Run time generated property set in C++ exposed to QML

[wysota]

As far as setting an id from the C++ side I was just trying to figure out how to use your example. The objects are all created in C++ and then pushed into a QML context. Given that, using an id won't work.

You surely have a QML declaration somewhere which refers to a particular parameter (and you can do that via id), otherwise your QML code wouldn't know how to "call" a particular parameter as it might not exist.

If I use a list model I won't be able to do something like this in QML will I?

TextInput {
text: parameters.PROP_1.value
}

If you put that in a delegate referencing a particular model entry then it would be simpler:

ListView {
  id: view
  model: myModel
  // ...
 
  Row {
    width: view.width
    Text { text: model.name }
    Slider {
      minimumValue: model.minimum
      maximumValue: model.maximum
      value: model.value
      onValueChanged: model.value = value
    }
    Text { text: model.value }
  }
}

ListView {
  id: view
  model: myModel
  // ...

  Row {
    width: view.width
    Text { text: model.name }
    Slider {
      minimumValue: model.minimum
      maximumValue: model.maximum
      value: model.value
      onValueChanged: model.value = value
    }
    Text { text: model.value }
  }
}

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You could even have different types of parameters and construct a proper delegate depending on the type (e.g. putting a slider for numeric parameters and text field for textual ones).

[anda_skoa]

What you could try is a map

class Properties : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QVariantMap facts .... )
};

class Properties : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QVariantMap facts .... )
};

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where the key is the property name and the value is a Fact object

Or exposing the map directly as a context property (if it does not change during runtime).

Cheers,
_

[don@thegagnes.com]

QVariantMap - That look like exactly what I need. Thank you very much.