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#include "graphicslayouts_p.h"

#include <QtGui/qgraphicswidget.h>

#include <QtCore/qdebug.h>

QT_BEGIN_NAMESPACE

LinearLayoutAttached::LinearLayoutAttached(QObject *parent)

: QObject(parent), _stretch(1), _alignment(Qt::AlignCenter), _spacing(0)

{

}

void LinearLayoutAttached::setStretchFactor(int f)

{

    if (_stretch == f)

        return;

    _stretch = f;

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

}

void LinearLayoutAttached::setSpacing(int s)

{

    if (_spacing == s)

        return;

    _spacing = s;

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

}

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

{

    if (_alignment == a)

        return;

    _alignment = a;

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

}

QGraphicsLinearLayoutStretchItemObject::QGraphicsLinearLayoutStretchItemObject(QObject *parent)

    : QObject(parent)

{

}

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

{

Q_UNUSED(which);

Q_UNUSED(constraint);

return QSizeF();

}

QGraphicsLinearLayoutObject::QGraphicsLinearLayoutObject(QObject *parent)

: QObject(parent)

{

}

QGraphicsLinearLayoutObject::~QGraphicsLinearLayoutObject()

{

}

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

{

insertItem(index, item);

//connect attached properties

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)));

    //### need to disconnect when widget is removed?

}

}

//### is there a better way to do this?

void QGraphicsLinearLayoutObject::clearChildren()

{

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

    removeAt(i);

}

qreal QGraphicsLinearLayoutObject::contentsMargin() const

{

    qreal a,b,c,d;

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

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

        return a;

    return -1;

}

void QGraphicsLinearLayoutObject::setContentsMargin(qreal m)

{

    setContentsMargins(m,m,m,m);

}

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

{

QGraphicsLinearLayout::setStretchFactor(item, stretch);

}

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

{

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

        if(itemAt(i) == item){ //I do not see the reverse function, which is why we must loop over all items

            QGraphicsLinearLayout::setItemSpacing(i, spacing);

            return;

        }

    }

}

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

{

QGraphicsLinearLayout::setAlignment(item, alignment);

}

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

LinearLayoutAttached *QGraphicsLinearLayoutObject::qmlAttachedProperties(QObject *obj)

{

// ### This is not allowed - you must attach to any object

if (!qobject_cast<QGraphicsLayoutItem*>(obj))

    return 0;

LinearLayoutAttached *rv = new LinearLayoutAttached(obj);

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

return rv;

}

//////////////////////////////////////////////////////////////////////////////////////////////////////

// QGraphicsGridLayout-related classes

//////////////////////////////////////////////////////////////////////////////////////////////////////

GridLayoutAttached::GridLayoutAttached(QObject *parent)

: QObject(parent), _row(-1), _column(-1), _rowspan(1), _colspan(1), _alignment(-1), _rowstretch(-1),

    _colstretch(-1), _rowspacing(-1), _colspacing(-1), _rowprefheight(-1), _rowmaxheight(-1), _rowminheight(-1),

    _rowfixheight(-1), _colprefwidth(-1), _colmaxwidth(-1), _colminwidth(-1), _colfixwidth(-1)

{

}

void GridLayoutAttached::setRow(int r)

{

    if (_row == r)

        return;

    _row = r;

    //emit rowChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), _row);

}

void GridLayoutAttached::setColumn(int c)

{

    if (_column == c)

        return;

    _column = c;

    //emit columnChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), _column);

}

void GridLayoutAttached::setRowSpan(int rs)

{

    if (_rowspan == rs)

        return;

    _rowspan = rs;

    //emit rowSpanChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), _rowSpan);

}

void GridLayoutAttached::setColumnSpan(int cs)

{

    if (_colspan == cs)

        return;

    _colspan = cs;

    //emit columnSpanChanged(reinterpret_cast<QGraphicsLayoutItem*>(parent()), _columnSpan);

}

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

{

    if (_alignment == a)

        return;

    _alignment = a;

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

}

void GridLayoutAttached::setRowStretchFactor(int f)

{

    _rowstretch = f;

}

void GridLayoutAttached::setColumnStretchFactor(int f)

{

    _colstretch = f;

}

void GridLayoutAttached::setRowSpacing(int s)

{

    _rowspacing = s;

}

void GridLayoutAttached::setColumnSpacing(int s)

{

    _colspacing = s;

}

QGraphicsGridLayoutObject::QGraphicsGridLayoutObject(QObject *parent)

: QObject(parent)

{

}

QGraphicsGridLayoutObject::~QGraphicsGridLayoutObject()

{

}

void QGraphicsGridLayoutObject::addWidget(QGraphicsWidget *wid)

{

//use attached properties

if (QObject *obj = attachedProperties.value(qobject_cast<QGraphicsLayoutItem*>(wid))) {

    int row = static_cast<GridLayoutAttached *>(obj)->row();

    int column = static_cast<GridLayoutAttached *>(obj)->column();

    int rowSpan = static_cast<GridLayoutAttached *>(obj)->rowSpan();

    int columnSpan = static_cast<GridLayoutAttached *>(obj)->columnSpan();

    if (row == -1 || column == -1) {

        qWarning() << "Must set row and column for an item in a grid layout";

        return;

    }

    addItem(wid, row, column, rowSpan, columnSpan);

}

}

void QGraphicsGridLayoutObject::addLayoutItem(QGraphicsLayoutItem *item)

{

//use attached properties

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

    int row = obj->row();

    int column = obj->column();

    int rowSpan = obj->rowSpan();

    int columnSpan = obj->columnSpan();

    Qt::Alignment alignment = obj->alignment();

    if (row == -1 || column == -1) {

        qWarning() << "Must set row and column for an item in a grid layout";

        return;

    }

    if(obj->rowSpacing() != -1)

        setRowSpacing(row, obj->rowSpacing());

    if(obj->columnSpacing() != -1)

        setColumnSpacing(column, obj->columnSpacing());

    if(obj->rowStretchFactor() != -1)

        setRowStretchFactor(row, obj->rowStretchFactor());

    if(obj->columnStretchFactor() != -1)

        setColumnStretchFactor(column, obj->columnStretchFactor());

    if(obj->rowPreferredHeight() != -1)

        setRowPreferredHeight(row, obj->rowPreferredHeight());

    if(obj->rowMaximumHeight() != -1)

        setRowMaximumHeight(row, obj->rowMaximumHeight());

    if(obj->rowMinimumHeight() != -1)

        setRowMinimumHeight(row, obj->rowMinimumHeight());

    if(obj->rowFixedHeight() != -1)

        setRowFixedHeight(row, obj->rowFixedHeight());

    if(obj->columnPreferredWidth() != -1)

        setColumnPreferredWidth(row, obj->columnPreferredWidth());

    if(obj->columnMaximumWidth() != -1)

        setColumnMaximumWidth(row, obj->columnMaximumWidth());

    if(obj->columnMinimumWidth() != -1)

        setColumnMinimumWidth(row, obj->columnMinimumWidth());

    if(obj->columnFixedWidth() != -1)

        setColumnFixedWidth(row, obj->columnFixedWidth());

    addItem(item, row, column, rowSpan, columnSpan);

    if (alignment != -1)

        setAlignment(item,alignment);

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

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

    //### need to disconnect when widget is removed?

}

}

//### is there a better way to do this?

void QGraphicsGridLayoutObject::clearChildren()

{

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

    removeAt(i);

}

qreal QGraphicsGridLayoutObject::spacing() const

{

if (verticalSpacing() == horizontalSpacing())

    return verticalSpacing();

return -1;  //###

}

qreal QGraphicsGridLayoutObject::contentsMargin() const

{

    qreal a,b,c,d;

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

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

        return a;

    return -1;

}

void QGraphicsGridLayoutObject::setContentsMargin(qreal m)

{

    setContentsMargins(m,m,m,m);

}

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

{

QGraphicsGridLayout::setAlignment(item, alignment);

}

QHash<QGraphicsLayoutItem*, GridLayoutAttached*> QGraphicsGridLayoutObject::attachedProperties;

GridLayoutAttached *QGraphicsGridLayoutObject::qmlAttachedProperties(QObject *obj)

{

// ### This is not allowed - you must attach to any object

if (!qobject_cast<QGraphicsLayoutItem*>(obj))

    return 0;

GridLayoutAttached *rv = new GridLayoutAttached(obj);

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

return rv;

}

QT_END_NAMESPACE