diff options
Diffstat (limited to 'plugins/org.eclipse.net4j.examples.installer/examples/org.eclipse.net4j.buddies.ui/src/org/eclipse/net4j/buddies/internal/ui/views/BuddiesDragListener.java')
-rw-r--r-- | plugins/org.eclipse.net4j.examples.installer/examples/org.eclipse.net4j.buddies.ui/src/org/eclipse/net4j/buddies/internal/ui/views/BuddiesDragListener.java | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/plugins/org.eclipse.net4j.examples.installer/examples/org.eclipse.net4j.buddies.ui/src/org/eclipse/net4j/buddies/internal/ui/views/BuddiesDragListener.java b/plugins/org.eclipse.net4j.examples.installer/examples/org.eclipse.net4j.buddies.ui/src/org/eclipse/net4j/buddies/internal/ui/views/BuddiesDragListener.java new file mode 100644 index 0000000000..ff47beca18 --- /dev/null +++ b/plugins/org.eclipse.net4j.examples.installer/examples/org.eclipse.net4j.buddies.ui/src/org/eclipse/net4j/buddies/internal/ui/views/BuddiesDragListener.java @@ -0,0 +1,64 @@ +/* + * Copyright (c) 2004 - 2012 Eike Stepper (Berlin, Germany) and others. + * All rights reserved. This program and the accompanying materials + * are 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: + * Eike Stepper - initial API and implementation + */ +package org.eclipse.net4j.buddies.internal.ui.views; + +import org.eclipse.net4j.buddies.common.IBuddy; +import org.eclipse.net4j.buddies.internal.ui.dnd.BuddiesTransfer; +import org.eclipse.net4j.util.ui.dnd.DNDDragListener; + +import org.eclipse.jface.viewers.IStructuredSelection; +import org.eclipse.jface.viewers.StructuredViewer; +import org.eclipse.swt.dnd.DND; +import org.eclipse.swt.dnd.Transfer; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Iterator; + +/** + * @author Eike Stepper + */ +public class BuddiesDragListener extends DNDDragListener<IBuddy[]> +{ + private static final Transfer[] TRANSFERS = new Transfer[] { BuddiesTransfer.INSTANCE }; + + protected BuddiesDragListener(StructuredViewer viewer) + { + super(TRANSFERS, viewer); + } + + @Override + protected IBuddy[] getObject(IStructuredSelection selection) + { + Collection<IBuddy> buddies = new ArrayList<IBuddy>(); + for (Iterator<?> it = selection.iterator(); it.hasNext();) + { + Object element = it.next(); + if (element instanceof IBuddy) + { + IBuddy buddy = (IBuddy)element; + buddies.add(buddy); + } + } + + if (buddies.isEmpty()) + { + return null; + } + + return buddies.toArray(new IBuddy[buddies.size()]); + } + + public static void support(StructuredViewer viewer) + { + viewer.addDragSupport(DND.DROP_MOVE, TRANSFERS, new BuddiesDragListener(viewer)); + } +} |