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https://issues.apache.org/jira/browse/WICKET-2049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12677045#action_12677045
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David commented on WICKET-2049:
-------------------------------
Adding the following override to a component will allow for the expected
behaviour, but it has to be added on a per-component basis:
private boolean hasHiddenAttribute = false;
@Override
public boolean isVisible() {
if(getMarkupStream()!= null) {
try{
ComponentTag tag =
getMarkupStream().getTag();
final String value =
tag.getAttributes().getString(ComponentTag.DEFAULT_WICKET_NAMESPACE +
":hidden");
System.out.println("value1: " + value);
if("hidden".equals(value)) {
hasHiddenAttribute = true;
}
} catch(MarkupException e) {
}
}
return super.isVisible() && !hasHiddenAttribute;
}
> beforeRender not called for behaviour added to ComponentTag
> -----------------------------------------------------------
>
> Key: WICKET-2049
> URL: https://issues.apache.org/jira/browse/WICKET-2049
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.3.5
> Reporter: David
> Assignee: Juergen Donnerstag
> Attachments: ComponentTagAddBehaviourBug.zip
>
>
> When adding a IMarkupFilter and adding a behaviour to the ComponentTag, the
> beforeRender method is never called, only onComponentTag will be called, but
> by then it is too late to modify the component.
> Usecase: I would like to make components hidden if the markup contains
> wicket:hidden="hidden". For this i need to modify the components visiblitiy
> depending on if the markup contains that attribute.
> The attached quickstart will never reach the
> System.out.println("beforeRender: should hide component"); in
> HiddenComponentMarkupFilter
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