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/* Copyright (c) 2013 Stanislaw Halik
*
* 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 <QSettings>
#include <QSettings>
#include <QMap>
#include <QString>
#include <QVariant>
#include <memory>
#include <cassert>
#include <QWidget>
#include <QComboBox>
#include <QCheckBox>
#include <QDoubleSpinBox>
#include <QSpinBox>
#include <QSlider>
namespace options {
template<typename T>
inline T qcruft_to_t(const QVariant& t);
template<>
inline int qcruft_to_t<int>(const QVariant& t)
{
return t.toInt();
}
template<>
inline bool qcruft_to_t<bool>(const QVariant& t)
{
return t.toBool();
}
template<>
inline double qcruft_to_t<double>(const QVariant& t)
{
return t.toDouble();
}
template<>
inline float qcruft_to_t<float>(const QVariant& t)
{
return t.toFloat();
}
// snapshot of qsettings group at given time
class group {
private:
QMap<QString, QVariant> map;
QString name;
public:
group(const QString& name, QSettings& s) : name(name)
{
s.beginGroup(name);
for (auto& k : s.childKeys())
map[k] = s.value(k);
s.endGroup();
}
static constexpr const char* org = "opentrack";
void save() {
QSettings s(org);
s.beginGroup(name);
for (auto& k : map.keys())
s.setValue(k, map[k]);
s.endGroup();
}
template<typename T>
T get(const QString& k) {
return qcruft_to_t<T>(map.value(k));
}
void put(const QString& s, const QVariant& d)
{
map[s] = d;
}
bool contains(const QString& s)
{
return map.contains(s);
}
};
class bundle {
private:
const QString group_name;
group saved;
group transient;
bundle(const bundle&) = delete;
bundle& operator=(const bundle&) = delete;
bool modified;
public:
bundle(const QString& group_name, QSettings& s) :
group_name(group_name),
saved(group_name, s),
transient(saved),
modified(false)
{
}
std::shared_ptr<bundle> make(const QString& name, QSettings& s) {
assert(s.format() == QSettings::IniFormat);
return std::make_shared<bundle>(name, s);
}
void store(const QString& name, QVariant& datum)
{
modified = true;
transient.put(name, datum);
}
bool contains(const QString& name)
{
return transient.contains(name);
}
template<typename T>
T get(QString& name) {
transient.get<T>(name);
}
void save()
{
modified = false;
saved = transient;
transient.save();
}
void revert()
{
modified = false;
transient = saved;
}
};
typedef std::shared_ptr<bundle> pbundle;
class QCruft : public QObject {
};
template<typename T>
class value : public QCruft {
private:
QString self_name;
pbundle b;
public:
value(const pbundle& b, const QString& name, T def) :
self_name(name),
b(b)
{
if (!b->contains(name))
{
QVariant cruft(def);
b->store(self_name, cruft);
}
}
operator T() { return b->get<T>(self_name); }
T& operator=(const T& datum) {
b->store(self_name, datum);
emit valueChanged(datum);
return datum;
}
public slots:
void setValue(const T datum) {
this->operator =(datum);
}
signals:
void valueChanged(T datum);
};
template<typename T, typename Q>
inline void tie(value<T>&, Q*);
template<>
inline void tie<int, QComboBox>(value<int>& v, QComboBox* cb)
{
QObject::connect(cb, SIGNAL(currentIndexChanged(int)), &v, SLOT(setValue(int)));
QObject::connect(&v, SIGNAL(valueChanged(int)), &v, SLOT(setValue(int)));
}
template<>
inline void tie<QString, QComboBox>(value<QString>& v, QComboBox* cb)
{
QObject::connect(cb, SIGNAL(currentTextChanged(QString)), &v, SLOT(setValue(QString)));
QObject::connect(&v, SIGNAL(valueChanged(QString)), &v, SLOT(setValue(QString)));
}
template<>
inline void tie<bool, QCheckBox>(value<bool>& v, QCheckBox* cb)
{
QObject::connect(cb, SIGNAL(toggled(bool)), &v, SLOT(setValue(bool)));
QObject::connect(&v, SIGNAL(valueChanged(bool)), cb, SLOT(setChecked(bool)));
}
template<>
inline void tie<double, QDoubleSpinBox>(value<double>& v, QDoubleSpinBox* dsb)
{
QObject::connect(dsb, SIGNAL(valueChanged(double)), &v, SLOT(setValue(double)));
QObject::connect(&v, SIGNAL(valueChanged(double)), dsb, SLOT(setValue(double)));
}
template<>
inline void tie<int, QSpinBox>(value<int>& v, QSpinBox* sb)
{
QObject::connect(sb, SIGNAL(valueChanged(int)), &v, SLOT(setValue(int)));
QObject::connect(&v, SIGNAL(valueChanged(int)), sb, SLOT(setValue(int)));
}
template<>
inline void tie<int, QSlider>(value<int>& v, QSlider* sl)
{
QObject::connect(sl, SIGNAL(valueChanged(int)), &v, SLOT(setValue(int)));
QObject::connect(&v, SIGNAL(valueChanged(int)), sl, SLOT(setValue(int)));
}
}
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