Posted 12 January 2021, 7:37 am EST
I have a treeView where the selectedItem is used to control an editing behavior on the rest of the page. I need to be able warn the user they have unsaved changes before I let them change the TreeView.selectedItem, and even cancel the change to leave them on the current selectedItem. I see onIsCheckedChanging and onIsCollapsedChanging, but I do not see how to cancel the selection change.