QGCMapPolyline.h

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#pragma once
 
#include <QtCore/QObject>
#include <QtCore/QVariantList>
#include <QtPositioning/QGeoCoordinate>
 
#include "QmlObjectListModel.h"
 
class QGCMapPolyline : public QObject
{
    Q_OBJECT
 
public:
    QGCMapPolyline(QObject* parent = nullptr);
    QGCMapPolyline(const QGCMapPolyline& other, QObject* parent = nullptr);
 
    ~QGCMapPolyline() override;
 
    const QGCMapPolyline& operator=(const QGCMapPolyline& other);
 
    Q_PROPERTY(int                  count       READ count                                  NOTIFY countChanged)
    Q_PROPERTY(QVariantList         path        READ path                                   NOTIFY pathChanged)
    Q_PROPERTY(QVariantList         dragPath    READ path                                   NOTIFY dragPathChanged)
    Q_PROPERTY(QmlObjectListModel*  pathModel   READ qmlPathModel                           CONSTANT)
    Q_PROPERTY(bool                 dirty       READ dirty          WRITE setDirty          NOTIFY dirtyChanged)
    Q_PROPERTY(bool                 interactive READ interactive    WRITE setInteractive    NOTIFY interactiveChanged)
    Q_PROPERTY(bool                 vertexDrag  READ vertexDrag     WRITE setVertexDrag     NOTIFY vertexDragChanged)
    Q_PROPERTY(bool                 isValid     READ isValid                                NOTIFY isValidChanged)
    Q_PROPERTY(bool                 empty       READ empty                                  NOTIFY isEmptyChanged)
    Q_PROPERTY(bool                 traceMode   READ traceMode      WRITE setTraceMode      NOTIFY traceModeChanged)
    Q_PROPERTY(int              selectedVertex  READ selectedVertex WRITE selectVertex      NOTIFY selectedVertexChanged)
 
    Q_INVOKABLE void clear(void);
    Q_INVOKABLE void appendVertex(const QGeoCoordinate& coordinate);
    Q_INVOKABLE void removeVertex(int vertexIndex);
    Q_INVOKABLE void appendVertices(const QList<QGeoCoordinate>& coordinates);
 
    Q_INVOKABLE void adjustVertex(int vertexIndex, const QGeoCoordinate coordinate);
 
    Q_INVOKABLE void splitSegment(int vertexIndex);
 
    QList<QGeoCoordinate> offsetPolyline(double distance);
 
    Q_INVOKABLE bool loadKMLOrSHPFile(const QString &file);
 
    Q_INVOKABLE void beginReset (void);
    Q_INVOKABLE void endReset   (void);
 
    QList<QGeoCoordinate> coordinateList(void) const;
 
    Q_INVOKABLE QGeoCoordinate vertexCoordinate(int vertex) const;
 
    void saveToJson(QJsonObject& json);
 
    bool loadFromJson(const QJsonObject& json, bool required, QString& errorString);
 
    QList<QPointF> nedPolyline(void);
 
    double length(void) const;
 
    // Property methods
    int             count       (void) const { return _polylinePath.count(); }
    bool            dirty       (void) const { return _dirty; }
    void            setDirty    (bool dirty);
    bool            interactive (void) const { return _interactive; }
    bool            vertexDrag  (void) const { return _vertexDrag; }
    QVariantList    path        (void) const { return _polylinePath; }
    bool            isValid     (void) const { return _polylineModel.count() >= 2; }
    bool            empty       (void) const { return _polylineModel.count() == 0; }
    bool            traceMode   (void) const { return _traceMode; }
    int             selectedVertex()   const { return _selectedVertexIndex; }
 
    QmlObjectListModel* qmlPathModel(void) { return &_polylineModel; }
    QmlObjectListModel& pathModel   (void) { return _polylineModel; }
 
    void setPath        (const QList<QGeoCoordinate>& path);
    void setPath        (const QVariantList& path);
    void setInteractive (bool interactive);
    void setVertexDrag  (bool vertexDrag);
    void setTraceMode   (bool traceMode);
    void selectVertex   (int index);
 
    static constexpr const char* jsonPolylineKey = "polyline";
 
signals:
    void countChanged       (int count);
    void pathChanged        (void);
    void dragPathChanged    (void);
    void dirtyChanged       (bool dirty);
    void cleared            (void);
    void interactiveChanged (bool interactive);
    void vertexDragChanged  (bool vertexDrag);
    void isValidChanged     (void);
    void isEmptyChanged     (void);
    void traceModeChanged   (bool traceMode);
    void selectedVertexChanged(int index);
 
private slots:
    void _polylineModelCountChanged(int count);
    void _polylineModelDirtyChanged(bool dirty);
 
private:
    void            _init                   (void);
    QGeoCoordinate  _coordFromPointF        (const QPointF& point) const;
    QPointF         _pointFFromCoord        (const QGeoCoordinate& coordinate) const;
 
    QVariantList        _polylinePath;
    QmlObjectListModel  _polylineModel;
    bool                _deferredPathChanged = false;
    bool                _dirty;
    bool                _interactive;
    bool                _vertexDrag = false;
    bool                _traceMode = false;
    int                 _selectedVertexIndex = -1;
};