kqtquickcharts/src/xychartbackgroundpainter.h

0001 /*
0002  *  Copyright 2015  Jesper Hellesø Hansen <jesperhh@gmail.com>
0003  *
0004  *  This library is free software; you can redistribute it and/or
0005  *  modify it under the terms of the GNU Lesser General Public
0006  *  License as published by the Free Software Foundation; either
0007  *  version 2.1 of the License, or (at your option) version 3, or any
0008  *  later version accepted by the membership of KDE e.V. (or its
0009  *  successor approved by the membership of KDE e.V.), which shall
0010  *  act as a proxy defined in Section 6 of version 3 of the license.
0011  *
0012  *  This library is distributed in the hope that it will be useful,
0013  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
0014  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0015  *  Lesser General Public License for more details.
0016  *
0017  *  You should have received a copy of the GNU Lesser General Public
0018  */
0019
0020 #ifndef XYCHARTBACKGROUNDPAINTER_H
0021 #define XYCHARTBACKGROUNDPAINTER_H
0022
0023 #include <QQuickPaintedItem>
0024
0025 #include <QPolygonF>
0026
0027 class XYChartCore;
0028
0029 class XYChartBackgroundPainter : public QQuickPaintedItem
0030 {
0031     Q_OBJECT
0032     Q_PROPERTY(XYChartCore* xyChartCore READ xyChartCore WRITE setXYChartCore NOTIFY xyChartCoreChanged)
0033 public:
0034     explicit XYChartBackgroundPainter(QQuickItem* parent = nullptr);
0035     XYChartCore* xyChartCore() const;
0036     void setXYChartCore(XYChartCore* lineChartCore);
0037     void paint(QPainter* painter) override;
0038     const QList<QPolygonF>& linePolygons() const;
0039 Q_SIGNALS:
0040     void xyChartCoreChanged();
0041     void linePolygonsUpdated();
0042 private Q_SLOTS:
0043     void triggerUpdate();
0044 private:
0045     void updateLinePolygons();
0046     XYChartCore* m_xyChartCore;
0047     QList<QPolygonF> m_linePolygons;
0048 };
0049
0050 #endif // XYCHARTBACKGROUNDPAINTER_H