| // Copyright 2009, 2010, 2011 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.components; |
| |
| import org.apache.tapestry5.BindingConstants; |
| import org.apache.tapestry5.ComponentResources; |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.annotations.Parameter; |
| import org.apache.tapestry5.ioc.annotations.Inject; |
| import org.apache.tapestry5.services.javascript.JavaScriptSupport; |
| |
| /** |
| * Triggers an arbitrary event during rendering. This is often useful to add JavaScript |
| * to a page or a component (via calls to the {@link JavaScriptSupport} environmental). |
| * |
| * @since 5.2.0 |
| * @tapestrydoc |
| */ |
| public class Trigger |
| { |
| @Parameter(defaultPrefix = BindingConstants.LITERAL) |
| private String event; |
| |
| @Inject |
| private ComponentResources resources; |
| |
| String defaultEvent() |
| { |
| return this.resources.getId(); |
| } |
| |
| boolean beginRender(MarkupWriter writer) |
| { |
| this.resources.triggerEvent(this.event, new Object[] |
| { writer }, null); |
| return false; |
| } |
| |
| } |