RSnap.h

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#ifndef RSNAP_H
#define RSNAP_H
 
#include "core_global.h"
 
#include "RMath.h"
#include "RObject.h"
#include "RVector.h"
 
class RGraphicsView;
class RMouseEvent;
 
class QCADCORE_EXPORT RSnap {
public:
    enum Status {
        Unknown = 0,
        Free = 1,
        Grid = 2,
        Endpoint = 3,
        OnEntity = 4,
        Center = 5,
        Middle = 6,
        Distance = 7,
        Intersection = 8,
        IntersectionManual = 9,
        Reference = 10,
        Perpendicular = 11,
        Tangential = 12,
        Coordinate = 13,
        CoordinatePolar = 14
    };
 
public:
    RSnap(RSnap::Status s = RSnap::Unknown);
    ~RSnap();
 
    virtual RVector snap(
            const RVector& position,
            RGraphicsView& view,
            double range=RNANDOUBLE) {
 
        return RVector::invalid;
    }
 
    virtual RVector snap(RMouseEvent& event);
 
    virtual void showUiOptions() {}
    virtual void hideUiOptions() {}
 
    virtual void suspendEvent() {
        hideUiOptions();
    }
    virtual void finishEvent() {
        hideUiOptions();
    }
 
    QList<RObject::Id> getEntityIds() {
        return entityIds;
    }
 
    RSnap::Status getStatus() const {
        return status;
    }
 
    void setStatus(RSnap::Status s) {
        status = s;
    }
 
    RVector getLastSnap() const {
        return lastSnap;
    }
 
    void setLastSnap(const RVector& v) {
        lastSnap = v;
    }
 
    virtual void reset() {
        entityIds.clear();
        lastSnap = RVector::invalid;
    }
 
protected:
    QList<RObject::Id> entityIds;
    RSnap::Status status;
    RVector lastSnap;
};
 
Q_DECLARE_METATYPE(RSnap*)
Q_DECLARE_METATYPE(RSnap::Status)
 
#endif