Set context property from QML

MoaMoaK

Hi, I would like to set some context properties for an object when I create it. Like for ListView or Gridview, I would like to have a model property available to the delegates.
Something like :

// MyObject.qml
Row {
    property var items
    Repeater {
        model : items
        Delegate {
            // This line is wrong and only here to get the idea
            setContextProperty( "model", items.get(index) )
        }
    }
}

// Delegate.qml
Rectangle {
    width: model.width
    height: model.height
}

I know I can define a property model in the Delegate but I would prefer not to do so and stick with the way basic views works (with the variable model as a context property).
Can some help me on how to declare such variables from QML ?
Thx, MoaMoaK

raven-worx

@MoaMoaK said in Set context property from QML:

I know I can define a property model in the Delegate but I would prefer not to do so and stick with the way basic views works (with the variable model as a context property).
Can some help me on how to declare such variables from QML ?

Even though in my opinion this is the dirty way to pollute the context property space...

You need to go around C++ to alter the qml context. So you could add a generic context property (QObject) which offers a method to add new context properties.
But anyway you need to change your coding, since the context properties are then added later then before. This needs to be considered in your QML design!

Edit:
a method which might help you is

#include <QtQml>

QQmlContext * context = qmlContext(anyObjectComingFromQml);
context->setContextProperty(name, value);

MoaMoaK

Sorry, I'm a bit late for the answer, but I found a way to do it fully in QML using Loaders (might works with other kind of items, I haven't tried) and so I can close this topic :

// MyObject.qml
Row {
    property var items
    property Component delegate
    Repeater {
        model : items
        Loader {
            sourceComponent : delegate
            // The line to add variables
            property var model : items.get(index)
        }
    }
}

// Delegate.qml
Rectangle {
    // model does exists here
    width: model.width
    height: model.height
}