Bug 148357 [Field Assist] - API - provide access for closing the proposal popup
I think that the field assist API needs more hooks to be customizable. For example : 1) There is no way to manually close/open the popup. Most of the times, this is the easier thing for a user to ask to implement his custom behaviour. 2) There is no way to intercept keystrokes/events directed to the field. 3) There is no way to control focus.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
if (triggerKeyStroke != null) {
						
						
						if ((triggerKeyStroke.getModifierKeys() == KeyStroke.NO_KEY && triggerKeyStroke
								.getNaturalKey() == e.character)
								||
								
								
								(triggerKeyStroke.getNaturalKey() == e.keyCode && ((triggerKeyStroke
										.getModifierKeys() & e.stateMask) == triggerKeyStroke
										.getModifierKeys()))) {
							
							
							e.doit = false;
							openProposalPopup(false);
							return;
						}
					}
					/*
					 * The triggering keystroke was not invoked. Check for
					 * autoactivation characters.
					 */
					if (e.character != 0) {
						
						
						if (autoActivateString != null) {
							if (autoActivateString.indexOf(e.character) >= 0) {
								e.doit = propagateKeys;
								autoActivate();
							}