com.drgarbage.controlflowgraphfactory.actions.OrderAbstractAction.java Source code

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Here is the source code for com.drgarbage.controlflowgraphfactory.actions.OrderAbstractAction.java

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/**
 * Copyright (c) 2008-2012, Dr. Garbage Community
 *
 * 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 com.drgarbage.controlflowgraphfactory.actions;

import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.ui.actions.RetargetAction;

import com.drgarbage.controlflowgraphfactory.editors.ControlFlowGraphEditor;

/**
 * Abstract Action for ordering the vertices.
 *
 * @author Sergej Alekseev
 * @version $Revision$
 * $Id: OrderAbstractAction.java 1523 2012-04-13 14:34:24Z Sergej Alekseev $
 */
public abstract class OrderAbstractAction extends RetargetAction {

    /** Active editor*/
    protected ControlFlowGraphEditor editor = null;

    /**
     * Constructor.
     * @param actionID
     * @param text
     */
    public OrderAbstractAction(String actionID, String text) {
        super(actionID, text);
        setEnabled(false);
    }

    /**
     * Sets active Editor.
     * @param editor the editor to set
     */
    public void setActiveEditor(ControlFlowGraphEditor editor) {
        this.editor = editor;

        editor.getGraphicalViewer().addSelectionChangedListener(new ISelectionChangedListener() {

            /* (non-Javadoc)
             * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
             */
            public void selectionChanged(SelectionChangedEvent event) {
                Object o = event.getSelection();
                if (o instanceof IStructuredSelection) {
                    IStructuredSelection sel = (IStructuredSelection) o;
                    if (sel.size() > 1) {
                        setEnabled(true);
                    } else {
                        setEnabled(false);
                    }
                }
            }

        });
    }

}