- Qt 5.3
- Qt Quick
- Scene Graph - Custom Geometry
- beziercurve.h Example File
- Qt 5.3.2 Reference Documentation

# beziercurve.h Example File

scenegraph/customgeometry/beziercurve.h

    /****************************************************************************
    **
    ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
    ** Software or, alternatively, in accordance with the terms contained in
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    ** use the contact form at http://qt.digia.com/contact-us.
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.LGPL included in the
    ** packaging of this file.  Please review the following information to
    ** ensure the GNU Lesser General Public License version 2.1 requirements
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    ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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    ** GNU General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU
    ** General Public License version 3.0 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file.  Please review the following information to
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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