Hi, I'm not sure that this really works. With your code the Ajax request will end with .csv response, not with <ajax-response>. The indicator may disappear but the .csv data wont be presented to the user/browser. It will be swallowed in the ajax response.
I think you need https://cwiki.apache.org/WICKET/ajax-update-and-file-download-in-one-blow.html On Mon, Mar 5, 2012 at 5:13 PM, Robert Szmurlo <rob...@iem.pw.edu.pl> wrote: > Hello everyone, > this my first post to the list, so I would like to give many thanks to the > authors and all contributors to the great Apache Wicket project. We silently > develop a medium sized application for over two years (at the Warsaw > University of Technology), and usually we have resolved all issues by > searching answers on this users group or by googling them. This time I would > ask you for consultation. > > My goal is to provide a download link for CSV data which will be generated > dynamically and during the time consuming generation I would like to show a > user an indicator. Like the one the IndicatingAjaxLink class do. > > My questions are: > > 1) Is the following source code created the 'wicket way' or I am breaking > somewhere else opened door? > The 'trick' I have employed, that I am not sure of, is the redirection to > the AbstractDefaultAjaxBehaviour in the onClick method of the > IndicatingAjaxLink. > > 2) The problem with this code is that, when I click the download link the > second time the indicator is not revolving. It is being displayed correctly, > and hidden on time, and the CSV data is exported correctly. The problem is > that the indicator is not moving. > > Thank you for you assitance in advance, > Robert Szmurlo > > Java: > > public class HomePage extends WebPage { > > private AbstractDefaultAjaxBehavior b; > private String data = null; > > public HomePage(final PageParameters parameters) { > > final ByteArrayResource bar = new ByteArrayResource("text/csv") { > @Override > public byte[] getData(Attributes attributes) { > byte[] bytes = null; > try { > bytes = data.getBytes(); > } catch (Exception e) { > e.printStackTrace(); > } > return bytes; > } > > @Override > protected void configureResponse(ResourceResponse > response,Attributes attributes) { > super.configureResponse(response, attributes); > response.setFileName("report.csv"); > } > > }; > > add( b = new AbstractDefaultAjaxBehavior() { > @Override > protected void respond(AjaxRequestTarget target) { > getRequestCycle().scheduleRequestHandlerAfterCurrent(new > ResourceRequestHandler(bar, getPageParameters())); > } > }); > > add( new IndicatingAjaxLink<Void>("link") { > @Override > public void onClick(AjaxRequestTarget target) { > > prepareData(); // takes some time > > if (target != null) { > *target.appendJavaScript("window.location='" + b.getCallbackUrl() + "'");* > } > } > }); > } > > protected void prepareData() { > ////////// JUST FOR TEST > try { > Thread.sleep(2000); > } catch (InterruptedException e) { > e.printStackTrace(); > } > ///////////////////////// > > // atach data? > data = "No.;Name\n" + > "1.;John\n" + > "2.;Mary"; > } > } > > > HTML: > <html> > <body> > <a wicket:id="link">Export CSV</a> > </body> > </html> > -- Martin Grigorov jWeekend Training, Consulting, Development http://jWeekend.com --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@wicket.apache.org For additional commands, e-mail: users-h...@wicket.apache.org
