Hi John,
Thank you for your answer. I was already aware of the idiomatic way for
referencing packaged resources. It is a nice way for bundling images which are
used within a package. My question was about images shared among multiple packages.
Igor VaynBerg suggested adding a ContextImage which is what I was looking for.
Another person (alankila) suggested images defined by ContextRelativeResource.
Here is sample code:
public class MyPage extends WebPage {
public Contact() {
ContextImage ci = new ContextImage("helpImage", "images/help.gif");
add(ci);
}
}
Associated markup:
<img wicket:id="helpImage" src=""/>
Of course the interesting part is that the "help.gif" file is located as a
resource of my web-app and *not* part of WEB-INF/lib or WEB-INF/classes.
HTH,
John Krasnay wrote:
On Wed, Oct 21, 2009 at 07:57:12PM +0200, Ceki Gulcu wrote:
Hello,
I am trying to defined shared images in a Wicket application.
In my prokect, the image file "help.gif" is located under the
src/main/java/com/foo/ folder of my project. I have created an empty
class called Images.
package com.foo;
public class Images {
}
In the init() method of my web-application, I add help.gif as a shared resource:
public class MyApplication extends WebApplication {
@Override
protected void init() {
...
PackageResource pr = PackageResource.get(Images.class, "help.gif");
sharedResources.add("help.gif", pr);
}
}
I normally don't need to do anything in my app's init() method for images.
In markup, I attempt to access the images as
<wicket:link>
<td><img src="/resources/help.gif" align="top"/></td>
</wicket:link>
You would use <wicket:link> when the image is in the same package as the
markup. In this case, you would just put in <img src="help.gif"> and Wicket
will re-write the src attribute to the right value. This works well if you like
to preview your markup in a browser.
Since your images are (I think) in a different package, you should get rid of
the <wicket:link> tag.
(Actually, I think using a relative path to the right package in src might
work with <wicket:link>, but I never do it that way. See below.)
Unfortunately, this does not seem to work. However, the following
markup works just fine but it's too cumbersome to write.
<wicket:link>
<img src="resources/org.apache.wicket.Application/help.gif"/>
</wicket:link>
Reading page 229 of the Wicket in Action book, I would have thought
that the "/resources/help.gif" reference would have worked. Quoting
from the book:
The resource is then available through a stable URL (/resources/discounts),
independent of components. (page 229)
What is the idiomatic way in Wicket to reference shared images?
Here's my idiom. First, in the same package as my images, I create a class that
extends ResourceReference:
public class MyImage extends ResourceReference {
public MyImage(String name) {
super(MyImage.class, name);
}
}
Then, I attach an Image component to the <img> tag:
<img wicket:id="smiley"/>
add(new Image("smiley", new MyImage("smiley.gif")));
No code needed in Application.init(), and no <wicket:link> tags required.
jk
--
Ceki Gülcü
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