edit_points.h

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/*
 * This program source code file is part of KICAD, a free EDA CAD application.
 *
 * Copyright (C) 2014-2017 CERN
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Maciej Suminski <[email protected]>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#ifndef EDIT_POINTS_H_
#define EDIT_POINTS_H_
 
#include <eda_item.h>
#include <layer_ids.h>
 
#include <list>
#include <deque>
#include <memory>
 
#include "edit_relations.h"
#include <view/view.h>
 

class EDIT_POINT
{
public:
    EDIT_POINT( const VECTOR2I& aPoint, std::pair<EDA_ITEM*, int> aConnected = { nullptr, 0 } ) :
            m_position( aPoint ),
            m_isActive( false ),
            m_isHover( false ),
            m_drawCircle( false ),
            m_gridConstraint( SNAP_TO_GRID ),
            m_snapConstraint( OBJECT_LAYERS ),
            m_connected( aConnected )
    {
    }
 
    virtual ~EDIT_POINT() {}

    virtual VECTOR2I GetPosition() const
    {
        return m_position;
    }

    virtual std::pair<EDA_ITEM*, int> GetConnected() const
    {
        return m_connected;
    }

    inline int GetX() const
    {
        return GetPosition().x;
    }

    inline int GetY() const
    {
        return GetPosition().y;
    }

    virtual void SetPosition( const VECTOR2I& aPosition )
    {
        m_position = aPosition;
    }
 
    virtual void SetPosition( int x, int y )
    {
        m_position.x = x;
        m_position.y = y;
    }

    bool WithinPoint( const VECTOR2I& aPoint, unsigned int aSize ) const;

    void SetRelation( std::unique_ptr<EDIT_RELATION> aRelation )
    {
        m_relation = std::move( aRelation );
    }

    EDIT_RELATION* GetRelation() const
    {
        return m_relation.get();
    }

    virtual bool IsConstrained() const
    {
        return m_relation != nullptr;
    }

    virtual void ApplyRelation( const GRID_HELPER& aGrid )
    {
        if( m_relation )
            m_relation->Apply( *this, aGrid );
    }
 
    bool IsActive() const { return m_isActive; }
    void SetActive( bool aActive = true ) { m_isActive = aActive; }
 
    bool IsHover() const { return m_isHover; }
    void SetHover( bool aHover = true ) { m_isHover = aHover; }
 
    bool DrawCircle() const { return m_drawCircle; }
    void SetDrawCircle( bool aDrawCircle = true ) { m_drawCircle = aDrawCircle; }
 
    GRID_CONSTRAINT_TYPE GetGridConstraint() const { return m_gridConstraint; }
    void SetGridConstraint( GRID_CONSTRAINT_TYPE aConstraint ) { m_gridConstraint = aConstraint; }
 
    SNAP_CONSTRAINT_TYPE GetSnapConstraint() const { return m_snapConstraint; }
    void SetSnapConstraint( SNAP_CONSTRAINT_TYPE aConstraint ) { m_snapConstraint = aConstraint; }
 
    bool operator==( const EDIT_POINT& aOther ) const
    {
        return m_position == aOther.m_position;
    }

    static const int POINT_SIZE = 8;
 
#ifdef __WXMAC__
    static const int BORDER_SIZE = 3;       
    static const int HOVER_SIZE  = 6;       
#else
    static const int BORDER_SIZE = 2;       
    static const int HOVER_SIZE  = 5;       
#endif
 
private:
    VECTOR2I             m_position;        
    bool                 m_isActive;        
    bool                 m_isHover;         
    bool                 m_drawCircle;      
    GRID_CONSTRAINT_TYPE m_gridConstraint;  
    SNAP_CONSTRAINT_TYPE m_snapConstraint;  

    std::pair<EDA_ITEM*, int>                     m_connected;

    std::shared_ptr<EDIT_RELATION> m_relation;
};
 

class EDIT_LINE : public EDIT_POINT
{
public:
    EDIT_LINE( EDIT_POINT& aOrigin, EDIT_POINT& aEnd ) :
            EDIT_POINT( aOrigin.GetPosition()
                        + ( aEnd.GetPosition() / 2 - aOrigin.GetPosition() / 2 ) ),
            m_origin( aOrigin ), m_end( aEnd )
    {
        SetGridConstraint( SNAP_BY_GRID );
    }

    virtual VECTOR2I GetPosition() const override
    {
        return m_origin.GetPosition() / 2 + m_end.GetPosition() / 2;
    }

    virtual void SetPosition( const VECTOR2I& aPosition ) override
    {
        VECTOR2I difference = aPosition - GetPosition();
 
        m_origin.SetPosition( m_origin.GetPosition() + difference );
        m_end.SetPosition( m_end.GetPosition() + difference );
    }

    virtual void ApplyRelation( const GRID_HELPER& aGrid ) override
    {
        if( m_dragPolicy )
            m_dragPolicy->Apply( *this, aGrid );
 
        if( m_relation )
            m_relation->Apply( *this, aGrid );
 
        m_origin.ApplyRelation( aGrid );
        m_end.ApplyRelation( aGrid );
    }

    void SetRelation( std::unique_ptr<EDIT_RELATION> aRelation )
    {
        m_relation = std::move( aRelation );
    }

    EDIT_RELATION* GetRelation() const
    {
        return m_relation.get();
    }
 
    void SetDragPolicy( std::unique_ptr<POLYGON_EDGE_DRAG_POLICY> aPolicy )
    {
        m_dragPolicy = std::move( aPolicy );
    }
 
    POLYGON_EDGE_DRAG_POLICY* GetDragPolicy() const { return m_dragPolicy.get(); }

    bool IsConstrained() const override
    {
        return m_relation != nullptr || m_dragPolicy != nullptr;
    }

    EDIT_POINT& GetOrigin()
    {
        return m_origin;
    }
 
    const EDIT_POINT& GetOrigin() const
    {
        return m_origin;
    }

    EDIT_POINT& GetEnd()
    {
        return m_end;
    }
 
    const EDIT_POINT& GetEnd() const
    {
        return m_end;
    }

    bool HasCenterPoint() const { return m_hasCenterPoint; }

    void SetHasCenterPoint( bool aHasCenterPoint ) { m_hasCenterPoint = aHasCenterPoint; }

    bool DrawLine() const { return m_showLine; }

    void SetDrawLine( bool aShowLine ) { m_showLine = aShowLine; }
 
    bool operator==( const EDIT_POINT& aOther ) const
    {
        return GetPosition() == aOther.GetPosition();
    }
 
    bool operator==( const EDIT_LINE& aOther ) const
    {
        return m_origin == aOther.m_origin && m_end == aOther.m_end;
    }
 
private:
    EDIT_POINT& m_origin;           
    EDIT_POINT& m_end;              
 
    bool m_hasCenterPoint = true; 
    bool m_showLine = false;      

    std::shared_ptr<EDIT_RELATION>            m_relation;
    std::shared_ptr<POLYGON_EDGE_DRAG_POLICY> m_dragPolicy;
};
 

class EDIT_POINTS : public EDA_ITEM
{
public:
    EDIT_POINTS( EDA_ITEM* aParent );

    EDIT_POINT* FindPoint( const VECTOR2I& aLocation, KIGFX::VIEW *aView );

    EDA_ITEM* GetParent() const
    {
        return m_parent;
    }

    void Clear()
    {
        m_points.clear();
        m_lines.clear();
        m_contours.clear();
    }

    void AddPoint( const EDIT_POINT& aPoint )
    {
        m_points.push_back( aPoint );
    }

    void AddPoint( const VECTOR2I& aPoint, std::pair<EDA_ITEM*, int> aConnected = { nullptr, 0 } )
    {
        AddPoint( EDIT_POINT( aPoint, aConnected ) );
    }

    void AddLine( const EDIT_LINE& aLine )
    {
        m_lines.push_back( aLine );
    }

    void AddLine( EDIT_POINT& aOrigin, EDIT_POINT& aEnd )
    {
        m_lines.emplace_back( aOrigin, aEnd );
    }

    void AddIndicatorLine( EDIT_POINT& aOrigin, EDIT_POINT& aEnd )
    {
        EDIT_LINE& line = m_lines.emplace_back( aOrigin, aEnd );
        line.SetHasCenterPoint( false );
        line.SetDrawLine( true );
    }
 

    void AddBreak()
    {
        assert( m_points.size() > 0 );
        m_contours.push_back( m_points.size() - 1 );
    }

    int GetContourStartIdx( int aPointIdx ) const;

    int GetContourEndIdx( int aPointIdx ) const;

    bool IsContourStart( int aPointIdx ) const;

    bool IsContourEnd( int aPointIdx ) const;

    EDIT_POINT* Previous( const EDIT_POINT& aPoint, bool aTraverseContours = true );
 
    EDIT_LINE* Previous( const EDIT_LINE& aLine );

    EDIT_POINT* Next( const EDIT_POINT& aPoint, bool aTraverseContours = true );
 
    EDIT_LINE* Next( const EDIT_LINE& aLine );
 
    EDIT_POINT& Point( unsigned int aIndex )
    {
        return m_points[aIndex];
    }
 
    const EDIT_POINT& Point( unsigned int aIndex ) const
    {
        return m_points[aIndex];
    }
 
    EDIT_LINE& Line( unsigned int aIndex )
    {
        return m_lines[aIndex];
    }
 
    const EDIT_LINE& Line( unsigned int aIndex ) const
    {
        return m_lines[aIndex];
    }

    unsigned int PointsSize() const
    {
        return m_points.size();
    }

    unsigned int LinesSize() const
    {
        return m_lines.size();
    }

    virtual const BOX2I ViewBBox() const override;

    virtual void ViewDraw( int aLayer, KIGFX::VIEW* aView ) const override;

    virtual std::vector<int> ViewGetLayers() const override
    {
        return { LAYER_GP_OVERLAY };
    }
 
#if defined(DEBUG)
    void Show( int x, std::ostream& st ) const override
    {
    }
#endif

    virtual wxString GetClass() const override
    {
        return wxT( "EDIT_POINTS" );
    }
 
    bool SwapX() const             { return m_swapX; }
    void SetSwapX( bool aSwap )    { m_swapX = aSwap; }
 
    bool SwapY() const             { return m_swapY; }
    void SetSwapY( bool aSwap )    { m_swapY = aSwap; }
 
private:
    EDA_ITEM*              m_parent;       
    bool                   m_swapX;        
    bool                   m_swapY;        
    std::deque<EDIT_POINT> m_points;       
    std::deque<EDIT_LINE>  m_lines;        
    std::list<int>         m_contours;     
    bool                   m_allowPoints;  
};
 
#endif /* EDIT_POINTS_H_ */