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-rw-r--r--facetracknoir/options.hpp200
1 files changed, 200 insertions, 0 deletions
diff --git a/facetracknoir/options.hpp b/facetracknoir/options.hpp
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+++ b/facetracknoir/options.hpp
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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;
+ }
+ };
+
+ 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(QString& name, QVariant& datum)
+ {
+ modified = true;
+ transient.put(name, datum);
+ }
+ 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:
+ const QString self_name;
+ pbundle b;
+ public:
+ value(const pbundle& b, const QString& name) :
+ self_name(name),
+ b(b)
+ {
+ }
+ 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)));
+ }
+}