I have the following:
QString notebookid = ui->notebookid->toPlainText();
QString tagid = ui->tagid->toPlainText();
QString userid = ui->userid->toPlainText();
QString subject = ui->subject->toPlainText();
QString comment = ui->comment->toPlainText();
I need to turn them into JSON, where the key is the notebookid, tagid, etc and the value is in the ui->notebookid, etc.
What's the best way to go about doing this?
Thanks.
I'll answer this based on the fact that you were using Qt 4.8 and would not have the QJsonObject available from Qt5.
I use QJSON for exactly this. It's an easy-to-use library using QVariants to parse and serialize the data.
This would be how you'd turn your data into json using QJSON:
QVariantMap jsonMap;
jsonMap.insert("notebookid", notebookid);
jsonMap.insert("tagid", tagid);
jsonMap.insert("userid", userid );
jsonMap.insert("subject", subject );
jsonMap.insert("comment", comment);
QJson::Serializer serializer;
bool ok;
QByteArray json = serializer.serialize(jsonMap, &ok);
assert (ok);
In Qt 5, you can use QJsonObject. One way is to explicitly select the controls to serialize:
QJsonObject MyDialog::serialize() const {
QJsonObject json;
json.insert("notebookid", ui->notebookid->toPlainText());
...
return json;
}
Another way is to have a generic serializer that uses the Qt's metadata. Each named control's user property is then serialized:
QJsonObject serializeDialog(const QWidget * dialog) {
QJsonObject json;
foreach (QWidget * widget, dialog->findChildren<QWidget*>()) {
if (widget->objectName().isEmpty()) continue;
QMetaProperty prop = widget->metaObject()->userProperty();
if (! prop.isValid()) continue;
QJsonValue val(QJsonValue::fromVariant(prop.read(widget)));
if (val.isUndefined()) continue;
json.insert(widget->objectName(), val);
}
return json;
}
You can convert QJsonDocument to text as follows:
QJsonDocument doc(serializeDialog(myDialog));
QString jsonText = QString::fromUtf8(doc.toJson());
Unfortunately, Qt 5's json code requires a bunch of changes to compile under Qt 4.
