Programmatically edit TreeView/TreeItem

Question

Edit #2: Since it looks like a bug i already posted a bug report in the javaFx-jira. You have to have an account to have access to the issue. I will keep th

Answer 1

TreeCells (that is their content and binding to the treeItem) are updated lazily in a layout pass, that is very "late" when the next pulse is fired. A Platform.runLater(..) or any hard-coded delay may happen before or after that pulse, that's (probably) why both seem to work or not spuriously.

So another whacky hack is to manually force a re-layout on the tree after having added a new item and before programatically starting an edit:

root.getChildren().add(newItem);
tree.layout();
tree.edit(newItem);

Needless to say, that this shouldn't be necessary - the current behaviour is a severe bug and must be fixed at once (... meaning ... jdk 9)