scunit.h

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// $Id: scunit.h 1282 2006-06-09 09:46:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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              respective authors. See AUTHORS file for details.

LICENSE TO USE AND MODIFY SOFTWARE
----------------------------------

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=================================XARAHEADEREND============================
 */
//

#ifndef INC_SCUNITS
#define INC_SCUNITS

// Definition of the scale units class

//#include "list.h" - in camtypes.h [AUTOMATICALLY REMOVED]

/*********************************************************************************************

>   class Qualfier : public CC_CLASS_MEMDUMP

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/05/96
    Purpose:    A ScaleUnit is defined by:
                A range for which the scaled value is between 0 & 1
                A scaler which converts any value in its range to between 0 & 1
                A qualifier which may be prefixed or suffixed onto the value
                NB: There are no base units as such.

**********************************************************************************************/ 
class Qualifier : public CC_CLASS_MEMDUMP
{
    CC_DECLARE_MEMDUMP(Qualifier);

public:
    enum QUALIFIER_SHOWN
    {
        IS_NOTSHOWN = 0,
        IS_SHOWN = 1
    };

    enum QUALIFIER_AFFIX            // should be subclassed
    {
        SUFFIX = 0,
        PREFIX = 1,
        NONE = -1
    };

    Qualifier();
    virtual ~Qualifier() { }

    Qualifier& operator=(const Qualifier& OtherQualifier);

// Attribute access
    BOOL            SetAttributes(const String_32& NewToken, QUALIFIER_SHOWN WhetherShown);
    String_32       GetToken() const;
    BOOL            IsShown() const;

    virtual BOOL    MakeDisplayString(const StringBase& InString, StringBase* pOutString) const = 0;

    virtual         QUALIFIER_AFFIX GetAffix() const = 0;   // DO NOT USE

protected:
    String_32       m_Token;
    // m_Affix is the affix type of the qualifier, eg.SU_PREFIX for $10 or SU_SUFFIX for 10p
    BOOL            m_bShow;            // whether qualifier shown 

};


/*********************************************************************************************

>   class PrefixQualifier : public Qualifier

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/05/96
    Purpose:    A prefix qualifier is one of the form <QualifierToken><...>, e.g. 5.00

**********************************************************************************************/ 
class PrefixQualifier : public Qualifier
{
    CC_DECLARE_MEMDUMP(PrefixQualifier);

public:
    virtual BOOL MakeDisplayString(const StringBase& InString, StringBase* pOutString) const;

    QUALIFIER_AFFIX GetAffix() const    {   return PREFIX;  }

};


/*********************************************************************************************

>   class SuffixQualifier : public Qualifier

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/05/96
    Purpose:    A suffix qualifier is one of the form <...><QualifierToken>, e.g. 5.00%

**********************************************************************************************/ 
class SuffixQualifier : public Qualifier
{
    CC_DECLARE_MEMDUMP(SuffixQualifier);

public:
    virtual BOOL MakeDisplayString(const StringBase& InString, StringBase* pOutString) const;

    QUALIFIER_AFFIX GetAffix() const    {   return SUFFIX;  }

};


/*********************************************************************************************

>   class SuffixQualifier : public Qualifier

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/05/96
    Purpose:    A suffix qualifier is one of the form <...><QualifierToken>, e.g. 5.00%

**********************************************************************************************/ 
class NullQualifier : public Qualifier
{
    CC_DECLARE_MEMDUMP(NullQualifier);

public:
    virtual BOOL MakeDisplayString(const StringBase& InString, StringBase* pOutString) const;

    QUALIFIER_AFFIX GetAffix() const    {   return NONE;    }

};


/*********************************************************************************************

>   class ScaleUnit : public ListItem

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/05/96
    Purpose:    A ScaleUnit is defined by:
                A range for which the scaled value is between 0 & 1
                A scaler which converts any value in its range to between 0 & 1
                A qualifier which may be prefixed or suffixed onto the value
                NB: There are no base units as such.

**********************************************************************************************/ 
class ScaleUnit : public ListItem
{
    CC_DECLARE_DYNAMIC(ScaleUnit)

public:
// Constructors
    ScaleUnit();
    ScaleUnit(const double dScale, const double dMin, const double dMax);
    ScaleUnit(const double dScale, const UINT32 nDPtoShow);
    ScaleUnit(const ScaleUnit& UnitToCopy);
    
    virtual ScaleUnit& operator =(const ScaleUnit& UnitToCopy);

    virtual ~ScaleUnit();

    // Two ScaleUnits are equal if they have matching qualifiers & scales(?)
    virtual BOOL operator == (const ScaleUnit& RhsUnit) const;
    virtual BOOL operator != (const ScaleUnit& RhsUnit) const;

// Attributes   

    BOOL        SetQualifier(Qualifier& NewQualifier);
    BOOL        SetQualifier(   const StringBase& QualifierParseString, 
                                const Qualifier::QUALIFIER_SHOWN WhetherShown);
    const Qualifier*    GetQualifier() const;

    BOOL        SetDPtoShow(const UINT32 uNumber);
    UINT32      GetDPtoShow() const;

    BOOL        SetMin(const double dMin);
    double      GetMin() const;
    BOOL        SetMax(const double dMax);
    double      GetMax() const;

    BOOL        SetScale(const double dScale);
    double      GetScale() const;

    BOOL        SetRange(const double dMin, const double dMax);
// Operations
    BOOL        ConvertTo0to1(double& dValue) const;
    BOOL        ConvertFrom0to1(double& dValue) const;

    BOOL        StringFromScale(double& dNumber, StringBase* pResult, const UINT32 uSigFigs) const;
protected:

    // By dividing by m_dScale we produce a number between 0 & 1

    double          m_dScale;

    // m_pQualifier is the Qualifier used to identify unit

    Qualifier*      m_pQualifier;

    // The number of decimal places to show

    UINT32          m_nDPtoShow;

    // The range for which our unit returns 0 - 1

    double          m_dMin;
    double          m_dMax;

private:
    // Whether or not ScaleUnit created a new Qualifier
    BOOL            m_bInternalQualifier;
};





/*********************************************************************************************

>   class UnitGroup : public CC_CLASS_MEMDUMP

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/05/96
    Purpose:    A UnitGroup is a set of ScaleUnits that are interconvertible
    Notes:      It is possible to violate the integrity of the UnitGroup by changing
                ScaleUnits included in the group. Kindly use the UpdateUnit method provided.

**********************************************************************************************/ 
class UnitGroup : public CC_CLASS_MEMDUMP
{
    CC_DECLARE_MEMDUMP(UnitGroup);
public:

// Constructor & Destructor
    UnitGroup();
    UnitGroup(const UnitGroup& GroupToCopy);
    BOOL    IsValid()   {return m_bConstructedOK;}

    virtual ~UnitGroup();

    virtual UnitGroup&  operator=(const UnitGroup& GroupToCopy);

    virtual BOOL        operator==(const UnitGroup& RhsGroup) const;
    virtual BOOL        operator!=(const UnitGroup& RhsGroup) const;

// Group Member manipulation
    BOOL        AddUnit(ScaleUnit* pUnit);
    BOOL        AddUnit(ScaleUnit& NewUnit);
    ScaleUnit*  UpdateUnit(const UINT32 uIndex, ScaleUnit& NewUnit);
    BOOL        DeleteUnit(ScaleUnit& UnitToDelete);

// Operations for finding units & references given bits of info
    ScaleUnit*  FindUnitFromQualifier(const String_32& qualifier) const;
    ScaleUnit*  FindUnitFromIndex(const UINT32 uIndex) const;
    INT32           FindIndexFromUnit(const ScaleUnit& thisUnit) const;
// Attributes
    UINT32      GetUnitCount() const;
    BOOL        SetDefaultUnit(ScaleUnit* pUnit);
    ScaleUnit*  GetDefaultUnit() const;
// Conversion
    BOOL        ScaleFromString(const StringBase& string, double& dNumber) const;

protected:
    List        m_UnitList;
    List        m_UnitRefList;
    ScaleUnit*  m_pDefaultUnit;

// Overridables
    virtual void OnUnitChanged(const ScaleUnit& UpdatedUnit);
    virtual BOOL AllowDeletion(const ScaleUnit& UnitToDelete);
    virtual void OnDeleteCompletion(const ScaleUnit& DeletedUnit);

private:
    BOOL    m_bConstructedOK;
};



/*********************************************************************************************

>   class StandardUnit

    Author:     Colin_Barfoot (Xara Group Ltd) <camelotdev@xara.com>
    Created:    02/05/96
    Purpose:    A class utility defining standard units for use as you please, although
                corrupting them may cause some annoyance.
    Notes:      Contains only static members.
    See Also:   class UnitGroup, class ScaleUnit

**********************************************************************************************/ 
class StandardUnit : public CC_CLASS_MEMDUMP
{
    CC_DECLARE_MEMDUMP(StandardUnit);

public:
    static BOOL Init();
    static BOOL DeInit();

    static NullQualifier TheNullQualifier;  // the Qualifier with no token
    // Declare some standard units & groups
    static ScaleUnit UnitPercent;       // 0..100
    static ScaleUnit UnitDecimalD;      // 0..255 with big D as qualifier
    static ScaleUnit UnitDecimald;      // 0..255 with little d as qualifier
    static ScaleUnit UnitDegree;        // 0..360

    static UnitGroup PercentGroup;      // UnitDecimald(D) & UnitPercent
    static UnitGroup AngleGroup;        // UnitDegree
};


//-----------------------------------------------------------------------------------------
#endif  // INC_SCUNITS

---