1 files changed, 81 insertions, 0 deletions
diff --git a/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/common/org/eclipse/swt/dnd/DragSourceListener.java b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/common/org/eclipse/swt/dnd/DragSourceListener.java
new file mode 100755
index 0000000000..0ce0aa71b2
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT Drag and Drop/common/org/eclipse/swt/dnd/DragSourceListener.java
@@ -0,0 +1,81 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2009 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.swt.dnd;
+
+import org.eclipse.swt.internal.SWTEventListener;
+
+/**
+ * The <code>DragSourceListener</code> class provides event notification to the application for DragSource events.
+ *
+ * <p>When the user drops data on a <code>DropTarget</code>, the application which defines the <code>DragSource</code>
+ * must provide the dropped data by implementing <code>dragSetData</code>.  In the dragSetData, the application
+ * must support all the data types that were specified in the DragSource#setTransfer method.</p>
+ *
+ * <p>After the drop has completed successfully or has been aborted, the application which defines the 
+ * <code>DragSource</code> is required to take the appropriate cleanup action.  In the case of a successful 
+ * <b>move</b> operation, the application must remove the data that was transferred.</p>
+ *
+ */
+public interface DragSourceListener extends SWTEventListener {
+
+/**
+ * The user has begun the actions required to drag the widget. This event gives the application 
+ * the chance to decide if a drag should be started.
+ *
+ * <p>The following fields in the DragSourceEvent apply:
+ * <ul>
+ * <li>(in)widget
+ * <li>(in)time
+ * <li>(in,out)doit
+ * </ul></p>
+ *
+ * @param event the information associated with the drag start event
+ * 
+ * @see DragSourceEvent
+ */
+public void dragStart(DragSourceEvent event);
+
+/**
+ * The data is required from the drag source.
+ *
+ * <p>The following fields in the DragSourceEvent apply:
+ * <ul>
+ * <li>(in)widget
+ * <li>(in)time
+ * <li>(in)dataType - the type of data requested.
+ * <li>(out)data    - the application inserts the actual data here (must match the dataType)
+ * <li>(out)doit    - set this to cancel the drag
+ * </ul></p>
+ *
+ * @param event the information associated with the drag set data event
+ * 
+ * @see DragSourceEvent
+ */
+public void dragSetData(DragSourceEvent event);
+
+/**
+ * The drop has successfully completed(mouse up over a valid target) or has been terminated (such as hitting 
+ * the ESC key). Perform cleanup such as removing data from the source side on a successful move operation.
+ *
+ * <p>The following fields in the DragSourceEvent apply:
+ * <ul>
+ * <li>(in)widget
+ * <li>(in)time
+ * <li>(in)doit
+ * <li>(in)detail
+ * </ul></p>
+ *
+ * @param event the information associated with the drag finished event
+ * 
+ * @see DragSourceEvent
+ */
+public void dragFinished(DragSourceEvent event);
+}