Working with Checkboxes in TreeItems

I spent some time working out how to get my Tree checkboxes functional. I'm reusing the SpellsView across the display and edit view (with AbstractSpellsView:

public void createPartControl(Composite parent) {
...
if (isEditable()) {
// select checkbox
TreeColumn treeColumn11 = new TreeColumn(tree, SWT.NONE);
treeColumn11.setWidth(60);
}
TreeColumn nameCol = new TreeColumn(tree, SWT.NONE);
nameCol.setWidth(60);
nameCol.setText("Name");



The subclasses override the getInput(), the abstract view includes a switch in the create and LabelProviders to update or ignore the checkbox.