OpenInputDialogHandler


1   /*******************************************************************************
2    * Copyright (c) 2006 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    *
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.ui.internal.cheatsheets.handlers;
12  
13  import org.eclipse.core.commands.AbstractHandler;
14  import org.eclipse.core.commands.ExecutionEvent;
15  import org.eclipse.core.commands.ExecutionException;
16  import org.eclipse.jface.dialogs.InputDialog;
17  import org.eclipse.jface.window.Window;
18  import org.eclipse.swt.widgets.Shell;
19  import org.eclipse.ui.IWorkbenchWindow;
20  import org.eclipse.ui.PlatformUI;
21  
22  /**
23   * A command handler to open an <code>InputDialog</code> and return the
24   * result.
25   * 
26   * @since 3.2
27   */
28  public class OpenInputDialogHandler extends AbstractHandler {
29  
30      private static final String   PARAM_ID_TITLE = "title"; //$NON-NLS-1$
31  
32      private static final String   PARAM_ID_MESSAGE = "message"; //$NON-NLS-1$
33  
34      private static final String   PARAM_ID_INITIAL_VALUE = "initialValue"; //$NON-NLS-1$
35  
36      private static final String   PARAM_ID_CANCEL_RETURNS = "cancelReturns"; //$NON-NLS-1$
37  
38      public Object   execute(ExecutionEvent event) throws ExecutionException {
39  
40          String   title = event.getParameter(PARAM_ID_TITLE);
41          String   message = event.getParameter(PARAM_ID_MESSAGE);
42          String   initialValue = event.getParameter(PARAM_ID_INITIAL_VALUE);
43  
44          IWorkbenchWindow activeWindow = PlatformUI.getWorkbench()
45                  .getActiveWorkbenchWindow();
46          Shell shell = (activeWindow != null) ? activeWindow.getShell() : null;
47  
48          InputDialog dialog = new InputDialog(shell, title, message,
49                  initialValue, null);
50          int returnCode = dialog.open();
51          
52          if (returnCode == Window.CANCEL) {
53              String   cancelReturns = event.getParameter(PARAM_ID_CANCEL_RETURNS);
54              if (cancelReturns != null)
55                  return cancelReturns;
56              else
57                  throw new ExecutionException("dialog canceled"); //$NON-NLS-1$
58          }
59          
60          return dialog.getValue();
61      }
62  
63  }
64
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