Change property of delegate on signal - qt

Question

I have a TreeView, and on the signal onSortIndicatorChanged I would like to set the checked property of a CheckBox inside the delegate of a TableViewColumn in my TreeView. However, I don't know how to do this.
Component {
id: mycomp
Item {
id: myitm
CheckBox {
id: mycbx
checked: true
}
}
}
TreeView {
TableViewColumn {
delegate: myDelegate
}
onSortIndicatorChanged{
// set the checked property of the delegates to true
}
}

Answer 1

You could try to add a property checked to your tree view and bind the check boxes to this property instead. Then, in the even handler, just set the value of the TreeView's property:
Component {
id: mycomp
Item {
id: myitm
CheckBox {
id: mycbx
checked: view.checked
}
}
}
TreeView {
id: view
property bool checked: false
TableViewColumn {
delegate: mycomp
}
onSortIndicatorChanged {
view.checked = true
}
}
Update:
In case you want to set a per-item checked state, you can use a similar approach where you store a function as a property of the view. In the delegate, you could call this stored function to get an item specific property value:
Component {
id: mycomp
Item {
id: myitm
CheckBox {
id: mycbx
checked: view.checkFunction ? view.checkFunction(modelData) : true
}
}
}
TreeView {
id: view
property var checkFunction: null
TableViewColumn {
delegate: mycomp
}
onSortIndicatorChanged {
view.checkFunction = function(modelData) {
// Calculate the checked state based on the modelData
return modelData.foo == "bar";
}
}
}