Long live Qt 4.5!

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diff --git a/src/svg/qgraphicssvgitem.cpp b/src/svg/qgraphicssvgitem.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtSvg module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#include "qgraphicssvgitem.h"
+
+#ifndef QT_NO_GRAPHICSSVGITEM
+
+#include "qpainter.h"
+#include "qstyleoption.h"
+#include "qsvgrenderer.h"
+#include "qdebug.h"
+
+#include "private/qobject_p.h"
+#include "private/qgraphicsitem_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QGraphicsSvgItemPrivate : public QObjectPrivate
+{
+public:
+    Q_DECLARE_PUBLIC(QGraphicsSvgItem)
+
+    QGraphicsSvgItemPrivate()
+        : renderer(0), shared(false)
+    {
+    }
+
+    void init()
+    {
+        Q_Q(QGraphicsSvgItem);
+        renderer = new QSvgRenderer(q);
+        QObject::connect(renderer, SIGNAL(repaintNeeded()),
+                         q, SLOT(_q_repaintItem()));
+        q->setCacheMode(QGraphicsItem::DeviceCoordinateCache);
+        q->setMaximumCacheSize(QSize(1024, 768));
+    }
+
+    void _q_repaintItem()
+    {
+        q_func()->update();
+    }
+
+    inline void updateDefaultSize()
+    {
+        QRectF bounds;
+        if (elemId.isEmpty()) {
+            bounds = QRectF(QPointF(0, 0), renderer->defaultSize());
+        } else {
+            bounds = renderer->boundsOnElement(elemId);
+        }
+        if (boundingRect.size() != bounds.size()) {
+            q_func()->prepareGeometryChange();
+            boundingRect.setSize(bounds.size());
+        }
+    }
+
+    QSvgRenderer *renderer;
+    QRectF boundingRect;
+    bool shared;
+    QString elemId;
+};
+
+/*!
+    \class QGraphicsSvgItem
+    \ingroup multimedia
+    \ingroup graphicsview-api
+    \brief The QGraphicsSvgItem class is a QGraphicsItem that can be used to render
+           the contents of SVG files.
+
+    \since 4.2
+
+    QGraphicsSvgItem provides a way of rendering SVG files onto QGraphicsView.
+    QGraphicsSvgItem can be created by passing the SVG file to be rendered to
+    its constructor or by explicit setting a shared QSvgRenderer on it.
+
+    Note that setting QSvgRenderer on a QGraphicsSvgItem doesn't make the item take
+    ownership of the renderer, therefore if using setSharedRenderer() method one has
+    to make sure that the lifetime of the QSvgRenderer object will be at least as long
+    as that of the QGraphicsSvgItem.
+
+    QGraphicsSvgItem provides a way of rendering only parts of the SVG files via
+    the setElementId. If setElementId() method is called, only the SVG element
+    (and its children) with the passed id will be renderer. This provides a convenient
+    way of selectively rendering large SVG files that contain a number of discrete
+    elements. For example the following code renders only jokers from a SVG file
+    containing a whole card deck:
+
+    \snippet doc/src/snippets/code/src_svg_qgraphicssvgitem.cpp 0
+
+    Size of the item can be set via the setSize() method or via
+    direct manipulation of the items transformation matrix.
+
+    By default the SVG rendering is cached using QGraphicsItem::DeviceCoordinateCache
+    mode to speedup the display of items. Caching can be disabled by passing
+    QGraphicsItem::NoCache to the QGraphicsItem::setCacheMode() method.
+
+    \sa QSvgWidget, {QtSvg Module}, QGraphicsItem, QGraphicsView
+*/
+
+/*!
+    Constructs a new SVG item with the given \a parent.
+*/
+QGraphicsSvgItem::QGraphicsSvgItem(QGraphicsItem *parent)
+    : QObject(*new QGraphicsSvgItemPrivate(), 0), QGraphicsItem(parent)
+{
+    Q_D(QGraphicsSvgItem);
+    d->init();
+}
+
+/*!
+    Constructs a new item with the given \a parent and loads the contents of the
+    SVG file with the specified \a fileName.
+*/
+QGraphicsSvgItem::QGraphicsSvgItem(const QString &fileName, QGraphicsItem *parent)
+    : QObject(*new QGraphicsSvgItemPrivate(), 0), QGraphicsItem(parent)
+{
+    Q_D(QGraphicsSvgItem);
+    d->init();
+    d->renderer->load(fileName);
+    d->updateDefaultSize();
+}
+
+/*!
+    Returns the currently use QSvgRenderer.
+*/
+QSvgRenderer *QGraphicsSvgItem::renderer() const
+{
+    return d_func()->renderer;
+}
+
+
+/*!
+    Returns the bounding rectangle of this item.
+*/
+QRectF QGraphicsSvgItem::boundingRect() const
+{
+    Q_D(const QGraphicsSvgItem);
+    return d->boundingRect;
+}
+
+/*!
+    \internal
+
+    Highlights \a item as selected.
+
+    NOTE: This function is a duplicate of qt_graphicsItem_highlightSelected() in qgraphicsitem.cpp!
+*/
+static void qt_graphicsItem_highlightSelected(
+    QGraphicsItem *item, QPainter *painter, const QStyleOptionGraphicsItem *option)
+{
+    const QRectF murect = painter->transform().mapRect(QRectF(0, 0, 1, 1));
+    if (qFuzzyCompare(qMax(murect.width(), murect.height()) + 1, 1))
+        return;
+
+    const QRectF mbrect = painter->transform().mapRect(item->boundingRect());
+    if (qMin(mbrect.width(), mbrect.height()) < qreal(1.0))
+        return;
+
+    qreal itemPenWidth;
+    switch (item->type()) {
+        case QGraphicsEllipseItem::Type:
+            itemPenWidth = static_cast<QGraphicsEllipseItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsPathItem::Type:
+            itemPenWidth = static_cast<QGraphicsPathItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsPolygonItem::Type:
+            itemPenWidth = static_cast<QGraphicsPolygonItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsRectItem::Type:
+            itemPenWidth = static_cast<QGraphicsRectItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsSimpleTextItem::Type:
+            itemPenWidth = static_cast<QGraphicsSimpleTextItem *>(item)->pen().widthF();
+            break;
+        case QGraphicsLineItem::Type:
+            itemPenWidth = static_cast<QGraphicsLineItem *>(item)->pen().widthF();
+            break;
+        default:
+            itemPenWidth = 1.0;
+    }
+    const qreal pad = itemPenWidth / 2;
+
+    const qreal penWidth = 0; // cosmetic pen
+
+    const QColor fgcolor = option->palette.windowText().color();
+    const QColor bgcolor( // ensure good contrast against fgcolor
+        fgcolor.red()   > 127 ? 0 : 255,
+        fgcolor.green() > 127 ? 0 : 255,
+        fgcolor.blue()  > 127 ? 0 : 255);
+
+    painter->setPen(QPen(bgcolor, penWidth, Qt::SolidLine));
+    painter->setBrush(Qt::NoBrush);
+    painter->drawRect(item->boundingRect().adjusted(pad, pad, -pad, -pad));
+
+    painter->setPen(QPen(option->palette.windowText(), 0, Qt::DashLine));
+    painter->setBrush(Qt::NoBrush);
+    painter->drawRect(item->boundingRect().adjusted(pad, pad, -pad, -pad));
+}
+
+/*!
+    \reimp
+*/
+void QGraphicsSvgItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+                             QWidget *widget)
+{
+//    Q_UNUSED(option);
+    Q_UNUSED(widget);
+
+    Q_D(QGraphicsSvgItem);
+    if (!d->renderer->isValid())
+        return;
+
+    if (d->elemId.isEmpty())
+        d->renderer->render(painter, d->boundingRect);
+    else
+        d->renderer->render(painter, d->elemId, d->boundingRect);
+
+    if (option->state & QStyle::State_Selected)
+        qt_graphicsItem_highlightSelected(this, painter, option);
+}
+
+/*!
+    \reimp
+*/
+int QGraphicsSvgItem::type() const
+{
+    return Type;
+}
+
+
+/*!
+    Sets the maximum device coordinate cache size of the item to \a size.
+    If the item is cached using QGraphicsItem::DeviceCoordinateCache mode,
+    caching is bypassed if the extension of the item in device coordinates
+    is larger than \a size.
+
+    The cache corresponds to the QPixmap which is used to cache the
+    results of the rendering.
+    Use QPixmapCache::setCacheLimit() to set limitations on the whole cache
+    and use setMaximumCacheSize() when setting cache size for individual
+    items.
+
+    \sa QGraphicsItem::cacheMode()
+*/
+void QGraphicsSvgItem::setMaximumCacheSize(const QSize &size)
+{
+    QGraphicsItem::d_ptr->setExtra(QGraphicsItemPrivate::ExtraMaxDeviceCoordCacheSize, size);
+    update();
+}
+
+/*!
+    Returns the current maximum size of the device coordinate cache for this item.
+    If the item is cached using QGraphicsItem::DeviceCoordinateCache mode,
+    caching is bypassed if the extension of the item in device coordinates
+    is larger than the maximum size.
+
+    The default maximum cache size is 1024x768.
+    QPixmapCache::cacheLimit() gives the
+    cumulative bounds of the whole cache, whereas maximumCacheSize() refers
+    to a maximum cache size for this particular item.
+
+    \sa QGraphicsItem::cacheMode()
+*/
+QSize QGraphicsSvgItem::maximumCacheSize() const
+{
+    return QGraphicsItem::d_ptr->extra(QGraphicsItemPrivate::ExtraMaxDeviceCoordCacheSize).toSize();
+}
+
+/*!
+    Sets the XML ID of the element that this item should render to \a
+    id.
+*/
+void QGraphicsSvgItem::setElementId(const QString &id)
+{
+    Q_D(QGraphicsSvgItem);
+    d->elemId = id;
+    d->updateDefaultSize();
+    update();
+}
+
+/*!
+    Returns the XML ID the element that is currently
+    being renderer. Returns an empty string if the whole
+    file is being rendered.
+*/
+QString QGraphicsSvgItem::elementId() const
+{
+    Q_D(const QGraphicsSvgItem);
+    return d->elemId;
+}
+
+/*!
+    Sets \a renderer to be a shared QSvgRenderer on the item. By
+    using this method one can share the same QSvgRenderer on a number
+    of items. This means that the SVG file will be parsed only once.
+    QSvgRenderer passed to this method has to exist for as long as
+    this item is used.
+*/
+void QGraphicsSvgItem::setSharedRenderer(QSvgRenderer *renderer)
+{
+    Q_D(QGraphicsSvgItem);
+    if (!d->shared)
+        delete d->renderer;
+
+    d->renderer = renderer;
+    d->shared = true;
+
+    d->updateDefaultSize();
+
+    update();
+}
+
+/*!
+    \obsolete
+
+    Use QGraphicsItem::setCacheMode() instead. Passing true to this function is equivalent
+    to QGraphicsItem::setCacheMode(QGraphicsItem::DeviceCoordinateCache).
+*/
+void QGraphicsSvgItem::setCachingEnabled(bool caching)
+{
+    setCacheMode(caching ? QGraphicsItem::DeviceCoordinateCache : QGraphicsItem::NoCache);
+}
+
+/*!
+    \obsolete
+
+    Use QGraphicsItem::cacheMode() instead.
+*/
+bool QGraphicsSvgItem::isCachingEnabled() const
+{
+    return cacheMode() != QGraphicsItem::NoCache;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qgraphicssvgitem.cpp"
+
+#endif // QT_NO_GRAPHICSSVGITEM