Thanks very much Alyxandor
Regards
Daniele
On 13 Mag, 15:20, Alyxandor <a.revolution.ultra.b...@gmail.com> wrote:
> YourWidget.addDomHandler(new KeyUpHandler(){
> public void onKeyUp(KeyUpEvent event) {
> // TODO Auto-generated method stub
>
> }
>
> }, KeyUpEvent.getType());
>
> Just like real DOM, you've got to manually add KeyUp, KeyPress and
> KeyDown. This saves on memory leaks, and is more efficient than using
> onBrowserEvent()... Which you can also use.
>
> YourWidget = new FlowPanel(){
> @Override
> public void onBrowserEvent(Event event) {
> switch(event.getTypeInt()){
> case Event.ONKEYUP:
>
> }
> }
> };
>
> Also, you can manually add an old event listener, but you've got to
> set and clear events yourself {that's what HandlerRegistration is
> for}:
>
> DOM.setEventListener(YourWidget.getElement(), new EventListener(){
> public void onBrowserEvent(Event event) {
> // TODO Auto-generated method stub
>
> }
> });
> DOM.sinkEvents(YourWidget.getElement(), Event.ONKEYUP);
>
> ...If you want to grab key events, only certain DOM elements are
> normally capable of receiving key events, so you might want to do:
>
> Event.addNativePreviewHandler(new NativePreviewHandler(){
> public void onPreviewNativeEvent(NativePreviewEvent
> event) {
> if (event.getTypeInt()==Event.ONKEYPRESS){
>
> }
> }
> });
>
> JUST MAKE SURE YOU CLEAR THE NATIVE EVENT PREVIEW WHEN YOUR WIDGETS
> DETACH, OR STUFF LIKE POPUP PANEL MIGHT DIE ON YOU!
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