annotationlayer.h

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#ifndef OPENSWMMVIS_LAYERS_ANNOTATIONLAYER_H
#define OPENSWMMVIS_LAYERS_ANNOTATIONLAYER_H
 
#include "layers/openswmmvislayer.h"
 
#include <QHash>
#include <QJsonArray>
#include <QString>
#include <QVector>
 
class AnnotationTextItem;
class AnnotationGraphicsItem;
 
class OpenSWMMVisAnnotationLayer : public OpenSWMMVisLayer
{
    Q_OBJECT
public:
    explicit OpenSWMMVisAnnotationLayer(const QString &name = QStringLiteral("Annotations"),
                                        OpenSWMMVisWorkspace *parent = nullptr);
    ~OpenSWMMVisAnnotationLayer() override;
 
    // ----- Annotation management -----------------------------------------
 
    bool addAnnotation(AnnotationTextItem *item);
 
    bool removeAnnotation(const QString &id);
 
    AnnotationTextItem *takeAnnotation(const QString &id);
 
    [[nodiscard]] AnnotationTextItem *annotation(const QString &id) const;
 
    [[nodiscard]] QVector<AnnotationTextItem *> annotations() const { return m_items; }
 
    [[nodiscard]] AnnotationTextItem *annotationAtScenePos(const QPointF &scenePos) const;
 
    // ----- Persistence ----------------------------------------------------
 
    [[nodiscard]] QJsonArray toJson() const;
    void fromJson(const QJsonArray &arr);
 
    // ----- OpenSWMMVisLayer overrides -------------------------------------
 
    [[nodiscard]] QString sourceDescription() const override { return tr("(in-memory)"); }
    [[nodiscard]] QVector<QPair<QString, QString>> extendedMetadata() const override
    { return {{ tr("Annotations"), QString::number(m_items.size()) }}; }
 
    void populateScene(QGraphicsScene *scene,
                       const MapExtent &canvasExtent,
                       const SpatialReferenceSystem *canvasSRS) override;
    void depopulateScene(QGraphicsScene *scene) override;
    void refreshScene(QGraphicsScene *scene,
                      const MapExtent &canvasExtent,
                      const SpatialReferenceSystem *canvasSRS) override;
    void onCanvasCRSChanged(const SpatialReferenceSystem *newCanvasSRS) override;
 
private slots:
    void onItemPositionChanged();
 
    void onItemChanged();
 
private:
    QPointF toCanvas(double x, double y) const;
 
    void buildGraphicsItem(AnnotationTextItem *item);
 
    QVector<AnnotationTextItem *>                m_items;       
    QHash<QString, AnnotationGraphicsItem *>     m_graphics;    
    QGraphicsScene                              *m_scene = nullptr;
    const SpatialReferenceSystem                *m_canvasSRS = nullptr;
};
 
#endif // OPENSWMMVIS_LAYERS_ANNOTATIONLAYER_H