Correct handling of OnMouseWheel events in Ext-GWT
- by Kevin Loney
I'm trying to figure out which property of BoxComponentEvent will tell me if the generated OnMouseWheel event was a scroll-up or scroll-down event. I have output the values of all the properties BoxComponentEvent exposes; and all of them (with the exception of the coordinates at which the event took place) stay the same regardless. Google and the Ext-GWT docs have been pretty useless for providing a concrete example.
public class MyPanel extends ContentPanel {
// ...
public MyPanel() {
addListener(Events.OnMouseWheel, new Listener<BoxComponentEvent>() {
public void handleEvent(BoxComponentEvent be) {
// What happens here to distinguish scroll-up and scroll-down?
}
});
}
protected void afterRender() {
super.afterRender();
el().addEventsSunk(Events.OnMouseWheel.getEventCode());
}
// ...
}
