| /******************************************************************************* |
| * Copyright (c) 2000, 2005 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.snippets; |
| |
| /* |
| * Make a dropped data type depend on a target item in table |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| */ |
| import java.io.*; |
| |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.dnd.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet185 { |
| |
| public static void main (String [] args) { |
| Display display = new Display (); |
| Shell shell = new Shell (display); |
| shell.setLayout(new FillLayout()); |
| Label label1 = new Label(shell, SWT.BORDER); |
| label1.setText("Drag Source"); |
| final Table table = new Table(shell, SWT.BORDER); |
| for (int i = 0; i < 4; i++) { |
| TableItem item = new TableItem(table, SWT.NONE); |
| if (i % 2 == 0) item.setText("Drop a file"); |
| if (i % 2 == 1) item.setText("Drop text"); |
| } |
| DragSource dragSource = new DragSource(label1, DND.DROP_COPY); |
| dragSource.setTransfer(new Transfer[] {TextTransfer.getInstance(), FileTransfer.getInstance()}); |
| dragSource.addDragListener(new DragSourceAdapter() { |
| @Override |
| public void dragSetData(DragSourceEvent event) { |
| if (FileTransfer.getInstance().isSupportedType(event.dataType)) { |
| File file = new File("temp"); |
| event.data = new String[] {file.getAbsolutePath()}; |
| } |
| if (TextTransfer.getInstance().isSupportedType(event.dataType)) { |
| event.data = "once upon a time"; |
| } |
| } |
| }); |
| DropTarget dropTarget = new DropTarget(table, DND.DROP_COPY | DND.DROP_DEFAULT); |
| dropTarget.setTransfer(new Transfer[] {TextTransfer.getInstance(), FileTransfer.getInstance()}); |
| dropTarget.addDropListener(new DropTargetAdapter() { |
| FileTransfer fileTransfer = FileTransfer.getInstance(); |
| TextTransfer textTransfer = TextTransfer.getInstance(); |
| @Override |
| public void dragEnter(DropTargetEvent event) { |
| if (event.detail == DND.DROP_DEFAULT) event.detail = DND.DROP_COPY; |
| } |
| @Override |
| public void dragOperationChanged(DropTargetEvent event) { |
| if (event.detail == DND.DROP_DEFAULT) event.detail = DND.DROP_COPY; |
| } |
| @Override |
| public void dragOver(DropTargetEvent event) { |
| event.detail = DND.DROP_NONE; |
| TableItem item = (TableItem)event.item; |
| if (item == null) return; |
| int itemIndex = table.indexOf(item); |
| if (itemIndex % 2 == 0) { |
| int index = 0; |
| while (index < event.dataTypes.length) { |
| if (fileTransfer.isSupportedType(event.dataTypes[index])) break; |
| index++; |
| } |
| if (index < event.dataTypes.length) { |
| event.currentDataType = event.dataTypes[index]; |
| event.detail = DND.DROP_COPY; |
| return; |
| } |
| } else { |
| int index = 0; |
| while (index < event.dataTypes.length) { |
| if (textTransfer.isSupportedType(event.dataTypes[index])) break; |
| index++; |
| } |
| if (index < event.dataTypes.length) { |
| event.currentDataType = event.dataTypes[index]; |
| event.detail = DND.DROP_COPY; |
| return; |
| } |
| } |
| } |
| |
| @Override |
| public void drop(DropTargetEvent event) { |
| TableItem item = (TableItem)event.item; |
| if (item == null) { |
| event.detail = DND.DROP_NONE; |
| return; |
| } |
| if (fileTransfer.isSupportedType(event.currentDataType)) { |
| String[] files = (String[])event.data; |
| if (files != null && files.length > 0) { |
| item.setText(files[0]); |
| } |
| } |
| if (textTransfer.isSupportedType(event.currentDataType)) { |
| String text = (String)event.data; |
| if (text != null) { |
| item.setText(text); |
| } |
| } |
| } |
| |
| }); |
| shell.setSize(300, 150); |
| shell.open (); |
| while (!shell.isDisposed ()) { |
| if (!display.readAndDispatch ()) display.sleep (); |
| } |
| display.dispose (); |
| } |
| } |