OpenBoard/src/domain/UBGraphicsSvgItem.cpp

/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "UBGraphicsSvgItem.h"

#include <QtGui>

#include "UBGraphicsScene.h"
#include "UBGraphicsItemDelegate.h"
#include "UBGraphicsPixmapItem.h"

#include "core/memcheck.h"

UBGraphicsSvgItem::UBGraphicsSvgItem(const QString& pFilePath, QGraphicsItem* parent)
    : QGraphicsSvgItem(pFilePath, parent)
{
    init();

    QFile f(pFilePath);

    if (f.open(QIODevice::ReadOnly))
    {
        mFileData = f.readAll();
        f.close();
    }
}

UBGraphicsSvgItem::UBGraphicsSvgItem(const QByteArray& pFileData, QGraphicsItem* parent)
    : QGraphicsSvgItem(parent)
{
    init();

    QSvgRenderer* renderer = new QSvgRenderer(pFileData, this);

    setSharedRenderer(renderer);
    mFileData = pFileData;
}


void UBGraphicsSvgItem::init()
{
    setData(UBGraphicsItemData::ItemLayerType, UBItemLayerType::Object);

    setDelegate(new UBGraphicsItemDelegate(this, 0, true, true, false));
    Delegate()->init();
    Delegate()->setFlippable(true);
    Delegate()->setRotatable(true);


    setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);

    setCacheMode(QGraphicsItem::DeviceCoordinateCache);
    setMaximumCacheSize(boundingRect().size().toSize() * UB_MAX_ZOOM);

    setData(UBGraphicsItemData::itemLayerType, QVariant(itemLayerType::ObjectItem)); //Necessary to set if we want z value to be assigned correctly

    setUuid(QUuid::createUuid());
}


UBGraphicsSvgItem::~UBGraphicsSvgItem()
{
}


QByteArray UBGraphicsSvgItem::fileData() const
{
    return mFileData;
}


QVariant UBGraphicsSvgItem::itemChange(GraphicsItemChange change, const QVariant &value)
{
    QVariant newValue = Delegate()->itemChange(change, value);
    return QGraphicsSvgItem::itemChange(change, newValue);
}


void UBGraphicsSvgItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
    if (Delegate()->mousePressEvent(event))
    {
        //NOOP
    }
    else
    {
        QGraphicsSvgItem::mousePressEvent(event);
    }
}


void UBGraphicsSvgItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
    if (Delegate()->mouseMoveEvent(event))
    {
        // NOOP;
    }
    else
    {
        QGraphicsSvgItem::mouseMoveEvent(event);
    }
}


void UBGraphicsSvgItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
    Delegate()->mouseReleaseEvent(event);
    QGraphicsSvgItem::mouseReleaseEvent(event);
}


void UBGraphicsSvgItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
    // Never draw the rubber band, we draw our custom selection with the DelegateFrame
    QStyleOptionGraphicsItem styleOption = QStyleOptionGraphicsItem(*option);
    styleOption.state &= ~QStyle::State_Selected;

    QGraphicsSvgItem::paint(painter, &styleOption, widget);
}


UBItem* UBGraphicsSvgItem::deepCopy() const
{
    UBGraphicsSvgItem* copy = new UBGraphicsSvgItem(this->fileData());

    copy->setUuid(this->uuid()); // this is OK for now as long as Widgets are imutable

    copyItemParameters(copy);

    // TODO UB 4.7... complete all members ?

    return copy;

}

void UBGraphicsSvgItem::copyItemParameters(UBItem *copy) const
{
    UBGraphicsSvgItem *cp = dynamic_cast<UBGraphicsSvgItem*>(copy);
    if (cp)
    {
        cp->setPos(this->pos());
        cp->setTransform(this->transform());
        cp->setFlag(QGraphicsItem::ItemIsMovable, true);
        cp->setFlag(QGraphicsItem::ItemIsSelectable, true);
        cp->setData(UBGraphicsItemData::ItemLayerType, this->data(UBGraphicsItemData::ItemLayerType));
        cp->setData(UBGraphicsItemData::ItemLocked, this->data(UBGraphicsItemData::ItemLocked));
        cp->setSourceUrl(this->sourceUrl());
    }
}

void UBGraphicsSvgItem::setRenderingQuality(RenderingQuality pRenderingQuality)
{
    UBItem::setRenderingQuality(pRenderingQuality);

    if (pRenderingQuality == RenderingQualityHigh)
    {
        setCacheMode(QGraphicsItem::NoCache);
    }
    else
    {
        setCacheMode(QGraphicsItem::DeviceCoordinateCache);
    }
}


UBGraphicsScene* UBGraphicsSvgItem::scene()
{
    return qobject_cast<UBGraphicsScene*>(QGraphicsItem::scene());
}



UBGraphicsPixmapItem* UBGraphicsSvgItem::toPixmapItem() const
{
    QImage image(renderer()->viewBox().size(), QImage::Format_ARGB32);
    QPainter painter(&image);
    renderer()->render(&painter);

    UBGraphicsPixmapItem *pixmapItem =  new UBGraphicsPixmapItem();
    pixmapItem->setPixmap(QPixmap::fromImage(image));

    pixmapItem->setPos(this->pos());
    pixmapItem->setTransform(this->transform());
    pixmapItem->setFlag(QGraphicsItem::ItemIsMovable, true);
    pixmapItem->setFlag(QGraphicsItem::ItemIsSelectable, true);
    pixmapItem->setData(UBGraphicsItemData::ItemLayerType, this->data(UBGraphicsItemData::ItemLayerType));

    return pixmapItem;
}

void UBGraphicsSvgItem::setUuid(const QUuid &pUuid)
{
    UBItem::setUuid(pUuid);
    setData(UBGraphicsItemData::ItemUuid, QVariant(pUuid)); //store item uuid inside the QGraphicsItem to fast operations with Items on the scene
}