/**
* Sets the input for the tree to a particular item in the tree.
*
* <p>The current input and expansion state are saved in a frame and added to the drill stack.
* Then the input for the tree is changed to be <code>newInput</code>. The expansion state for the
* tree is maintained during the operation.
*
* <p>On return the client may revert back to the previous state by invoking <code>goBack</code>
* or <code>goHome</code>.
*
* @param newInput the new input element
*/
public void goInto(Object newInput) {
// If we can drill ..
if (canExpand(newInput)) {
// Save the old state.
Object oldInput = fChildTree.getInput();
List expandedList = getExpanded();
fDrillStack.add(new DrillFrame(oldInput, "null", expandedList)); // $NON-NLS-1$
// Install the new state.
fChildTree.setInput(newInput);
expand(expandedList);
updateNavigationButtons();
}
}
