VRS - The Virtual Rendering System

version 3.3

transformeditor.h

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//******************************************************************************
//* LDX - The LandXplorer System
//* Copyright (C) 2002-2005 Computer Graphics Systems Group at the 
//* Hasso-Plattner-Institute, Potsdam, Germany.
//* Copyright (C) 2004-2005 3D-Geo GmbH, Schwielowsee, Germany.
//******************************************************************************


#ifndef VRS_SG_TRANSFORMEDITOR_H
#define VRS_SG_TRANSFORMEDITOR_H

#include <vrs/bounds.h>
#include <vrs/sg/interactiontechnique.h>

namespace VRS {

    class SceneThing;
    class MappedVertexAttributeShapeGL;
    class Tf;

    class VRS_CORE_API TransformEditor :
        public InteractionTechnique
    {
    public:        
                        
        TransformEditor();        

        void start(SO<SceneThing> target);

        void end(); 

        static const MouseButtonFunctionID HorizontalShiftButton;
        static const MouseButtonFunctionID VerticalShiftButton;
        static const MouseButtonFunctionID RotationButton;
        static const MouseButtonFunctionID ScalingButton;
                                
        virtual void onDragStart(int x, int y, SO<ButtonEvent>, MouseButtonFunctionID id);
        virtual void onDragMotion(
            int x, int y, 
            SO<MotionEvent>, 
            MouseButtonFunctionID id,         
            int startX, int startY
        );
        virtual void onDragEnd(
            int x, int y,
            SO<ButtonEvent>,
            MouseButtonFunctionID id,         
            int startX, int startY
        );

        SO<SceneThing> getGhostCopyScene() const;

        SO<Tf> getTransform() const;

        void setRotationSensitivity(double degreesPerPixel = 0.3);
        double getRotationSensitivity() const;
        
        VRS_TYPEINFO(TransformEditor, InteractionTechnique);


        static SO<SceneThing> createGhostCopyScene(SO<SceneThing> scene, SO<MappedVertexAttributeShapeGL>& shape);

    private:
        Vector m_dragPoint; 
        bool m_dragging;    
        SO<SceneThing> m_ghostCopyScene;
        SO<Tf> m_currentTf;
        SO<Canvas> m_canvas; // temporarily stored during drag events
        SO<MappedVertexAttributeShapeGL> m_ghostCopyShape;
          
        Matrix m_dragStartMatrix; // temporarily used during dragging to avoid error accumulation (for scaling/rotation)
        double m_degreesPerPixel;

        MouseButtonFunctionID m_currentOperation;
        
    }; // class TransformEditor

} // namespace VRS

#endif // VRS_SG_TRANSFORMEDITOR_H

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