diff options
Diffstat (limited to 'bundles/org.eclipse.wst.jsdt.ui/src/org/eclipse/wst/jsdt/internal/ui/dnd/DelegatingDragAdapter.java')
-rw-r--r-- | bundles/org.eclipse.wst.jsdt.ui/src/org/eclipse/wst/jsdt/internal/ui/dnd/DelegatingDragAdapter.java | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/bundles/org.eclipse.wst.jsdt.ui/src/org/eclipse/wst/jsdt/internal/ui/dnd/DelegatingDragAdapter.java b/bundles/org.eclipse.wst.jsdt.ui/src/org/eclipse/wst/jsdt/internal/ui/dnd/DelegatingDragAdapter.java deleted file mode 100644 index 013fc004..00000000 --- a/bundles/org.eclipse.wst.jsdt.ui/src/org/eclipse/wst/jsdt/internal/ui/dnd/DelegatingDragAdapter.java +++ /dev/null @@ -1,115 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2000, 2007 IBM Corporation 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: - * IBM Corporation - initial API and implementation - *******************************************************************************/ -package org.eclipse.wst.jsdt.internal.ui.dnd; - -import java.util.ArrayList; -import java.util.Iterator; -import java.util.List; - -import org.eclipse.core.runtime.Assert; -import org.eclipse.jface.util.TransferDragSourceListener; -import org.eclipse.swt.dnd.DragSource; -import org.eclipse.swt.dnd.DragSourceEvent; -import org.eclipse.swt.dnd.DragSourceListener; -import org.eclipse.swt.dnd.Transfer; -import org.eclipse.swt.dnd.TransferData; - -/** - * A delegating drag adapter negotiates between a set of <code>TransferDragSourceListener</code>s - * On <code>dragStart</code> the adapter determines the listener to be used for any further - * <code>drag*</code> callback. - */ -public class DelegatingDragAdapter implements DragSourceListener { - - private TransferDragSourceListener[] fPossibleListeners; - private List fActiveListeners; - private TransferDragSourceListener fFinishListener; - - public DelegatingDragAdapter(TransferDragSourceListener[] listeners) { - setPossibleListeners(listeners); - } - - protected void setPossibleListeners(TransferDragSourceListener[] listeners) { - Assert.isNotNull(listeners); - Assert.isTrue(fActiveListeners == null, "Can only set possible listeners before drag operation has started"); //$NON-NLS-1$ - fPossibleListeners= listeners; - } - - /* non Java-doc - * @see DragSourceListener - */ - public void dragStart(DragSourceEvent event) { - fFinishListener= null; - boolean saveDoit= event.doit; - Object saveData= event.data; - boolean doIt= false; - List transfers= new ArrayList(fPossibleListeners.length); - fActiveListeners= new ArrayList(fPossibleListeners.length); - - for (int i= 0; i < fPossibleListeners.length; i++) { - TransferDragSourceListener listener= fPossibleListeners[i]; - event.doit= saveDoit; - listener.dragStart(event); - if (event.doit) { - transfers.add(listener.getTransfer()); - fActiveListeners.add(listener); - } - doIt= doIt || event.doit; - } - if (doIt) { - ((DragSource)event.widget).setTransfer((Transfer[])transfers.toArray(new Transfer[transfers.size()])); - } - event.data= saveData; - event.doit= doIt; - } - - /* non Java-doc - * @see DragSourceListener - */ - public void dragSetData(DragSourceEvent event) { - fFinishListener= getListener(event.dataType); - if (fFinishListener != null) - fFinishListener.dragSetData(event); - } - - /* non Java-doc - * @see DragSourceListener - */ - public void dragFinished(DragSourceEvent event) { - try{ - if (fFinishListener != null) { - fFinishListener.dragFinished(event); - } else { - // If the user presses Escape then we get a dragFinished without - // getting a dragSetData before. - fFinishListener= getListener(event.dataType); - if (fFinishListener != null) - fFinishListener.dragFinished(event); - } - } finally{ - fFinishListener= null; - fActiveListeners= null; - } - } - - private TransferDragSourceListener getListener(TransferData type) { - if (type == null) - return null; - - for (Iterator iter= fActiveListeners.iterator(); iter.hasNext();) { - TransferDragSourceListener listener= (TransferDragSourceListener)iter.next(); - if (listener.getTransfer().isSupportedType(type)) { - return listener; - } - } - return null; - } -} |