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

**

** 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 <QGraphicsWidget>

#include <QPointer>

#include <QIcon>

#include <QGraphicsSceneMouseEvent>

#include <QGraphicsLinearLayout>

#if QT_VERSION >= 0x040600

#include <QGraphicsDropShadowEffect>

#endif

#include "hbdeviceprofile.h"

#include "hbdialog.h"

#include "hblabel.h"

#include "hbstyleoptionlabel.h"

#include "hbinputexactwordpopup.h"

#include "hbiconitem.h"

#include "hbinputsettingproxy.h"

#include "hbframeitem.h"

#include "hbframedrawer.h"

#include "hbcolorscheme.h"

#include "hbdialog_p.h"

const QSizeF  HbExactWordPopupSize(10,10);

const QPointF HbExactWordPopupStartupDisplay(12, 33);

class HbExactWordPopupPrivate : public HbDialogPrivate

{

    Q_DECLARE_PUBLIC(HbExactWordPopup)

public:

    HbExactWordPopupPrivate();

    ~HbExactWordPopupPrivate();

    void initBackground();

public:

    HbLabel *mText;

    HbStyleOptionLabel *mOption;

    HbIconItem *iconPrim;

    HbFrameItem *mPopupBackground;

};

HbExactWordPopupPrivate::HbExactWordPopupPrivate(){

    mText = 0;

    mOption = 0;

    iconPrim = 0;

}

HbExactWordPopupPrivate::~HbExactWordPopupPrivate(){

    delete mOption;

    mOption = 0;

}

void HbExactWordPopupPrivate::initBackground()

{

    Q_Q(HbExactWordPopup);

    mPopupBackground = static_cast<HbFrameItem*>(q->primitive( HbStyle::P_Popup_background));

    if( mPopupBackground == 0 ) {

        mPopupBackground = static_cast<HbFrameItem*>(q->style()->createPrimitive((HbStyle::Primitive)(HbStyle::P_Popup_background), q));

    }

    if ( mPopupBackground->frameDrawer().isNull()) {

        HbFrameDrawer* fd = new HbFrameDrawer("qtg_fr_popup_secondary", HbFrameDrawer::NinePieces);

        mPopupBackground->setFrameDrawer(fd);

    }

    // the size of the layout in the base class has been set to 0, reset it by passing an invalid size to setMinimumSize

    if(mainLayout) {

        mainLayout->setMinimumSize(-1, -1);

    }

}

HbExactWordPopup* HbExactWordPopup::instance( HbExactWordPopupIndicator indicatorArrow ) {

    static QPointer<HbExactWordPopup> exactWordPopup;

    if (!exactWordPopup) {

        // HbExactWordPopup is owned by the scene

        exactWordPopup = new HbExactWordPopup( 0, indicatorArrow );

    }

    return exactWordPopup;

}

/*!

    Constructor.

    \param parent An optional parameter.

*/

HbExactWordPopup::HbExactWordPopup(QGraphicsWidget *parent, HbExactWordPopupIndicator indicatorArrow ) :

    HbDialog(*new HbExactWordPopupPrivate(), parent)

{

    Q_D(HbExactWordPopup);

    d->mText = new HbLabel(this);

    d->mText->setAlignment(Qt::AlignCenter);

    d->setPriority(HbPopupPrivate::VirtualKeyboard + 1);  // Should be shown on top of virtual keyboard.

    d->initBackground();

    setTimeout(HbPopup::NoTimeout);

    setBackgroundFaded(false);

    setVisible(false);

    setDismissPolicy(HbPopup::TapInside);

    setFocusPolicy(Qt::ClickFocus);

    setContentWidget(d->mText);

    setModal(false);

#if QT_VERSION >= 0x040600

    // Make sure the excat word popup never steals focus.

    setFlag(QGraphicsItem::ItemIsPanel, true);

    setActive(false);

    // enable drop shadow for the preview pane

    QGraphicsDropShadowEffect *effect = new QGraphicsDropShadowEffect;

    effect->setBlurRadius(8);

    setGraphicsEffect(effect);

#endif

    d->mOption = new HbStyleOptionLabel();

    if(d->mOption != 0 ) {

        d->mOption->text = QString(" ");

        d->mOption->boundingRect = QRectF(HbExactWordPopupStartupDisplay,HbExactWordPopupSize);

        // for hardware keypad, we need to show the arrow to indicate the word

        // and in virtual keypad this is not needed, so set the image accordingly

        setIndicatorArrow( indicatorArrow );

        d->mOption->alignment = Qt::AlignCenter;

    }

    d->iconPrim = static_cast<HbIconItem*>(primitive(HbStyle::P_Label_icon));

    if(d->iconPrim == 0) {

        d->iconPrim = static_cast<HbIconItem*>(style()->createPrimitive((HbStyle::Primitive)(HbStyle::P_Label_icon), this));

    }

    style()->updatePrimitive(d->iconPrim, (HbStyle::Primitive)(HbStyle::P_Label_icon), d->mOption);

}

/*!

    Returns the text of the tooltip. The default value is "Exact Word popup text".

    \sa setText()

*/

QString HbExactWordPopup::text()

{

    Q_D(HbExactWordPopup);

    return d->mText->plainText();

}

/*!

    Sets the text of the label within the progress note.

    \sa text()

*/

void HbExactWordPopup::setText(const QString &newText)

{

    Q_D(HbExactWordPopup);

    d->mText->setPlainText(newText);

    QRectF ps=QRectF(QPointF(0,0), d->mText->preferredSize()).adjusted(-9,-9,9,9);

    resize(ps.size());

}

/*!

    Displays exact word popup at a given point

    \sa hideText()

*/

void HbExactWordPopup::showText(QPointF pos)

{

    // the popup should know at this stage in which main window/scene it's been launched at.

    int screenWidth = 0;

    if ( mainWindow() ) {

        screenWidth = HbDeviceProfile::profile(this).logicalSize().width();

    } else {

        // this is the fall-back if the main window is not know - can be removed when popup

        // is not relying on the primary window anymore.

        screenWidth = HbDeviceProfile::profile(mainWindow()).logicalSize().width();

    }

    const QRectF br = boundingRect();

    const qreal brCenter = br.width()/2;

    pos.setX(pos.x()-brCenter);

    // fix x position to keep tooltip visible

    const qreal requiredWidth = pos.x()+br.width();

    if (requiredWidth > screenWidth) {

        pos.setX(pos.x()-(requiredWidth-screenWidth));

    } else if (0 > pos.x()) {

        pos.setX(0);

    }

    pos.setY(pos.y()-br.height());

    setPos(pos);

    QSizeF mySize = size();

    mySize.setHeight(HbExactWordPopupSize.height());

    resize(mySize);    

    Q_D(HbExactWordPopup);

    d->mOption->boundingRect = QRectF(rect().center().x() - (HbExactWordPopupSize.width()/2),rect().bottom(),HbExactWordPopupSize.width(),HbExactWordPopupSize.height());

    style()->updatePrimitive(d->iconPrim, (HbStyle::Primitive)(HbStyle::P_Label_icon), d->mOption);

    show();

}

/*!

    Hides exact word popup

    \sa hideText()

*/

void HbExactWordPopup::hideText()

{

    close();

}

void HbExactWordPopup::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)

{

    if (contains(mapFromScene(event->scenePos()))) {

        // commit word only if mouse release event happens inside popup area

        emit exactWordSelected();

        // this call closes the popup, and this is called only when mouse relase event happens

        // inside popup area

        HbDialog::mouseReleaseEvent(event);

    }

    // if mouse release event happens outside popup area, don't commit or close the popup

}

void HbExactWordPopup::updatePrimitives()

{

    Q_D( HbExactWordPopup );

    d->mPopupBackground->frameDrawer().setFrameType(HbFrameDrawer::NinePieces);

    d->mPopupBackground->frameDrawer().setFrameGraphicsName("qtg_fr_popup_secondary");

    d->mPopupBackground->setGeometry(boundingRect());

	QColor col = HbColorScheme::color( "qtc_editor_normal" ); //popupforeground

    if (col.isValid()) {

        d->mText->setTextColor(col);

    }

}

// this method is called whenever there is a switch of keypad usage from h/w to virtual

// h/w keypad needs an indicator, whereas virtual does not, hence set the image appropriately.

void HbExactWordPopup::setIndicatorArrow( HbExactWordPopupIndicator indicatorArrow )

{

    Q_D( HbExactWordPopup );

    if (indicatorArrow == HbNoIndicatorArrow) {

        d->mOption->icon = (QString(""));

    } else {

        d->mOption->icon = (QString("qtg_mono_input_down"));

   }

}