Re: Idiomatic way to reference shared images?
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
tdimg 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
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch
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Re: Idiomatic way to reference shared images?
On Thu, Oct 22, 2009 at 09:15:35AM +0200, Ceki Gulcu wrote: 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. Not sure what you mean. The Image/ResourceReference solution works fine across packages and even across modules, e.g. your images could be part of a shared library and used by a component in your application. 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. Ah, I see, you want to put it there. Is there a technical reason for this or is it just a preference? Seems to me to be a lot less flexible than simply letting your images live on the classpath, since you lose the ability to later package the images in a shared JAR. jk - To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
Re: Idiomatic way to reference shared images?
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
tdimg 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
Many thanks in advance for your response,
--
Ceki Gülcü
Logback: The reliable, generic, fast and flexible logging framework for Java.
http://logback.qos.ch
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
-
To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org
For additional commands, e-mail: users-h...@wicket.apache.org
