Apache Struts 2 Documentation > Home > Guides > Tag Developers Guide > Struts Tags > UI Tags > Themes and Templates > css_xhtml theme
Added by Patrick Lightbody, last edited by Philip Luppens on Feb 01, 2008  (view change) show comment

The css_xhtml theme provides all the basics that the simple theme provides and adds several features.

Wrapping the Simple Theme

The xhtml theme uses the "wrapping" technique described by Extending Themes. Let's look at how the HTML tags are wrapped by a standard header and footer. For example, in the textfield template, text.ftl, the controlheader.ftl and controlfooter.ftl templates are wrapped around the simple template.

<#--
/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
-->
<#--include "/${parameters.templateDir}/css_xhtml/controlheader.ftl" / -->
<#include "/${parameters.templateDir}/${parameters.theme}/controlheader.ftl" />
<#include "/${parameters.templateDir}/simple/text.ftl" />
<#include "/${parameters.templateDir}/css_xhtml/controlfooter.ftl" />

CSS XHTML theme header

The header used by the HTML tags in the css_xhtml theme is complicated. Unlike the xhtml theme, the CSS theme does not use a labelposition attribute. Instead, the label position is defined by CSS rules.

<#--
/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
-->
<#include "/${parameters.templateDir}/css_xhtml/controlheader-core.ftl">
<#if parameters.labelposition?default("top") == 'top'>
<div <#rt/>
<#else>
<span <#rt/>
</#if>
<#if parameters.id?exists>id="wwctrl_${parameters.id}"<#rt/></#if> class="wwctrl">

Note that the fieldErrors, usually caused by Validation, are displayed in a div block before the element is displayed.

CSS XHTML theme footer

And the controlfooter.ftl contents:

<#--
/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
-->
${parameters.after?if_exists}<#t/>
    <#lt/>
<#if parameters.labelposition?default("top") == 'top'>
</div> <#rt/>
<#else>
</span> <#rt/>
</#if>
</div>

Special Interest

Two css_xhtml templates of special interest are head and form.

Head template

The css_xhtml head template is similar to the xhtml head template. The difference is that CSS is used to provide the layout.

<#--
/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
-->
<link rel="stylesheet" href="<@s.url value='/struts/css_xhtml/styles.css' includeParams='none' encode='false' />" type="text/css" />
<#include "/${parameters.templateDir}/simple/head.ftl" />

The head includes a style sheet.

/*
 * $Id$
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

.wwFormTable {}
.label {
    font-style:italic;
    float:left;
    width:30%
}
.errorLabel {font-style:italic; color:red; }
.errorMessage {font-weight:bold; text-align: center; color:red; }
.checkboxLabel {}
.checkboxErrorLabel {color:red; }
.required {color:red;}

Form template

The css_xhtml form template is almost exactly like the xhtml form template, including support for Pure JavaScript Client Side Validation. The difference is that instead of printing out an opening and closing <table> element, there are no elements. Instead, the CSS rules for the individual HTML tags are assumed to handle all display logic. However, as noted, client-side validation is still supported.