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2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
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6** This file is part of the Qt Charts module of the Qt Toolkit.
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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 CHARTTHEMEMANAGER_H
40#define CHARTTHEMEMANAGER_H
41
42#include <QtCharts/QChartGlobal>
43#include <QtCharts/QChart>
44#include <QtGui/QColor>
45#include <QtGui/QGradientStops>
46#include <QtCharts/private/qchartglobal_p.h>
47
48QT_CHARTS_BEGIN_NAMESPACE
49class ChartTheme;
50
51class Q_CHARTS_PRIVATE_EXPORT ChartThemeManager: public QObject
52{
53 Q_OBJECT
54public:
55 enum BackgroundShadesMode {
56 BackgroundShadesNone = 0,
57 BackgroundShadesVertical,
58 BackgroundShadesHorizontal,
59 BackgroundShadesBoth
60 };
61
62public:
63 explicit ChartThemeManager(QChart* chart);
64 void setTheme(QChart::ChartTheme theme);
65 ChartTheme* theme() const { return m_theme.data(); }
66 void decorateChart(QChart *chart, ChartTheme* theme) const;
67 void decorateLegend(QLegend *legend, ChartTheme* theme) const;
68 void updateSeries(QAbstractSeries *series);
69 QMap<QAbstractSeries *, int> seriesMap() const { return m_seriesMap; }
70
71public:
72 static QList<QGradient> generateSeriesGradients(const QList<QColor>& colors);
73 static QColor colorAt(const QColor &start, const QColor &end, qreal pos);
74 static QColor colorAt(const QGradient &gradient, qreal pos);
75
76private:
77 int createIndexKey(QList<int> keys) const;
78 int seriesCount(QAbstractSeries::SeriesType type) const;
79
80public Q_SLOTS:
81 void handleSeriesAdded(QAbstractSeries *series);
82 void handleSeriesRemoved(QAbstractSeries *series);
83 void handleAxisAdded(QAbstractAxis *axis);
84 void handleAxisRemoved(QAbstractAxis *axis);
85
86protected:
87 QScopedPointer<ChartTheme> m_theme;
88 QMap<QAbstractSeries *,int> m_seriesMap;
89 QList<QAbstractAxis *> m_axisList;
90 QChart* m_chart;
91};
92
93QT_CHARTS_END_NAMESPACE
94
95#endif // CHARTTHEME_H
96

source code of qtcharts/src/charts/chartthememanager_p.h