TreeListBase.FocusChanging

Syntax

FocusChanging: function(sender, args);

Parameters

sender. Event source.

args. Event information:

Node. String. Key of the node, which gets focused.
OldNode. Number. Key of the node, which was focused before.
Cancel. Boolean. If this property is set to true in the event handler, focus is not changed.

Description

The FocusChanging event occurs before changing focus.

Example

Executing the example requires the SimpleTreeList component with the Tree identifier (see Example of Creating the SimpleTreeList Component).

// Set event
Tree.FocusChanging.add( function(sender, args) {
  console.log("FocusChanging event:");
  console.log(args);
});
// Initialize event
Tree.setNodeFocused(0, true);

After executing the example the FocusChanging event is added.