/*
    * Copyright (C) 2007-2012 Argeo GmbH
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    *         http://www.apache.org/licenses/LICENSE-2.0
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.argeo.slc.client.ui.dist.commands;
  
  import org.argeo.slc.client.ui.dist.DistPlugin;
  import org.argeo.slc.client.ui.dist.views.ArtifactsBrowser;
  import org.eclipse.core.commands.AbstractHandler;
  import org.eclipse.core.commands.Command;
  import org.eclipse.core.commands.ExecutionEvent;
  import org.eclipse.core.commands.ExecutionException;
  import org.eclipse.core.commands.State;
  import org.eclipse.ui.PlatformUI;
  import org.eclipse.ui.commands.ICommandService;
  import org.eclipse.ui.handlers.HandlerUtil;
  
  /** Change visible state of the ArtifactBrower size column */
  public class ShowSizeColumn extends AbstractHandler {
  	public final static String ID = DistPlugin.PLUGIN_ID + ".showSizeColumn";
  
  	public Object execute(ExecutionEvent event) throws ExecutionException {
  		ArtifactsBrowser view = (ArtifactsBrowser) HandlerUtil
  				.getActiveWorkbenchWindow(event).getActivePage()
  				.findView(ArtifactsBrowser.ID);
  
  		ICommandService service = (ICommandService) PlatformUI.getWorkbench()
  				.getService(ICommandService.class);
  		Command command = service.getCommand(ID);
  		State state = command.getState(ID + ".toggleState");
  
  		boolean wasVisible = (Boolean) state.getValue();
  		view.setSizeVisible(!wasVisible);
  		state.setValue(!wasVisible);
  		return null;
  	}
  }