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/*
* Copyright 2013 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; version 3.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Author: Lars Uebernickel <lars.uebernickel@canonical.com>
*/
#include "gsettings-qml.h"
#include <QGSettings>
struct GSettingsSchemaQmlPrivate
{
QByteArray id;
QByteArray path;
bool isValid;
GSettingsSchemaQmlPrivate() : isValid(false) {}
};
struct GSettingsQmlPrivate
{
GSettingsSchemaQml *schema;
QGSettings *settings;
};
GSettingsSchemaQml::GSettingsSchemaQml(QObject *parent): QObject(parent)
{
priv = new GSettingsSchemaQmlPrivate;
}
GSettingsSchemaQml::~GSettingsSchemaQml()
{
delete priv;
}
QByteArray GSettingsSchemaQml::id() const
{
return priv->id;
}
void GSettingsSchemaQml::setId(const QByteArray &id)
{
if (!priv->id.isEmpty()) {
qWarning("GSettings.schema.id may only be set on construction");
return;
}
priv->id = id;
}
QByteArray GSettingsSchemaQml::path() const
{
return priv->path;
}
void GSettingsSchemaQml::setPath(const QByteArray &path)
{
if (!priv->path.isEmpty()) {
qWarning("GSettings.schema.path may only be set on construction");
return;
}
priv->path = path;
}
bool GSettingsSchemaQml::isValid() const
{
return priv->isValid;
}
void GSettingsSchemaQml::setIsValid(bool valid)
{
if (valid != priv->isValid) {
priv->isValid = valid;
Q_EMIT isValidChanged();
}
}
QVariantList GSettingsSchemaQml::choices(const QByteArray &key) const
{
GSettingsQml *parent = (GSettingsQml *) this->parent();
if (parent->priv->settings == NULL)
return QVariantList();
if (!parent->contains(key))
return QVariantList();
return parent->priv->settings->choices(key);
}
void GSettingsSchemaQml::reset(const QByteArray &key)
{
GSettingsQml *parent = (GSettingsQml *) this->parent();
if (parent->priv->settings != NULL) {
parent->priv->settings->reset(key);
// make sure this object gets the new value immediately and not on the
// next main loop iteration (see updateValue)
parent->settingChanged(key);
}
}
GSettingsQml::GSettingsQml(QObject *parent): QQmlPropertyMap(this, parent)
{
priv = new GSettingsQmlPrivate;
priv->schema = new GSettingsSchemaQml(this);
priv->settings = NULL;
}
GSettingsQml::~GSettingsQml()
{
delete priv;
}
GSettingsSchemaQml * GSettingsQml::schema() const
{
return priv->schema;
}
void GSettingsQml::classBegin()
{
}
void GSettingsQml::componentComplete()
{
bool schemaValid = QGSettings::isSchemaInstalled(priv->schema->id());
if (schemaValid) {
priv->settings = new QGSettings(priv->schema->id(), priv->schema->path(), this);
connect(priv->settings, &QGSettings::changed, this, &GSettingsQml::settingChanged);
Q_FOREACH(const QString &key, priv->settings->keys())
this->insert(key, priv->settings->get(key));
Q_EMIT schemaChanged();
}
// emit isValid notification only once everything is setup
priv->schema->setIsValid(schemaValid);
}
void GSettingsQml::settingChanged(const QString &key)
{
QVariant value = priv->settings->get(key);
if (this->value(key) != value) {
this->insert(key, value);
Q_EMIT changed(key, value);
}
}
QVariant GSettingsQml::updateValue(const QString& key, const QVariant &value)
{
if (priv->settings == NULL)
return QVariant();
if (priv->settings->trySet(key, value)) {
// due to QTBUG-32859, QGSettings doesn't dispatch its changed signal
// directly, but on a new main loop iteration. At that point, this
// object already has the new value set and doesn't emit its own
// changed signal (see ::settingChanged). Emit it here so that it is
// sent even when the setting is changed from qml.
Q_EMIT changed(key, value);
return value;
}
else {
qWarning("unable to set key '%s' to value '%s'", key.toUtf8().constData(), value.toString().toUtf8().constData());
return priv->settings->get(key);
}
}
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