Hello,
I want to implement the functionality provided by Wicket's JIRA for
attaching images to an issue.
Essentially, when a file name is selected, it is uploaded via ajax and
the form submit button is disabled while uploading takes place. When the
upload is complete, an image thumbnail is updated and the submit button
is re-enabled.
I know how to generate a thumbnail of an image, so don't answer that
part. Also, disabling and enabling the button is an easy task. I
struggle with the file uploading part...
I tried simply adding a AjaxFormComponentUpdatingBehavior("onchange") to
my FileUploadField but all I get using that is the feedback message
"Field 'file' is required."
Any ideas?
Thanks,
Bertrand
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