kicad/include/eda_text.h

/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004 Jean-Pierre Charras, jean-pierre.charras@gipsa-lab.inpg.com
 * Copyright (C) 2004-2011 KiCad Developers, see change_log.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 eda_text.h
 * @brief Definition of base KiCad text object.
 */

#ifndef _EDA_TEXT_H_
#define _EDA_TEXT_H_

#include <common.h>               // wxStringSplit
#include <gr_basic.h>             // EDA_DRAW_MODE_T
#include <base_struct.h>          // EDA_RECT


// Graphic Text justify:
// Values -1,0,1 are used in computations, do not change them
enum EDA_TEXT_HJUSTIFY_T {
    GR_TEXT_HJUSTIFY_LEFT   = -1,
    GR_TEXT_HJUSTIFY_CENTER = 0,
    GR_TEXT_HJUSTIFY_RIGHT  = 1
};


enum EDA_TEXT_VJUSTIFY_T {
    GR_TEXT_VJUSTIFY_TOP    = -1,
    GR_TEXT_VJUSTIFY_CENTER = 0,
    GR_TEXT_VJUSTIFY_BOTTOM = 1
};

/* Options to show solid segments (segments, texts...) */
enum EDA_DRAW_MODE_T {
    LINE = 0,           // segments are drawn as lines
    FILLED,             // normal mode: segments have thickness
    SKETCH              // sketch mode: segments have thickness, but are not filled
};

#define DEFAULT_SIZE_TEXT 60    /* default text height (in mils or 1/1000") */

/**
 * Class EDA_TEXT
 * is a basic class to handle texts (labels, texts on components or footprints
 * ..) not used directly. The "used" text classes are derived from EDA_ITEM and
 * EDA_TEXT using multiple inheritance.
 */
class EDA_TEXT
{
public:
    wxString m_Text;
    int      m_Thickness;               ///< pen size used to draw this text
    double   m_Orient;                  ///< Orient in 0.1 degrees
    wxPoint  m_Pos;                     ///< XY position of anchor text.
    wxSize   m_Size;                    ///< XY size of text
    bool     m_Mirror;                  ///< true if mirrored
    int      m_Attributs;               ///< bit flags such as visible, etc.
    bool     m_Italic;                  ///< should be italic font (if available)
    bool     m_Bold;                    ///< should be bold font (if available)
    EDA_TEXT_HJUSTIFY_T m_HJustify;     ///< horizontal justification
    EDA_TEXT_VJUSTIFY_T m_VJustify;     ///< vertical justification

    bool     m_MultilineAllowed;        /**< true to use multiline option, false
                                         * to use only single line text
                                         * Single line is faster in
                                         * calculations than multiline */

public:
    EDA_TEXT( const wxString& text = wxEmptyString );
    EDA_TEXT( const EDA_TEXT& aText );
    virtual ~EDA_TEXT();

    /**
     * Function SetThickness
     * sets text thickness.
     * @param aNewThickness is the new text thickness.
     */
    void SetThickness( int aNewThickness ) { m_Thickness = aNewThickness; };

    /**
     * Function GetThickness
     * returns text thickness.
     * @return int - text thickness.
     */
    int GetThickness() const { return m_Thickness; };

    void SetOrientation( double aOrientation ) { m_Orient = aOrientation; }
    double GetOrientation() const { return m_Orient; }

    void SetItalic( bool isItalic ) { m_Italic = isItalic; }
    bool IsItalic() const { return m_Italic; }

    void SetMirrored( bool isMirrored ) { m_Mirror = isMirrored; }
    bool IsMirrored() const { return m_Mirror; }

    bool IsDefaultFormatting() const;

    /**
     * Function SetSize
     * sets text size.
     * @param aNewSize is the new text size.
     */
    void SetSize( const wxSize& aNewSize ) { m_Size = aNewSize; };

    /**
     * Function GetSize
     * returns text size.
     * @return wxSize - text size.
     */
    const wxSize GetSize() const { return m_Size; };

    /// named differently than the ones using multiple inheritance and including this class
    void SetPos( const wxPoint& aPoint ) { m_Pos = aPoint; }
    const wxPoint GetPos() const { return m_Pos; }

    int GetLength() const { return m_Text.Length(); };

    /**
     * Function Draw
     * @param aPanel = the current DrawPanel
     * @param aDC = the current Device Context
     * @param aOffset = draw offset (usually (0,0))
     * @param aColor = text color
     * @param aDrawMode = GR_OR, GR_XOR.., -1 to use the current mode.
     * @param aDisplay_mode = LINE, FILLED or SKETCH
     * @param aAnchor_color = anchor color ( UNSPECIFIED = do not draw anchor ).
     */
    void Draw( EDA_DRAW_PANEL* aPanel, wxDC* aDC,
               const wxPoint& aOffset, EDA_COLOR_T aColor,
               int aDrawMode, EDA_DRAW_MODE_T aDisplay_mode = LINE,
               EDA_COLOR_T aAnchor_color = UNSPECIFIED );

private:

    /**
     * Function DrawOneLineOfText
     * Draw a single text line.
     * Used to draw each line of this EDA_TEXT, that can be multiline
     * @param aPanel = the current DrawPanel
     * @param aDC = the current Device Context
     * @param aOffset = draw offset (usually (0,0))
     * @param aColor = text color
     * @param aDrawMode = GR_OR, GR_XOR.., -1 to use the current mode.
     * @param aFillMode = LINE, FILLED or SKETCH
     * @param aAnchor_color = anchor color ( UNSPECIFIED = do not draw anchor ).
     * @param aText = the single line of text to draw.
     * @param aPos = the position of this line ).
     */
    void DrawOneLineOfText( EDA_DRAW_PANEL* aPanel, wxDC* aDC,
                            const wxPoint& aOffset, EDA_COLOR_T aColor,
                            int aDrawMode, EDA_DRAW_MODE_T aFillMode,
                            EDA_COLOR_T aAnchor_color, wxString& aText,
                            wxPoint aPos );

public:

    /**
     * Function TextHitTest
     * Test if \a aPoint is within the bounds of this object.
     * @param aPoint- A wxPoint to test
     * @param aAccuracy - Amount to inflate the bounding box.
     * @return bool - true if a hit, else false
     */
    bool TextHitTest( const wxPoint& aPoint, int aAccuracy = 0 ) const;

    /**
     * Function TextHitTest (overloaded)
     * Tests if object bounding box is contained within or intersects \a aRect.
     *
     * @param aRect - Rect to test against.
     * @param aContains - Test for containment instead of intersection if true.
     * @param aAccuracy - Amount to inflate the bounding box.
     * @return bool - true if a hit, else false
     */
    bool TextHitTest( const EDA_RECT& aRect, bool aContains = false, int aAccuracy = 0 ) const;

    /**
     * Function LenSize
     * @return the text length in internal units
     * @param aLine : the line of text to consider.
     * For single line text, this parameter is always m_Text
     */
    int LenSize( const wxString& aLine ) const;

    /**
     * Function GetTextBox
     * useful in multiline texts to calculate the full text or a line area (for
     * zones filling, locate functions....)
     * @return the rect containing the line of text (i.e. the position and the
     *         size of one line) this rectangle is calculated for 0 orient text.
     *         If orientation is not 0 the rect must be rotated to match the
     *         physical area
     * @param aLine The line of text to consider.
     * for single line text, aLine is unused
     * If aLine == -1, the full area (considering all lines) is returned
     * @param aThickness Overrides the current thickness when greater than 0.
     * @param aInvertY Invert the Y axis when calculating bounding box.
     */
    EDA_RECT GetTextBox( int aLine = -1, int aThickness = -1, bool aInvertY = false ) const;

    /**
     * Function GetInterline
     * return the distance between 2 text lines
     * has meaning only for multiline texts
     */
    int GetInterline() const
    {
        return (( m_Size.y * 14 ) / 10) + m_Thickness;
    }

    /**
     * Function GetTextStyleName
     * @return a wxString with the style name( Normal, Italic, Bold, Bold+Italic)
     */
    wxString GetTextStyleName();

    void SetText( const wxString& aText ) { m_Text = aText; }

    /**
     * Function GetText
     * returns the string associated with the text object.
     * <p>
     * This function is virtual to allow derived classes to override getting the
     * string to provide a way for modifying the base string by adding a suffix or
     * prefix to the base string.
     * </p>
     * @return a const wxString object containing the string of the item.
     */
    virtual const wxString GetText() const { return m_Text; }

    EDA_TEXT_HJUSTIFY_T GetHorizJustify() const { return m_HJustify; };
    EDA_TEXT_VJUSTIFY_T GetVertJustify() const { return m_VJustify; };
    void SetHorizJustify( EDA_TEXT_HJUSTIFY_T aType ) { m_HJustify = aType; };
    void SetVertJustify( EDA_TEXT_VJUSTIFY_T aType ) { m_VJustify = aType; };

    /**
     * Function Format
     * outputs the object to \a aFormatter in s-expression form.
     *
     * @param aFormatter The #OUTPUTFORMATTER object to write to.
     * @param aNestLevel The indentation next level.
     * @param aControlBits The control bit definition for object specific formatting.
     * @throw IO_ERROR on write error.
     */
    virtual void Format( OUTPUTFORMATTER* aFormatter, int aNestLevel, int aControlBits ) const
        throw( IO_ERROR );

};


#endif   //  _EDA_TEXT_H_