MRAncillaryLabels.h

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#pragma once
#ifndef MRMESH_NO_LABEL
 
#include "exports.h"
#include "MRMesh/MRMeshFwd.h"
#include "MRMesh/MRVector2.h"
#include "MRMesh/MRPositionedText.h"
#include "MRViewerEventsListener.h"
#include "MRImGuiMeasurementIndicators.h"
#include <memory>
#include <optional>
 
namespace MR
{
 
class Object;
class ObjectLabel;
struct PositionedText;

struct MRVIEWER_CLASS AncillaryLabel
{
    std::shared_ptr<ObjectLabel> obj;
 
    AncillaryLabel() = default;

    AncillaryLabel( AncillaryLabel && b ) noexcept = default;
    AncillaryLabel & operator =( AncillaryLabel && b ) { reset(); obj = std::move( b.obj ); return *this; }

    explicit AncillaryLabel( Object& parent, const PositionedText& text, bool depthTest = false )
        { make( parent, text, depthTest ); }

    MRVIEWER_API void make( Object& parent, const PositionedText& text, bool depthTest = false );

    static MRVIEWER_API std::shared_ptr<ObjectLabel> makeDetached(
        const PositionedText& text, bool depthTest = false );

    MRVIEWER_API void reset();

    ~AncillaryLabel() { reset(); }

    MRVIEWER_API void setText( const PositionedText& text );

    MRVIEWER_API void resetText();

    MRVIEWER_API void setDepthTest( bool depthTest );

    MRVIEWER_API void setPosition( const Vector3f& pos );
};

class MRVIEWER_CLASS AncillaryImGuiLabel : public PreDrawListener
{
public:
    AncillaryImGuiLabel() = default;

    MRVIEWER_API void make( Object &parent, const PositionedText& text );

    MRVIEWER_API void make( std::shared_ptr<Object> parent, const PositionedText& text );

    MRVIEWER_API void make( const PositionedText& text );

    MRVIEWER_API void reset();

    Vector2f getPivot() const { return pivot_; }
    void setPivot( Vector2f pivot ) { pivot_ = pivot; }

    MRVIEWER_API void overrideParams( const ImGuiMeasurementIndicators::Params& params );

    MRVIEWER_API void resetOverrideParams();
private:
    MRVIEWER_API virtual void preDraw_() override;
 
    std::weak_ptr<Object> parent_;
    Vector2f pivot_ = { 0.5f, 0.5f };
    Vector3f localPos_;
    PositionedText labelData_;
    std::optional<ImGuiMeasurementIndicators::Params> overrideParams_;
    boost::signals2::scoped_connection parentXfConnection_;
};
 
 
}
 
#endif