And...
since my onBrowserEvent(Event event) is within the ListBox, I added
the following check within onBrowserEvent(...) to only act on option
elements and not selects:
if (optionElement.getTagName().equalsIgnoreCase("option")) {
switch (event.getTypeInt()) {
case Event.ONMOUSEOVER:
showTooltip(optionElement);
break;
case Event.ONMOUSEOUT:
cancelTooltip(optionElement);
break;
case Event.ONMOUSEDOWN:
cancelTooltip(optionElement);
break;
}
}
My Tooltip class extends PopupPanel and here's the showTip() method
that shows the popup relative to the option being hovered over:
public void showTip() {
setPopupPositionAndShow(new PopupPanel.PositionCallback() {
public void setPosition(int offsetWidth, int offsetHeight) {
int left = referenceElement.getAbsoluteLeft();
int top = referenceElement.getAbsoluteTop() +
referenceElement.getOffsetHeight();
setPopupPosition(left, top);
}
});
}
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