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diff --git a/include/class_board_item.h b/include/class_board_item.h
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+/*
+ * This program source code file is part of KiCad, a free EDA CAD application.
+ *
+ * Copyright (C) 2004 Jean-Pierre Charras, jaen-pierre.charras@gipsa-lab.inpg.com
+ * Copyright (C) 1992-2011 KiCad Developers, see AUTHORS.txt for contributors.
+ *
+ * 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, you may find one here:
+ * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+ * or you may search the http://www.gnu.org website for the version 2 license,
+ * or you may write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ */
+
+/**
+ * @file  class_board_item.h
+ * @brief Classes BOARD_ITEM and BOARD_CONNECTED_ITEM.
+ */
+
+#ifndef BOARD_ITEM_STRUCT_H
+#define BOARD_ITEM_STRUCT_H
+
+
+#include <base_struct.h>
+#include <gr_basic.h>
+#include <layers_id_colors_and_visibility.h>
+
+/// Abbrevation for fomatting internal units to a string.
+#define FMT_IU     BOARD_ITEM::FormatInternalUnits
+#define FMT_ANGLE  BOARD_ITEM::FormatAngle
+
+class BOARD;
+class EDA_DRAW_PANEL;
+
+
+/**
+ * Enum STROKE_T
+ * is the set of shapes for segments (graphic segments and tracks) which are often
+ * in the .m_Shape member
+ */
+enum STROKE_T
+{
+    S_SEGMENT = 0,  ///< usual segment : line with rounded ends
+    S_RECT,         ///< segment with non rounded ends
+    S_ARC,          ///< Arcs (with rounded ends)
+    S_CIRCLE,       ///< ring
+    S_POLYGON,      ///< polygon (not yet used for tracks, but could be in microwave apps)
+    S_CURVE,        ///< Bezier Curve
+    S_LAST          ///< last value for this list
+};
+
+
+/**
+ * Class BOARD_ITEM
+ * is a base class for any item which can be embedded within the BOARD
+ * container class, and therefore instances of derived classes should only be
+ * found in Pcbnew or other programs that use class BOARD and its contents.
+ * The corresponding class in Eeschema is SCH_ITEM.
+ */
+class BOARD_ITEM : public EDA_ITEM
+{
+    // These are made private here so they may not be used.
+    // Instead everything derived from BOARD_ITEM is handled via DLIST<>'s
+    // use of DHEAD's member functions.
+    void SetNext( EDA_ITEM* aNext )       { Pnext = aNext; }
+    void SetBack( EDA_ITEM* aBack )       { Pback = aBack; }
+
+protected:
+    LAYER_ID    m_Layer;
+
+    static int getTrailingInt( wxString aStr );
+    static int getNextNumberInSequence( std::set<int> aSeq, bool aFillSequenceGaps );
+
+public:
+
+    BOARD_ITEM( BOARD_ITEM* aParent, KICAD_T idtype ) :
+        EDA_ITEM( aParent, idtype ), m_Layer( F_Cu )
+    {
+    }
+
+    // Do not create a copy constructor.  The one generated by the compiler is adequate.
+
+    virtual const wxPoint& GetPosition() const = 0;
+
+    /**
+     * Function GetCenter()
+     *
+     * This defaults to the same point as returned by GetPosition(), unless
+     * overridden
+     *
+     * @return centre point of the item
+     */
+    virtual const wxPoint GetCenter() const { return GetPosition(); }
+
+    virtual void SetPosition( const wxPoint& aPos ) = 0;
+
+    /**
+     * Function IsConnected()
+     * Returns information if the object is derived from BOARD_CONNECTED_ITEM.
+     * @return True if the object is of BOARD_CONNECTED_ITEM type, false otherwise.
+     */
+    virtual bool IsConnected() const
+    {
+        return false;
+    }
+
+    /**
+     * A value of wxPoint(0,0) which can be passed to the Draw() functions.
+     */
+    static wxPoint ZeroOffset;
+
+    BOARD_ITEM* Next() const { return static_cast<BOARD_ITEM*>( Pnext ); }
+    BOARD_ITEM* Back() const { return static_cast<BOARD_ITEM*>( Pback ); }
+    BOARD_ITEM* GetParent() const { return (BOARD_ITEM*) m_Parent; }
+
+    /**
+     * Function GetLayer
+     * returns the primary layer this item is on.
+     */
+    LAYER_ID GetLayer() const { return m_Layer; }
+
+    /**
+     * Function GetLayerSet
+     * returns a "layer mask", which is a bitmap of all layers on which the
+     * TRACK segment or VIA physically resides.
+     * @return int - a layer mask, see layers_id_colors_visibility.h.
+     */
+    virtual LSET GetLayerSet() const { return LSET( m_Layer ); }
+
+    /**
+     * Function SetLayer
+     * sets the layer this item is on.
+     * @param aLayer The layer number.
+     * is virtual because some items (in fact: class DIMENSION)
+     * have a slightly different initialization
+     */
+    virtual void SetLayer( LAYER_ID aLayer )
+    {
+        // trap any invalid layers, then go find the caller and fix it.
+        // wxASSERT( unsigned( aLayer ) < unsigned( NB_PCB_LAYERS ) );
+        m_Layer = aLayer;
+    }
+
+    /**
+     * Function Draw
+     * BOARD_ITEMs have their own color information.
+     */
+    virtual void Draw( EDA_DRAW_PANEL* panel, wxDC* DC,
+                       GR_DRAWMODE aDrawMode, const wxPoint& offset = ZeroOffset ) = 0;
+
+    /**
+     * Swap data between aItem and aImage.
+     * aItem and aImage should have the same type
+     * Used in undo redo command to swap values between an item and its copy
+     * Only values like layer, size .. which are modified by edition are swapped,
+     * not the pointers like
+     * Pnext and Pback because aItem is not changed in the linked list
+     * @param aImage = the item image which contains data to swap
+     */
+    void SwapData( BOARD_ITEM* aImage );
+
+    /**
+     * Function IsOnLayer
+     * tests to see if this object is on the given layer.  Is virtual so
+     * objects like D_PAD, which reside on multiple layers can do their own
+     * form of testing.
+     * @param aLayer The layer to test for.
+     * @return bool - true if on given layer, else false.
+     */
+    virtual bool IsOnLayer( LAYER_ID aLayer ) const
+    {
+        return m_Layer == aLayer;
+    }
+
+    /**
+     * Function IsTrack
+     * tests to see if this object is a track or via (or microvia).
+     * form of testing.
+     * @return bool - true if a track or via, else false.
+     */
+    bool IsTrack() const
+    {
+        return ( Type() == PCB_TRACE_T ) || ( Type() == PCB_VIA_T );
+    }
+
+    /**
+     * Function IsLocked
+     * @return bool - true if the object is locked, else false
+     */
+    virtual bool IsLocked() const
+    {
+        return false;   // only MODULEs can be locked at this time.
+    }
+
+    /**
+     * Function UnLink
+     * detaches this object from its owner.  This base class implementation
+     * should work for all derived classes which are held in a DLIST<>.
+     */
+    virtual void UnLink();
+
+    /**
+     * Function DeleteStructure
+     * deletes this object after UnLink()ing it from its owner if it has one.
+     */
+    void DeleteStructure()
+    {
+        if( GetList() != NULL )
+            UnLink();
+
+        delete this;
+    }
+
+    /**
+     * Function ShowShape
+     * converts the enum STROKE_T integer value to a wxString.
+     */
+    static wxString ShowShape( STROKE_T aShape );
+
+    // Some geometric transforms, that must be rewritten for derived classes
+    /**
+     * Function Move
+     * move this object.
+     * @param aMoveVector - the move vector for this object.
+     */
+    virtual void Move( const wxPoint& aMoveVector )
+    {
+        wxMessageBox( wxT( "virtual BOARD_ITEM::Move used, should not occur" ), GetClass() );
+    }
+
+    /**
+     * Function Rotate
+     * Rotate this object.
+     * @param aRotCentre - the rotation point.
+     * @param aAngle - the rotation angle in 0.1 degree.
+     */
+    virtual void Rotate( const wxPoint& aRotCentre, double aAngle )
+    {
+        wxMessageBox( wxT( "virtual BOARD_ITEM::Rotate used, should not occur" ), GetClass() );
+    }
+
+    /**
+     * Function Flip
+     * Flip this object, i.e. change the board side for this object
+     * @param aCentre - the rotation point.
+     */
+    virtual void Flip( const wxPoint& aCentre )
+    {
+        wxMessageBox( wxT( "virtual BOARD_ITEM::Flip used, should not occur" ), GetClass() );
+    }
+
+    /**
+     * Function GetBoard
+     * returns the BOARD in which this BOARD_ITEM resides, or NULL if none.
+     */
+    virtual BOARD* GetBoard() const;
+
+    /**
+     * Function GetLayerName
+     * returns the name of the PCB layer on which the item resides.
+     *
+     * @return wxString containing the layer name associated with this item.
+     */
+    wxString GetLayerName() const;
+
+    virtual bool HitTest( const wxPoint& aPosition ) const
+    {
+        return EDA_ITEM::HitTest( aPosition );
+    }
+
+    /**
+     * Function HitTest
+     * tests if the \a aRect intersects or contains this object (depending on \a aContained).
+     *
+     * @param aRect A reference to an EDA_RECT object containg the area to test.
+     * @param aContained Test if \a aRect contains this object completly.
+     * @param aAccuracy Increase the item bounding box by this amount.
+     * @return bool - True if \a aRect contains this object completly or if \a aRect intersects
+     *  the object and \a aContained is False, otherwise false.
+     */
+    virtual bool HitTest( const EDA_RECT& aRect, bool aContained = true, int aAccuracy = 0) const
+    {
+        return false;   // derived classes should override this function
+    }
+
+
+    /**
+     * Function FormatInternalUnits
+     * converts \a aValue from board internal units to a string appropriate for writing to file.
+     *
+     * @note Internal units for board items can be either deci-mils or nanometers depending
+     *       on how KiCad is build.
+     * @param aValue A coordinate value to convert.
+     * @return A std::string object containing the converted value.
+     */
+    static std::string FormatInternalUnits( int aValue );
+
+    /**
+     * Function FormatAngle
+     * converts \a aAngle from board units to a string appropriate for writing to file.
+     *
+     * @note Internal angles for board items can be either degrees or tenths of degree
+     *       on how KiCad is built.
+     * @param aAngle A angle value to convert.
+     * @return A std::string object containing the converted angle.
+     */
+    static std::string FormatAngle( double aAngle );
+
+    static std::string FormatInternalUnits( const wxPoint& aPoint );
+
+    static std::string FormatInternalUnits( const wxSize& aSize );
+
+    /// @copydoc VIEW_ITEM::ViewGetLayers()
+    virtual void ViewGetLayers( int aLayers[], int& aCount ) const;
+
+    /*!
+     * Function IncrementItemReference
+     * Implement if the concept of "incrementing" makes sense for an
+     * item (e.g. modules and pads)
+     * @return if item reference was incremented
+     */
+    virtual bool IncrementItemReference() { return false; }
+};
+
+#endif /* BOARD_ITEM_STRUCT_H */