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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt Chart API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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#ifndef LEGENDLAYOUT_H
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#define LEGENDLAYOUT_H
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#include <QtWidgets/QGraphicsLayout>
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#include <QtCharts/QChartGlobal>
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QT_CHARTS_BEGIN_NAMESPACE
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class QLegend;
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class LegendMarkerItem;
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class LegendLayout : public QGraphicsLayout
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{
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public:
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LegendLayout(QLegend *legend);
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virtual ~LegendLayout();
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void setGeometry(const QRectF &rect);
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void setOffset(qreal x, qreal y);
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QPointF offset() const;
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void invalidate();
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protected:
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QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
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int count() const { return 0; }
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QGraphicsLayoutItem *itemAt(int) const { return 0; };
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void removeAt(int) {};
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private:
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void setAttachedGeometry(const QRectF &rect);
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void setDettachedGeometry(const QRectF &rect);
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struct LegendWidthStruct {
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LegendMarkerItem *item;
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qreal width;
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};
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static bool widthLongerThan(const LegendWidthStruct *item1,
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const LegendWidthStruct *item2);
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private:
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QLegend *m_legend;
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qreal m_offsetX;
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qreal m_offsetY;
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qreal m_minOffsetX;
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qreal m_minOffsetY;
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qreal m_maxOffsetX;
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qreal m_maxOffsetY;
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qreal m_width;
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qreal m_height;
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};
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QT_CHARTS_END_NAMESPACE
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#endif
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