I was ofcourse a bit quick with my solution. I didn't test it enough
after a bit of refactoring and I now get ClassCastExceptions probably
due to the AbstractField being enhanced a bit.
I got around that by some reflection-perfection but there is probably
a better solution to getting the clientId.
New implementation of the filter looks like this:
public class FieldFocusFilter implements PartialMarkupRendererFilter {
private final JavaScriptSupport javaScriptSupport;
private final Object field;
public FieldFocusFilter(final JavaScriptSupport javaScriptSupport,
final Object field) {
this.javaScriptSupport = javaScriptSupport;
this.field = field;
}
@Override
public void renderMarkup(final MarkupWriter writer, final JSONObject reply,
final PartialMarkupRenderer renderer) {
renderer.renderMarkup(writer, reply);
final String clientId = this.getClientId();
this.javaScriptSupport.autofocus(FieldFocusPriority.OVERRIDE, clientId);
}
private String getClientId() {
String clientId;
try {
final Method method =
this.field.getClass().getMethod("getClientId");
clientId = String.valueOf(method.invoke(this.field));
} catch (final Exception e) {
clientId = null;
}
return clientId;
}
}
If someone have a better solution than the reflection-hack, please enlighten me.
/Joakim
On Sun, Mar 13, 2011 at 1:11 PM, Joakim Olsson <[email protected]> wrote:
> Hi,
>
> answering myself in case it helps someone else in the future.
>
> Inspired by a reply by Josh Canfield to another question in the same
> area I came up with the following solution.
>
> I created a PartialMarkupRendererFilter-implementation that takes a
> JavaScriptSupport and the field to put focus on:
> public class FieldFocusFilter implements PartialMarkupRendererFilter {
> private final JavaScriptSupport javaScriptSupport;
> private final AbstractField field;
>
> public FieldFocusFilter(final JavaScriptSupport javaScriptSupport,
> final AbstractField field) {
> this.javaScriptSupport = javaScriptSupport;
> this.field = field;
> }
>
> @Override
> public void renderMarkup(final MarkupWriter writer, final JSONObject reply,
> final PartialMarkupRenderer renderer) {
> renderer.renderMarkup(writer, reply);
> this.javaScriptSupport.autofocus(FieldFocusPriority.OVERRIDE,
> this.field.getClientId());
> }
> }
>
> In my page-class I then inject the PageRenderQueue, JavaScriptSupport
> and the field to put focus on:
> @Inject
> private PageRenderQueue pageRenderQueue;
>
> @Inject
> private JavaScriptSupport javaScriptSupport;
>
> @Component
> private TextField focusField;
>
> In my onAddRowFromXxx-method I add a new instance of the
> FieldFocusFilter to the PageRenderQueue:
> this.pageRenderQueue.addPartialMarkupRendererFilter(new
> FieldFocusFilter(this.javaScriptSupport, this.focusField));
>
> Thanks for the inspiration Josh. :-)
>
> Regards,
> Joakim
>
>
> On Sat, Feb 26, 2011 at 6:16 PM, Joakim Olsson <[email protected]> wrote:
>> Hi,
>>
>> I would like to get focus on the first available field in the added
>> row in an AjaxFormLoop. Is it possible in an easy way?
>>
>> Regards,
>> Joakim
>>
>
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