Question

I’m implementing a treeView for the first time in Google Apps Script and running into some trouble.

This handler does get fired ok when selecting a treeItem

tree.addSelectionHandler(app.createServerSelectionHandler("restClick"));

I was expecting to be able to identify the selected item in the handler

function restClick(e) {
  var app = UiApp.getActiveApplication();
  Logger.log(e.parameter.source);
  var tree = app.getElementById(e.parameter.source);
  Logger.log(tree.getId());
  return app;
}

The above code identifies the tree object correctly – however I can’t figure out how to get the selectedItem – there is no appropriate method such as getSelectedItem() and there is no useful property of (e) that helps either

Thank you.

Answer 1

This is a known issue. You should follow the link and star this issue to keep track of updates and kind of vote for it. On the issue comments there’s an explanation for a somewhat cumbersome workaround, if this is really important to you.

The “tree object” should work like all others widgets on Apps Script, having a setName method where we could get on the handler event parameters item name or index (after adding the tree as a callback element in the handler using the addCallbackElement) e.g.

tree.setName('mytree').addSelectionHandler(app.createServerSelectionHandler("restClick").
    addCallbackElement(tree));

But this does not work, as informed in the bug report.