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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 2085 insertions, 0 deletions

diff --git a/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
new file mode 100644
index 0000000000..e7c63d540e
--- /dev/null
+++ b/tests/auto/qgraphicsanchorlayout/tst_qgraphicsanchorlayout.cpp
@@ -0,0 +1,2085 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the test suite 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+#include <QtGui/qgraphicsanchorlayout.h>
+#include <private/qgraphicsanchorlayout_p.h>
+#include <QtGui/qgraphicswidget.h>
+#include <QtGui/qgraphicsproxywidget.h>
+#include <QtGui/qgraphicsview.h>
+#include <QtGui/qwindowsstyle.h>
+
+class tst_QGraphicsAnchorLayout : public QObject {
+    Q_OBJECT
+
+public:
+    tst_QGraphicsAnchorLayout() : QObject() {
+        hasSimplification = qgetenv("QT_ANCHORLAYOUT_NO_SIMPLIFICATION").isEmpty();
+    }
+
+private:
+    bool hasSimplification;
+
+private slots:
+    void simple();
+    void simple_center();
+    void simple_semifloat();
+    void layoutDirection();
+    void diagonal();
+    void parallel();
+    void parallel2();
+    void snake();
+    void snakeOppositeDirections();
+    void fairDistribution();
+    void fairDistributionOppositeDirections();
+    void proportionalPreferred();
+    void example();
+    void setSpacing();
+    void styleDefaults();
+    void hardComplexS60();
+    void stability();
+    void delete_anchor();
+    void conflicts();
+    void sizePolicy();
+    void floatConflict();
+    void infiniteMaxSizes();
+    void simplifiableUnfeasible();
+    void simplificationVsOrder();
+    void parallelSimplificationOfCenter();
+    void simplificationVsRedundance();
+    void spacingPersistency();
+    void snakeParallelWithLayout();
+    void parallelToHalfLayout();
+    void globalSpacing();
+    void graphicsAnchorHandling();
+    void invalidHierarchyCheck();
+};
+
+class RectWidget : public QGraphicsWidget
+{
+public:
+    RectWidget(QGraphicsItem *parent = 0) : QGraphicsWidget(parent){}
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+    {
+        Q_UNUSED(option);
+        Q_UNUSED(widget);
+        painter->drawRoundRect(rect());
+        painter->drawLine(rect().topLeft(), rect().bottomRight());
+        painter->drawLine(rect().bottomLeft(), rect().topRight());
+    }
+};
+
+static QGraphicsWidget *createItem(const QSizeF &minimum = QSizeF(100.0, 100.0),
+                                   const QSizeF &preferred = QSize(150.0, 100.0),
+                                   const QSizeF &maximum = QSizeF(200.0, 100.0),
+                                   const QString &name = QString())
+{
+    QGraphicsWidget *w = new RectWidget;
+    w->setMinimumSize(minimum);
+    w->setPreferredSize(preferred);
+    w->setMaximumSize(maximum);
+    w->setData(0, name);
+    return w;
+}
+
+static void setAnchor(QGraphicsAnchorLayout *l,
+                      QGraphicsLayoutItem *firstItem,
+                      Qt::AnchorPoint firstEdge,
+                      QGraphicsLayoutItem *secondItem,
+                      Qt::AnchorPoint secondEdge,
+                      qreal spacing = 0)
+{
+    QGraphicsAnchor *anchor = l->addAnchor(firstItem, firstEdge, secondItem, secondEdge);
+    anchor->setSpacing(spacing);
+}
+
+static bool checkReverseDirection(QGraphicsWidget *w)
+{
+    QGraphicsLayout *l = w->layout();
+    Q_ASSERT(l);
+    qreal left, top, right, bottom;
+    l->getContentsMargins(&left, &top, &right, &bottom);
+    w->setLayoutDirection(Qt::LeftToRight);
+    QApplication::processEvents();
+    const QRectF lg = l->geometry();
+    QMap<QGraphicsLayoutItem *, QRectF> geometries;
+    for (int i = 0; i < l->count(); ++i) {
+        QGraphicsLayoutItem *w = l->itemAt(i);
+        geometries.insert(w, w->geometry());
+    }
+    w->setLayoutDirection(Qt::RightToLeft);
+    QApplication::processEvents();
+    lg.adjusted(+right, +top, -left, -bottom);
+    for (int i = 0; i < l->count(); ++i) {
+        QGraphicsLayoutItem *w = l->itemAt(i);
+        const QRectF rtlGeom = w->geometry();
+        const QRectF ltrGeom = geometries.value(w);
+        QRectF expectedGeom = ltrGeom;
+        expectedGeom.moveRight(lg.right() - (0 + ltrGeom.left()));
+        if (expectedGeom != rtlGeom) {
+            qDebug() << "layout->geometry():" << lg
+                     << "expected:" << expectedGeom
+                     << "actual:" << rtlGeom;
+            return false;
+        }
+    }
+    return true;
+}
+
+static bool layoutHasConflict(QGraphicsAnchorLayout *l)
+{
+    return QGraphicsAnchorLayoutPrivate::get(l)->hasConflicts();
+}
+
+static bool usedSimplex(QGraphicsAnchorLayout *l, Qt::Orientation o)
+{
+    QGraphicsAnchorLayoutPrivate::Orientation oo = (o == Qt::Horizontal) ?
+        QGraphicsAnchorLayoutPrivate::Horizontal :
+        QGraphicsAnchorLayoutPrivate::Vertical;
+
+    return QGraphicsAnchorLayoutPrivate::get(l)->lastCalculationUsedSimplex[oo];
+}
+
+void tst_QGraphicsAnchorLayout::simple()
+{
+    QGraphicsWidget *w1 = createItem();
+    QGraphicsWidget *w2 = createItem();
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+
+    // Horizontal
+    l->addAnchor(l, Qt::AnchorLeft, w1, Qt::AnchorLeft);
+    l->addAnchor(w1, Qt::AnchorRight, w2, Qt::AnchorLeft);
+    l->addAnchor(w2, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    // Vertical
+    l->addAnchors(l, w1, Qt::Vertical);
+    l->addAnchors(l, w2, Qt::Vertical);
+
+    QCOMPARE(l->count(), 2);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+    p.adjustSize();
+
+    if (hasSimplification) {
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+}
+
+void tst_QGraphicsAnchorLayout::simple_center()
+{
+    QSizeF min(10, 10);
+    QSizeF pref(50, 10);
+    QSizeF max(100, 10);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "a");
+    QGraphicsWidget *b = createItem(min, pref, max, "b");
+    QGraphicsWidget *c = createItem(min, pref, max, "c");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    // horizontal
+    setAnchor(l, l, Qt::AnchorLeft, a, Qt::AnchorLeft, 0);
+    setAnchor(l, a, Qt::AnchorRight, b, Qt::AnchorLeft, 0);
+    setAnchor(l, b, Qt::AnchorRight, l, Qt::AnchorRight, 0);
+    setAnchor(l, a, Qt::AnchorHorizontalCenter, c, Qt::AnchorLeft, 0);
+    setAnchor(l, c, Qt::AnchorRight, b, Qt::AnchorHorizontalCenter, 0);
+
+    // vertical
+    setAnchor(l, l, Qt::AnchorTop, a, Qt::AnchorTop, 0);
+    setAnchor(l, l, Qt::AnchorTop, b, Qt::AnchorTop, 0);
+    setAnchor(l, a, Qt::AnchorBottom, c, Qt::AnchorTop, 0);
+    setAnchor(l, b, Qt::AnchorBottom, c, Qt::AnchorTop, 0);
+    setAnchor(l, c, Qt::AnchorBottom, l, Qt::AnchorBottom, 0);
+
+    QCOMPARE(l->count(), 3);
+
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+    p->setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QCOMPARE(layoutMinimumSize, QSizeF(20, 20));
+
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QCOMPARE(layoutMaximumSize, QSizeF(200, 20));
+
+    if (hasSimplification) {
+        QVERIFY(usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+
+    delete p;
+}
+
+void tst_QGraphicsAnchorLayout::simple_semifloat()
+{
+    // Useful for testing simplification between A_left and B_left.
+    // Unfortunately the only way to really test that now is to manually inspect the
+    // simplified graph.
+    QSizeF min(10, 10);
+    QSizeF pref(50, 10);
+    QSizeF max(100, 10);
+
+    QGraphicsWidget *A = createItem(min, pref, max, "A");
+    QGraphicsWidget *B = createItem(min, pref, max, "B");
+    QGraphicsWidget *a = createItem(min, pref, max, "a");
+    QGraphicsWidget *b = createItem(min, pref, max, "b");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+
+    // horizontal
+    setAnchor(l, l, Qt::AnchorLeft, A, Qt::AnchorLeft, 0);
+    setAnchor(l, A, Qt::AnchorRight, B, Qt::AnchorLeft, 0);
+    setAnchor(l, B, Qt::AnchorRight, l, Qt::AnchorRight, 0);
+
+    setAnchor(l, A, Qt::AnchorLeft, a, Qt::AnchorLeft, 0);
+    setAnchor(l, B, Qt::AnchorLeft, b, Qt::AnchorLeft, 0);
+
+    // vertical
+    setAnchor(l, l, Qt::AnchorTop, A, Qt::AnchorTop, 0);
+    setAnchor(l, l, Qt::AnchorTop, B, Qt::AnchorTop, 0);
+    setAnchor(l, A, Qt::AnchorBottom, a, Qt::AnchorTop, 0);
+    setAnchor(l, B, Qt::AnchorBottom, b, Qt::AnchorTop, 0);
+    setAnchor(l, a, Qt::AnchorBottom, l, Qt::AnchorBottom, 0);
+    setAnchor(l, b, Qt::AnchorBottom, l, Qt::AnchorBottom, 0);
+
+    QCOMPARE(l->count(), 4);
+
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+    p->setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QCOMPARE(layoutMinimumSize, QSizeF(20, 20));
+
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(100, 20));
+
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QCOMPARE(layoutMaximumSize, QSizeF(200, 20));
+
+    delete p;
+}
+
+void tst_QGraphicsAnchorLayout::layoutDirection()
+{
+    QSizeF min(10, 10);
+    QSizeF pref(50, 10);
+    QSizeF max(100, 10);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "a");
+    QGraphicsWidget *b = createItem(min, pref, max, "b");
+    QGraphicsWidget *c = createItem(min, pref, QSizeF(100, 20), "c");
+
+    a->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+    b->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+    c->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 5, 10, 15);
+    // horizontal
+    setAnchor(l, l, Qt::AnchorLeft, a, Qt::AnchorLeft, 0);
+    setAnchor(l, a, Qt::AnchorRight, b, Qt::AnchorLeft, 0);
+    setAnchor(l, b, Qt::AnchorRight, l, Qt::AnchorRight, 0);
+    setAnchor(l, a, Qt::AnchorHorizontalCenter, c, Qt::AnchorLeft, 0);
+    setAnchor(l, c, Qt::AnchorRight, b, Qt::AnchorHorizontalCenter, 0);
+
+    // vertical
+    setAnchor(l, l, Qt::AnchorTop, a, Qt::AnchorTop, 0);
+    setAnchor(l, l, Qt::AnchorTop, b, Qt::AnchorTop, 0);
+    setAnchor(l, a, Qt::AnchorBottom, c, Qt::AnchorTop, 0);
+    setAnchor(l, b, Qt::AnchorBottom, c, Qt::AnchorTop, 0);
+    setAnchor(l, c, Qt::AnchorBottom, l, Qt::AnchorBottom, 0);
+
+    QCOMPARE(l->count(), 3);
+
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+    p->setLayoutDirection(Qt::LeftToRight);
+    p->setLayout(l);
+
+    QGraphicsScene scene;
+    QGraphicsView *view = new QGraphicsView(&scene);
+    scene.addItem(p);
+    p->show();
+    view->show();
+
+    QCOMPARE(checkReverseDirection(p), true);
+
+    if (hasSimplification) {
+        QVERIFY(usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+
+    delete p;
+    delete view;
+}
+
+void tst_QGraphicsAnchorLayout::diagonal()
+{
+    QSizeF min(10, 100);
+    QSizeF pref(70, 100);
+    QSizeF max(100, 100);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "A");
+    QGraphicsWidget *b = createItem(min, pref, max, "B");
+    QGraphicsWidget *c = createItem(min, pref, max, "C");
+    QGraphicsWidget *d = createItem(min, pref, max, "D");
+    QGraphicsWidget *e = createItem(min, pref, max, "E");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    // vertical
+    l->addAnchor(a, Qt::AnchorTop, l, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorTop, l, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorTop, a, Qt::AnchorBottom);
+    l->addAnchor(c, Qt::AnchorTop, b, Qt::AnchorBottom);
+    l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, e, Qt::AnchorTop);
+    l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom);
+    l->addAnchor(e, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    // horizontal
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(l, Qt::AnchorLeft, d, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+
+    l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, e, Qt::AnchorLeft);
+
+    l->addAnchor(b, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(e, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(d, Qt::AnchorRight, e, Qt::AnchorLeft);
+
+    QCOMPARE(l->count(), 5);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(30.0, 300.0));
+    QCOMPARE(layoutPreferredSize, QSizeF(170.0, 300.0));
+    QCOMPARE(layoutMaximumSize, QSizeF(190.0, 300.0));
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 10.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(10.0, 0.0, 20.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(10.0, 100.0, 10.0, 100.0));
+    QCOMPARE(d->geometry(), QRectF(0.0, 200.0, 20.0, 100.0));
+    QCOMPARE(e->geometry(), QRectF(20.0, 200.0, 10.0, 100.0));
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 70.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(70.0, 0.0, 100.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(70.0, 100.0, 30.0, 100.0));
+    QCOMPARE(d->geometry(), QRectF(0.0, 200.0, 100.0, 100.0));
+    QCOMPARE(e->geometry(), QRectF(100.0, 200.0, 70.0, 100.0));
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 90.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(90.0, 0.0, 100.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(90.0, 100.0, 10.0, 100.0));
+    QCOMPARE(d->geometry(), QRectF(0.0, 200.0, 100.0, 100.0));
+    QCOMPARE(e->geometry(), QRectF(100.0, 200.0, 90.0, 100.0));
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    QSizeF testA(175.0, 300.0);
+    p.resize(testA);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 75.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(75.0, 0.0, 100.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(75.0, 100.0, 25.0, 100.0));
+    QCOMPARE(d->geometry(), QRectF(0.0, 200.0, 100.0, 100.0));
+    QCOMPARE(e->geometry(), QRectF(100.0, 200.0, 75.0, 100.0));
+    QCOMPARE(p.size(), testA);
+
+    if (hasSimplification) {
+        QVERIFY(usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+
+    QCOMPARE(checkReverseDirection(&p), true);
+
+    c->setMinimumWidth(300);
+    QVERIFY(layoutHasConflict(l));
+}
+
+void tst_QGraphicsAnchorLayout::parallel()
+{
+    QGraphicsWidget *a = createItem(QSizeF(100, 100),
+                                    QSizeF(150, 100),
+                                    QSizeF(200, 100), "A");
+
+    QGraphicsWidget *b = createItem(QSizeF(100, 100),
+                                    QSizeF(150, 100),
+                                    QSizeF(300, 100), "B");
+
+    QGraphicsWidget *c = createItem(QSizeF(100, 100),
+                                    QSizeF(200, 100),
+                                    QSizeF(350, 100), "C");
+
+    QGraphicsWidget *d = createItem(QSizeF(100, 100),
+                                    QSizeF(170, 100),
+                                    QSizeF(200, 100), "D");
+
+    QGraphicsWidget *e = createItem(QSizeF(150, 100),
+                                    QSizeF(150, 100),
+                                    QSizeF(200, 100), "E");
+
+    QGraphicsWidget *f = createItem(QSizeF(100, 100),
+                                    QSizeF(150, 100),
+                                    QSizeF(200, 100), "F");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
+    l->addAnchor(d, Qt::AnchorBottom, e, Qt::AnchorTop);
+    l->addAnchor(e, Qt::AnchorBottom, f, Qt::AnchorTop);
+    l->addAnchor(f, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorRight, d, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorRight, e, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, f, Qt::AnchorLeft);
+    l->addAnchor(d, Qt::AnchorRight, f, Qt::AnchorLeft);
+    l->addAnchor(e, Qt::AnchorRight, f, Qt::AnchorLeft);
+    l->addAnchor(f, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 6);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(450, 600));
+    QCOMPARE(layoutPreferredSize, QSizeF(620, 600));
+    QCOMPARE(layoutMaximumSize, QSizeF(750, 600));
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(a->geometry(), QRectF(0, 0, 100, 100));
+    QCOMPARE(b->geometry(), QRectF(100, 100, 100, 100));
+    QCOMPARE(c->geometry(), QRectF(100, 200, 250, 100));
+    QCOMPARE(d->geometry(), QRectF(200, 300, 150, 100));
+    QCOMPARE(e->geometry(), QRectF(200, 400, 150, 100));
+    QCOMPARE(f->geometry(), QRectF(350, 500, 100, 100));
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    if (!hasSimplification)
+        return;
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(a->geometry(), QRectF(0, 0, 150, 100));
+    QCOMPARE(b->geometry(), QRectF(150, 100, 150, 100));
+    QCOMPARE(c->geometry(), QRectF(150, 200, 320, 100));
+    QCOMPARE(d->geometry(), QRectF(300, 300, 170, 100));
+    QCOMPARE(e->geometry(), QRectF(300, 400, 170, 100));
+    QCOMPARE(f->geometry(), QRectF(470, 500, 150, 100));
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    // Maximum size depends on simplification / fair distribution
+    // Without that, test may or may not pass, depending on the
+    // solution found by the solver at runtime.
+    p.resize(layoutMaximumSize);
+    QCOMPARE(a->geometry(), QRectF(0, 0, 200, 100));
+    QCOMPARE(b->geometry(), QRectF(200, 100, 175, 100));
+    QCOMPARE(c->geometry(), QRectF(200, 200, 350, 100));
+    QCOMPARE(d->geometry(), QRectF(375, 300, 175, 100));
+    QCOMPARE(e->geometry(), QRectF(375, 400, 175, 100));
+    QCOMPARE(f->geometry(), QRectF(550, 500, 200, 100));
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    QVERIFY(!usedSimplex(l, Qt::Horizontal));
+    QVERIFY(!usedSimplex(l, Qt::Vertical));
+}
+
+void tst_QGraphicsAnchorLayout::parallel2()
+{
+    QGraphicsWidget *a = createItem(QSizeF(70.0, 100.0),
+                                    QSizeF(100.0, 100.0),
+                                    QSizeF(200.0, 100.0), "A");
+
+    QGraphicsWidget *b = createItem(QSizeF(100.0, 100.0),
+                                    QSizeF(150.0, 100.0),
+                                    QSizeF(190.0, 100.0), "B");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchors(l, a, Qt::Horizontal);
+    l->addAnchor(l, Qt::AnchorLeft, b, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorRight, a, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 2);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(100.0, 200.0));
+    QCOMPARE(layoutPreferredSize, QSizeF(150.0, 200.0));
+    QCOMPARE(layoutMaximumSize, QSizeF(190.0, 200.0));
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    if (hasSimplification) {
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+}
+
+void tst_QGraphicsAnchorLayout::snake()
+{
+    QGraphicsWidget *a = createItem(QSizeF(50.0, 100.0),
+                                    QSizeF(70.0, 100.0),
+                                    QSizeF(100.0, 100.0), "A");
+
+    QGraphicsWidget *b = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(20.0, 100.0),
+                                    QSizeF(40.0, 100.0), "B");
+
+    QGraphicsWidget *c = createItem(QSizeF(50.0, 100.0),
+                                    QSizeF(70.0, 100.0),
+                                    QSizeF(100.0, 100.0), "C");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorRight);
+    l->addAnchor(b, Qt::AnchorLeft, c, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 3);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(60.0, 300.0));
+    QCOMPARE(layoutPreferredSize, QSizeF(120.0, 300.0));
+    QCOMPARE(layoutMaximumSize, QSizeF(190.0, 300.0));
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 50.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(10.0, 100.0, 40.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(10.0, 200.0, 50.0, 100.0));
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 70.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(50.0, 100.0, 20.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(50.0, 200.0, 70.0, 100.0));
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 100.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(90.0, 100.0, 10.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(90.0, 200.0, 100.0, 100.0));
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    QVERIFY(layoutHasConflict(l) == false);
+
+    // Test QSizePolicy::ExpandFlag, it shouldn't change the extreme
+    // points of the layout...
+    b->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
+
+    QSizeF newLayoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF newLayoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QSizeF newLayoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(layoutMinimumSize, newLayoutMinimumSize);
+    QCOMPARE(layoutMaximumSize, newLayoutMaximumSize);
+    QCOMPARE(layoutPreferredSize, newLayoutPreferredSize);
+}
+
+void tst_QGraphicsAnchorLayout::snakeOppositeDirections()
+{
+    QGraphicsWidget *a = createItem(QSizeF(50.0, 100.0),
+                                    QSizeF(70.0, 100.0),
+                                    QSizeF(100.0, 100.0), "A");
+
+    QGraphicsWidget *b = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(20.0, 100.0),
+                                    QSizeF(40.0, 100.0), "B");
+
+    QGraphicsWidget *c = createItem(QSizeF(50.0, 100.0),
+                                    QSizeF(70.0, 100.0),
+                                    QSizeF(100.0, 100.0), "C");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+
+    // Both a and c are 'pointing' to b
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorRight);
+    l->addAnchor(c, Qt::AnchorLeft, b, Qt::AnchorLeft);
+
+    l->addAnchor(c, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 3);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(60.0, 300.0));
+    QCOMPARE(layoutPreferredSize, QSizeF(120.0, 300.0));
+    QCOMPARE(layoutMaximumSize, QSizeF(190.0, 300.0));
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 50.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(10.0, 100.0, 40.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(10.0, 200.0, 50.0, 100.0));
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 70.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(50.0, 100.0, 20.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(50.0, 200.0, 70.0, 100.0));
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 100.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(90.0, 100.0, 10.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(90.0, 200.0, 100.0, 100.0));
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    QCOMPARE(checkReverseDirection(&p), true);
+}
+
+void tst_QGraphicsAnchorLayout::fairDistribution()
+{
+    QGraphicsWidget *a = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(50.0, 100.0),
+                                    QSizeF(100.0, 100.0), "A");
+
+    QGraphicsWidget *b = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(50.0, 100.0),
+                                    QSizeF(100.0, 100.0), "B");
+
+    QGraphicsWidget *c = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(50.0, 100.0),
+                                    QSizeF(100.0, 100.0), "C");
+
+    QGraphicsWidget *d = createItem(QSizeF(60.0, 100.0),
+                                    QSizeF(165.0, 100.0),
+                                    QSizeF(600.0, 100.0), "D");
+
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
+    l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorRight, c, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(l, Qt::AnchorLeft, d, Qt::AnchorLeft);
+    l->addAnchor(d, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 4);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(60.0, 400.0));
+    QCOMPARE(layoutPreferredSize, QSizeF(165.0, 400.0));
+    QCOMPARE(layoutMaximumSize, QSizeF(300.0, 400.0));
+
+    p.resize(layoutMinimumSize);
+    if (!hasSimplification)
+        QEXPECT_FAIL("", "Without simplification there is no fair distribution.", Abort);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 20.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(20.0, 100.0, 20.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(40.0, 200.0, 20.0, 100.0));
+    QCOMPARE(d->geometry(), QRectF(0.0, 300.0, 60.0, 100.0));
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 55.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(55.0, 100.0, 55.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(110.0, 200.0, 55.0, 100.0));
+    QCOMPARE(d->geometry(), QRectF(0.0, 300.0, 165.0, 100.0));
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(a->geometry(), QRectF(0.0, 0.0, 100.0, 100.0));
+    QCOMPARE(b->geometry(), QRectF(100.0, 100.0, 100.0, 100.0));
+    QCOMPARE(c->geometry(), QRectF(200.0, 200.0, 100.0, 100.0));
+    QCOMPARE(d->geometry(), QRectF(0.0, 300.0, 300.0, 100.0));
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    if (hasSimplification) {
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+}
+
+void tst_QGraphicsAnchorLayout::fairDistributionOppositeDirections()
+{
+    QGraphicsWidget *a = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(50.0, 100.0),
+                                    QSizeF(100.0, 100.0), "A");
+
+    QGraphicsWidget *b = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(50.0, 100.0),
+                                    QSizeF(100.0, 100.0), "B");
+
+    QGraphicsWidget *c = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(50.0, 100.0),
+                                    QSizeF(100.0, 100.0), "C");
+
+    QGraphicsWidget *d = createItem(QSizeF(10.0, 100.0),
+                                    QSizeF(50.0, 100.0),
+                                    QSizeF(100.0, 100.0), "D");
+
+    QGraphicsWidget *e = createItem(QSizeF(60.0, 100.0),
+                                    QSizeF(220.0, 100.0),
+                                    QSizeF(600.0, 100.0), "E");
+
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
+    l->addAnchor(d, Qt::AnchorBottom, e, Qt::AnchorTop);
+    l->addAnchor(e, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(a, Qt::AnchorLeft, l, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorLeft, a, Qt::AnchorRight);
+    l->addAnchor(c, Qt::AnchorLeft, b, Qt::AnchorRight);
+    l->addAnchor(d, Qt::AnchorLeft, c, Qt::AnchorRight);
+    l->addAnchor(d, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchors(l, e, Qt::Horizontal);
+
+    QCOMPARE(l->count(), 5);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(60.0, 500.0));
+    QCOMPARE(layoutPreferredSize, QSizeF(220.0, 500.0));
+    QCOMPARE(layoutMaximumSize, QSizeF(400.0, 500.0));
+
+    if (!hasSimplification)
+        return;
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(a->size(), b->size());
+    QCOMPARE(a->size(), c->size());
+    QCOMPARE(a->size(), d->size());
+    QCOMPARE(e->size().width(), 4 * a->size().width());
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(a->size(), b->size());
+    QCOMPARE(a->size(), c->size());
+    QCOMPARE(a->size(), d->size());
+    QCOMPARE(e->size().width(), 4 * a->size().width());
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(a->size(), b->size());
+    QCOMPARE(a->size(), c->size());
+    QCOMPARE(a->size(), d->size());
+    QCOMPARE(e->size().width(), 4 * a->size().width());
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    QVERIFY(!usedSimplex(l, Qt::Horizontal));
+    QVERIFY(!usedSimplex(l, Qt::Vertical));
+}
+
+void tst_QGraphicsAnchorLayout::proportionalPreferred()
+{
+    QSizeF min(0, 100);
+
+    QGraphicsWidget *a = createItem(min, QSizeF(10, 100), QSizeF(20, 100), "A");
+    QGraphicsWidget *b = createItem(min, QSizeF(20, 100), QSizeF(30, 100), "B");
+    QGraphicsWidget *c = createItem(min, QSizeF(14, 100), QSizeF(20, 100), "C");
+    QGraphicsWidget *d = createItem(min, QSizeF(10, 100), QSizeF(20, 100), "D");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
+    l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(l, Qt::AnchorLeft, b, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, d, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(c, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(d, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 4);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(0, 400));
+    QCOMPARE(layoutPreferredSize, QSizeF(24, 400));
+    QCOMPARE(layoutMaximumSize, QSizeF(30, 400));
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(p.size(), layoutMinimumSize);
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(c->size().width(), d->size().width());
+    QCOMPARE(p.size(), layoutPreferredSize);
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(p.size(), layoutMaximumSize);
+
+    p.resize(QSizeF(12, 400));
+
+    // Proportionality between size given and preferred size, this
+    // should be respected in this graph for (a) and (b)|(c).
+    qreal factor = 12.0 / 24.0;
+
+    QCOMPARE(c->size().width(), d->size().width());
+    QCOMPARE(a->size().width(), 10 * factor);
+    QCOMPARE(c->size().width(), 14 * factor);
+    QCOMPARE(p.size(), QSizeF(12, 400));
+
+    if (hasSimplification) {
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+}
+
+void tst_QGraphicsAnchorLayout::example()
+{
+    QSizeF min(30, 100);
+    QSizeF pref(210, 100);
+    QSizeF max(300, 100);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "A");
+    QGraphicsWidget *b = createItem(min, pref, max, "B");
+    QGraphicsWidget *c = createItem(min, pref, max, "C");
+    QGraphicsWidget *d = createItem(min, pref, max, "D");
+    QGraphicsWidget *e = createItem(min, pref, max, "E");
+    QGraphicsWidget *f = createItem(QSizeF(30, 50), QSizeF(150, 50), max, "F");
+    QGraphicsWidget *g = createItem(QSizeF(30, 50), QSizeF(30, 100), max, "G");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    // vertical
+    l->addAnchor(a, Qt::AnchorTop, l, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorTop, l, Qt::AnchorTop);
+
+    l->addAnchor(c, Qt::AnchorTop, a, Qt::AnchorBottom);
+    l->addAnchor(c, Qt::AnchorTop, b, Qt::AnchorBottom);
+    l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, e, Qt::AnchorTop);
+
+    l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom);
+    l->addAnchor(e, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchor(c, Qt::AnchorTop, f, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorVerticalCenter, f, Qt::AnchorBottom);
+    l->addAnchor(f, Qt::AnchorBottom, g, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, g, Qt::AnchorBottom);
+
+    // horizontal
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(l, Qt::AnchorLeft, d, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+
+    l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, e, Qt::AnchorLeft);
+
+    l->addAnchor(b, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(e, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(d, Qt::AnchorRight, e, Qt::AnchorLeft);
+
+    l->addAnchor(l, Qt::AnchorLeft, f, Qt::AnchorLeft);
+    l->addAnchor(l, Qt::AnchorLeft, g, Qt::AnchorLeft);
+    l->addAnchor(f, Qt::AnchorRight, g, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 7);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(layoutMinimumSize, QSizeF(90.0, 300.0));
+    QCOMPARE(layoutPreferredSize, QSizeF(510.0, 300.0));
+    QCOMPARE(layoutMaximumSize, QSizeF(570.0, 300.0));
+
+    p.resize(layoutMinimumSize);
+    QCOMPARE(p.size(), layoutMinimumSize);
+    QCOMPARE(a->size(), e->size());
+    QCOMPARE(b->size(), d->size());
+    QCOMPARE(f->size(), g->size());
+
+    p.resize(layoutPreferredSize);
+    QCOMPARE(p.size(), layoutPreferredSize);
+    QCOMPARE(a->size(), e->size());
+    QCOMPARE(b->size(), d->size());
+    QCOMPARE(f->size(), g->size());
+
+    p.resize(layoutMaximumSize);
+    QCOMPARE(p.size(), layoutMaximumSize);
+    QCOMPARE(a->size(), e->size());
+    QCOMPARE(b->size(), d->size());
+    QCOMPARE(f->size(), g->size());
+
+    if (hasSimplification) {
+        QVERIFY(usedSimplex(l, Qt::Horizontal));
+        QVERIFY(usedSimplex(l, Qt::Vertical));
+    }
+}
+
+void tst_QGraphicsAnchorLayout::setSpacing()
+{
+    QSizeF min(10, 10);
+    QSizeF pref(20, 20);
+    QSizeF max(50, 50);
+
+    QGraphicsWidget *a = createItem(min, pref, max);
+    QGraphicsWidget *b = createItem(min, pref, max);
+    QGraphicsWidget *c = createItem(min, pref, max);
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->addCornerAnchors(l, Qt::TopLeftCorner, a, Qt::TopLeftCorner);
+    l->addCornerAnchors(b, Qt::TopRightCorner, l, Qt::TopRightCorner);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+
+    l->addAnchors(l, c, Qt::Horizontal);
+
+    l->addAnchor(a, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+
+    p->setLayout(l);
+    l->setSpacing(1);
+
+    // don't let the style influence the test.
+    l->setContentsMargins(0, 0, 0, 0);
+
+    QGraphicsScene scene;
+    scene.addItem(p);
+    QGraphicsView *view = new QGraphicsView(&scene);
+    view->show();
+    p->show();
+
+    QApplication::processEvents();
+#ifdef Q_WS_MAC
+    QTest::qWait(200);
+#endif
+    QCOMPARE(a->geometry(), QRectF(0, 0, 20, 20));
+    QCOMPARE(b->geometry(), QRectF(21, 0, 20, 20));
+    QCOMPARE(c->geometry(), QRectF(0, 21, 41, 20));
+
+    l->setHorizontalSpacing(4);
+    QApplication::processEvents();
+    p->adjustSize();
+    QCOMPARE(a->geometry(), QRectF(0, 0, 20, 20));
+    QCOMPARE(b->geometry(), QRectF(24, 0, 20, 20));
+    QCOMPARE(c->geometry(), QRectF(0, 21, 44, 20));
+
+    l->setVerticalSpacing(0);
+    QApplication::processEvents();
+    p->adjustSize();
+    QCOMPARE(a->geometry(), QRectF(0, 0, 20, 20));
+    QCOMPARE(b->geometry(), QRectF(24, 0, 20, 20));
+    QCOMPARE(c->geometry(), QRectF(0, 20, 44, 20));
+
+    delete p;
+    delete view;
+}
+
+class CustomLayoutStyle : public QWindowsStyle
+{
+    Q_OBJECT
+public:
+    CustomLayoutStyle() : QWindowsStyle()
+    {
+        hspacing = 5;
+        vspacing = 10;
+    }
+
+    virtual int pixelMetric(PixelMetric metric, const QStyleOption * option = 0,
+                            const QWidget * widget = 0 ) const;
+
+    int hspacing;
+    int vspacing;
+
+protected slots:
+    int layoutSpacingImplementation(QSizePolicy::ControlType control1,
+                                    QSizePolicy::ControlType control2,
+                                    Qt::Orientation orientation,
+                                    const QStyleOption *option = 0,
+                                    const QWidget *widget = 0) const;
+
+};
+
+#define CT1(c) CT2(c, c)
+#define CT2(c1, c2) ((uint)c1 << 16) | (uint)c2
+
+int CustomLayoutStyle::layoutSpacingImplementation(QSizePolicy::ControlType control1,
+                                QSizePolicy::ControlType control2,
+                                Qt::Orientation orientation,
+                                const QStyleOption * /*option = 0*/,
+                                const QWidget * /*widget = 0*/) const
+{
+    if (orientation == Qt::Horizontal) {
+        switch (CT2(control1, control2)) {
+            case CT1(QSizePolicy::PushButton):
+                return 2;
+                break;
+        }
+        return 5;
+    } else {
+        switch (CT2(control1, control2)) {
+            case CT1(QSizePolicy::RadioButton):
+                return 2;
+                break;
+
+        }
+        return 10;
+    }
+}
+
+int CustomLayoutStyle::pixelMetric(PixelMetric metric, const QStyleOption * option /*= 0*/,
+                                   const QWidget * widget /*= 0*/ ) const
+{
+    switch (metric) {
+        case PM_LayoutLeftMargin:
+            return 0;
+        break;
+        case PM_LayoutTopMargin:
+            return 3;
+        break;
+        case PM_LayoutRightMargin:
+            return 6;
+        break;
+        case PM_LayoutBottomMargin:
+            return 9;
+        break;
+        case PM_LayoutHorizontalSpacing:
+            return hspacing;
+        case PM_LayoutVerticalSpacing:
+            return vspacing;
+        break;
+        default:
+            break;
+    }
+    return QWindowsStyle::pixelMetric(metric, option, widget);
+}
+
+void tst_QGraphicsAnchorLayout::styleDefaults()
+{
+    QSizeF min (10, 10);
+    QSizeF pref(20, 20);
+    QSizeF max (50, 50);
+
+    /*
+    create this layout, where a,b have controlType QSizePolicy::RadioButton
+    c,d have controlType QSizePolicy::PushButton:
+    +-------+
+    |a      |
+    |  b    |
+    |    c  |
+    |      d|
+    +-------+
+    */
+    QGraphicsScene scene;
+    QGraphicsWidget *a = createItem(min, pref, max);
+    QSizePolicy spRadioButton = a->sizePolicy();
+    spRadioButton.setControlType(QSizePolicy::RadioButton);
+    a->setSizePolicy(spRadioButton);
+
+    QGraphicsWidget *b = createItem(min, pref, max);
+    b->setSizePolicy(spRadioButton);
+
+    QGraphicsWidget *c = createItem(min, pref, max);
+    QSizePolicy spPushButton = c->sizePolicy();
+    spPushButton.setControlType(QSizePolicy::PushButton);
+    c->setSizePolicy(spPushButton);
+
+    QGraphicsWidget *d = createItem(min, pref, max);
+    d->setSizePolicy(spPushButton);
+
+    QGraphicsWidget *window = new QGraphicsWidget(0, Qt::Window);
+
+    // Test layoutSpacingImplementation
+    CustomLayoutStyle *style = new CustomLayoutStyle;
+    style->hspacing = -1;
+    style->vspacing = -1;
+    window->setStyle(style);
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+
+    l->addCornerAnchors(l, Qt::TopLeftCorner, a, Qt::TopLeftCorner);
+    l->addCornerAnchors(a, Qt::BottomRightCorner, b, Qt::TopLeftCorner);
+    l->addCornerAnchors(b, Qt::BottomRightCorner, c, Qt::TopLeftCorner);
+    l->addCornerAnchors(c, Qt::BottomRightCorner, d, Qt::TopLeftCorner);
+    l->addCornerAnchors(d, Qt::BottomRightCorner, l, Qt::BottomRightCorner);
+
+    window->setLayout(l);
+
+    scene.addItem(window);
+
+    window->show();
+    QGraphicsView view(&scene);
+    view.resize(200, 200);
+    view.show();
+
+    window->adjustSize();
+    QCOMPARE(a->geometry(), QRectF(0,   3, 20, 20));    //radio
+    QCOMPARE(b->geometry(), QRectF(25, 25, 20, 20));    //radio
+    QCOMPARE(c->geometry(), QRectF(50, 55, 20, 20));    //push
+    QCOMPARE(d->geometry(), QRectF(72, 85, 20, 20));    //push
+    QCOMPARE(l->geometry(), QRectF(0,   0, 98, 114));
+
+
+    // Test pixelMetric(PM_Layout{Horizontal|Vertical}Spacing
+    window->setStyle(0);
+
+    style->hspacing = 1;
+    style->vspacing = 2;
+
+    window->setStyle(style);
+    window->adjustSize();
+    QCOMPARE(a->geometry(), QRectF(0,   3, 20, 20));
+    QCOMPARE(b->geometry(), QRectF(21, 25, 20, 20));
+    QCOMPARE(c->geometry(), QRectF(42, 47, 20, 20));
+    QCOMPARE(d->geometry(), QRectF(63, 69, 20, 20));
+    QCOMPARE(l->geometry(), QRectF(0,   0, 89, 98));
+
+    window->setStyle(0);
+    delete style;
+}
+
+
+/*!
+    Taken from "hard" complex case, found at
+    https://cwiki.nokia.com/S60QTUI/AnchorLayoutComplexCases
+
+    This layout has a special property, since it has two possible solutions for its minimum size.
+
+    For instance, when it is in its minimum size - the layout have two possible solutions:
+    1. c.width == 10, e.width == 10 and g.width == 10
+       (all others have width 0)
+    2. d.width == 10 and g.width == 10
+       (all others have width 0)
+
+    It also has several solutions for preferred size.
+*/
+static QGraphicsAnchorLayout *createAmbiguousS60Layout()
+{
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    QSizeF min(0, 10);
+    QSizeF pref(50, 10);
+    QSizeF max(100, 10);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "a");
+    QGraphicsWidget *b = createItem(min, pref, max, "b");
+    QGraphicsWidget *c = createItem(min, pref, max, "c");
+    QGraphicsWidget *d = createItem(min, pref, max, "d");
+    QGraphicsWidget *e = createItem(min, pref, max, "e");
+    QGraphicsWidget *f = createItem(min, pref, max, "f");
+    QGraphicsWidget *g = createItem(min, pref, max, "g");
+
+    //<!-- Trunk -->
+    setAnchor(l, l, Qt::AnchorLeft, a, Qt::AnchorLeft, 10);
+    setAnchor(l, a, Qt::AnchorRight, b, Qt::AnchorLeft, 10);
+    setAnchor(l, b, Qt::AnchorRight, c, Qt::AnchorLeft, 10);
+    setAnchor(l, c, Qt::AnchorRight, d, Qt::AnchorLeft, 10);
+    setAnchor(l, d, Qt::AnchorRight, l, Qt::AnchorRight, 10);
+
+    //<!-- Above trunk -->
+    setAnchor(l, b, Qt::AnchorLeft, e, Qt::AnchorLeft, 10);
+    setAnchor(l, e, Qt::AnchorRight, d, Qt::AnchorLeft, 10);
+
+    //<!-- Below trunk -->
+    setAnchor(l, a, Qt::AnchorHorizontalCenter, g, Qt::AnchorLeft, 10);
+    setAnchor(l, g, Qt::AnchorRight, f, Qt::AnchorHorizontalCenter, 10);
+    setAnchor(l, c, Qt::AnchorLeft, f, Qt::AnchorLeft, 10);
+    setAnchor(l, f, Qt::AnchorRight, d, Qt::AnchorRight, 10);
+
+    //<!-- vertical is simpler -->
+    setAnchor(l, l, Qt::AnchorTop, e, Qt::AnchorTop, 0);
+    setAnchor(l, e, Qt::AnchorBottom, a, Qt::AnchorTop, 0);
+    setAnchor(l, e, Qt::AnchorBottom, b, Qt::AnchorTop, 0);
+    setAnchor(l, e, Qt::AnchorBottom, c, Qt::AnchorTop, 0);
+    setAnchor(l, e, Qt::AnchorBottom, d, Qt::AnchorTop, 0);
+    setAnchor(l, a, Qt::AnchorBottom, f, Qt::AnchorTop, 0);
+    setAnchor(l, a, Qt::AnchorBottom, b, Qt::AnchorBottom, 0);
+    setAnchor(l, a, Qt::AnchorBottom, c, Qt::AnchorBottom, 0);
+    setAnchor(l, a, Qt::AnchorBottom, d, Qt::AnchorBottom, 0);
+    setAnchor(l, f, Qt::AnchorBottom, g, Qt::AnchorTop, 0);
+    setAnchor(l, g, Qt::AnchorBottom, l, Qt::AnchorBottom, 0);
+    return l;
+}
+
+void tst_QGraphicsAnchorLayout::hardComplexS60()
+{
+    QGraphicsAnchorLayout *l = createAmbiguousS60Layout();
+    QCOMPARE(l->count(), 7);
+
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+    p->setLayout(l);
+
+    QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+    QCOMPARE(layoutMinimumSize, QSizeF(60, 40));
+    // expected preferred might be wrong, (haven't manually verified it)
+    QSizeF layoutPreferredSize = l->effectiveSizeHint(Qt::PreferredSize);
+    QCOMPARE(layoutPreferredSize, QSizeF(220, 40));
+    QSizeF layoutMaximumSize = l->effectiveSizeHint(Qt::MaximumSize);
+    QCOMPARE(layoutMaximumSize, QSizeF(240, 40));
+
+    delete p;
+}
+
+void tst_QGraphicsAnchorLayout::stability()
+{
+    QVector<QRectF> geometries;
+    geometries.resize(7);
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+    bool sameAsPreviousArrangement = true;
+    // it usually fails after 3-4 iterations
+    for (int pass = 0; pass < 20 && sameAsPreviousArrangement; ++pass) {
+        // In case we need to "scramble" the heap allocator to provoke this bug.
+        //static const int primes[] = {2, 3, 5, 13, 89, 233, 1597, 28657, 514229}; // fibo primes
+        //const int primeCount = sizeof(primes)/sizeof(int);
+        //int alloc = primes[pass % primeCount] + pass;
+        //void *mem = qMalloc(alloc);
+        //qFree(mem);
+        QGraphicsAnchorLayout *l = createAmbiguousS60Layout();
+        p->setLayout(l);
+        QSizeF layoutMinimumSize = l->effectiveSizeHint(Qt::MinimumSize);
+        l->setGeometry(QRectF(QPointF(0,0), layoutMinimumSize));
+        QApplication::processEvents();
+        for (int i = l->count() - 1; i >=0 && sameAsPreviousArrangement; --i) {
+            QRectF geom = l->itemAt(i)->geometry();
+            if (pass != 0) {
+                sameAsPreviousArrangement = (geometries[i] == geom);
+            }
+            geometries[i] = geom;
+        }
+        p->setLayout(0);    // uninstalls and deletes the layout
+        QApplication::processEvents();
+    }
+    delete p;
+    QEXPECT_FAIL("", "The layout have several solutions, but which solution it picks is not stable", Continue);
+    QCOMPARE(sameAsPreviousArrangement, true);
+}
+
+void tst_QGraphicsAnchorLayout::delete_anchor()
+{
+    QGraphicsScene scene;
+    QSizeF minSize(0, 0);
+    QSizeF prefSize(50, 50);
+    QSizeF maxSize(100, 100);
+    QGraphicsWidget *w1 = createItem(minSize, prefSize, maxSize, "w1");
+    QGraphicsWidget *w2 = createItem(minSize, prefSize, maxSize, "w2");
+    QGraphicsWidget *w3 = createItem(minSize, prefSize, maxSize, "w3");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setSpacing(0);
+    l->setContentsMargins(0, 0, 0, 0);
+
+    // Horizontal
+    l->addAnchor(l, Qt::AnchorLeft, w1, Qt::AnchorLeft);
+    l->addAnchor(w1, Qt::AnchorRight, w2, Qt::AnchorLeft);
+    l->addAnchor(w2, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(w1, Qt::AnchorRight, w3, Qt::AnchorLeft);
+    l->addAnchor(w3, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    // Vertical
+    l->addAnchors(l, w1, Qt::Vertical);
+    l->addAnchors(l, w2, Qt::Vertical);
+    l->addAnchors(l, w3, Qt::Vertical);
+
+    QGraphicsAnchor *anchor = l->anchor(w3, Qt::AnchorRight, l, Qt::AnchorRight);
+    anchor->setSpacing(10);
+
+    QGraphicsWidget *p = new QGraphicsWidget;
+    p->setLayout(l);
+
+    QCOMPARE(l->count(), 3);
+
+    scene.addItem(p);
+    QGraphicsView *view = new QGraphicsView(&scene);
+    QApplication::processEvents();
+    // Should now be simplified
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize).width(), qreal(110));
+    QGraphicsAnchor *anchor1 = l->anchor(w3, Qt::AnchorRight, l, Qt::AnchorRight);
+    QVERIFY(anchor1);
+    QGraphicsAnchor *anchor2 = l->anchor(w3, Qt::AnchorRight, l, Qt::AnchorRight);
+    QVERIFY(anchor2);
+    QGraphicsAnchor *anchor3 = l->anchor(l, Qt::AnchorRight, w3, Qt::AnchorRight);
+    QVERIFY(anchor3);
+    QGraphicsAnchor *anchor4 = l->anchor(l, Qt::AnchorRight, w3, Qt::AnchorRight);
+    QVERIFY(anchor4);
+
+    // should all be the same object
+    QCOMPARE(anchor1, anchor2);
+    QCOMPARE(anchor2, anchor3);
+    QCOMPARE(anchor3, anchor4);
+
+    // check if removal works
+    delete anchor1;
+
+    QApplication::processEvents();
+
+    // it should also change the preferred size of the layout
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize).width(), qreal(100));
+
+    delete p;
+    delete view;
+}
+
+void tst_QGraphicsAnchorLayout::sizePolicy()
+{
+    QGraphicsScene scene;
+    QSizeF minSize(0, 0);
+    QSizeF prefSize(50, 50);
+    QSizeF maxSize(100, 100);
+    QGraphicsWidget *w1 = createItem(minSize, prefSize, maxSize, "w1");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setSpacing(0);
+    l->setContentsMargins(0, 0, 0, 0);
+
+    // horizontal and vertical
+    l->addAnchors(l, w1);
+
+    QGraphicsWidget *p = new QGraphicsWidget;
+    p->setLayout(l);
+
+    scene.addItem(p);
+    QGraphicsView *view = new QGraphicsView(&scene);
+
+    // QSizePolicy::Minimum
+    w1->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Minimum);
+    QApplication::processEvents();
+    w1->adjustSize();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(100, 100));
+
+    // QSizePolicy::Maximum
+    w1->setSizePolicy(QSizePolicy::Maximum, QSizePolicy::Maximum);
+    QApplication::processEvents();
+    w1->adjustSize();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(0, 0));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(50, 50));
+
+    // QSizePolicy::Fixed
+    w1->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    QApplication::processEvents();
+    w1->adjustSize();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(50, 50));
+
+    // QSizePolicy::Preferred
+    w1->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+    QApplication::processEvents();
+    w1->adjustSize();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(0, 0));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(100, 100));
+
+    // QSizePolicy::Ignored
+    w1->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
+    QApplication::processEvents();
+    w1->adjustSize();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(0, 0));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(0, 0));
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(100, 100));
+
+    // Anchor size policies
+    w1->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    QGraphicsAnchor *anchor = l->anchor(l, Qt::AnchorLeft, w1, Qt::AnchorLeft);
+    anchor->setSpacing(10);
+
+    // QSizePolicy::Minimum
+    anchor->setSizePolicy(QSizePolicy::Minimum);
+    QApplication::processEvents();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(60, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(60, 50));
+    // The layout has a maximum size of QWIDGETSIZE_MAX, so the result won't exceed that value.
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(QWIDGETSIZE_MAX, 50));
+
+    // QSizePolicy::Preferred
+    anchor->setSizePolicy(QSizePolicy::Preferred);
+    QApplication::processEvents();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(60, 50));
+    // The layout has a maximum size of QWIDGETSIZE_MAX, so the result won't exceed that value.
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(QWIDGETSIZE_MAX, 50));
+
+    // QSizePolicy::Maximum
+    anchor->setSizePolicy(QSizePolicy::Maximum);
+    QApplication::processEvents();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(60, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(60, 50));
+
+    // QSizePolicy::Ignored
+    anchor->setSizePolicy(QSizePolicy::Ignored);
+    QApplication::processEvents();
+
+    QCOMPARE(l->effectiveSizeHint(Qt::MinimumSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::PreferredSize), QSizeF(50, 50));
+    QCOMPARE(l->effectiveSizeHint(Qt::MaximumSize), QSizeF(QWIDGETSIZE_MAX, 50));
+
+    if (hasSimplification) {
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+        QVERIFY(!usedSimplex(l, Qt::Vertical));
+    }
+
+    delete p;
+    delete view;
+}
+
+/*!
+    \internal
+
+    Uses private API. (We have decided to pull hasConflicts() out of the API). However, it also
+    tests some tight conditions (almost-in-conflict) that we really want to test.
+*/
+void tst_QGraphicsAnchorLayout::conflicts()
+{
+    QGraphicsWidget *a = createItem(QSizeF(80,10), QSizeF(90,10), QSizeF(100,10), "a");
+    QGraphicsWidget *b = createItem(QSizeF(10,10), QSizeF(20,10), QSizeF(30,10), "b");
+    QGraphicsWidget *c = createItem(QSizeF(10,10), QSizeF(20,10), QSizeF(30,10), "c");
+
+    QGraphicsAnchorLayout *l;
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+
+    l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+
+    // with the following setup, 'a' cannot be larger than 30 we will first have a Simplex conflict
+
+    // horizontal
+    setAnchor(l, l, Qt::AnchorLeft, b, Qt::AnchorLeft);
+    setAnchor(l, b, Qt::AnchorRight, c, Qt::AnchorLeft);
+    setAnchor(l, c, Qt::AnchorRight, l, Qt::AnchorRight);
+    setAnchor(l, b, Qt::AnchorHorizontalCenter, a, Qt::AnchorLeft);
+    setAnchor(l, a, Qt::AnchorRight, c, Qt::AnchorHorizontalCenter);
+
+    // vertical
+    setAnchor(l, l, Qt::AnchorTop, a, Qt::AnchorTop);
+    setAnchor(l, a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    setAnchor(l, a, Qt::AnchorBottom, c, Qt::AnchorTop);
+    setAnchor(l, b, Qt::AnchorBottom, l, Qt::AnchorBottom);
+    setAnchor(l, c, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    p->setLayout(l);
+
+    QCOMPARE(layoutHasConflict(l), true);
+
+    a->setMinimumSize(QSizeF(29,10));
+    QCOMPARE(layoutHasConflict(l), false);
+
+    a->setMinimumSize(QSizeF(30,10));
+    QCOMPARE(layoutHasConflict(l), false);
+
+    delete p;
+}
+
+void tst_QGraphicsAnchorLayout::floatConflict()
+{
+    QGraphicsWidget *a = createItem(QSizeF(80,10), QSizeF(90,10), QSizeF(100,10), "a");
+    QGraphicsWidget *b = createItem(QSizeF(80,10), QSizeF(90,10), QSizeF(100,10), "b");
+
+    QGraphicsAnchorLayout *l;
+    QGraphicsWidget *p = new QGraphicsWidget(0, Qt::Window);
+
+    l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+
+    p->setLayout(l);
+
+    // horizontal
+    // with this anchor we have two floating items
+    setAnchor(l, a, Qt::AnchorRight, b, Qt::AnchorLeft);
+
+    // Just checking if the layout is handling well the removal of floating items
+    delete l->anchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+    QCOMPARE(l->count(), 0);
+    QCOMPARE(layoutHasConflict(l), false);
+
+    // setting back the same anchor
+    setAnchor(l, a, Qt::AnchorRight, b, Qt::AnchorLeft);
+
+    // We don't support floating items but they should be counted as if they are in the layout
+    QCOMPARE(l->count(), 2);
+    // Although, we have an invalid situation
+    QCOMPARE(layoutHasConflict(l), true);
+
+    // Semi-floats are supported
+    setAnchor(l, a, Qt::AnchorLeft, l, Qt::AnchorLeft);
+    QCOMPARE(l->count(), 2);
+
+    // Vertically the layout has floating items. Therefore, we have a conflict
+    QCOMPARE(layoutHasConflict(l), true);
+
+    // No more floating items
+    setAnchor(l, b, Qt::AnchorRight, l, Qt::AnchorRight);
+    setAnchor(l, a, Qt::AnchorTop, l, Qt::AnchorTop);
+    setAnchor(l, a, Qt::AnchorBottom, l, Qt::AnchorBottom);
+    setAnchor(l, b, Qt::AnchorTop, l, Qt::AnchorTop);
+    setAnchor(l, b, Qt::AnchorBottom, l, Qt::AnchorBottom);
+    QCOMPARE(layoutHasConflict(l), false);
+
+    delete p;
+}
+
+void tst_QGraphicsAnchorLayout::infiniteMaxSizes()
+{
+    if (sizeof(qreal) <= 4) {
+        QSKIP("qreal has too little precision, result will be wrong", SkipAll);
+    }
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    QSizeF min(10, 10);
+    QSizeF pref(50, 10);
+    QSizeF max(QWIDGETSIZE_MAX, 10);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "a");
+    QGraphicsWidget *b = createItem(min, pref, max, "b");
+    QGraphicsWidget *c = createItem(min, pref, max, "c");
+    QGraphicsWidget *d = createItem(min, pref, max, "d");
+    QGraphicsWidget *e = createItem(min, pref, max, "e");
+
+    //<!-- Trunk -->
+    setAnchor(l, l, Qt::AnchorLeft, a, Qt::AnchorLeft, 0);
+    setAnchor(l, a, Qt::AnchorRight, b, Qt::AnchorLeft, 0);
+    setAnchor(l, b, Qt::AnchorRight, c, Qt::AnchorLeft, 0);
+    setAnchor(l, c, Qt::AnchorRight, d, Qt::AnchorLeft, 0);
+    setAnchor(l, d, Qt::AnchorRight, l, Qt::AnchorRight, 0);
+    setAnchor(l, b, Qt::AnchorHorizontalCenter, e, Qt::AnchorLeft, 0);
+    setAnchor(l, e, Qt::AnchorRight, c, Qt::AnchorHorizontalCenter, 0);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    QCOMPARE(int(p.effectiveSizeHint(Qt::MaximumSize).width()),
+             QWIDGETSIZE_MAX);
+
+    p.resize(200, 10);
+    QCOMPARE(a->geometry(), QRectF(0, 0, 50, 10));
+    QCOMPARE(b->geometry(), QRectF(50, 0, 50, 10));
+    QCOMPARE(c->geometry(), QRectF(100, 0, 50, 10));
+    QCOMPARE(d->geometry(), QRectF(150, 0, 50, 10));
+
+    p.resize(1000, 10);
+    QCOMPARE(a->geometry(), QRectF(0, 0, 250, 10));
+    QCOMPARE(b->geometry(), QRectF(250, 0, 250, 10));
+    QCOMPARE(c->geometry(), QRectF(500, 0, 250, 10));
+    QCOMPARE(d->geometry(), QRectF(750, 0, 250, 10));
+
+    p.resize(40000, 10);
+    QCOMPARE(a->geometry(), QRectF(0, 0, 10000, 10));
+    QCOMPARE(b->geometry(), QRectF(10000, 0, 10000, 10));
+    QCOMPARE(c->geometry(), QRectF(20000, 0, 10000, 10));
+    QCOMPARE(d->geometry(), QRectF(30000, 0, 10000, 10));
+}
+
+void tst_QGraphicsAnchorLayout::simplifiableUnfeasible()
+{
+    QGraphicsWidget *a = createItem(QSizeF(70.0, 100.0),
+                                    QSizeF(100.0, 100.0),
+                                    QSizeF(100.0, 100.0), "A");
+
+    QGraphicsWidget *b = createItem(QSizeF(110.0, 100.0),
+                                    QSizeF(150.0, 100.0),
+                                    QSizeF(190.0, 100.0), "B");
+
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    l->addAnchors(l, a, Qt::Horizontal);
+    l->addAnchor(l, Qt::AnchorLeft, b, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorRight, a, Qt::AnchorRight);
+
+    QCOMPARE(l->count(), 2);
+
+    QGraphicsWidget p;
+    p.setLayout(l);
+
+    l->invalidate();
+    QVERIFY(layoutHasConflict(l));
+    if (hasSimplification)
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+
+    // Now we make it valid
+    b->setMinimumWidth(100);
+
+    l->invalidate();
+    QVERIFY(!layoutHasConflict(l));
+    if (hasSimplification)
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+
+    // And make it invalid again
+    a->setPreferredWidth(70);
+    a->setMaximumWidth(70);
+
+    l->invalidate();
+    QVERIFY(layoutHasConflict(l));
+    if (hasSimplification)
+        QVERIFY(!usedSimplex(l, Qt::Horizontal));
+}
+
+/*
+  Test whether the anchor direction can prevent it from
+  being simplificated
+*/
+void tst_QGraphicsAnchorLayout::simplificationVsOrder()
+{
+    QSizeF min(10, 10);
+    QSizeF pref(20, 10);
+    QSizeF max(50, 10);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "A");
+    QGraphicsWidget *b = createItem(min, pref, max, "B");
+    QGraphicsWidget *c = createItem(min, pref, max, "C");
+
+    QGraphicsWidget frame;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&frame);
+
+    // Bulk anchors
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorLeft, c, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    // Problematic anchor, direction b->c
+    QGraphicsAnchor *anchor = l->addAnchor(b, Qt::AnchorRight, c, Qt::AnchorRight);
+    anchor->setSpacing(5);
+
+    l->effectiveSizeHint(Qt::MinimumSize);
+    if (hasSimplification) {
+        QCOMPARE(usedSimplex(l, Qt::Horizontal), false);
+        QCOMPARE(usedSimplex(l, Qt::Vertical), false);
+    }
+
+    // Problematic anchor, direction c->b
+    delete anchor;
+    anchor = l->addAnchor(c, Qt::AnchorRight, b, Qt::AnchorRight);
+    anchor->setSpacing(5);
+
+    l->effectiveSizeHint(Qt::MinimumSize);
+    if (hasSimplification) {
+        QCOMPARE(usedSimplex(l, Qt::Horizontal), false);
+        QCOMPARE(usedSimplex(l, Qt::Vertical), false);
+    }
+}
+
+void tst_QGraphicsAnchorLayout::parallelSimplificationOfCenter()
+{
+    QSizeF min(10, 10);
+    QSizeF pref(20, 10);
+    QSizeF max(50, 10);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "A");
+    QGraphicsWidget *b = createItem(min, pref, max, "B");
+
+    QGraphicsWidget parent;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&parent);
+    l->setContentsMargins(0, 0, 0, 0);
+
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(l, Qt::AnchorRight, a, Qt::AnchorRight);
+
+    l->addAnchor(a, Qt::AnchorHorizontalCenter, b, Qt::AnchorLeft);
+    l->addAnchor(b, Qt::AnchorRight, a, Qt::AnchorRight);
+
+    parent.resize(l->effectiveSizeHint(Qt::PreferredSize));
+
+    QCOMPARE(a->geometry(), QRectF(0, 0, 40, 10));
+    QCOMPARE(b->geometry(), QRectF(20, 0, 20, 10));
+}
+
+/*
+    Test whether redundance of anchors (in this case by using addCornerAnchors), will
+    prevent simplification to take place when it should.
+*/
+void tst_QGraphicsAnchorLayout::simplificationVsRedundance()
+{
+    QSizeF min(10, 10);
+    QSizeF pref(20, 10);
+    QSizeF max(50, 30);
+
+    QGraphicsWidget *a = createItem(min, pref, max, "A");
+    QGraphicsWidget *b = createItem(min, pref, max, "B");
+    QGraphicsWidget *c = createItem(min, pref, max, "C");
+
+    QGraphicsWidget frame;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&frame);
+
+    l->addCornerAnchors(a, Qt::TopLeftCorner, l, Qt::TopLeftCorner);
+    l->addCornerAnchors(a, Qt::BottomLeftCorner, l, Qt::BottomLeftCorner);
+
+    l->addCornerAnchors(b, Qt::TopLeftCorner, a, Qt::TopRightCorner);
+    l->addCornerAnchors(b, Qt::TopRightCorner, l, Qt::TopRightCorner);
+
+    l->addCornerAnchors(c, Qt::TopLeftCorner, b, Qt::BottomLeftCorner);
+    l->addCornerAnchors(c, Qt::BottomLeftCorner, a, Qt::BottomRightCorner);
+    l->addCornerAnchors(c, Qt::TopRightCorner, b, Qt::BottomRightCorner);
+    l->addCornerAnchors(c, Qt::BottomRightCorner, l, Qt::BottomRightCorner);
+
+    l->effectiveSizeHint(Qt::MinimumSize);
+
+    QCOMPARE(layoutHasConflict(l), false);
+
+    if (!hasSimplification)
+        QEXPECT_FAIL("", "Test depends on simplification.", Abort);
+
+    QCOMPARE(usedSimplex(l, Qt::Horizontal), false);
+    QCOMPARE(usedSimplex(l, Qt::Vertical), false);
+}
+
+/*
+  Avoid regression where the saved prefSize would be lost. This was
+  solved by saving the original spacing in the QGraphicsAnchorPrivate class
+*/
+void tst_QGraphicsAnchorLayout::spacingPersistency()
+{
+    QGraphicsWidget w;
+    QGraphicsWidget *a = createItem();
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&w);
+
+    l->addAnchors(l, a, Qt::Horizontal);
+    QGraphicsAnchor *anchor = l->anchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+
+    anchor->setSpacing(-30);
+    QCOMPARE(anchor->spacing(), -30.0);
+
+    anchor->setSpacing(30);
+    QCOMPARE(anchor->spacing(), 30.0);
+
+    anchor->setSizePolicy(QSizePolicy::Ignored);
+    w.effectiveSizeHint(Qt::PreferredSize);
+
+    QCOMPARE(anchor->spacing(), 30.0);
+}
+
+/*
+    Test whether a correct preferred size is set when a "snake" sequence is in parallel with the
+    layout or half of the layout. The tricky thing here is that all items on the snake should
+    keep their preferred sizes.
+*/
+void tst_QGraphicsAnchorLayout::snakeParallelWithLayout()
+{
+    QSizeF min(10, 20);
+    QSizeF pref(50, 20);
+    QSizeF max(100, 20);
+
+    QGraphicsWidget *a = createItem(max, max, max, "A");
+    QGraphicsWidget *b = createItem(min, pref, max, "B");
+    QGraphicsWidget *c = createItem(max, max, max, "C");
+
+    QGraphicsWidget parent;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&parent);
+    l->setContentsMargins(0, 0, 0, 0);
+    l->setSpacing(0);
+
+    // First we'll do the case in parallel with the entire layout...
+    l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorRight);
+    l->addAnchor(b, Qt::AnchorLeft, c, Qt::AnchorLeft);
+    l->addAnchor(c, Qt::AnchorRight, l, Qt::AnchorRight);
+
+    l->addAnchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    l->addAnchor(a, Qt::AnchorBottom, b, Qt::AnchorTop);
+    l->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);
+    l->addAnchor(c, Qt::AnchorBottom, l, Qt::AnchorBottom);
+
+    parent.resize(l->effectiveSizeHint(Qt::PreferredSize));
+
+    // Note that A and C are fixed in the maximum size
+    QCOMPARE(l->geometry(), QRectF(QPointF(0, 0), QSizeF(150, 60)));
+    QCOMPARE(a->geometry(), QRectF(QPointF(0, 0), max));
+    QCOMPARE(b->geometry(), QRectF(QPointF(50, 20), pref));
+    QCOMPARE(c->geometry(), QRectF(QPointF(50, 40), max));
+
+    // Then, we change the "snake" to be in parallel with half of the layout
+    delete l->anchor(c, Qt::AnchorRight, l, Qt::AnchorRight);
+    l->addAnchor(c, Qt::AnchorRight, l, Qt::AnchorHorizontalCenter);
+
+    parent.resize(l->effectiveSizeHint(Qt::PreferredSize));
+
+    QCOMPARE(l->geometry(), QRectF(QPointF(0, 0), QSizeF(300, 60)));
+    QCOMPARE(a->geometry(), QRectF(QPointF(0, 0), max));
+    QCOMPARE(b->geometry(), QRectF(QPointF(50, 20), pref));
+    QCOMPARE(c->geometry(), QRectF(QPointF(50, 40), max));
+}
+
+/*
+  Avoid regression where the sizeHint constraints would not be
+  created for a parallel anchor that included the first layout half
+*/
+void tst_QGraphicsAnchorLayout::parallelToHalfLayout()
+{
+    QGraphicsWidget *a = createItem();
+
+    QGraphicsWidget w;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&w);
+    l->setContentsMargins(10, 10, 10, 10);
+
+    l->addAnchors(l, a, Qt::Vertical);
+
+    QGraphicsAnchor *anchor;
+    anchor = l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    anchor->setSpacing(5);
+    anchor = l->addAnchor(l, Qt::AnchorHorizontalCenter, a, Qt::AnchorRight);
+    anchor->setSpacing(-5);
+
+    const QSizeF minimumSizeHint = w.effectiveSizeHint(Qt::MinimumSize);
+    const QSizeF preferredSizeHint = w.effectiveSizeHint(Qt::PreferredSize);
+    const QSizeF maximumSizeHint = w.effectiveSizeHint(Qt::MaximumSize);
+
+    const QSizeF overhead = QSizeF(10 + 5 + 5, 10) * 2;
+
+    QCOMPARE(minimumSizeHint, QSizeF(200, 100) + overhead);
+    QCOMPARE(preferredSizeHint, QSizeF(300, 100) + overhead);
+    QCOMPARE(maximumSizeHint, QSizeF(400, 100) + overhead);
+}
+
+void tst_QGraphicsAnchorLayout::globalSpacing()
+{
+    QGraphicsWidget *a = createItem();
+    QGraphicsWidget *b = createItem();
+
+    QGraphicsWidget w;
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout(&w);
+
+    l->addCornerAnchors(l, Qt::TopLeftCorner, a, Qt::TopLeftCorner);
+    l->addCornerAnchors(a, Qt::BottomRightCorner, b, Qt::TopLeftCorner);
+    l->addCornerAnchors(b, Qt::BottomRightCorner, l, Qt::BottomRightCorner);
+
+    w.resize(w.effectiveSizeHint(Qt::PreferredSize));
+    qreal vSpacing = b->geometry().top() - a->geometry().bottom();
+    qreal hSpacing = b->geometry().left() - a->geometry().right();
+
+    // Set spacings manually
+    l->setVerticalSpacing(vSpacing + 10);
+    l->setHorizontalSpacing(hSpacing + 5);
+
+    w.resize(w.effectiveSizeHint(Qt::PreferredSize));
+    qreal newVSpacing = b->geometry().top() - a->geometry().bottom();
+    qreal newHSpacing = b->geometry().left() - a->geometry().right();
+
+    QCOMPARE(newVSpacing, vSpacing + 10);
+    QCOMPARE(newHSpacing, hSpacing + 5);
+
+    // Set a negative spacing. This will unset the previous spacing and
+    // bring back the widget-defined spacing.
+    l->setSpacing(-1);
+
+    w.resize(w.effectiveSizeHint(Qt::PreferredSize));
+    newVSpacing = b->geometry().top() - a->geometry().bottom();
+    newHSpacing = b->geometry().left() - a->geometry().right();
+
+    QCOMPARE(newVSpacing, vSpacing);
+    QCOMPARE(newHSpacing, hSpacing);
+}
+
+void tst_QGraphicsAnchorLayout::graphicsAnchorHandling()
+{
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout();
+    QGraphicsWidget *a = createItem();
+
+    l->addAnchors(l, a);
+
+    QGraphicsAnchor *layoutAnchor = l->anchor(l, Qt::AnchorTop, l, Qt::AnchorBottom);
+    QGraphicsAnchor *itemAnchor = l->anchor(a, Qt::AnchorTop, a, Qt::AnchorBottom);
+    QGraphicsAnchor *invalidAnchor = l->anchor(a, Qt::AnchorTop, l, Qt::AnchorBottom);
+
+    // Ensure none of these anchors are accessible.
+    QVERIFY(layoutAnchor == 0);
+    QVERIFY(itemAnchor == 0);
+    QVERIFY(invalidAnchor == 0);
+
+    // Hook the anchors to a QObject
+    QObject object;
+    QGraphicsAnchor *userAnchor = l->anchor(l, Qt::AnchorTop, a, Qt::AnchorTop);
+    userAnchor->setParent(&object);
+    userAnchor = l->anchor(l, Qt::AnchorBottom, a, Qt::AnchorBottom);
+    userAnchor->setParent(&object);
+    userAnchor = l->anchor(l, Qt::AnchorRight, a, Qt::AnchorRight);
+    userAnchor->setParent(&object);
+    userAnchor = l->anchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
+    userAnchor->setParent(&object);
+
+    QCOMPARE(object.children().size(), 4);
+
+    // Delete layout, this will cause all anchors to be deleted internally.
+    // We expect the public QGraphicsAnchor instances to be deleted too.
+    delete l;
+    QCOMPARE(object.children().size(), 0);
+
+    delete a;
+}
+
+void tst_QGraphicsAnchorLayout::invalidHierarchyCheck()
+{
+    QGraphicsWidget window(0, Qt::Window);
+    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+    window.setLayout(l);
+
+    QCOMPARE(l->count(), 0);
+    QTest::ignoreMessage(QtWarningMsg, "QGraphicsAnchorLayout::addAnchor(): "
+                         "You cannot add the parent of the layout to the layout.");
+    QVERIFY(!l->addAnchor(l, Qt::AnchorLeft, &window, Qt::AnchorLeft));
+    QTest::ignoreMessage(QtWarningMsg, "QGraphicsAnchorLayout::addAnchor(): "
+                         "You cannot add the parent of the layout to the layout.");
+    l->addAnchors(l, &window);
+    QTest::ignoreMessage(QtWarningMsg, "QGraphicsAnchorLayout::addAnchor(): "
+                         "You cannot add the parent of the layout to the layout.");
+    l->addCornerAnchors(l, Qt::TopLeftCorner, &window, Qt::TopLeftCorner);
+    QCOMPARE(l->count(), 0);
+}
+
+QTEST_MAIN(tst_QGraphicsAnchorLayout)
+#include "tst_qgraphicsanchorlayout.moc"