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#include "private/qdeclarativeitem_p.h"

#include "qdeclarativeitem.h"

#include "private/qdeclarativeevents_p_p.h"

#include <private/qdeclarativeengine_p.h>

#include <qdeclarativeengine.h>

#include <qdeclarativeopenmetaobject_p.h>

#include <qdeclarativestate_p.h>

#include <qdeclarativeview.h>

#include <qdeclarativestategroup_p.h>

#include <qdeclarativecomponent.h>

#include <qdeclarativeinfo.h>

#include <QDebug>

#include <QPen>

#include <QFile>

#include <QEvent>

#include <QGraphicsSceneMouseEvent>

#include <QtCore/qnumeric.h>

#include <QtScript/qscriptengine.h>

#include <QtGui/qgraphicstransform.h>

#include <qlistmodelinterface_p.h>

#include <float.h>

QT_BEGIN_NAMESPACE

/*!

    \qmlclass Transform QGraphicsTransform

    \since 4.7

    \brief The Transform elements provide a way of building advanced transformations on Items.

    The Transform element is a base type which cannot be instantiated directly.

    The following concrete Transform types are available:

    \list

    \o \l Rotation

    \o \l Scale

    \o \l Translate

    \endlist

    The Transform elements let you create and control advanced transformations that can be configured

    independently using specialized properties.

    You can assign any number of Transform elements to an \l Item. Each Transform is applied in order,

    one at a time.

*/

/*!

    \qmlclass Translate QDeclarativeTranslate

    \since 4.7

    \brief The Translate object provides a way to move an Item without changing its x or y properties.

    The Translate object provides independent control over position in addition to the Item's x and y properties.

    The following example moves the Y axis of the \l Rectangle elements while still allowing the \l Row element

    to lay the items out as if they had not been transformed:

    \qml

    import Qt 4.7

    Row {

        Rectangle {

            width: 100; height: 100

            color: "blue"

            transform: Translate { y: 20 }

        }

        Rectangle {

            width: 100; height: 100

            color: "red"

            transform: Translate { y: -20 }

        }

    }

    \endqml

    \image translate.png

*/

/*!

    \qmlproperty real Translate::x

    The translation along the X axis.

*/

/*!

    \qmlproperty real Translate::y

    The translation along the Y axis.

*/

/*!

    \qmlclass Scale QGraphicsScale

    \since 4.7

    \brief The Scale element provides a way to scale an Item.

    The Scale element gives more control over scaling than using \l Item's \l{Item::scale}{scale} property. Specifically,

    it allows a different scale for the x and y axes, and allows the scale to be relative to an

    arbitrary point.

    The following example scales the X axis of the Rectangle, relative to its interior point 25, 25:

    \qml

    Rectangle {

        width: 100; height: 100

        color: "blue"

        transform: Scale { origin.x: 25; origin.y: 25; xScale: 3}

    }

    \endqml

    \sa Rotation, Translate

*/

/*!

    \qmlproperty real Scale::origin.x

    \qmlproperty real Scale::origin.y

    The point that the item is scaled from (i.e., the point that stays fixed relative to the parent as

    the rest of the item grows). By default the origin is 0, 0.

*/

/*!

    \qmlproperty real Scale::xScale

    The scaling factor for the X axis.

*/

/*!

    \qmlproperty real Scale::yScale

    The scaling factor for the Y axis.

*/

/*!

    \qmlclass Rotation QGraphicsRotation

    \since 4.7

    \brief The Rotation object provides a way to rotate an Item.

    The Rotation object gives more control over rotation than using \l Item's \l{Item::rotation}{rotation} property.

    Specifically, it allows (z axis) rotation to be relative to an arbitrary point.

    The following example rotates a Rectangle around its interior point 25, 25:

    \qml

    Rectangle {

        width: 100; height: 100

        color: "blue"

        transform: Rotation { origin.x: 25; origin.y: 25; angle: 45}

    }

    \endqml

    Rotation also provides a way to specify 3D-like rotations for Items. For these types of

    rotations you must specify the axis to rotate around in addition to the origin point.

    The following example shows various 3D-like rotations applied to an \l Image.

    \snippet doc/src/snippets/declarative/rotation.qml 0

    \image axisrotation.png

    \sa {declarative/ui-components/dialcontrol}{Dial Control example}, {declarative/toys/clocks}{Clocks example}

*/

/*!

    \qmlproperty real Rotation::origin.x

    \qmlproperty real Rotation::origin.y

    The origin point of the rotation (i.e., the point that stays fixed relative to the parent as

    the rest of the item rotates). By default the origin is 0, 0.

*/

/*!

    \qmlproperty real Rotation::axis.x

    \qmlproperty real Rotation::axis.y

    \qmlproperty real Rotation::axis.z

    The axis to rotate around. For simple (2D) rotation around a point, you do not need to specify an axis,

    as the default axis is the z axis (\c{ axis { x: 0; y: 0; z: 1 } }).

    For a typical 3D-like rotation you will usually specify both the origin and the axis.

    \image 3d-rotation-axis.png

*/

/*!

    \qmlproperty real Rotation::angle

    The angle to rotate, in degrees clockwise.

*/

QDeclarativeContents::QDeclarativeContents(QDeclarativeItem *item) : m_item(item), m_x(0), m_y(0), m_width(0), m_height(0)

{

    //### optimize

    connect(this, SIGNAL(rectChanged(QRectF)), m_item, SIGNAL(childrenRectChanged(QRectF)));

}

QDeclarativeContents::~QDeclarativeContents()

{

    QList<QGraphicsItem *> children = m_item->childItems();

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

        QDeclarativeItem *child = qobject_cast<QDeclarativeItem *>(children.at(i));

        if(!child)//### Should this be ignoring non-QDeclarativeItem graphicsobjects?

            continue;

        QDeclarativeItemPrivate::get(child)->removeItemChangeListener(this, QDeclarativeItemPrivate::Geometry | QDeclarativeItemPrivate::Destroyed);

    }

}

QRectF QDeclarativeContents::rectF() const

{

    return QRectF(m_x, m_y, m_width, m_height);

}

void QDeclarativeContents::calcHeight(QDeclarativeItem *changed)

{

    qreal oldy = m_y;

    qreal oldheight = m_height;

    if (changed) {

        qreal top = oldy;

        qreal bottom = oldy + oldheight;

        qreal y = changed->y();

        if (y + changed->height() > bottom)

            bottom = y + changed->height();

        if (y < top)

            top = y;

        m_y = top;

        m_height = bottom - top;

    } else {

        qreal top = FLT_MAX;

        qreal bottom = 0;

        QList<QGraphicsItem *> children = m_item->childItems();

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

            QDeclarativeItem *child = qobject_cast<QDeclarativeItem *>(children.at(i));

            if(!child)//### Should this be ignoring non-QDeclarativeItem graphicsobjects?

                continue;

            qreal y = child->y();

            if (y + child->height() > bottom)

                bottom = y + child->height();

            if (y < top)

                top = y;

        }

        if (!children.isEmpty())

            m_y = top;

        m_height = qMax(bottom - top, qreal(0.0));

    }

    if (m_height != oldheight || m_y != oldy)

        emit rectChanged(rectF());

}

void QDeclarativeContents::calcWidth(QDeclarativeItem *changed)

{

    qreal oldx = m_x;

    qreal oldwidth = m_width;

    if (changed) {

        qreal left = oldx;

        qreal right = oldx + oldwidth;

        qreal x = changed->x();

        if (x + changed->width() > right)

            right = x + changed->width();

        if (x < left)

            left = x;

        m_x = left;

        m_width = right - left;

    } else {

        qreal left = FLT_MAX;

        qreal right = 0;

        QList<QGraphicsItem *> children = m_item->childItems();

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

            QDeclarativeItem *child = qobject_cast<QDeclarativeItem *>(children.at(i));

            if(!child)//### Should this be ignoring non-QDeclarativeItem graphicsobjects?

                continue;

            qreal x = child->x();

            if (x + child->width() > right)

                right = x + child->width();

            if (x < left)

                left = x;

        }

        if (!children.isEmpty())

            m_x = left;

        m_width = qMax(right - left, qreal(0.0));

    }

    if (m_width != oldwidth || m_x != oldx)

        emit rectChanged(rectF());

}

void QDeclarativeContents::complete()

{

    QList<QGraphicsItem *> children = m_item->childItems();

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

        QDeclarativeItem *child = qobject_cast<QDeclarativeItem *>(children.at(i));

        if(!child)//### Should this be ignoring non-QDeclarativeItem graphicsobjects?

            continue;

        QDeclarativeItemPrivate::get(child)->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry | QDeclarativeItemPrivate::Destroyed);

        //###what about changes to visibility?

    }

    calcGeometry();

}

void QDeclarativeContents::itemGeometryChanged(QDeclarativeItem *changed, const QRectF &newGeometry, const QRectF &oldGeometry)

{

    Q_UNUSED(changed)

    //### we can only pass changed if the left edge has moved left, or the right edge has moved right

    if (newGeometry.width() != oldGeometry.width() || newGeometry.x() != oldGeometry.x())

        calcWidth(/*changed*/);

    if (newGeometry.height() != oldGeometry.height() || newGeometry.y() != oldGeometry.y())

        calcHeight(/*changed*/);

}

void QDeclarativeContents::itemDestroyed(QDeclarativeItem *item)

{

    if (item)

        QDeclarativeItemPrivate::get(item)->removeItemChangeListener(this, QDeclarativeItemPrivate::Geometry | QDeclarativeItemPrivate::Destroyed);

    calcGeometry();

}

void QDeclarativeContents::childRemoved(QDeclarativeItem *item)

{

    if (item)

        QDeclarativeItemPrivate::get(item)->removeItemChangeListener(this, QDeclarativeItemPrivate::Geometry | QDeclarativeItemPrivate::Destroyed);

    calcGeometry();

}

void QDeclarativeContents::childAdded(QDeclarativeItem *item)

{

    if (item)

        QDeclarativeItemPrivate::get(item)->addItemChangeListener(this, QDeclarativeItemPrivate::Geometry | QDeclarativeItemPrivate::Destroyed);

    calcWidth(item);

    calcHeight(item);

}

QDeclarativeItemKeyFilter::QDeclarativeItemKeyFilter(QDeclarativeItem *item)

: m_processPost(false), m_next(0)

{

    QDeclarativeItemPrivate *p =

        item?static_cast<QDeclarativeItemPrivate *>(QGraphicsItemPrivate::get(item)):0;

    if (p) {

        m_next = p->keyHandler;

        p->keyHandler = this;

    }

}

QDeclarativeItemKeyFilter::~QDeclarativeItemKeyFilter()

{

}

void QDeclarativeItemKeyFilter::keyPressed(QKeyEvent *event, bool post)

{

    if (m_next) m_next->keyPressed(event, post);

}

void QDeclarativeItemKeyFilter::keyReleased(QKeyEvent *event, bool post)

{

    if (m_next) m_next->keyReleased(event, post);

}

void QDeclarativeItemKeyFilter::inputMethodEvent(QInputMethodEvent *event, bool post)

{

    if (m_next) m_next->inputMethodEvent(event, post);

}

QVariant QDeclarativeItemKeyFilter::inputMethodQuery(Qt::InputMethodQuery query) const

{

    if (m_next) return m_next->inputMethodQuery(query);

    return QVariant();

}

void QDeclarativeItemKeyFilter::componentComplete()

{

    if (m_next) m_next->componentComplete();

}

/*!

    \qmlclass KeyNavigation QDeclarativeKeyNavigationAttached

    \since 4.7

    \brief The KeyNavigation attached property supports key navigation by arrow keys.

    It is common in key-based UIs to use arrow keys to navigate

    convenient way of specifying which item will gain focus

    when an arrow key is pressed.  The following example provides

    key navigation for a 2x2 grid of items.

    \code

    Grid {

        columns: 2

        width: 100; height: 100

        Rectangle {

            id: item1

            focus: true

            width: 50; height: 50

            color: focus ? "red" : "lightgray"

            KeyNavigation.right: item2

            KeyNavigation.down: item3

        }

        Rectangle {

            id: item2

            width: 50; height: 50

            color: focus ? "red" : "lightgray"

            KeyNavigation.left: item1

            KeyNavigation.down: item4

        }

        Rectangle {

            id: item3

            width: 50; height: 50

            color: focus ? "red" : "lightgray"

            KeyNavigation.right: item4

            KeyNavigation.up: item1

        }

        Rectangle {

            id: item4

            width: 50; height: 50

            color: focus ? "red" : "lightgray"

            KeyNavigation.left: item3

            KeyNavigation.up: item2

        }

    }

    \endcode

    By default KeyNavigation receives key events after the item it is attached to.

    If the item accepts an arrow key event, the KeyNavigation

    attached property will not receive an event for that key.  Setting the

    \l priority property to KeyNavigation.BeforeItem allows handling

    of the key events before normal item processing.

    If an item has been set for a direction and the KeyNavigation

    attached property receives the corresponding

    key press and release events, the events will be accepted by

    KeyNavigation and will not propagate any further.

    \sa {Keys}{Keys attached property}

*/

/*!

    \qmlproperty Item KeyNavigation::left

    \qmlproperty Item KeyNavigation::right

    \qmlproperty Item KeyNavigation::up

    \qmlproperty Item KeyNavigation::down

    These properties hold the item to assign focus to

    when Key_Left, Key_Right, Key_Up or Key_Down are

    pressed.

*/

QDeclarativeKeyNavigationAttached::QDeclarativeKeyNavigationAttached(QObject *parent)

: QObject(*(new QDeclarativeKeyNavigationAttachedPrivate), parent),

  QDeclarativeItemKeyFilter(qobject_cast<QDeclarativeItem*>(parent))

{

    m_processPost = true;

}

QDeclarativeKeyNavigationAttached *

QDeclarativeKeyNavigationAttached::qmlAttachedProperties(QObject *obj)

{

    return new QDeclarativeKeyNavigationAttached(obj);

}

QDeclarativeItem *QDeclarativeKeyNavigationAttached::left() const

{

    Q_D(const QDeclarativeKeyNavigationAttached);

    return d->left;

}

void QDeclarativeKeyNavigationAttached::setLeft(QDeclarativeItem *i)

{

    Q_D(QDeclarativeKeyNavigationAttached);

    d->left = i;

}

QDeclarativeItem *QDeclarativeKeyNavigationAttached::right() const

{

    Q_D(const QDeclarativeKeyNavigationAttached);

    return d->right;