TabBar and model update

[RomanoFX]

Hi,

I build a QML model (ListModel) width a submodel.

ListModel {
        id: modelstart
        ListElement { key: qsTr("Manuel"); option:  [
                ListElement { choice: qsTr("Délais") },
                ListElement { choice: qsTr("Date") }
            ]}
        ListElement { key: qsTr("Déclencheur"); option: [
                ListElement { choice: qsTr("Voies logiques") },
                ListElement { choice: qsTr("Voie Analogique")  },
                ListElement { choice: qsTr("(OU) Voies") },
                ListElement { choice: qsTr("(ET) Voies") },
                ListElement { choice: qsTr("Pente Voies") }
            ]
        }
        ListElement { key: qsTr("Attente"); option:  [
                ListElement { choice: qsTr("Délais") },
                ListElement { choice: qsTr("Date") }
            ]
        }
        ListElement { key: qsTr("Automatique"); option:  [
                ListElement { choice: qsTr("Délais") },
                ListElement { choice: qsTr("Date") }
            ]}
    }

I use TabBar for displaying all possibilities like this:

TabBar {
                id: tabBar2
                width: parent.width
                anchors.bottom: parent.bottom
                
                Repeater{
                    model: modelstart.get(tabBar.currentIndex).option
                    TabButton {
                        text: choice
                    }   
                }
            }

            TabBar {
                id: tabBar
                width: parent.width
                anchors.top: parent.top
                
                Repeater{
                    model:modelstart
                    TabButton {
                        text: key
                    }
                    
                }
                
            }

But the application crashes when I change the tabBar currentIndex. Should I avoid the model update like this way?

Thank you

[p3c0]

Hi @RomanoFX,
I dont have an exact answer for your question as I too haven't explored these new controls. But I suspect there could be some problem with model change in tabBar2's Repeater. Whenever the current Index of tabBar is changed the binding is re-evaluated ( can be checked usingonModelChanged signal handler ) in tabBar2's Repeater and might be the source of crash.
An alternative would be to do as follows:

// Inside tabBar

onCurrentIndexChanged: {
     for(var i=0; i<tabBar2.count; i++)
         tabBar2.itemAt(i).text = modelstart.get(currentIndex).option.get(i).choice
}

//Inside tabBar2

Repeater{
    model: 2
    TabButton { }
}

[RomanoFX]

Hi @p3c0,

Thank you for that answer