setProperty value by object and propertyname

themts

Hey guys,

I have the following problem:
I want to create a textEdit-component which implements a two-way binding.

Lets say I have a c++ object with several Q_PROPERTYs.
Now I need a textEdit for each of this properties with a two way binding.
Normally I can do something like this for each text Element:

1. 
TextInput: {
    id: t1
    ...
    onTextChanged: myObject.setText1(text)
}

Connections {
    target: myObject
    onTextChanged1: t1.text = myObject.text1
}

My idea is to pass an object and a property name to a custom TextInput.
So I want to do all the other handling inside my custom component.

CustomComponent {
    target: targetObject
    property: text1
}

How can I set a property by name and object in qml?
Is there a function like setProperty(object, "property") within qml?

CU
mts

jeremy_k

@themts said in setProperty value by object and propertyname:

How can I set a property by name and object in qml?
Is there a function like setProperty(object, "property") within qml?

object[property] = value works, where property is a string representation of the property name.
eg: t1["text"] = myObject.text1

p3c0

@themts

Is there a function like setProperty(object, "property") within qml?

AFAIK no such way in QML. But if CustomComponent is a registered C++ class then you can use setProperty function for that object.

themts

Hi

I could find a solution that is working for me quite well:

    property alias target : targetBinding.target
    property alias property : targetBinding.property

    Binding {
        id: targetBinding
    }

    Binding {
        id: sourceBinding
        target: item1
        property: "text"
        value: (item1.property != "") && (item1.target != undefined) ? item1.target[item1.property] : ""
    }

    onEditingFinished: {
        if (property == "")
            return;

        targetBinding.value = text;
    }

It would be nice if qt will get a built-in two way binding in future (see wpf).

CU

jeremy_k

@themts said in setProperty value by object and propertyname:

It would be nice if qt will get a built-in two way binding in future (see wpf).

You're not alone in this wish.