package net.databinder.components;
import org.apache.wicket.ResourceReference;
import org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior;
import org.apache.wicket.markup.ComponentTag;
import org.apache.wicket.markup.html.IHeaderResponse;
/*
* Databinder: a simple bridge from Wicket to Hibernate
* Copyright (C) 2006 Nathan Hamblen nathan@technically.us
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* Attaches itself to the onchange event for a TextField or TextArea, and enhances that
* event to fire not just when focus changes but also when keyboard input pauses. This
* is effected in JavaScript, with a timer that resets when the onkeyup event fires.
* @author Nathan Hamblen
*
*/
public abstract class AjaxOnKeyPausedUpdater extends AjaxFormComponentUpdatingBehavior {
private static final ResourceReference JAVASCRIPT = new ResourceReference(
AjaxOnKeyPausedUpdater.class, "AjaxOnKeyPausedUpdater.js");
/**
* Binds to onchange.
*/
public AjaxOnKeyPausedUpdater() {
super("onchange");
}
/**
* Adds needed JavaScript to header.
*/
@Override
public void renderHead(IHeaderResponse response) {
super.renderHead(response);
response.renderJavascriptReference(JAVASCRIPT);
}
/**
* Adds JavaScript listeners for onkeyup and onblur.
*/
@Override
protected void onComponentTag(ComponentTag tag) {
super.onComponentTag(tag);
tag.put("onkeyup", "AjaxOnKeyPausedTimerReset(this);");
tag.put("onblur", "AjaxOnKeyPausedTimerCancel();");
}
}