HbAbstractFeedbackPrivate)

{

}

/*!

    Destructor.

*/

HbAbstractFeedback::~HbAbstractFeedback()

{

    delete d;

}

/*!

    Inherits feedback area rect from the given widget. Position is calculated relative to the parent window.

*/

void HbAbstractFeedback::setRect(const QWidget* widget)

{

    if (widget) {

        d->cRect = d->mapWidgetToWindow(widget);

    }

}

/*!

    Inherits feedback area rect from the graphics item in relation to the parent graphics view. Position is calculated relative to the window.

*/

void HbAbstractFeedback::setRect(const QGraphicsItem* graphicsItem, const QGraphicsView* graphicsView)

{

    if (graphicsItem && graphicsView && graphicsView->window()) {

        d->cRect = d->mapWidgetToWindow(graphicsItem, graphicsView);

    }

}

/*!

    Sets window that initiates the feedback. If given QWidget is not a window,

    uses the parent window instead.

*/

void HbAbstractFeedback::setOwningWindow(const QWidget* widget)

{

    d->cWindow = 0;

    if (widget && widget->window()) {

        d->cWindow = widget->window();

    }

}

/*!

    Assigns a copy of the feedback \a feedback to this feedback, and returns a

    reference to it.

*/

HbAbstractFeedback &HbAbstractFeedback::operator=(const HbAbstractFeedback & feedback)

{

    setRect(feedback.rect());

    setOwningWindow(feedback.window());

    return *this;

}

/*!

    Returns true if this feedback has the same configuration as the feedback \a

    feedback; otherwise returns false.

*/

bool HbAbstractFeedback::operator==(const HbAbstractFeedback &feedback) const

{

    return (d->cRect == feedback.rect()

            && d->cWindow == feedback.window()

            && type() == feedback.type());

}

/*!

    Returns true if this feedback has different configuration than the feedback \a

    feedback; otherwise returns false.

*/

bool HbAbstractFeedback::operator!=(const HbAbstractFeedback &feedback) const

{

    return !(*this == feedback);

}