Bug 15844 [Exception Handling] SelectionChange events and NPE
Build 20020508 Due to new global actions there are now more objects listening to selection changes send out by a JFace viewer. We now had the case that one of the listener generated a NPE. As a result all listeners registered after that one didn't receive the selection change event. StructuredViewers should be more fault tolorant to exceptions when informing listeners.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/CheckboxTableViewer.java
public void removeCheckStateListener(ICheckStateListener listener) {
	checkStateListeners.remove(listener);
}
/**
 * Sets to the given value the checked state for all elements in this viewer.
 *
 * @param state <code>true</code> if the element should be checked,
 *  and <code>false</code> if it should be unchecked
 */
public void setAllChecked(boolean state) {
	TableItem[] children = getTable().getItems();
	for (int i = 0; i < children.length; i++) {
		TableItem item = children[i];
		item.setChecked(state);
	}
}
/**
 * Sets to the given value the grayed state for all elements in this viewer.
 *
 * @param state <code>true</code> if the element should be grayed,
 *  and <code>false</code> if it should be ungrayed
 */
public void setAllGrayed(boolean state) {
	TableItem[] children = getTable().getItems();
	for (int i = 0; i < children.length; i++) {
		TableItem item = children[i];
		item.setGrayed(state);
	}
}
/* (non-Javadoc)