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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