| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
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| 3 | |
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| 4 | // W A R N I N G |
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| 5 | // ------------- |
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| 6 | // |
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| 7 | // This file is not part of the Qt Chart API. It exists purely as an |
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| 8 | // implementation detail. This header file may change from version to |
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| 9 | // version without notice, or even be removed. |
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| 10 | // |
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| 11 | // We mean it. |
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| 12 | |
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| 13 | #ifndef LEGENDLAYOUT_H |
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| 14 | #define LEGENDLAYOUT_H |
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| 15 | #include <QtWidgets/QGraphicsLayout> |
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| 16 | #include <QtCharts/QChartGlobal> |
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| 17 | #include <QtCharts/private/qchartglobal_p.h> |
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| 18 | |
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| 19 | QT_BEGIN_NAMESPACE |
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| 20 | |
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| 21 | class QLegend; |
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| 22 | class LegendMarkerItem; |
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| 23 | |
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| 24 | class Q_CHARTS_EXPORT LegendLayout : public QGraphicsLayout |
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| 25 | { |
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| 26 | public: |
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| 27 | |
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| 28 | LegendLayout(QLegend *legend); |
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| 29 | virtual ~LegendLayout(); |
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| 30 | |
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| 31 | void setGeometry(const QRectF &rect) override; |
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| 32 | |
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| 33 | void setOffset(qreal x, qreal y); |
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| 34 | QPointF offset() const; |
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| 35 | |
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| 36 | void invalidate() override; |
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| 37 | protected: |
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| 38 | QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const override; |
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| 39 | int count() const override { return 0; } |
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| 40 | QGraphicsLayoutItem *itemAt(int) const override { return 0; }; |
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| 41 | void removeAt(int) override {}; |
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| 42 | |
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| 43 | private: |
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| 44 | void setAttachedGeometry(const QRectF &rect); |
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| 45 | void setDettachedGeometry(const QRectF &rect); |
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| 46 | |
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| 47 | struct LegendWidthStruct { |
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| 48 | LegendMarkerItem *item; |
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| 49 | qreal width; |
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| 50 | }; |
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| 51 | static bool widthLongerThan(const LegendWidthStruct *item1, |
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| 52 | const LegendWidthStruct *item2); |
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| 53 | |
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| 54 | private: |
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| 55 | QLegend *m_legend; |
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| 56 | qreal m_offsetX; |
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| 57 | qreal m_offsetY; |
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| 58 | qreal m_minOffsetX; |
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| 59 | qreal m_minOffsetY; |
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| 60 | qreal m_maxOffsetX; |
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| 61 | qreal m_maxOffsetY; |
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| 62 | qreal m_width; |
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| 63 | qreal m_height; |
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| 64 | }; |
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| 65 | |
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| 66 | QT_END_NAMESPACE |
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| 67 | |
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| 68 | #endif |
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| 69 | |
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