Update Text inside loaded qml file - qt

Question

We are having an ApplicationWindow based main.qml which is connected to our python backend via QmlElement Bridge. We have a view Slot-methods which directly return values to the qml frontend to change textfields which are children of the ApplicationWindow like the following:
ApplicationWindow {
id: mainFrame
width: 1280
height: 720
visible: true
title: qsTr("Test")
StackView {
id: stack
initialItem: loginFrame
anchors.fill: parent
}
Bridge {
id: bridge
}
Component{
id: loginFrame
ColumnLayout {
anchors.margins: 3
spacing: 3
Layout.columnSpan: 1
Layout.alignment: Qt.AlignHCenter
Text {
id: title
Layout.alignment: Qt.AlignHCenter
font.pointSize: 16
text: "Login Screen"
Layout.preferredHeight: 100
}
Button {
id: loginButton
Layout.alignment: Qt.AlignHCenter
text: "login"
highlighted: true
Material.accent: Material.Red
onClicked: {
title.text = bridge.login(username.text, password.text)
}
}
}
}
}
To reduce the size of our main.qml we decided to load the other Layouts, Components etc from different files with
Loader {
id: otherLoader
source: "other.qml"
}
How to access the Text Object inside of other.qml to update the text property from main.qml because the value is provided by the Bridge?
I already tried Accessing TextField from Another QML File but this hasn't worked.

Answer 1

The Loader creates items in not the same context as the statically create item use so cannot access the loaded item. You have several ways to access such an item.
The first and the most correct way is to use a declarative style:
Item {
id: container
anchors.fill: parent
property string someText: "press again"
Loader {
id: loader
active: false
sourceComponent: Text {
id: txt
text: container.someText
}
}
MouseArea {
anchors.fill: parent
onClicked: {
if(loader.active)
container.someText = "some text"
else
loader.active = true
}
}
}
You can create a binding in a Javascript code whenever you want:
Loader {
id: loader
active: false
sourceComponent: Text {
id: txt
Component.onCompleted: {
txt.text = Qt.binding(function() { return container.someText; })
}
}
}
Another option is using Loader.item property:
Item {
id: container
anchors.fill: parent
property string someText: "some text"
Loader {
id: loader
active: false
sourceComponent: Text {
id: txt
text: "press again"
}
}
MouseArea {
anchors.fill: parent
onClicked: {
if(loader.active)
loader.item.text = "some text"
else
loader.active = true
}
}
}