Re: Manipulate Component Markup before rendering

[Erik van Oosten]

Any component defined within the "script" area seems to be ignored by wicket

Weird. That sounds like a bug to me.

Anyway, your solution seems robust enough to me.

Regards,
    Erik.


Jürgen Lind wrote:

Hi Erik,

thank you for the suggestion. I tried that already and it did not work. Any component defined within the "script" area seems to be ignored by wicket, i.e. when I define the label in the Java code, I get an error message stating that the component was not declared in the markup file... What I am currently using

is the following code:

  protected void onRender(MarkupStream markupStream) {
    super.onRender(markupStream);

final MarkupStream associatedMarkupStream = getAssociatedMarkupStream(true);

    MarkupElement element = associatedMarkupStream.get(2);
    getResponse().write(this.replaceParameters(element.toString()));
  }

The problem here is, that I know that the markup element I want is at the second

position. However, this is not very robust ;-)

Cheers,

J.


Erik van Oosten wrote:

Hello Jürgen,

You coulld put a <span> in the markup and add a Label to it. Don't forget to call setRenderBodyOnly(true) on the label.

Regards,
   Erik.

Jürgen Lind wrote:

Hi,

I was wondering if there is some way to rewrite the component markup before

it is rendered. My setting is as follows:

1. I have a component markup file like this

   <wicket:panel>
     <script type="text/javascript">
       someFunction( "runtime parameter" );
     </script>
   </wicket:panel>

2. The matching component overrides "onComponentTagBody" and "onRender"

protected final void onComponentTagBody(final MarkupStream markupStream,

                                          final ComponentTag openTag) {
    checkComponentTag(openTag, "textarea");
    replaceComponentTagBody(markupStream, openTag, getValue());
  }

  protected void onRender(MarkupStream markupStream) {
    super.onRender(markupStream);
    super.renderAssociatedMarkup("panel", "Some error");
  }

Now, what I would like to do is to change the value for the "runtime parameter" in the onRender Method and replace it with a value that has been given to the

component when the component was constructed.

Is there any way to achieve this?

Regards,

J.

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