////  Created by Bradley Austin Davis 2016/01/20//  Copyright 2015 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #include "Preferences.h"  void Preferences::addPreference(Preference* preference) {    preference->setParent(this);     const QString& category = preference->getCategory();     // Use this structure to maintain the order of the categories    if (!_categories.contains(category)) {        _categories.append(category);    }        QVariantList categoryPreferences;    // FIXME is there an easier way to do this with less copying?    if (_preferencesByCategory.contains(category)) {        categoryPreferences = qvariant_cast<QVariantList>(_preferencesByCategory[category]);    }     categoryPreferences.append(QVariant::fromValue(preference));    _preferencesByCategory[category] = categoryPreferences;} void Preference::setEnabler(BoolPreference* enabler, bool inverse) {    if (_enabler) {        disconnect(_enabler);        _enabler = nullptr;    }     _enabler = enabler;    _enablerInverted = inverse;    if (_enabler) {        connect(_enabler, &BoolPreference::valueChanged, this, &Preference::onEnablerValueChanged);        onEnablerValueChanged();    }} void Preference::onEnablerValueChanged() {    bool value = _enabler->getValue();    if (_enablerInverted) {        value = !value;    }    setEnabled(value);}