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/* Copyright (c) 2015-2016, Stanislaw Halik <sthalik@misaki.pl>
* Permission to use, copy, modify, and/or distribute this
* software for any purpose with or without fee is hereby granted,
* provided that the above copyright notice and this permission
* notice appear in all copies.
*/
#pragma once
#include "connector.hpp"
#include "bundle.hpp"
#include "slider.hpp"
#include <type_traits>
#include <typeinfo>
#include <typeindex>
#include <QString>
#include <QPointF>
#include <QList>
#define OPENTRACK_DEFINE_SLOT(t) void setValue(t datum) { store(datum); }
#define OPENTRACK_DEFINE_SIGNAL(t) void valueChanged(t) const
namespace options {
namespace detail {
template<typename t> struct value_type_traits { using type = t;};
template<> struct value_type_traits<QString> { using type = const QString&; };
template<> struct value_type_traits<slider_value> { using type = const slider_value&; };
template<typename u> struct value_type_traits<QList<u>>
{
using type = const QList<u>&;
};
template<typename t> using value_type_t = typename value_type_traits<t>::type;
}
class OPENTRACK_OPTIONS_EXPORT base_value : public QObject
{
Q_OBJECT
friend class ::options::detail::connector;
using comparator = bool(*)(const QVariant& val1, const QVariant& val2);
public:
QString name() const { return self_name; }
base_value(bundle b, const QString& name, comparator cmp, std::type_index type_idx);
~base_value() override;
signals:
OPENTRACK_DEFINE_SIGNAL(double);
OPENTRACK_DEFINE_SIGNAL(float);
OPENTRACK_DEFINE_SIGNAL(int);
OPENTRACK_DEFINE_SIGNAL(bool);
OPENTRACK_DEFINE_SIGNAL(const QString&);
OPENTRACK_DEFINE_SIGNAL(const slider_value&);
OPENTRACK_DEFINE_SIGNAL(const QPointF&);
OPENTRACK_DEFINE_SIGNAL(const QList<double>&);
OPENTRACK_DEFINE_SIGNAL(const QList<float>&);
OPENTRACK_DEFINE_SIGNAL(const QList<int>&);
OPENTRACK_DEFINE_SIGNAL(const QList<bool>&);
OPENTRACK_DEFINE_SIGNAL(const QList<QString>&);
OPENTRACK_DEFINE_SIGNAL(const QList<slider_value>&);
OPENTRACK_DEFINE_SIGNAL(const QList<QPointF>&);
protected:
bundle b;
QString self_name;
comparator cmp;
std::type_index type_index;
template<typename t>
void store(const t& datum)
{
b->store_kv(self_name, QVariant::fromValue(datum));
}
public slots:
OPENTRACK_DEFINE_SLOT(double)
OPENTRACK_DEFINE_SLOT(int)
OPENTRACK_DEFINE_SLOT(bool)
OPENTRACK_DEFINE_SLOT(const QString&)
OPENTRACK_DEFINE_SLOT(const slider_value&)
OPENTRACK_DEFINE_SLOT(const QPointF&)
OPENTRACK_DEFINE_SLOT(const QList<double>&)
OPENTRACK_DEFINE_SLOT(const QList<float>&)
OPENTRACK_DEFINE_SLOT(const QList<int>&)
OPENTRACK_DEFINE_SLOT(const QList<bool>&)
OPENTRACK_DEFINE_SLOT(const QList<QString>&)
OPENTRACK_DEFINE_SLOT(const QList<slider_value>&)
OPENTRACK_DEFINE_SLOT(const QList<QPointF>&)
virtual void reload() = 0;
virtual void bundle_value_changed() const = 0;
};
namespace detail {
template<typename t>
struct value_get_traits
{
static inline t get(const t& val, const t&)
{
return val;
}
};
template<>
struct value_get_traits<slider_value>
{
using t = slider_value;
static inline t get(const t& val, const t& def)
{
return t(val.cur(), def.min(), def.max());
}
};
template<typename t, typename Enable = void>
struct value_element_type
{
using type = typename std::remove_reference<typename std::remove_cv<t>::type>::type;
};
// Qt uses int a lot in slots so use it for all enums
template<typename t>
struct value_element_type<t, typename std::enable_if<std::is_enum<t>::value>::type>
{
using type = int;
};
template<> struct value_element_type<float, void> { using type = double; };
template<typename t> using value_element_type_t = typename value_element_type<t>::type;
}
template<typename t>
class value final : public base_value
{
public:
using element_type = detail::value_element_type_t<t>;
static bool is_equal(const QVariant& val1, const QVariant& val2)
{
return val1.value<element_type>() == val2.value<element_type>();
}
t operator=(const t& datum)
{
const element_type tmp = static_cast<element_type>(datum);
if (tmp != get())
store(tmp);
return datum;
}
static constexpr const Qt::ConnectionType DIRECT_CONNTYPE = Qt::DirectConnection;
static constexpr const Qt::ConnectionType SAFE_CONNTYPE = Qt::QueuedConnection;
value(bundle b, const QString& name, t def) : base_value(b, name, &is_equal, std::type_index(typeid(element_type))), def(def)
{
QObject::connect(b.get(), SIGNAL(reloading()),
this, SLOT(reload()),
DIRECT_CONNTYPE);
if (!b->contains(name) || b->get<QVariant>(name).type() == QVariant::Invalid)
*this = def;
}
value(bundle b, const char* name, t def) : value(b, QString(name), def)
{
}
t default_value() const
{
return def;
}
operator t() const { return get(); }
void reload() override
{
*this = static_cast<t>(*this);
}
void bundle_value_changed() const override
{
emit valueChanged(static_cast<detail::value_type_t<t>>(get()));
}
element_type operator()() const
{
return get();
}
private:
t get() const
{
t val = b->contains(self_name)
? static_cast<t>(b->get<element_type>(self_name))
: def;
return detail::value_get_traits<t>::get(val, def);
}
const t def;
};
}
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