You can use the below code

RootPanel.get().add(new Button("TEST", new ClickHandler() {

                        @Override
                      public void onClick(ClickEvent event) {
                        scrollPanel.scrollToTop();
                             scrollPanel.setVisible(false);
                         *Scheduler.get().scheduleDeferred(*
*                                               new 
Scheduler.ScheduledCommand() {*
*                                                      @Override*
*                                                       public void 
execute() {*
*                                                         
scrollPanel.scrollToBottom();*
*                                                   }*
*                                               });*
                            scrollPanel.setVisible(true);
                  }
              }));



On Tuesday, March 11, 2014 4:37:50 PM UTC+5:30, Federico De Faveri wrote:
>
> I have a ScrollPanel and I want to reset his scrolling position when it is 
> hidden.
> To do so I call the scrollTop method. As I can see it is not working only 
> when the ScrollPanel is hidden.
>
> Here a sample code:
>
>   
> public void onModuleLoad() {
>    StringBuilder html = new StringBuilder();
>    for (int i = 0; i<1000; i++) html.append("row "+i+"<br>");
>
>    HTMLPanel content = new HTMLPanel(html.toString());
>
>    final ScrollPanel scrollPanel = new ScrollPanel(content);
>    scrollPanel.setHeight("200px");
>    RootPanel.get().add(scrollPanel);
>
>    RootPanel.get().add(new Button("TEST", new ClickHandler() {
>
>     @Override
>     public void onClick(ClickEvent event) {
>       scrollPanel.scrollToTop();
>       scrollPanel.setVisible(false);
>       scrollPanel.scrollToBottom();
>       scrollPanel.setVisible(true);
>     }
>   }));
> }
>
>
>
> After clicking the TEST button the ScrollPanel keep is top position.
> Any idea how to scroll it when hidden?
>

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