maptooleditvertex.h

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#ifndef MAPTOOLEDITVERTEX_H
#define MAPTOOLEDITVERTEX_H
 
#include "map/tools/maptool.h"
 
#include <QPoint>
#include <QPointF>
#include <QString>
#include <QVector>
 
class SWMMModelLayer;
 
class OpenSWMMVisMapToolEditVertex : public OpenSWMMVisMapTool
{
    Q_OBJECT
 
public:
    explicit OpenSWMMVisMapToolEditVertex(MapCanvas *canvas, QObject *parent = nullptr);
 
    [[nodiscard]] QCursor cursor() const override;
 
    void activate() override;
    void deactivate() override;
 
    void mousePressEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;
    void mouseDoubleClickEvent(QMouseEvent *event) override;
    void keyPressEvent(QKeyEvent *event) override;
 
    void paint(QPainter *painter,
               const MapExtent &canvasExtent,
               const SpatialReferenceSystem *canvasSRS) override;
 
signals:
    void verticesEdited(const QString &linkName, int interiorVertexCount);
 
private:
    struct LinkHit {
        SWMMModelLayer *layer = nullptr;
        int   linkIdx = -1;
        QString name;
        bool valid() const { return layer && linkIdx >= 0; }
    };
 
    void    clearActiveLink();
    LinkHit pickLink(const QPoint &pixel) const;
    int     hitTestInteriorHandle(const QPoint &pixel) const;
    void    commitInterior(QVector<QPointF> newInterior);
 
    SWMMModelLayer   *m_layer   = nullptr;
    int               m_linkIdx = -1;
    QString           m_linkName;
 
    // The cached interior vertices for the current link in LAYER coords.
    QVector<QPointF>  m_interior;
 
    // Drag state
    bool              m_dragging    = false;
    int               m_dragVertex  = -1;      // index into m_interior
    QPointF           m_dragOrigPt;            // pre-drag map position of dragged vertex
    int               m_pickTol     = 8;       // pixels for handle hit
 
    // Snap state (set each mouseMoveEvent during drag, cleared on release)
    bool              m_snapping  = false;
    QPointF           m_snapPt;
 
    static constexpr int kSnapRadiusPx = 15;  // pixel radius for snap detection
};
 
#endif // MAPTOOLEDITVERTEX_H