| onAddItem | fires when a new item is added into TreeView |
| onBeforeCheck | fires before an item's checkbox is checked/unchecked, cancelable |
| onBeforeDeleteItem | fires before item's deleting |
| onBeforeDrag | fires before drag operation starts, cancelable |
| onBeforeDrop | fires before an item is dragged to another target and the mouse button is released, cancelable |
| onBeforeSelect | fires before an item is selected |
| onCheck | fires before an item's checkbox is checked/unchecked |
| onClick | fires when a TreeView item has been clicked |
| onContextMenu | fires when the user clicks on treeview items with the right mouse button |
| onDblClick | fires when a TreeView item has been double clicked |
| onDeleteItem | fires when an item is deleted |
| onDragOver | fires when when a dragged item is moved over the droppable area, cancelable |
| onDrop | fires when the dragged item is dropped |
| onSelect | fires when an item is selected |
| onTextChange | fires when the item's text is changed |
| onXLE | fires when the data loading is finished and a component or data is rendered |
| onXLS | fires when XML loading started |