src/core/symbology-ng/qgsvectorcolorrampv2.h

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#ifndef QGSVECTORCOLORRAMPV2_H
#define QGSVECTORCOLORRAMPV2_H

#include <QColor>

#include "qgssymbollayerv2.h" // for QgsStringMap

class CORE_EXPORT QgsVectorColorRampV2
{
  public:
    virtual ~QgsVectorColorRampV2() {}

    virtual QColor color( double value ) const = 0;

    virtual QString type() const = 0;

    virtual QgsVectorColorRampV2* clone() const = 0;

    virtual QgsStringMap properties() const = 0;

};

#define DEFAULT_GRADIENT_COLOR1 QColor(0,0,255)
#define DEFAULT_GRADIENT_COLOR2 QColor(0,255,0)

class CORE_EXPORT QgsVectorGradientColorRampV2 : public QgsVectorColorRampV2
{
  public:
    QgsVectorGradientColorRampV2( QColor color1 = DEFAULT_GRADIENT_COLOR1,
                                  QColor color2 = DEFAULT_GRADIENT_COLOR2 );

    static QgsVectorColorRampV2* create( const QgsStringMap& properties = QgsStringMap() );

    virtual QColor color( double value ) const;

    virtual QString type() const { return "gradient"; }

    virtual QgsVectorColorRampV2* clone() const;

    virtual QgsStringMap properties() const;

    QColor color1() const { return mColor1; }
    QColor color2() const { return mColor2; }

    void setColor1( QColor color ) { mColor1 = color; }
    void setColor2( QColor color ) { mColor2 = color; }

    typedef QMap<double, QColor> StopsMap;

    void setStops( const StopsMap& stops ) { mStops = stops; }
    const StopsMap& stops() const { return mStops; }

  protected:
    QColor mColor1, mColor2;
    StopsMap mStops;
};

#define DEFAULT_RANDOM_COUNT   10
#define DEFAULT_RANDOM_HUE_MIN 0
#define DEFAULT_RANDOM_HUE_MAX 359
#define DEFAULT_RANDOM_VAL_MIN 0
#define DEFAULT_RANDOM_VAL_MAX 255
#define DEFAULT_RANDOM_SAT_MIN 0
#define DEFAULT_RANDOM_SAT_MAX 255

class CORE_EXPORT QgsVectorRandomColorRampV2 : public QgsVectorColorRampV2
{
  public:
    QgsVectorRandomColorRampV2( int count = DEFAULT_RANDOM_COUNT,
                                int hueMin = DEFAULT_RANDOM_HUE_MIN, int hueMax = DEFAULT_RANDOM_HUE_MAX,
                                int satMin = DEFAULT_RANDOM_SAT_MIN, int satMax = DEFAULT_RANDOM_SAT_MAX,
                                int valMin = DEFAULT_RANDOM_VAL_MIN, int valMax = DEFAULT_RANDOM_VAL_MAX );

    static QgsVectorColorRampV2* create( const QgsStringMap& properties = QgsStringMap() );

    virtual QColor color( double value ) const;

    virtual QString type() const { return "random"; }

    virtual QgsVectorColorRampV2* clone() const;

    virtual QgsStringMap properties() const;

    void updateColors();

    int count() const { return mCount; }
    int hueMin() const { return mHueMin; }
    int hueMax() const { return mHueMax; }
    int satMin() const { return mSatMin; }
    int satMax() const { return mSatMax; }
    int valMin() const { return mValMin; }
    int valMax() const { return mValMax; }

    void setCount( int val ) { mCount = val; }
    void setHueMin( int val ) { mHueMin = val; }
    void setHueMax( int val ) { mHueMax = val; }
    void setSatMin( int val ) { mSatMin = val; }
    void setSatMax( int val ) { mSatMax = val; }
    void setValMin( int val ) { mValMin = val; }
    void setValMax( int val ) { mValMax = val; }

  protected:
    int mCount;
    int mHueMin, mHueMax, mSatMin, mSatMax, mValMin, mValMax;
    QList<QColor> mColors;
};


#define DEFAULT_COLORBREWER_SCHEMENAME "Spectral"
#define DEFAULT_COLORBREWER_COLORS     5

class CORE_EXPORT QgsVectorColorBrewerColorRampV2 : public QgsVectorColorRampV2
{
  public:
    QgsVectorColorBrewerColorRampV2( QString schemeName = DEFAULT_COLORBREWER_SCHEMENAME,
                                     int colors = DEFAULT_COLORBREWER_COLORS );

    static QgsVectorColorRampV2* create( const QgsStringMap& properties = QgsStringMap() );

    virtual QColor color( double value ) const;

    virtual QString type() const { return "colorbrewer"; }

    virtual QgsVectorColorRampV2* clone() const;

    virtual QgsStringMap properties() const;

    QString schemeName() const { return mSchemeName; }
    int colors() const { return mColors; }

    void setSchemeName( QString schemeName ) { mSchemeName = schemeName; loadPalette(); }
    void setColors( int colors ) { mColors = colors; loadPalette(); }

    static QStringList listSchemeNames();
    static QList<int> listSchemeVariants( QString schemeName );

  protected:

    void loadPalette();

    QString mSchemeName;
    int mColors;
    QList<QColor> mPalette;
};

#endif