/**************************/
/* Graphic Body Item: Arc */
/**************************/

#ifndef _LIB_ARC_H_
#define _LIB_ARC_H_


#include "lib_draw_item.h"


class TRANSFORM;


class LIB_ARC : public LIB_DRAW_ITEM
{
    enum SELECT_T
    {
        START,
        END,
        OUTLINE,
    };

    wxPoint  m_savedStartPos;
    wxPoint  m_savedEndPos;
    int      m_savedAngle1;
    int      m_savedAngle2;
    double   m_editCenterDistance;
    SELECT_T m_editSelectPoint;
    int      m_editState;
    int      m_editDirection;
    int      m_lastEditState;

    /**
     * Draws the arc.
     */
    void drawGraphic( WinEDA_DrawPanel* aPanel, wxDC* aDC, const wxPoint& aOffset,
                      int aColor, int aDrawMode, void* aData, const TRANSFORM& aTransform );

    /**
     * Draw the graphics when the arc is being edited.
     */
    void drawEditGraphics( EDA_Rect* aClipBox, wxDC* aDC, int aColor );

    /**
     * See LIB_DRAW_ITEM::saveAttributes().
     */
    void saveAttributes();

    /**
     * See LIB_DRAW_ITEM::restoreAttributes().
     */
    void restoreAttributes();

    /**
     * Calculates the center, radius, and angles at \a aPosition when the arc is being edited.
     *
     * Note: The center may not necessarily be on the grid.
     *
     * @param aPosition - The current mouse position in drawing coordinates.
     */
    void calcEdit( const wxPoint& aPosition );

    /**
     * Calculate the radius and angle of an arc using the start, end, and center points.
     */
    void calcRadiusAngles();

public:
    int     m_Radius;
    int     m_t1;       /* First radius angle of the arc in 0.1 degrees. */
    int     m_t2;       /* Second radius angle of the arc in 0.1 degrees. */
    wxPoint m_ArcStart;
    wxPoint m_ArcEnd;   /* Arc end position. */
    wxPoint m_Pos;      /* Radius center point. */
    int     m_Width;    /* Line width */

public:
    LIB_ARC( LIB_COMPONENT * aParent );
    LIB_ARC( const LIB_ARC& aArc );
    ~LIB_ARC() { }
    virtual wxString GetClass() const
    {
        return wxT( "LIB_ARC" );
    }


    /**
     * Save arc object to a FILE in "*.lib" format.
     *
     * @param aFile The FILE to write to.
     * @return - True if success writing else false.
     */
    virtual bool Save( FILE* aFile );
    virtual bool Load( char* aLine, wxString& aErrorMsg );

    /**
     * Tests if the given wxPoint is within the bounds of this object.
     *
     * @param aRefPos - Coordinates to test
     * @return - True if a hit, else false
     */
    virtual bool HitTest( const wxPoint& aRefPos );

     /**
     * @param aPosRef - a wxPoint to test
     * @param aThreshold - max distance to this object (usually the half
     *                     thickness of a line)
     * @param aTransform - the transform matrix
     * @return - True if the point aPosRef is near this object
     */
    virtual bool HitTest( wxPoint aPosRef, int aThreshold, const TRANSFORM& aTransform );

    virtual EDA_Rect GetBoundingBox();
    virtual void DisplayInfo( WinEDA_DrawFrame* frame );

    /**
     * @return the size of the "pen" that be used to draw or plot this item
     */
    virtual int GetPenSize( );

    /**
     * See LIB_DRAW_ITEM::BeginEdit().
     */
    void BeginEdit( int aEditMode, const wxPoint aStartPoint = wxPoint( 0, 0 ) );

    /**
     * See LIB_DRAW_ITEM::ContinueEdit().
     */
    bool ContinueEdit( const wxPoint aNextPoint );

    /**
     * See LIB_DRAW_ITEM::AbortEdit().
     */
    void EndEdit( const wxPoint& aPosition, bool aAbort = false );

protected:
    virtual LIB_DRAW_ITEM* DoGenCopy();

    /**
     * Provide the arc draw object specific comparison.
     *
     * The sort order is as follows:
     *      - Arc horizontal (X) position.
     *      - Arc vertical (Y) position.
     *      - Arc start angle.
     *      - Arc end angle.
     */
    virtual int DoCompare( const LIB_DRAW_ITEM& aOther ) const;
    virtual void DoOffset( const wxPoint& aOffset );
    virtual bool DoTestInside( EDA_Rect& aRect );
    virtual void DoMove( const wxPoint& aPosition );
    virtual wxPoint DoGetPosition() { return m_Pos; }
    virtual void DoMirrorHorizontal( const wxPoint& aCenter );
    virtual void DoPlot( PLOTTER* aPlotter, const wxPoint& aOffset, bool aFill,
                         const TRANSFORM& aTransform );
    virtual int DoGetWidth() { return m_Width; }
    virtual void DoSetWidth( int aWidth ) { m_Width = aWidth; }
};


#endif    // _LIB_ARC_H_
