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#include "linearlayout.h"

#include <QGraphicsWidget>

#include <QGraphicsLayoutItem>

LinearLayoutAttached::LinearLayoutAttached(QObject *parent)

: QObject(parent), m_stretch(1), m_alignment(Qt::AlignTop), m_spacing(0)

{

}

void LinearLayoutAttached::setStretchFactor(int f)

{

    if (m_stretch != f) {

        m_stretch = f;

        emit stretchChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_stretch);

    }

}

void LinearLayoutAttached::setSpacing(int s)

{

    if (m_spacing != s) {

        m_spacing = s;

        emit spacingChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_spacing);

    }

}

void LinearLayoutAttached::setAlignment(Qt::Alignment a)

{

    if (m_alignment != a) {

        m_alignment = a;

        emit alignmentChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), m_alignment);

    }

}

GraphicsLinearLayoutStretchItemObject::GraphicsLinearLayoutStretchItemObject(QObject *parent)

    : QObject(parent)

{

}

QSizeF GraphicsLinearLayoutStretchItemObject::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const

{

    Q_UNUSED(which);

    Q_UNUSED(constraint);

    return QSizeF();

}

GraphicsLinearLayoutObject::GraphicsLinearLayoutObject(QObject *parent)

: QObject(parent)

{

}

GraphicsLinearLayoutObject::~GraphicsLinearLayoutObject()

{

}

void GraphicsLinearLayoutObject::insertLayoutItem(int index, QGraphicsLayoutItem *item)

{

    insertItem(index, item);

    if (LinearLayoutAttached *obj = attachedProperties.value(item)) {

        setStretchFactor(item, obj->stretchFactor());

        setAlignment(item, obj->alignment());

        updateSpacing(item, obj->spacing());

        QObject::connect(obj, SIGNAL(stretchChanged(QGraphicsLayoutItem*,int)),

                         this, SLOT(updateStretch(QGraphicsLayoutItem*,int)));

        QObject::connect(obj, SIGNAL(alignmentChanged(QGraphicsLayoutItem*,Qt::Alignment)),

                         this, SLOT(updateAlignment(QGraphicsLayoutItem*,Qt::Alignment)));

        QObject::connect(obj, SIGNAL(spacingChanged(QGraphicsLayoutItem*,int)),

                         this, SLOT(updateSpacing(QGraphicsLayoutItem*,int)));

    }

}

void GraphicsLinearLayoutObject::removeAt(int index)

{

    QGraphicsLayoutItem *item = itemAt(index);

    if (item) {

        LinearLayoutAttached *obj = attachedProperties.value(item);

        obj->disconnect(this);

        attachedProperties.remove(item);

    }

    QGraphicsLinearLayout::removeAt(index);

}

void GraphicsLinearLayoutObject::clearChildren()

{

    // do not delete the removed items; they will be deleted by the QML engine

    while (count() > 0)

        removeAt(count()-1);

}

qreal GraphicsLinearLayoutObject::contentsMargin() const

{

    qreal a, b, c, d;

    getContentsMargins(&a, &b, &c, &d);

    if (a == b && a == c && a == d)

        return a;

    return -1;

}

void GraphicsLinearLayoutObject::setContentsMargin(qreal m)

{

    setContentsMargins(m, m, m, m);

}

void GraphicsLinearLayoutObject::updateStretch(QGraphicsLayoutItem *item, int stretch)

{

    QGraphicsLinearLayout::setStretchFactor(item, stretch);

}

void GraphicsLinearLayoutObject::updateSpacing(QGraphicsLayoutItem* item, int spacing)

{

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

        if (itemAt(i) == item) {

            QGraphicsLinearLayout::setItemSpacing(i, spacing);

            return;

        }

    }

}

void GraphicsLinearLayoutObject::updateAlignment(QGraphicsLayoutItem *item, Qt::Alignment alignment)

{

    QGraphicsLinearLayout::setAlignment(item, alignment);

}

QHash<QGraphicsLayoutItem*, LinearLayoutAttached*> GraphicsLinearLayoutObject::attachedProperties;

LinearLayoutAttached *GraphicsLinearLayoutObject::qmlAttachedProperties(QObject *obj)

{

    LinearLayoutAttached *rv = new LinearLayoutAttached(obj);

    if (qobject_cast<QGraphicsLayoutItem*>(obj))

        attachedProperties.insert(qobject_cast<QGraphicsLayoutItem*>(obj), rv);

    return rv;

}