Hello,
can you please give some hint how to create component, which does not nead
markup and to which I can add children ?
The intent is to be able create pages without need to create html for such
pages at all - basically rendering driven by component structure and not
by markup.
I've tryied it like following and it is working for me now, but most
probably there is better / more elegant way or some problem I do not see.
Thank you in advance for any hints and comments.
saki
public class Panel extends WebMarkupContainer
{
...
/**
* Renders this container.
*/
protected void onRender(MarkupStream markupStream)
{
Response response = getResponse();
boolean writeTag = !getRenderBodyOnly();
if (writeTag) {
response.write(markupStream.get().toCharSequence());
}
layoutManager.startLayout(response);
int currentIndex = markupStream.getCurrentIndex();
int iteration = 0;
// Iterate through children on this container
for (Iterator iterator = iterator(); iterator.hasNext();)
{
iteration ++;
// Get next child component
final Component component = (Component)iterator.next();
if (component == null)
{
throw new WicketRuntimeException(
"Loop item is null. Probably
the number of loop iterations were
changed between onBeginRequest and render time.");
}
layoutManager.startLayout(response, component);
// Rewind to start of markup for kids
markupStream.setCurrentIndex(currentIndex);
if (component instanceof Panel) {
component.render(markupStream);
} else if (component instanceof
WebMarkupContainerWithAssociatedMarkup) {
WebMarkupContainerWithAssociatedMarkup
markupContainer =
(WebMarkupContainerWithAssociatedMarkup) component;
markupContainer.renderAssociatedMarkup("panel",
"exceptionMessage");//(" saki exceptionMessage");
} else if (component instanceof MarkupContainer) {
MarkupContainer markupContainer =
(MarkupContainer) component;
MarkupStream markupStream2 =
getApplication().getMarkupCache().getMarkupStream(markupContainer);
component.render(markupStream2);
} else {
component.render();
}
layoutManager.endLayout(response, component);
}
layoutManager.endLayout(response);
markupStream.setCurrentIndex(currentIndex);
while (!markupStream.atCloseTag())
markupStream.next();
if (writeTag) {
response.write(markupStream.get().toCharSequence());
}
}
...
}
Notes:
- layoutManager is just just to write some markup around children (for
example table)
- html files must be created for components whose markup is normally in
parent component (eg. TextField, Form, ...).
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