[SOLVED] QML ListView behaviour when ListModel updates

beemaster

Hi everyone,

I have a ListView
@ListView {
id: listView
anchors.fill: parent
model: model
delegate: delegate
orientation: ListView.Horizontal
snapMode: ListView.SnapOneItem
highlightRangeMode: ListView.StrictlyEnforceRange
}@

Each item in ListView is fullscreen:
@Component {
id: delegate
Rectangle {
width: component.width
height: component.height
Text {
anchors.centerIn: parent
font.pointSize: 40
text: number
}
}
}@

At start model has just one item:
@ListModel {
id: model
ListElement {
number: 10
}
}@

I want to modify model dynamically later on, like this:
@Keys.onLeftPressed: {
model.insert(0, {"number":leftIndex})
--leftIndex
}

Keys.onRightPressed: {
model.append({"number":rightIndex})
++rightIndex
}@

When currentIndex is 0 and I insert to beginning, my listView automatically jumps to newly inserted item. When currentIndex is different from 0, my listView stays on the same item during insertions to both ends.
I want to keep the behaviour consistent. I want my listView to stay at currentItem during insertions to both sides. Is it possible?

Thanks!

tolszak

It's list view and list model so index 0 means beggining of the list.
So it's proper behaviour:

If you desire different behaviour you could:
@
Keys.onLeftPressed {
model.insert(0,{"number":leftIndex}
--leftIndex
if (listView.currentIndex == 0 && model.count > 1) {
listView.incrementCurrentIndex
}
}
@

beemaster

tolszak, that doesn't help, I've tried.

Surprisingly I found an answer: I can not use
@

snapMode: ListView.SnapOneItem

@

together with

@

highlightRangeMode: ListView.StrictlyEnforceRange

@

So I ended up with this ListVew:
@ListView {
id: listView
anchors.fill: parent
model: model
delegate: delegate
orientation: ListView.Horizontal
highlightRangeMode: ListView.StrictlyEnforceRange
}@