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#include "qxpaintitem.h"
#include "qxpaintitem_p.h"
#include "utilities.h"

/*!
    \class QxPaintItem

    The QxPaintItem makes it possible to use the QPainter API in a scene graph.
    It sets up a textured rectangle in the scene graph and uses
    a QPainter to paint onto the texture. Call update() to trigger a repaint.

    QxPaintItem is meant to make it easier to port old code that is using the
    QPainter API to the scene graph API.
*/

QxPaintItemPrivate::QxPaintItemPrivate()
    : QxItemPrivate()
    , m_opaque_painting(false)
    , m_dirty(false)
{
}

/*!
    Constructs a QxPaintItem with \a parent.
*/
QxPaintItem::QxPaintItem(QxItem *parent)
    : QxItem(*(new QxPaintItemPrivate), parent)
{
    Q_D(QxPaintItem);
    d->m_node.setPaintItem(this);
}

/*!
    \internal
*/
QxPaintItem::QxPaintItem(QxPaintItemPrivate &dd, QxItem *parent)
  : QxItem(dd, parent)
{
    Q_D(QxPaintItem);
    d->m_node.setPaintItem(this);
}

/*!
    Destroys the QxPaintItem.
*/
QxPaintItem::~QxPaintItem()
{
}

/*!
    Causes a repaint of the item and the scene graph.
*/
void QxPaintItem::update()
{
    Q_D(QxPaintItem);
    d->m_dirty = true;
    d->m_node.markDirty(Node::DirtyMaterial);
}

/*!
    Initializes the item and triggers the first paint.
*/
void QxPaintItem::componentComplete()
{
    Q_D(QxPaintItem);
    QxItem::componentComplete();
    d->m_node.setSize(size().toSize());
    setPaintNode(&d->m_node);
    update();
}

/*!
    Updates the item geometry.
*/
void QxPaintItem::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
    Q_D(QxPaintItem);
    if (newGeometry.size() != oldGeometry.size()) {
        d->m_node.setSize(newGeometry.size().toSize());
        update();
    }
    QxItem::geometryChanged(newGeometry, oldGeometry);
}

/*!
    Updates the item opacity.
*/
void QxPaintItem::renderOpacityChanged(qreal newOpacity, qreal oldOpacity)
{
    Q_D(QxPaintItem);
    if (newOpacity != oldOpacity)
        d->m_node.setOpacity(newOpacity);
    QxItem::renderOpacityChanged(newOpacity, oldOpacity);
}

/*!
    Updates the item's texture filtering.
*/
void QxPaintItem::smoothChange(bool newSmooth, bool oldSmooth)
{
    Q_D(QxPaintItem);
    if (newSmooth != oldSmooth) {
        d->m_node.setSmoothPainting(newSmooth);
        d->m_node.setLinearFiltering(newSmooth);
        update();
    }
    QxItem::smoothChange(newSmooth, oldSmooth);
}

/*!
    Sets a hint saying that the item is painted opaque.

    Set \a opaque to true if paint() fills the entire item with opaque pixels.
    Setting \a opaque to true can improve performance. This property is
    independent of opacity.

    \sa opaquePainting()
*/
void QxPaintItem::setOpaquePainting(bool opaque)
{
    Q_D(QxPaintItem);
    if (opaque == d->m_opaque_painting)
        return;
    d->m_opaque_painting = opaque;
    d->m_node.updateTexture();
}

/*!
    Returns the hint saying that the item is painted opaque.

    \sa opaquePainting()
*/
bool QxPaintItem::opaquePainting() const
{
    Q_D(const QxPaintItem);
    return d->m_opaque_painting;
}

void QxPaintItem::setDirty(bool dirty)
{
    Q_D(QxPaintItem);
    d->m_dirty = dirty;
}

bool QxPaintItem::isDirty() const
{
    Q_D(const QxPaintItem);
    return d->m_dirty;
}