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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the examples 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QGraphicsWidget>
+#include <QGraphicsProxyWidget>
+#include <QGraphicsAnchorLayout>
+#include <QtWidgets>
+
+static QGraphicsProxyWidget *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 = "0")
+{
+ QGraphicsProxyWidget *w = new QGraphicsProxyWidget;
+ w->setWidget(new QPushButton(name));
+ w->setData(0, name);
+ w->setMinimumSize(minimum);
+ w->setPreferredSize(preferred);
+ w->setMaximumSize(maximum);
+
+ w->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
+ return w;
+}
+
+int main(int argc, char **argv)
+{
+ QApplication app(argc, argv);
+
+ QGraphicsScene scene;
+ scene.setSceneRect(0, 0, 800, 480);
+
+ QSizeF minSize(30, 100);
+ QSizeF prefSize(210, 100);
+ QSizeF maxSize(300, 100);
+
+ QGraphicsProxyWidget *a = createItem(minSize, prefSize, maxSize, "A");
+ QGraphicsProxyWidget *b = createItem(minSize, prefSize, maxSize, "B");
+ QGraphicsProxyWidget *c = createItem(minSize, prefSize, maxSize, "C");
+ QGraphicsProxyWidget *d = createItem(minSize, prefSize, maxSize, "D");
+ QGraphicsProxyWidget *e = createItem(minSize, prefSize, maxSize, "E");
+ QGraphicsProxyWidget *f = createItem(QSizeF(30, 50), QSizeF(150, 50), maxSize, "F (overflow)");
+ QGraphicsProxyWidget *g = createItem(QSizeF(30, 50), QSizeF(30, 100), maxSize, "G (overflow)");
+
+ QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
+ l->setSpacing(0);
+
+ QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window);
+ w->setPos(20, 20);
+ w->setLayout(l);
+
+ // 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);
+
+
+ scene.addItem(w);
+ scene.setBackgroundBrush(Qt::darkGreen);
+ QGraphicsView view(&scene);
+
+ view.show();
+
+ return app.exec();
+}