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diff --git a/examples/widgets/graphicsview/flowlayout/flowlayout.cpp b/examples/widgets/graphicsview/flowlayout/flowlayout.cpp
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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, 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 The Qt Company Ltd 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 "flowlayout.h"
-
-#include <QtMath>
-
-FlowLayout::FlowLayout(QGraphicsLayoutItem *parent) : QGraphicsLayout(parent)
-{
- QSizePolicy sp = sizePolicy();
- sp.setHeightForWidth(true);
- setSizePolicy(sp);
-}
-
-void FlowLayout::insertItem(int index, QGraphicsLayoutItem *item)
-{
- item->setParentLayoutItem(this);
- if (index > m_items.count() || index < 0)
- index = m_items.count();
- m_items.insert(index, item);
- invalidate();
-}
-
-int FlowLayout::count() const
-{
- return m_items.count();
-}
-
-QGraphicsLayoutItem *FlowLayout::itemAt(int index) const
-{
- return m_items.value(index);
-}
-
-void FlowLayout::removeAt(int index)
-{
- m_items.removeAt(index);
- invalidate();
-}
-
-qreal FlowLayout::spacing(Qt::Orientation o) const
-{
- return m_spacing[int(o) - 1];
-}
-
-void FlowLayout::setSpacing(Qt::Orientations o, qreal spacing)
-{
- if (o & Qt::Horizontal)
- m_spacing[0] = spacing;
- if (o & Qt::Vertical)
- m_spacing[1] = spacing;
-}
-
-void FlowLayout::setGeometry(const QRectF &geom)
-{
- QGraphicsLayout::setGeometry(geom);
- doLayout(geom, true);
-}
-
-qreal FlowLayout::doLayout(const QRectF &geom, bool applyNewGeometry) const
-{
- qreal left, top, right, bottom;
- getContentsMargins(&left, &top, &right, &bottom);
- const qreal maxw = geom.width() - left - right;
-
- qreal x = 0;
- qreal y = 0;
- qreal maxRowHeight = 0;
- QSizeF pref;
- for (QGraphicsLayoutItem *item : m_items) {
- pref = item->effectiveSizeHint(Qt::PreferredSize);
- maxRowHeight = qMax(maxRowHeight, pref.height());
-
- qreal next_x;
- next_x = x + pref.width();
- if (next_x > maxw) {
- if (qFuzzyIsNull(x)) {
- pref.setWidth(maxw);
- } else {
- x = 0;
- next_x = pref.width();
- }
- y += maxRowHeight + spacing(Qt::Vertical);
- maxRowHeight = 0;
- }
-
- if (applyNewGeometry)
- item->setGeometry(QRectF(QPointF(left + x, top + y), pref));
- x = next_x + spacing(Qt::Horizontal);
- }
- maxRowHeight = qMax(maxRowHeight, pref.height());
- return top + y + maxRowHeight + bottom;
-}
-
-QSizeF FlowLayout::minSize(const QSizeF &constraint) const
-{
- QSizeF size(0, 0);
- qreal left, top, right, bottom;
- getContentsMargins(&left, &top, &right, &bottom);
- if (constraint.width() >= 0) { // height for width
- const qreal height = doLayout(QRectF(QPointF(0,0), constraint), false);
- size = QSizeF(constraint.width(), height);
- } else if (constraint.height() >= 0) { // width for height?
- // not supported
- } else {
- for (const QGraphicsLayoutItem *item : qAsConst(m_items))
- size = size.expandedTo(item->effectiveSizeHint(Qt::MinimumSize));
- size += QSizeF(left + right, top + bottom);
- }
- return size;
-}
-
-QSizeF FlowLayout::prefSize() const
-{
- qreal left, right;
- getContentsMargins(&left, nullptr, &right, nullptr);
-
- qreal maxh = 0;
- qreal totalWidth = 0;
- for (const QGraphicsLayoutItem *item : qAsConst(m_items)) {
- if (totalWidth > 0)
- totalWidth += spacing(Qt::Horizontal);
- QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize);
- totalWidth += pref.width();
- maxh = qMax(maxh, pref.height());
- }
- maxh += spacing(Qt::Vertical);
-
- const qreal goldenAspectRatio = 1.61803399;
- qreal w = qSqrt(totalWidth * maxh * goldenAspectRatio) + left + right;
-
- return minSize(QSizeF(w, -1));
-}
-
-QSizeF FlowLayout::maxSize() const
-{
- qreal totalWidth = 0;
- qreal totalHeight = 0;
- for (const QGraphicsLayoutItem *item : qAsConst(m_items)) {
- if (totalWidth > 0)
- totalWidth += spacing(Qt::Horizontal);
- if (totalHeight > 0)
- totalHeight += spacing(Qt::Vertical);
- QSizeF pref = item->effectiveSizeHint(Qt::PreferredSize);
- totalWidth += pref.width();
- totalHeight += pref.height();
- }
-
- qreal left, top, right, bottom;
- getContentsMargins(&left, &top, &right, &bottom);
- return QSizeF(left + totalWidth + right, top + totalHeight + bottom);
-}
-
-QSizeF FlowLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
-{
- QSizeF sh = constraint;
- switch (which) {
- case Qt::PreferredSize:
- sh = prefSize();
- break;
- case Qt::MinimumSize:
- sh = minSize(constraint);
- break;
- case Qt::MaximumSize:
- sh = maxSize();
- break;
- default:
- break;
- }
- return sh;
-}