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
int pos = getControlContentAdapter().getCursorPosition(getControl());
					
					
					
					if (pos > 0) {
						asyncRecomputeProposals(filterText);
					}
					break;
				default:
					
					
					
					if (Character.isDefined(key)) {
						if (filterStyle == FILTER_CUMULATIVE) {
							filterText = filterText + String.valueOf(key);
						} else if (filterStyle == FILTER_CHARACTER) {
							filterText = String.valueOf(key);
						}
						
						asyncRecomputeProposals(filterText);
					}
					break;
				}
			}
		}
		/*
		 * Internal class used to implement the secondary popup.
		 */
		private class InfoPopupDialog extends PopupDialog {