qt-everywhere-src-5.14.1/qtlocation/src/location/declarativemaps/qdeclarativecirclemapitem_p.h

/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later 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
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QDECLARATIVECIRCLEMAPITEM_H
#define QDECLARATIVECIRCLEMAPITEM_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtLocation/private/qlocationglobal_p.h>
#include <QtLocation/private/qdeclarativegeomapitembase_p.h>
#include <QtLocation/private/qdeclarativepolylinemapitem_p.h>
#include <QtLocation/private/qdeclarativepolygonmapitem_p.h>
#include <QSGGeometryNode>
#include <QSGFlatColorMaterial>
#include <QtPositioning/QGeoCircle>

QT_BEGIN_NAMESPACE

class Q_LOCATION_PRIVATE_EXPORT QGeoMapCircleGeometry : public QGeoMapPolygonGeometry
{
public:
    QGeoMapCircleGeometry();

    void updateScreenPointsInvert(const QList<QDoubleVector2D> &circlePath, const QGeoMap &map);
};

class Q_LOCATION_PRIVATE_EXPORT QDeclarativeCircleMapItem : public QDeclarativeGeoMapItemBase
{
    Q_OBJECT
    Q_PROPERTY(QGeoCoordinate center READ center WRITE setCenter NOTIFY centerChanged)
    Q_PROPERTY(qreal radius READ radius WRITE setRadius NOTIFY radiusChanged)
    Q_PROPERTY(QColor color READ color WRITE setColor NOTIFY colorChanged)
    Q_PROPERTY(QDeclarativeMapLineProperties *border READ border CONSTANT)

public:
    explicit QDeclarativeCircleMapItem(QQuickItem *parent = 0);
    ~QDeclarativeCircleMapItem();

    virtual void setMap(QDeclarativeGeoMap *quickMap, QGeoMap *map) override;
    virtual QSGNode *updateMapItemPaintNode(QSGNode *, UpdatePaintNodeData *) override;

    QGeoCoordinate center();
    void setCenter(const QGeoCoordinate &center);

    qreal radius() const;
    void setRadius(qreal radius);

    QColor color() const;
    void setColor(const QColor &color);

    QDeclarativeMapLineProperties *border();

    bool contains(const QPointF &point) const override;
    const QGeoShape &geoShape() const override;
    void setGeoShape(const QGeoShape &shape) override;

    static bool crossEarthPole(const QGeoCoordinate &center, qreal distance);
    static void calculatePeripheralPoints(QList<QGeoCoordinate> &path, const QGeoCoordinate &center,
                                   qreal distance, int steps, QGeoCoordinate &leftBound);
    static bool preserveCircleGeometry(QList<QDoubleVector2D> &path, const QGeoCoordinate &center,
                                qreal distance, const QGeoProjectionWebMercator &p);
    static void updateCirclePathForRendering(QList<QDoubleVector2D> &path, const QGeoCoordinate &center,
                                      qreal distance, const QGeoProjectionWebMercator &p);

Q_SIGNALS:
    void centerChanged(const QGeoCoordinate &center);
    void radiusChanged(qreal radius);
    void colorChanged(const QColor &color);

protected:
    void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) override;
    void updatePolish() override;

protected Q_SLOTS:
    void markSourceDirtyAndUpdate();
    virtual void afterViewportChanged(const QGeoMapViewportChangeEvent &event) override;

private:
    void updateCirclePath();

private:
    QGeoCircle circle_;
    QDeclarativeMapLineProperties border_;
    QColor color_;
    QList<QDoubleVector2D> circlePath_;
    QGeoCoordinate leftBound_;
    bool dirtyMaterial_;
    QGeoMapCircleGeometry geometry_;
    QGeoMapPolylineGeometry borderGeometry_;
    bool updatingGeometry_;
};

//////////////////////////////////////////////////////////////////////

QT_END_NAMESPACE

QML_DECLARE_TYPE(QDeclarativeCircleMapItem)

#endif /* QDECLARATIVECIRCLEMAPITEM_H */