01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17: package org.apache.cocoon.woody.event;
18:
19: import org.apache.cocoon.woody.formmodel.Widget;
20:
21: /**
22: * A {@link ValueChangedEvent} that defers getting the new value from the widget
23: * until it's actually requested.
24: * <p>
25: * This allows widget validity to be checked only if a listener actually uses the
26: * value, thus avoiding unnecessary validation warnings when a user clicks an action.
27: *
28: * @author <a href="http://www.apache.org/~sylvain/">Sylvain Wallez</a>
29: * @version CVS $Id: DeferredValueChangedEvent.java 433543 2006-08-22 06:22:54Z crossley $
30: */
31: public class DeferredValueChangedEvent extends ValueChangedEvent {
32:
33: public DeferredValueChangedEvent(Widget source, Object oldValue) {
34: super (source, oldValue, null);
35: }
36:
37: public Object getNewValue() {
38: return getSourceWidget().getValue();
39: }
40: }
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