| // Copyright 2010 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.corelib.mixins; |
| |
| import org.apache.tapestry5.Block; |
| import org.apache.tapestry5.ComponentResources; |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.annotations.AfterRender; |
| import org.apache.tapestry5.annotations.BeginRender; |
| import org.apache.tapestry5.annotations.Events; |
| import org.apache.tapestry5.ioc.annotations.Inject; |
| |
| /** |
| * This mixin triggers event notifcations to identify when it enters |
| * the {@link BeginRender} and {@link AfterRender} render phases. |
| * The {@link MarkupWriter} is passed as the event context. The most common use of this |
| * is to handle the "afterRender" event to generate client-side JavaScript for content |
| * just rendered via a {@link Block} (this is a common Ajax use case related to partial |
| * page rendering). |
| * |
| * @since 5.2.0 |
| */ |
| @Events( |
| { "beginRender", "afterRender" }) |
| public class RenderNotification |
| { |
| @Inject |
| private ComponentResources resources; |
| |
| void beginRender(MarkupWriter writer) |
| { |
| trigger(writer, "beginRender"); |
| } |
| |
| void afterRender(MarkupWriter writer) |
| { |
| trigger(writer, "afterRender"); |
| } |
| |
| private void trigger(MarkupWriter writer, String eventName) |
| { |
| resources.triggerEvent(eventName, new Object[] |
| { writer }, null); |
| } |
| } |