type_scale.hpp

#pragma once
 
#include <QQmlEngine>
#include <QFont>
#include "qml_material/core.hpp"
 
namespace qml_material::token
{
//  Font.Thin   0
//  Font.ExtraLight 12
//  Font.Light  25
//  Font.Normal 50
//  Font.Medium 57
//  Font.DemiBold   63
//  Font.Bold   75
//  Font.ExtraBold  81
//  Font.Black  87
 
// Value    Common weight name
// 100  Thin (Hairline)
// 200  Extra Light (Ultra Light)
// 300  Light
// 400  Normal (Regular)
// 500  Medium
// 600  Semi Bold (Demi Bold)
// 700  Bold
// 800  Extra Bold (Ultra Bold)
// 900  Black (Heavy)
// 950  Extra Black (Ultra Black)
 
struct TypeScaleItem {
    Q_GADGET
    QML_ELEMENT
    QML_VALUE_TYPE(t_typescale)
 
    
    Q_PROPERTY(qint32 size MEMBER size FINAL)
    Q_PROPERTY(qint32 line_height MEMBER line_height FINAL)
    Q_PROPERTY(QFont::Weight weight MEMBER weight FINAL)
    Q_PROPERTY(QFont::Weight weight_prominent MEMBER weight_prominent FINAL)
    Q_PROPERTY(qreal tracking MEMBER tracking FINAL)
public:
    Q_INVOKABLE TypeScaleItem fresh() const { return *this; }
 
    i32           size { 14 };
    i32           line_height { 24 };
    QFont::Weight weight { QFont::Weight::Normal };
    QFont::Weight weight_prominent { QFont::Weight::Normal };
    qreal         tracking { 0 };
};
 
class TypeScale : public QObject {
    Q_OBJECT
    QML_ELEMENT
public:
    using QObject::QObject;
 
#define X(NAME, ...)                                                                            \
    Q_PROPERTY(qml_material::token::TypeScaleItem NAME READ NAME NOTIFY typescaleChanged FINAL) \
public:                                                                                         \
    const TypeScaleItem& NAME() const { return m_##NAME; }                                      \
                                                                                                \
private:                                                                                        \
    TypeScaleItem m_##NAME { __VA_ARGS__ };
 
    // clang-format off
    X(display_large  , 57, 64, QFont::Normal, QFont::Normal, -0.25)
    X(display_medium , 45, 52, QFont::Normal, QFont::Normal, 0.0  )
    X(display_small  , 36, 44, QFont::Normal, QFont::Normal, 0.0  )
    X(headline_large , 32, 40, QFont::Medium, QFont::Medium, 0.0  )
    X(headline_medium, 28, 36, QFont::Medium, QFont::Medium, 0.0  )
    X(headline_small , 24, 32, QFont::Medium, QFont::Medium, 0.0  )
    X(title_large    , 22, 28, QFont::Normal, QFont::Normal, 0.0  )
    X(title_medium   , 16, 24, QFont::Medium, QFont::Medium, 0.15 )
    X(title_small    , 14, 20, QFont::Medium, QFont::Medium, 0.1  )
    X(body_large     , 16, 24, QFont::Normal, QFont::Normal, 0.5  )
    X(body_medium    , 14, 20, QFont::Normal, QFont::Normal, 0.25 )
    X(body_small     , 12, 16, QFont::Normal, QFont::Normal, 0.4  )
    X(label_large    , 14, 20, QFont::Medium, QFont::Bold  , 0.1  )
    X(label_medium   , 12, 16, QFont::Medium, QFont::Bold  , 0.5  )
    X(label_small    , 11, 16, QFont::Medium, QFont::Bold  , 0.5  )
    // clang-format on
 
#undef X
 
    Q_SIGNAL void typescaleChanged();
};
 
} // namespace qml_material::token