Re: Idiomatic way to reference shared images?

2009-10-22 Thread Ceki Gulcu

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?

2009-10-22 Thread John Krasnay
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


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Idiomatic way to reference shared images?

2009-10-21 Thread Ceki Gulcu

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);
  }
}

In markup, I attempt to access the images as

   wicket:link
 tdimg src=/resources/help.gif align=top//td
   /wicket:link

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?

Many thanks in advance for your response,

--
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?

2009-10-21 Thread John Krasnay
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


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