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3** Copyright (C) 2016 The Qt Company Ltd.
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29
30// W A R N I N G
31// -------------
32//
33// This file is not part of the Qt Chart API. It exists purely as an
34// implementation detail. This header file may change from version to
35// version without notice, or even be removed.
36//
37// We mean it.
38
39#ifndef ABSTRACTCHARTLAYOUT_H
40#define ABSTRACTCHARTLAYOUT_H
41
42#include <QtWidgets/QGraphicsLayout>
43#include <QtCore/QMargins>
44#include <QtCharts/QChartGlobal>
45#include <QtCharts/private/qchartglobal_p.h>
46
47QT_CHARTS_BEGIN_NAMESPACE
48
49class ChartTitle;
50class ChartAxisElement;
51class ChartPresenter;
52class QLegend;
53class ChartBackground;
54
55class Q_CHARTS_PRIVATE_EXPORT AbstractChartLayout : public QGraphicsLayout
56{
57public:
58 AbstractChartLayout(ChartPresenter *presenter);
59 virtual ~AbstractChartLayout();
60
61 virtual void setMargins(const QMargins &margins);
62 virtual QMargins margins() const;
63 virtual void setGeometry(const QRectF &rect);
64
65protected:
66 virtual QRectF calculateBackgroundGeometry(const QRectF &geometry, ChartBackground *background,
67 bool update = true) const;
68 virtual QRectF calculateBackgroundMinimum(const QRectF &minimum) const;
69 virtual QRectF calculateContentGeometry(const QRectF &geometry) const;
70 virtual QRectF calculateContentMinimum(const QRectF &minimum) const;
71 virtual QRectF calculateTitleGeometry(const QRectF &geometry, ChartTitle *title,
72 bool update = true) const;
73 virtual QRectF calculateTitleMinimum(const QRectF &minimum, ChartTitle *title) const;
74 virtual QRectF calculateLegendGeometry(const QRectF &geometry, QLegend *legend,
75 bool update = true) const;
76 virtual QRectF calculateLegendMinimum(const QRectF &minimum, QLegend *legend) const;
77
78 virtual QRectF calculateAxisGeometry(const QRectF &geometry,
79 const QList<ChartAxisElement *>& axes,
80 bool update = true) const = 0;
81 virtual QRectF calculateAxisMinimum(const QRectF &minimum,
82 const QList<ChartAxisElement *>& axes) const = 0;
83
84 // from QGraphicsLayout
85 QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
86 int count() const { return 0; }
87 QGraphicsLayoutItem *itemAt(int) const { return 0; };
88 void removeAt(int) {};
89
90 ChartPresenter *m_presenter;
91 QMargins m_margins;
92 QRectF m_minAxisRect;
93};
94
95QT_CHARTS_END_NAMESPACE
96
97#endif // ABSTRACTCHARTLAYOUT_H
98

source code of qtcharts/src/charts/layout/abstractchartlayout_p.h