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

**

** 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 HbInput 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 <QGraphicsScene>

#include <QGraphicsSceneMouseEvent>

#include <hbcolorscheme.h>

#include "hbinputpreviewlabel.h"

#include "hbfontspec.h"

/*!

    \fn void HbPreviewLabel::selected()

    This signal is emitted when there is a mouse press event.

*/

/*!

Constructor.

@param previewSymbols The string of the label and parent Graphics Item.

*/

HbPreviewLabel::HbPreviewLabel(QString previewSymbols, QGraphicsItem *parent)

    :HbWidget(parent),

    mTextItem(0)

{

        mTextItem = static_cast<HbTextItem*>(this->style()->createPrimitive(HbStyle::P_Label_text, this));

        mTextItem->setText(previewSymbols);

        mTextItem->setAlignment(Qt::AlignCenter);

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

}

/*!

Destroy the object

*/

HbPreviewLabel::~HbPreviewLabel()

{

}

/*!

sets geometry of textItem

@param itemsize the Geometry of Button.

*/

void HbPreviewLabel::setTextGeometry(qreal width, qreal height)

{

	QColor color = HbColorScheme::color("qtc_editor_normal");

    QRectF rect;

    rect.setWidth(width/2);

    rect.setHeight(height);

    if (color.isValid()) {

        mTextItem->setTextColor(color);

    }

    mTextItem->setGeometry(rect);

}

/*!

This function handles the mouse press event.

@param event The mouse events in the graphics view framework.

*/

void HbPreviewLabel::mousePressEvent(QGraphicsSceneMouseEvent * event)

{

    Q_UNUSED(event);

    emit showAccentedPreview(mTextItem->text(),sceneBoundingRect());

}

/*!

This function handles the mouse move event.

@param event The mouse events in the graphics view framework.

In case of a key/touch movement will activate a mousePressEvent on another Label

and the next Label is set as the grabber item.

*/

void HbPreviewLabel::mouseMoveEvent(QGraphicsSceneMouseEvent * event)

{

    bool transfered = false;

    if (!isUnderMouse()) {

        // get the list of item's at current mouse position

        QList<QGraphicsItem *> list = scene()->items(event->scenePos());

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

            // let's check if we have HbPreviewLabel

            HbPreviewLabel *label  = hbpreviewlabel_cast(list.at(i));

            if (label  && label->isEnabled() && (label->parent() == parent())) {

                // release old label

                ungrabMouse();

                event->setButton(Qt::LeftButton);

                // now call the mousepressEvent function of the Label under mouse

                QGraphicsSceneMouseEvent pressEvent;

                pressEvent.setButton(Qt::LeftButton);

                label->mousePressEvent(&pressEvent);

                // now to make label under cursor to get mouse events we have to manually make that Label

                // a mouse grabber item. after this Label will start recieving the press movements.

                label->grabMouse();

                transfered = true;

                break;

            }

        }

        QRectF rect = boundingRect();

        QPointF pos = event->pos();

        if (!transfered && (pos.y() < 0  ||pos.y() > rect.height() || pos.x() > rect.width() || pos.x() < 0) ) {

            emit hideAccentedPreview();

        }

    }

    if (!transfered) {

        if (isUnderMouse()) {

            QGraphicsSceneMouseEvent pressEvent;

            pressEvent.setButton(Qt::LeftButton);

            HbPreviewLabel::mousePressEvent(&pressEvent);

        }

    }

}

/*!

This function handles the mouse release event.

@param event The mouse events in the graphics view framework.

emits the signal selected to input the corrosponding character mapped to the key whenever

a key is released and afterwards hides the PreviewPopup by emiitting hidePreview

*/

void HbPreviewLabel::mouseReleaseEvent(QGraphicsSceneMouseEvent * event)

{

    Q_UNUSED(event);

    if (isUnderMouse()) {

        emit selected();

    }

    emit hidePreview();

    ungrabMouse();

}

// End Of File