QML Access object property by property name string

Question

I want to create a QML binding in a repeated component. I want to bind the value of one of the elements to a property from a known object. My problem is that the name of said property that I want to bind to will be provided as a string in the component. How can I resolve the property name to an actual property that can be used as the value in a binding?

PS. If possible I guess I could pass the property directly to the repeater but then I would like to be able to convert the property to a string because I need both and don't want to pass both.

EDIT: Here's what I want:

    ListModel {
        id: settingsModel
        ListElement { title: "Bed Width"; setting: "bedWidth"; }
        ListElement { title: "Bed Length"; setting: "bedLength"; }
    }

    Component {
        id: settingsDelegate

        Item {
            width: parent.width
            height: childrenRect.height

            Label {
                id: setLabel
                text: title + ":"
                width: parent.width
            }

            TextBox {
                id: setTBox
                anchors.top: setLabel.bottom
                anchors.topMargin: 5
                width: parent.width

                Binding on text {
                    when: !setTBox.isActive
                    value: settings.setting
                }

                Binding {
                    target: settings
                    property: setting
                    value: setTBox.text
                }
            }
        }
    }

    Column {
        id: settingsColumn
        spacing: 10
        anchors.left: parent.left
        anchors.right: parent.right
        anchors.top: txtSave.bottom
        anchors.topMargin: 15

        Repeater {
            model: settingsModel
            delegate: settingsDelegate
        }
    }

@ddriver I haven't actually tried anything because I can't think of anything that might even work — Gerharddc
It doesn't have to work, it just as to illustrate intent and effort. — dtech

dtech dtech · Accepted Answer · 2016-04-03T15:56:13

My problem is that the name of said property that I want to bind to will be provided as a string in the component. How can I resolve the property name to an actual property that can be used as the value in a binding?

If you look at the documentation for Binding you will discover that the property property expects a string - property : string

So you don't have anything to resolve, that happens internally.

my problem is the "value: settings.setting" line

You could try something like settings[setting]

QML Access object property by property name string

1 Answers