The ButtonLinkRenderer is new to Tapestry 4.0. Also, as of beta-5, it
has been refactored to org.apache.tapestry.contrib.link along with the
other link renderers.
Here is the ButtonLinkRenderer class retrofitted for Tapestry 3.0. Note
that since ILinkComponent.getTarget() was not added until 4.0, the
target property will not render correctly.
public class ButtonLinkRenderer extends DefaultLinkRenderer
{
public static final ILinkRenderer SHARED_INSTANCE = new
ButtonLinkRenderer();
/**
* @see
org.apache.tapestry.link.ILinkRenderer#renderLink(org.apache.tapestry.IMarkupWriter,
org.apache.tapestry.IRequestCycle,
org.apache.tapestry.components.ILinkComponent)
*/
public void renderLink(IMarkupWriter writer, IRequestCycle cycle,
ILinkComponent linkComponent)
{
if (cycle.getAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME)
!= null)
{
throw new
ApplicationRuntimeException(Tapestry.getMessage("AbstractLinkComponent.no-nesting"),
linkComponent, null, null);
}
cycle.setAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME,
linkComponent);
ILink link = linkComponent.getLink(cycle);
writer.begin("button");
writer.attribute("type", "button");
if (linkComponent.isDisabled())
{
writer.attribute("disabled", "disabled");
}
// String target = linkComponent.getTarget();
String target = null;
String url = constructURL(link, linkComponent.getAnchor(), cycle);
String pattern = (target == null) ? "window.location=''{0}''" :
"window.open(''{0}'', ''{1}'')";
String onclick = MessageFormat.format(pattern, new Object[] {
url , target });
writer.attribute("onclick", onclick);
linkComponent.renderAdditionalAttributes(writer, cycle);
beforeBodyRender(writer, cycle, linkComponent);
IMarkupWriter wrappedWriter = writer.getNestedWriter();
linkComponent.renderBody(wrappedWriter, cycle);
wrappedWriter.close();
afterBodyRender(writer, cycle, linkComponent);
writer.end();
cycle.removeAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME);
}
}
Paul
Alexandr Kundirenko wrote:
Yes, it is for 4.0 version.
Not sure that it works for 3.0.3, try with 3x syntax
Use replace "value" attribute "expression", don't use binding
prefixes "literal" and "bean", etc
WY> I get the following exception:
WY> Attribute "value" must be declared for element type "binding"
WY> Is the following implementation for Tapestry 4? I am using 3.03. And
WY> also, I think it should be beans.buttonRenderer.
WY> On 9/1/05, Alexandr Kundirenko <[EMAIL PROTECTED]> wrote:
>> There is simpler way:
>>
>> <bean name="buttonRenderer"
WY> class="org.apache.tapestry.link.ButtonLinkRenderer"/>
>>
>> <component id="cancel" type="PageLink">
>> <binding name="page" value="literal:TargetPage"/>
>> <binding name="renderer" value="bean:buttonRenderer"/>
>> </component>
>>
>> --
>> aku
>>
>> wctc> With CSS,
>> wctc> you can make a <a> look like a button ...
>>
>> wctc> -----Original Message-----
>> wctc> From: Waimun Yeow [mailto:[EMAIL PROTECTED]
>> wctc> Sent: donderdag 1 september 2005 12:27
>> wctc> To: [email protected]
>> wctc> Subject: PageLink with button
>>
>> wctc> Hi,
>>
>> wctc> How do I create a PageLink with a button instead of the regular
WY> <a>
>> wctc> href?
>>
>> wctc> If there's anyone who have done it, please advise....
>>
>>
>> wctc> Tks,
>>
>>
>> wctc> waimun
>>
>>
>> wctc>
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>>
>>
>> wctc>
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>>
>>
>>
>>
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