era.foss.ui.contrib.TableViewerExtensions.java Source code

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Here is the source code for era.foss.ui.contrib.TableViewerExtensions.java

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/**************************************************************************
 * ERA - Eclipse Requirements Analysis
 * ==============================================
 * Copyright (C) 2009-2013 by Georg Blaschke, Christoph P. Neumann
 * and Bernd Haberstumpf (http://era.origo.ethz.ch)
 **************************************************************************
 * Licensed under the Eclipse Public License - v 1.0 (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.eclipse.org/org/documents/epl-v10.html
 * 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 era.foss.ui.contrib;

import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;

/**
 * The Class TableViewerExtensions.
 */
public class TableViewerExtensions {

    /**
     * Requires a TableViewer. Will translate a MouseClick into the active column. Primary use-case: reset column value
     * to its default value.
     * 
     * @param tableViewer the table viewer
     */
    public static void addActiveColumnDetection(final TableViewer tableViewer) {
        tableViewer.getTable().addMouseListener(new MouseAdapter() {

            public void mouseDown(MouseEvent e) {
                int x = 0;
                for (int i = 0; i < tableViewer.getTable().getColumnCount(); i++) {
                    x += tableViewer.getTable().getColumn(i).getWidth();
                    if (e.x <= x) {
                        ((IActiveColumn) tableViewer).setActiveColumn(i);
                        break;
                    }
                }
            }

        });
    }
}