- Qt 5.5
- Qt Quick
- Scene Graph - Custom Geometry
- beziercurve.h Example File
- Qt 5.5.1 Reference Documentation

# beziercurve.h Example File

scenegraph/customgeometry/beziercurve.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
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    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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    #ifndef BEZIERCURVE_H
    #define BEZIERCURVE_H

    #include <QtQuick/QQuickItem>

    class BezierCurve : public QQuickItem
    {
        Q_OBJECT

        Q_PROPERTY(QPointF p1 READ p1 WRITE setP1 NOTIFY p1Changed)
        Q_PROPERTY(QPointF p2 READ p2 WRITE setP2 NOTIFY p2Changed)
        Q_PROPERTY(QPointF p3 READ p3 WRITE setP3 NOTIFY p3Changed)
        Q_PROPERTY(QPointF p4 READ p4 WRITE setP4 NOTIFY p4Changed)

        Q_PROPERTY(int segmentCount READ segmentCount WRITE setSegmentCount NOTIFY segmentCountChanged)

    public:
        BezierCurve(QQuickItem *parent = 0);
        ~BezierCurve();

        QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *);

        QPointF p1() const { return m_p1; }
        QPointF p2() const { return m_p2; }
        QPointF p3() const { return m_p3; }
        QPointF p4() const { return m_p4; }

        int segmentCount() const { return m_segmentCount; }

        void setP1(const QPointF &p);
        void setP2(const QPointF &p);
        void setP3(const QPointF &p);
        void setP4(const QPointF &p);

        void setSegmentCount(int count);

    signals:
        void p1Changed(const QPointF &p);
        void p2Changed(const QPointF &p);
        void p3Changed(const QPointF &p);
        void p4Changed(const QPointF &p);

        void segmentCountChanged(int count);

    private:
        QPointF m_p1;
        QPointF m_p2;
        QPointF m_p3;
        QPointF m_p4;

        int m_segmentCount;
    };

    #endif