Shawn Church wrote:
ExternalLink is used to provide a URL which may be used outside the
context of a Tapestry webapp to link back into the webapp. [ ... ]
See, I told you I was a newbie! :-)
I think what you are wanting is to provide links to external
(non-Tapestry) applications from within a Tapestry app.
Exactly.
There are many
ways to do this, but two common ways are to either use the @Any
component to build the URL within your .html (or .page) directly, or a
possibly cleaner way is to build the URL strings within your .java page
handler.
Using the @Any solution:
<a jwcid="@Any" href='ognl: "http://maps.yahoo.com/maps_result?addr="; +
location.address.line + "&csz=" + location.address.city'> Yahoo Map </a>
Thank you. The @Any solution is perhaps what I was looking for.
Using the .java method solution:
public String getYahooUrl()
{
String url = "http://maps.yahoo.com/maps_result";;
url += "?addr=" + getLocation().getAddress().getLine();
url += "&csz=" + getLocation().getAddress().getCity();
return url;
}
<span jwcid="@Insert" value="ognl:yahooUrl" raw="ognl:true"/>
I'm not certain about this Java method. It seems to me that it would
just output the URL into the document. Is there a way to get this into
an href attribute?
The other question about the Java method is whether this is considered
good practice in Tapestry. It seems to me a matter of moving
presentation data out to the template and back into the Java code, which
seems counter to most other MVC systems I've seen, especially as I would
need to add methods for every new URL format needed.
So when you say that this is "possibly cleaner", is the Tapestry
experience that it's better to keep the templates clean and offload some
formatting into Java? I'm surprised if this is the case, but would love
to hear the arguments in favor of it.
Thank you very much for your helpful response.
-- Scott
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