Getting the profile setting using QT settings - c++

Question

I'm using the Qt settings and it saves the object into a file. it saves to a file called sessionrc.
Now I'm trying to load the object from the settings and save it back.
The problem is I can not identify the object from the settings, so that I can load all the profiles that are saved.
I'm using the following load and save functionality
void ProfileManager::loadFrom(Settings &set, bool ownGroup)
{
qDebug()<<"LOAD";
foreach (const QString &group, set.childGroups()) {
if(group == "Profile")
{
Profile *profile = new Profile();
profile->setObjectName(group);
profile->loadFrom(set);
m_Profiles << profile;
}
}
EraObject::staticLoadFrom(set, this);
}
void ProfileManager::saveTo(Settings &set, bool ownGroup, bool force)
{
EraObject::staticSaveTo(set, this, ownGroup, force);
foreach(Profile * profile, m_Profiles) {
profile->saveTo(set);
}
}
The current setting file is
[www]
Ta=20
Te=48
Texp=38
lim1=0
lim2=0
offset=0
profilename=www
[www] is the profile that is saved. but I have many of it. How would I load it back and save it correctly

Answer 1

// main.cpp
#include <QCoreApplication>
#include <QSettings>
#include <QVector>
#include <QDebug>
#include <QMetaProperty>
class Profile : public QObject
{
Q_OBJECT
Q_PROPERTY(QString name READ name WRITE setName )
Q_PROPERTY(QString title READ title WRITE setTitle )
public:
explicit Profile(QObject *parent = 0) : QObject(parent) {
}
QString name() const {
return name_;
}
void setName(QString name) {
name_ = name;
}
QString title() const {
return title_;
}
void setTitle(QString title) {
title_ = title;
}
void save(QSettings& settings) const {
for(int i=0; i<metaObject()->propertyCount(); ++i) {
const auto& p = metaObject()->property(i);
if(p.isStored(this)) {
settings.setValue(p.name(), property(p.name()));
}
}
}
void load(QSettings& settings) {
for(int i=0; i<metaObject()->propertyCount(); ++i) {
const auto& p = metaObject()->property(i);
if(p.isStored(this)) {
setProperty(p.name(), settings.value(p.name()));
}
}
}
private:
QString name_;
QString title_;
};
#include "main.moc"
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
QObject garbageCollector;
QVector<Profile*> profiles;
{
Profile* p1 = new Profile(&garbageCollector);
p1->setName("profilename1");
p1->setTitle("Profile 1");
Profile* p2 = new Profile(&garbageCollector);
p2->setName("profilename2");
p2->setTitle("Profile 2");
profiles.append(p1);
profiles.append(p2);
}
QSettings s("profiles.ini", QSettings::IniFormat);
// write profiles
{
s.beginGroup("profiles");
foreach(const Profile*p, profiles) {
s.beginGroup(p->name());
p->save(s);
s.endGroup();
}
s.endGroup();
s.sync(); // force write
}
// read profiles
{
s.beginGroup("profiles");
foreach(const QString& g, s.childGroups()) {
Profile p;
s.beginGroup(g);
p.load(s);
s.endGroup();
qDebug() << p.name();
qDebug() << p.title();
}
s.endGroup();
}
return 0;
}