Clean up docs for graphicsview.

* doc/snippets/graphicsview.cpp is moved from the qtdoc repo
* doc/images/graphicsview-parentchild.png is taken from 4.8

There are still some problems with references to examples, but
Casper meant that Jerome was working on that, so I'll leave
those fixes out.

Change-Id: Ieac8e6564344851fe8e77f2b346b152e57f8485c
Reviewed-by: Casper van Donderen <casper.vandonderen@nokia.com>

src/widgets/doc/snippets/graphicsview.cpp

@@ -0,0 +1,117 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [0]
+QGraphicsScene scene;
+QGraphicsRectItem *rect = scene.addRect(QRectF(0, 0, 100, 100));
+
+QGraphicsItem *item = scene.itemAt(50, 50);
+// item == rect
+//! [0]
+
+
+//! [1]
+QGraphicsScene scene;
+myPopulateScene(&scene);
+
+QGraphicsView view(&scene);
+view.show();
+//! [1]
+
+
+//! [2]
+class View : public QGraphicsView
+{
+Q_OBJECT
+    ...
+public slots:
+    void zoomIn() { scale(1.2, 1.2); }
+    void zoomOut() { scale(1 / 1.2, 1 / 1.2); }
+    void rotateLeft() { rotate(-10); }
+    void rotateRight() { rotate(10); }
+    ...
+};
+//! [2]
+
+
+//! [3]
+QGraphicsScene scene;
+scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green));
+
+QPrinter printer;
+if (QPrintDialog(&printer).exec() == QDialog::Accepted) {
+    QPainter painter(&printer);
+    painter.setRenderHint(QPainter::Antialiasing);
+    scene.render(&painter);
+}
+//! [3]
+
+
+//! [4]
+QGraphicsScene scene;
+scene.addRect(QRectF(0, 0, 100, 200), QPen(Qt::black), QBrush(Qt::green));
+
+QPixmap pixmap;
+QPainter painter(&pixmap);
+painter.setRenderHint(QPainter::Antialiasing);
+scene.render(&painter);
+painter.end();
+
+pixmap.save("scene.png");
+//! [4]
+
+
+//! [5]
+void CustomItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
+{
+    QMimeData *data = new QMimeData;
+    data->setColor(Qt::green);
+
+    QDrag *drag = new QDrag(event->widget());
+    drag->setMimeData(data);
+    drag->start();
+}
+//! [5]
+
+
+//! [6]
+QGraphicsView view(&scene);
+view.setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
+//! [6]

src/widgets/graphicsview/qgraphicsanchorlayout.cpp

@@ -81,7 +81,6 @@
     convenient to use the addAnchors() function. As with the other functions for specifying
     anchors, it can also be used to anchor a widget to a layout.
 
-    \clearfloat
     \section1 Size Hints and Size Policies in an Anchor Layout
 
     QGraphicsAnchorLayout respects each item's size hints and size policies.

src/widgets/graphicsview/qgraphicsitem.cpp

@@ -5056,6 +5056,7 @@ bool QGraphicsItem::isObscured(const QRectF &rect) const
 
 /*!
     \fn bool QGraphicsItem::isObscured(qreal x, qreal y, qreal w, qreal h) const
+    \overload
     \since 4.3
 
     This convenience function is equivalent to calling isObscured(QRectF(\a x, \a y, \a w, \a h)).
@@ -7792,7 +7793,7 @@ void QGraphicsItemPrivate::resetHeight()
 
   Describes the items x position.
 
-  \sa QGraphicsItem::setX(), setPos(), xChanged()
+  \sa QGraphicsItem::setX(), setPos()
 */
 
 /*!
@@ -7809,7 +7810,7 @@ void QGraphicsItemPrivate::resetHeight()
 
   Describes the items y position.
 
-  \sa QGraphicsItem::setY(), setPos(), yChanged()
+  \sa QGraphicsItem::setY(), setPos()
 */
 
 /*!
@@ -7826,7 +7827,7 @@ void QGraphicsItemPrivate::resetHeight()
 
   Describes the items z value.
 
-  \sa QGraphicsItem::setZValue(), zValue(), zChanged()
+  \sa QGraphicsItem::setZValue(), zValue()
 */
 
 /*!
@@ -7882,7 +7883,6 @@ void QGraphicsItemPrivate::resetHeight()
   By default, this property is true.
 
   \sa QGraphicsItem::isEnabled(), QGraphicsItem::setEnabled()
-  \sa QGraphicsObject::enabledChanged()
 */
 
 /*!
@@ -7901,7 +7901,7 @@ void QGraphicsItemPrivate::resetHeight()
 
   By default, this property is true.
 
-  \sa QGraphicsItem::isVisible(), QGraphicsItem::setVisible(), visibleChanged()
+  \sa QGraphicsItem::isVisible(), QGraphicsItem::setVisible()
 */
 
 /*!
@@ -10621,7 +10621,7 @@ QGraphicsSimpleTextItem::~QGraphicsSimpleTextItem()
 
 /*!
     Sets the item's text to \a text. The text will be displayed as
-    plain text. Newline characters ('\n') as well as characters of
+    plain text. Newline characters ('\\n') as well as characters of
     type QChar::LineSeparator will cause item to break the text into
     multiple lines.
 */

src/widgets/graphicsview/qgraphicsview.cpp

@@ -1294,7 +1294,7 @@ void QGraphicsView::setTransformationAnchor(ViewportAnchor anchor)
     whole scene fits in the view, QGraphicsScene uses the view \l alignment to
     position the scene in the view.
 
-    \sa alignment, transformationAnchor, Qt::WNorthWestGravity
+    \sa alignment, transformationAnchor
 */
 QGraphicsView::ViewportAnchor QGraphicsView::resizeAnchor() const
 {

src/widgets/graphicsview/qgraphicswidget.cpp

@@ -1201,7 +1201,8 @@ QVariant QGraphicsWidget::itemChange(GraphicsItemChange change, const QVariant &
 
     QGraphicsWidget delivers notifications for the following properties:
 
-    \table     \li propertyName        \li Property
+    \table
+    \header    \li propertyName        \li Property
     \row       \li layoutDirection     \li QGraphicsWidget::layoutDirection
     \row       \li size                \li QGraphicsWidget::size
     \row       \li font                \li QGraphicsWidget::font
@@ -1347,7 +1348,8 @@ Qt::WindowFrameSection QGraphicsWidget::windowFrameSectionAt(const QPointF &pos)
     Handles the \a event.  QGraphicsWidget handles the following
     events:
 
-    \table   \li Event                 \li Usage
+    \table
+    \header  \li Event                 \li Usage
     \row     \li Polish
                     \li Delivered to the widget some time after it has been
                         shown.