QML SwipeView or Tumbler gets reloaded upon content change - qt

Question

I'm trying to set up a crawler that holds items with signals that may change over time. Unfortunately, I realized, that upon any signal update, the whole SwipeView is reset, which causes the index to jump back to its initial state.
The following example you can run with e.g. qmlscene to see the behavior. Whenever the trigger is fired, then the currentIndex is reset and the view jumps back to 1/first.
Is there any way how I can remain at the index I was at? I tried a little with setting the index back manually, however, then I ended up in a flickering behavior.
The same happens if I put content into a Tumbler.
import QtQuick 2.12
import QtQuick.Controls 2.12
SwipeView {
id: id_swipeView
width: 100
height: 100
property int value: 0
property var pages: [{"a": "1", "b": "first"}, {"a": "2", "b": "second"}, {"a": id_swipeView.value, "b": "continuous"}]
Repeater {
model: id_swipeView.pages
Item{
Column{
Text{
text: modelData["a"]
}
Text{
text: modelData["b"]
}
}
}
}
Timer{
repeat: true; running: true; interval: 1000;
onTriggered: {id_swipeView.value += 1}
}
}

Answer 1

Instead of using a list of objects as a model, it is better to use a ListModel that allows you to handle the values in a simple way, unlike the list that is created if an element is modified.
import QtQuick 2.12
import QtQuick.Controls 2.12
SwipeView {
id: id_swipeView
width: 100
height: 100
ListModel {
id: list_model
ListElement {
a: 1
b: "first"
}
ListElement {
a: 2
b: "second"
}
ListElement {
a: 0
b: "continuous"
}
}
Repeater {
model: list_model
Item {
Column {
Text {
text: model.a
}
Text {
text: model.b
}
}
}
}
Timer {
repeat: true
running: true
interval: 1000
onTriggered: {
var value = list_model.get(2).a;
list_model.setProperty(2, "a", value + 1);
}
}
}