Here is a solution without having to change the codebase:
private static class ScrollableDefaultSuggestionDisplay extends SuggestBox.
DefaultSuggestionDisplay {
private Widget suggestionMenu;
@Override
protected Widget decorateSuggestionList(Widget suggestionList) {
suggestionMenu = suggestionList;
return suggestionList;
}
@Override
protected void moveSelectionDown() {
super.moveSelectionDown();
scrollSelectedItemIntoView();
}
@Override
protected void moveSelectionUp() {
super.moveSelectionUp();
scrollSelectedItemIntoView();
}
private void scrollSelectedItemIntoView() {
Element divElement = suggestionMenu.getElement();
Node tableNode = (Element)divElement.getChild(divElement.
getChildCount() - 1); // Firefox, Chrome have 2, IE has 1
// TABLE TBODY TR's
NodeList<Node> trList = tableNode.getChild(0).getChildNodes();
for (int trIndex = 0; trIndex < trList.getLength(); ++trIndex) {
Element trElement = (Element)trList.getItem(trIndex);
if (((Element)trElement.getChild(0)).getClassName().contains(
"selected")) {
trElement.scrollIntoView();
break;
}
}
}
}
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