Mercurial > projects > dwt-mac
view dwt/dnd/DragSourceListener.d @ 100:c2f1ba00473b
Ported dwt.dnd.DropTargetAdapter
author | Jacob Carlborg <doob@me.com> |
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date | Wed, 31 Dec 2008 13:17:35 +0100 |
parents | 5acb3346c926 |
children |
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/******************************************************************************* * Copyright (c) 2000, 2003 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 * * Port to the D programming language: * Jacob Carlborg <doob@me.com> *******************************************************************************/ module dwt.dnd.DragSourceListener; import dwt.dwthelper.utils; import dwt.internal.DWTEventListener; import dwt.dnd.DragSourceEvent; /** * 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 : DWTEventListener { /** * 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) * </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); }