thank Andreas and Aditya for your explanation. however the problem has nothing to do with RPC, the "search operation" i mentioned above is simply a local operation such as sort a large chunk of data which will take seconds to completed. meanwhile the client is unresponsive until the click OnClick() is completed, you can simply simulate this situation by doing a " while loop".
is there other way i can see the "beginning..." ? or GWT has the ability to make UI responsive when it doing a time-consuming operation in client? thanks. -Shelley On Jul 7, 8:44 pm, andreas <[email protected]> wrote: > HeyShelley, > > a bit of further information is missing but may it be that you issue > an RPC between infoLabel.setText("Beginning...."); and > infoLabel.setText("Completed....");? > > If so you simply forgot the async nature of GWT RPC. Your code in > onClick(...) will not sort of stop or wait until the RPC finishes and > continue afterwards. That's why infoLabel.setText("Completed...."); > will be immediately executed after infoLabel.setText("Beginning...."); > and you're simply "way to slow" to see it. > > What you could do instead is call infoLabel.setText("Completed...."); > in your onSuccess(...) in case I'm right with RPC or in the callback > of whatever request you do for your search operation. > > Andreas > > On 7 Jul., 10:22,Shelley<[email protected]> wrote: > > > > > hello all: > > i came across a strange problem which seems quite simple: > > > i have a button and a label on a panel, the button has been > > registered a listener: > > > Button searchButton = new Button( "Search" ); > > searchButton.addClickHandler( new ClickHandler() > > { > > @Override > > public void onClick( ClickEvent event ) > > { > > infoLabel.setText("Beginning...."); > > //do a search operation here which will take more than > > 5 seconds... > > infoLabel.setText("Completed..."); > > } > > } ); > > > that's all, but i never see the "Beginning....“ on the label, but only > > see the "completed...", seem the label will not refresh it's text > > until onClick is finished? how can i achieved the function that > > display "beginning..." first and "Completed..." when the operation > > completed? > > > thanks in advance. > > > -Shelley -- You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
