diff --git a/org.fortiss.tooling.base/trunk/src/org/fortiss/tooling/base/editor/TreeViewerEditorBase.java b/org.fortiss.tooling.base/trunk/src/org/fortiss/tooling/base/editor/TreeViewerEditorBase.java
new file mode 100644
index 0000000000000000000000000000000000000000..a744b54e8b8cfe285c4a888701253c503a8ef0f7
--- /dev/null
+++ b/org.fortiss.tooling.base/trunk/src/org/fortiss/tooling/base/editor/TreeViewerEditorBase.java
@@ -0,0 +1,193 @@
+/*--------------------------------------------------------------------------+
+$Id$
+| |
+| Copyright 2011 ForTISS 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.fortiss.tooling.base.editor;
+
+import java.util.Collection;
+import java.util.List;
+
+import org.eclipse.emf.common.notify.Adapter;
+import org.eclipse.emf.common.notify.Notification;
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.emf.ecore.util.EContentAdapter;
+import org.eclipse.jface.action.IMenuListener;
+import org.eclipse.jface.action.IMenuManager;
+import org.eclipse.jface.action.MenuManager;
+import org.eclipse.jface.util.LocalSelectionTransfer;
+import org.eclipse.jface.viewers.TreeViewer;
+import org.eclipse.jface.viewers.Viewer;
+import org.eclipse.jface.viewers.ViewerDropAdapter;
+import org.eclipse.swt.dnd.DND;
+import org.eclipse.swt.dnd.DropTargetEvent;
+import org.eclipse.swt.dnd.Transfer;
+import org.eclipse.swt.dnd.TransferData;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Menu;
+import org.fortiss.tooling.kernel.base.EditorBase;
+import org.fortiss.tooling.kernel.services.ICompositorService;
+import org.fortiss.tooling.kernel.util.DragAndDropUtils;
+import org.fortiss.tooling.kernel.util.EObjectSelectionUtils;
+
+/**
+ * An editor which only consists of a tree viewer. It uses {@link TreeViewer},
+ * which also allows to define columns, i.e., use the tree and table at the same
+ * time.
+ *
+ * @author hoelzl
+ * @author $Author$
+ * @version $Rev$
+ * @levd.rating RED Rev:
+ */
+public abstract class TreeViewerEditorBase<T extends EObject> extends
+ EditorBase<T> {
+
+ /** Stores the {@link TreeViewer}. */
+ private TreeViewer treeViewer;
+
+ /** The adapter used for dealing with changes of the */
+ private final Adapter editedObjectChanged = new EContentAdapter() {
+ @Override
+ public void notifyChanged(Notification notification) {
+ super.notifyChanged(notification);
+ if (notification.getEventType() != Notification.REMOVING_ADAPTER) {
+ treeViewer.refresh(true);
+ }
+ }
+ };
+
+ /** {@inheritDoc} */
+ @Override
+ public void createPartControl(Composite parent) {
+ treeViewer = new TreeViewer(parent);
+
+ setupTreeViewer(treeViewer);
+
+ treeViewer.addDropSupport(
+ DND.DROP_COPY | DND.DROP_MOVE | DND.DROP_LINK,
+ new Transfer[] { LocalSelectionTransfer.getTransfer() },
+ new TreeDropAdapter(treeViewer));
+
+ treeViewer.setInput(editedObject);
+ getEditorSite().setSelectionProvider(treeViewer);
+
+ editedObject.eAdapters().add(editedObjectChanged);
+
+ initContextMenu();
+ }
+
+ /**
+ * Initializes context menu support.
+ */
+ protected void initContextMenu() {
+ MenuManager menuManager = new MenuManager("#PopupMenu");
+ menuManager.setRemoveAllWhenShown(true);
+ menuManager.addMenuListener(new IMenuListener() {
+ @Override
+ public void menuAboutToShow(IMenuManager manager) {
+ // TODO: add context menu support
+ }
+ });
+ Menu menu = menuManager.createContextMenu(treeViewer.getTree());
+ treeViewer.getTree().setMenu(menu);
+ getSite().registerContextMenu(menuManager, treeViewer);
+ }
+
+ /** {@inheritDoc} */
+ @Override
+ public void dispose() {
+ editedObject.eAdapters().remove(editedObjectChanged);
+ super.dispose();
+ }
+
+ /** Returns the elements currently selected in the tree. */
+ protected Collection<EObject> getTreeSelection() {
+ List<EObject> result = EObjectSelectionUtils
+ .getEObjectElements(treeViewer.getSelection());
+ if (result.isEmpty()) {
+ result.add(editedObject);
+ }
+ return result;
+ }
+
+ /**
+ * This method is used to configure the tree viewer, e.g. set the content
+ * provider, and the label provider.
+ */
+ protected abstract void setupTreeViewer(TreeViewer treeViewer);
+
+ /** {@inheritDoc} */
+ @Override
+ public void setFocus() {
+ treeViewer.getTree().setFocus();
+ }
+
+ /** The drop adapter for the tree. */
+ private class TreeDropAdapter extends ViewerDropAdapter {
+
+ /** Remember the last target. */
+ Object lastTarget = null;
+
+ /** Constructor. */
+ private TreeDropAdapter(Viewer viewer) {
+ super(viewer);
+ setExpandEnabled(true);
+ }
+
+ /**
+ * {@inheritDoc}
+ * <p>
+ * Hook this method to set a "valid" details field.
+ */
+ @Override
+ public void dragEnter(DropTargetEvent event) {
+ event.detail = DND.DROP_COPY;
+ super.dragEnter(event);
+ }
+
+ /** {@inheritDoc} */
+ @Override
+ public boolean validateDrop(Object target, int operation,
+ TransferData transferType) {
+ if (target == null) {
+ target = treeViewer.getInput();
+ }
+ lastTarget = target;
+ return true;
+ }
+
+ /** {@inheritDoc} */
+ @Override
+ public boolean performDrop(Object data) {
+ if (lastTarget instanceof EObject) {
+ final EObject dropped = DragAndDropUtils
+ .extractDroppedEObject(data);
+ if (ICompositorService.INSTANCE.canCompose(
+ (EObject) lastTarget, dropped, null)) {
+ TreeViewerEditorBase.this.executeCommand(new Runnable() {
+ @Override
+ public void run() {
+ ICompositorService.INSTANCE.compose(
+ (EObject) lastTarget, dropped, null);
+ }
+ });
+ return true;
+ }
+ }
+ return false;
+ }
+ }
+}
diff --git a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/util/DragAndDropUtils.java b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/util/DragAndDropUtils.java
new file mode 100644
index 0000000000000000000000000000000000000000..4137f3178acb2b091deb7f473f41f06ec01d86db
--- /dev/null
+++ b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/util/DragAndDropUtils.java
@@ -0,0 +1,45 @@
+/*--------------------------------------------------------------------------+
+$Id$
+| |
+| Copyright 2011 ForTISS 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.fortiss.tooling.kernel.util;
+
+import org.eclipse.emf.ecore.EObject;
+import org.eclipse.jface.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.fortiss.tooling.kernel.services.IPrototypeService.Prototype;
+
+/**
+ * Utility methods for drag and drop support.
+ *
+ * @author hoelzlf
+ * @author $Author$
+ * @version $Rev$
+ * @levd.rating RED Rev:
+ */
+public final class DragAndDropUtils {
+
+ /** Extracts the EObject contained in the given drop object. */
+ public static EObject extractDroppedEObject(Object data) {
+ if (data instanceof IStructuredSelection) {
+ return EObjectSelectionUtils.getFirstElement((ISelection) data);
+ }
+ if (data instanceof Prototype) {
+ return ((Prototype) data).getPrototypeCopy();
+ }
+ return null;
+ }
+}
diff --git a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/util/EObjectSelectionUtils.java b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/util/EObjectSelectionUtils.java
index 146f1a58bd5fd69bfc57e39c4564661146c44b75..08f86437c663bfb7693c6a50b8aa1e3b3edffe6f 100644
--- a/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/util/EObjectSelectionUtils.java
+++ b/org.fortiss.tooling.kernel/trunk/src/org/fortiss/tooling/kernel/util/EObjectSelectionUtils.java
@@ -17,9 +17,13 @@ $Id$
+--------------------------------------------------------------------------*/
package org.fortiss.tooling.kernel.util;
+import java.util.ArrayList;
+import java.util.List;
+
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.ui.PlatformUI;
/**
@@ -40,6 +44,13 @@ public final class EObjectSelectionUtils {
return getFirstElement(getCurrentSelection());
}
+ /**
+ * Returns the list of selected elements filtered for EObjects.
+ */
+ public static List<EObject> getCurrentSelectionEObjects() {
+ return getEObjectElements(getCurrentSelection());
+ }
+
/**
* Returns the first selected EObject or <code>null</code> if no EObject is
* selected.
@@ -61,4 +72,18 @@ public final class EObjectSelectionUtils {
return PlatformUI.getWorkbench().getActiveWorkbenchWindow()
.getSelectionService().getSelection();
}
+
+ /** Extracts all {@link EObject}s from the given selection. */
+ public static List<EObject> getEObjectElements(ISelection selection) {
+ List<EObject> result = new ArrayList<EObject>();
+ if (selection instanceof StructuredSelection) {
+ for (Object o : ((StructuredSelection) selection).toList()) {
+ if (o instanceof EObject) {
+ result.add((EObject) o);
+ }
+ }
+ }
+ return result;
+ }
+
}