| /******************************************************************************* |
| * Copyright (c) 2000, 2004 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; |
| |
| /* |
| * Drag and Drop example snippet: determine native data types available (motif only) |
| * |
| * For a list of all SWT example snippets see |
| * http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/dev.html#snippets |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.dnd.*; |
| import org.eclipse.swt.internal.*; |
| import org.eclipse.swt.internal.motif.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| |
| public class Snippet158 extends ByteArrayTransfer { |
| |
| private static Snippet158 _instance = new Snippet158(); |
| private int[] ids; |
| private String[] names; |
| |
| public static void main(String[] args) { |
| Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout()); |
| final Table control = new Table(shell, SWT.NONE); |
| TableItem item = new TableItem(control, SWT.NONE); |
| item.setText("Drag data over this site to see the native transfer type."); |
| DropTarget target = new DropTarget(control, DND.DROP_DEFAULT | DND.DROP_COPY | DND.DROP_LINK | DND.DROP_MOVE); |
| target.setTransfer(new Transfer[] {Snippet158.getInstance()}); |
| target.addDropListener(new DropTargetAdapter() { |
| public void dragEnter(DropTargetEvent event) { |
| String ops = ""; |
| if ((event.operations & DND.DROP_COPY) != 0) ops += "Copy;"; |
| if ((event.operations & DND.DROP_MOVE) != 0) ops += "Move;"; |
| if ((event.operations & DND.DROP_LINK) != 0) ops += "Link;"; |
| control.removeAll(); |
| TableItem item1 = new TableItem(control,SWT.NONE); |
| item1.setText("Allowed Operations are "+ops); |
| |
| if (event.detail == DND.DROP_DEFAULT) { |
| if ((event.operations & DND.DROP_COPY) != 0) { |
| event.detail = DND.DROP_COPY; |
| } else if ((event.operations & DND.DROP_LINK) != 0) { |
| event.detail = DND.DROP_LINK; |
| } else if ((event.operations & DND.DROP_MOVE) != 0) { |
| event.detail = DND.DROP_MOVE; |
| } |
| } |
| |
| TransferData[] data = event.dataTypes; |
| for (int i = 0; i < data.length; i++) { |
| int id = data[i].type; |
| String name = getNameFromId(id); |
| TableItem item2 = new TableItem(control,SWT.NONE); |
| item2.setText("Data type is "+id+" "+name); |
| } |
| } |
| }); |
| |
| shell.setSize(400, 400); |
| shell.open(); |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| display.dispose(); |
| } |
| |
| public static Snippet158 getInstance () { |
| return _instance; |
| } |
| Snippet158() { |
| } |
| public void javaToNative (Object object, TransferData transferData) { |
| } |
| public Object nativeToJava(TransferData transferData){ |
| return "Hello World"; |
| } |
| protected String[] getTypeNames(){ |
| return names; |
| } |
| static int shellHandle; |
| protected int[] getTypeIds(){ |
| if (ids == null) { |
| Display display = Display.getCurrent(); |
| int widgetClass = OS.topLevelShellWidgetClass (); |
| shellHandle = OS.XtAppCreateShell (null, null, widgetClass, display.xDisplay, null, 0); |
| OS.XtSetMappedWhenManaged (shellHandle, false); |
| OS.XtRealizeWidget (shellHandle); |
| |
| ids = new int[840]; |
| names = new String[840]; |
| for (int i = 0; i < ids.length; i++) { |
| ids[i] = i+i; |
| names[i] = getNameFromId(i+1); |
| } |
| } |
| return ids; |
| } |
| static String getNameFromId(int id) { |
| int xDisplay = OS.XtDisplay (shellHandle); |
| int ptr = 0; |
| try { |
| ptr = OS.XmGetAtomName(xDisplay, id); |
| } catch (Throwable t) { |
| } |
| if (ptr == 0) return "invalid "+id; |
| int length = OS.strlen(ptr); |
| byte[] nameBuf = new byte[length]; |
| OS.memmove(nameBuf, ptr, length); |
| OS.XFree(ptr); |
| return new String(Converter.mbcsToWcs(null, nameBuf)).toLowerCase(); |
| } |
| } |