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1   /*
2    * Copyright 2002,2004 The Apache Software Foundation.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.commons.jelly.tags.swing;
17  
18  import java.awt.Component;
19  import java.awt.Container;
20  import java.awt.Dialog;
21  import java.awt.Frame;
22  import java.util.Map;
23  import javax.swing.JDialog;
24  
25  import org.apache.commons.jelly.JellyTagException;
26  import org.apache.commons.jelly.XMLOutput;
27  import org.apache.commons.jelly.tags.core.UseBeanTag;
28  import org.apache.commons.logging.Log;
29  import org.apache.commons.logging.LogFactory;
30  
31  /***
32   * Creates a Swing Dialog.  A JDialog needs to have it's owner set in the constructor,
33   * which is why this class is needed instead of just using a BeanFactory.
34   *
35   * @author Dave Pekarek Krohn
36   * @version $Revision: 155420 $
37   */
38  public class DialogTag extends UseBeanTag implements ContainerTag {
39  
40      /*** The Log to which logging calls will be made. */
41      private static final Log log = LogFactory.getLog(DialogTag.class);
42  
43      public DialogTag() {
44          super(JDialog.class);
45      }
46  
47      // Implementation methods
48      //-------------------------------------------------------------------------
49  
50      /***
51       * Creates a JDialog.  The constructor used depends on the value of the owner attribute.
52       */
53      protected Object newInstance(Class theClass, Map attributes, XMLOutput output)
54      throws JellyTagException {
55          Object owner = attributes.remove( "owner" );
56          if (owner instanceof Frame) {
57              return new JDialog((Frame) owner);
58          } else if (owner instanceof Dialog) {
59              return new JDialog((Dialog) owner);
60          } else {
61              return new JDialog();
62          }
63      }
64  
65      // ContainerTag interface
66      //-------------------------------------------------------------------------
67  
68      /***
69       * Adds a component to the dialog.
70       */
71      public void addChild(Component component, Object constraints) {
72          Container contentPane = ((JDialog) getBean()).getContentPane();
73          if (constraints != null) {
74              contentPane.add( component, constraints );
75          } else {
76              contentPane.add( component );
77          }
78      }
79  }
80