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
asyncRecomputeProposals(filterText);
							}
						}
						break;
					
					
					
					default:
						if (e.keyCode != SWT.CAPS_LOCK && e.keyCode != SWT.MOD1
								&& e.keyCode != SWT.MOD2
								&& e.keyCode != SWT.MOD3
								&& e.keyCode != SWT.MOD4) {
							close();
						}
						return;
					}
					
					
					if (newSelection >= 0) {
						selectProposal(newSelection);
					}
					return;
				}
				
				
				
				switch (key) {
				case SWT.ESC:
					e.doit = false;
					close();