org.apache.tapestry5.corelib.components.AddRowLink Maven / Gradle / Ivy
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Central module for Tapestry, containing interfaces to the Java
Servlet API and all core services and components.
// Copyright 2008, 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.components;
import org.apache.tapestry5.ComponentResources;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.RenderSupport;
import org.apache.tapestry5.annotations.Environmental;
import org.apache.tapestry5.annotations.SupportsInformalParameters;
import org.apache.tapestry5.corelib.internal.AjaxFormLoopContext;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;
/**
* Used inside an {@link org.apache.tapestry5.corelib.components.AjaxFormLoop} component to spur the addition of a new
* row. Triggers a server-side {@linkplain org.apache.tapestry5.EventConstants#ADD_ROW addRow} event on the
* AjaxFormLoop, which must return the newly added object, which will be rendered in the body of the AjaxFormLoop and
* sent to the client web browser.
*/
@SupportsInformalParameters
public class AddRowLink
{
@Environmental
private AjaxFormLoopContext context;
@Inject
private JavaScriptSupport jsSupport;
@Inject
private ComponentResources resources;
void beginRender(MarkupWriter writer)
{
String id = jsSupport.allocateClientId(resources);
writer.element("a", "id", id, "href", "#");
resources.renderInformalParameters(writer);
context.addAddRowTrigger(id);
}
void afterRender(MarkupWriter writer)
{
writer.end();
}
}