added context menu with item delete action to observer wizards

de.bmotionstudio.gef.editor/src/de/bmotionstudio/gef/editor/observer/wizard/WizardObserverDeleteItemsAction.java

+/** 
+ * (c) 2009 Lehrstuhl fuer Softwaretechnik und Programmiersprachen, 
+ * Heinrich Heine Universitaet Duesseldorf
+ * This software is licenced under EPL 1.0 (http://www.eclipse.org/org/documents/epl-v10.html) 
+ * */
+
+package de.bmotionstudio.gef.editor.observer.wizard;
+
+import java.util.Arrays;
+
+import org.eclipse.core.databinding.observable.list.WritableList;
+import org.eclipse.jface.action.Action;
+import org.eclipse.jface.dialogs.MessageDialog;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.jface.viewers.TableViewer;
+import org.eclipse.swt.widgets.Display;
+
+import de.bmotionstudio.gef.editor.BMotionStudioImage;
+
+public class WizardObserverDeleteItemsAction extends Action {
+
+	private TableViewer viewer;
+
+	public WizardObserverDeleteItemsAction(TableViewer viewer) {
+		this.viewer = viewer;
+		setText("Delete selected items");
+		setImageDescriptor(BMotionStudioImage.getImageDescriptor(
+				"org.eclipse.ui", "$nl$/icons/full/etool16/delete_edit.gif"));
+	}
+
+	@Override
+	public void run() {
+
+		IStructuredSelection sel = (IStructuredSelection) viewer.getSelection();
+		Object[] lobjects = sel.toArray();
+
+		if (MessageDialog.openConfirm(Display.getDefault().getActiveShell(),
+				"Please confirm", "Do you realy want to delete these objects?")) {
+			WritableList list = (WritableList) viewer.getInput();
+			list.removeAll(Arrays.asList(lobjects));
+		}
+
+	}
+
+}

de.bmotionstudio.gef.editor/src/de/bmotionstudio/gef/editor/util/WizardObserverUtil.java

@@ -5,6 +5,7 @@
  * */
 package de.bmotionstudio.gef.editor.util;
 
+import org.eclipse.jface.action.MenuManager;
 import org.eclipse.jface.viewers.ColumnViewer;
 import org.eclipse.jface.viewers.TableViewer;
 import org.eclipse.swt.SWT;
@@ -18,6 +19,7 @@ import org.eclipse.swt.widgets.TableItem;
 
 import de.bmotionstudio.gef.editor.BMotionStudioSWTConstants;
 import de.bmotionstudio.gef.editor.library.AttributeTransfer;
+import de.bmotionstudio.gef.editor.observer.wizard.WizardObserverDeleteItemsAction;
 import de.bmotionstudio.gef.editor.observer.wizard.WizardObserverDragListener;
 import de.bmotionstudio.gef.editor.observer.wizard.WizardObserverDropListener;
 
@@ -33,7 +35,7 @@ public class WizardObserverUtil {
 	public static TableViewer createObserverWizardTableViewer(Composite parent) {
 
 		final TableViewer tableViewer = new TableViewer(parent, SWT.BORDER
-				| SWT.FULL_SELECTION);
+				| SWT.FULL_SELECTION | SWT.MULTI);
 		tableViewer.setData("editElement", false);
 		tableViewer.getTable().setLinesVisible(true);
 		tableViewer.getTable().setHeaderVisible(true);
@@ -47,6 +49,11 @@ public class WizardObserverUtil {
 		tableViewer.addDragSupport(operations, transferTypes,
 				new WizardObserverDragListener(tableViewer));
 
+		MenuManager manager = new MenuManager();
+		tableViewer.getControl().setMenu(
+				manager.createContextMenu(tableViewer.getControl()));
+		manager.add(new WizardObserverDeleteItemsAction(tableViewer));
+
 		tableViewer.getTable().addListener(SWT.MouseDown, new Listener() {
 			public void handleEvent(Event event) {
 				tableViewer.setData("editElement", false);