/*******************************************************************************
* Copyright (c) 2007 Exadel, Inc. and Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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
*
* Contributors:
* Exadel, Inc. and Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.common.gef.action;
import java.util.List;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.ui.actions.SelectionAction;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPart;
public abstract class DiagramSelectionAction extends SelectionAction {
public DiagramSelectionAction(IWorkbenchPart editor) {
super(editor);
}
protected abstract Command createCommand(List objects);
/**
* Returns <code>true</code> if the selected objects can
* be deleted. Returns <code>false</code> if there are
* no objects selected or the selected objects are not
* {@link EditPart}s.
*/
protected boolean calculateEnabled() {
Command cmd = createCommand(getSelectedObjects());
if (cmd == null)
return false;
return cmd.canExecute();
}
/**
* Performs the delete action on the selected objects.
*/
public void run() {
execute(createCommand(getSelectedObjects()));
}
public void update() {
IEditorPart editor = (IEditorPart)getWorkbenchPart();
if(editor == null) return;
IDiagramSelectionProvider provider = (IDiagramSelectionProvider)editor.getAdapter(IDiagramSelectionProvider.class);
if(provider == null) return;
setSelection(provider.getSelection());
}
}