Bug 294750 [Contributions] Allow a handler to update MUIItems
A handler for a command should be able to update text or tooltips on UIItems that point to the command. ex: in 3.x we have this pattern. 1) each item registers as a UIElement for a command 2) the command service can handle a request to refresh all UIElements for a command 3) changing handlers causes a refresh request 4) the client code can also request a refresh We need a similar story for e4 that would allow the active handler to update the appropriate items. It is a little more complicated in e4 as depending on your location (part of the hierarchy you are requesting from) you will potentially have different handlers applicable to different MUIItems. PW
bundles/org.eclipse.e4.ui.workbench.renderers.swt/src/org/eclipse/e4/workbench/ui/renderers/swt/ToolItemRenderer.java
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 * Copyright (c) 2009 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
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 * Contributors:
 *     IBM Corporation - initial API and implementation
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package org.eclipse.e4.workbench.ui.renderers.swt;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;
import javax.inject.Inject;
import org.eclipse.core.commands.ParameterizedCommand;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.e4.core.commands.ECommandService;
import org.eclipse.e4.core.commands.EHandlerService;
import org.eclipse.e4.core.services.IContributionFactory;
import org.eclipse.e4.core.services.Logger;
import org.eclipse.e4.core.services.annotations.PostConstruct;
import org.eclipse.e4.core.services.annotations.PreDestroy;
import org.eclipse.e4.core.services.context.IEclipseContext;