Giving the delete button a hover tooltip in gwt
问题 In this picture, as you can see there are the red deletion buttons, how do I create a hover tooltip for these buttons? Is it the same as setShowHover(true) ? Code: HoverCustomizer customGroupTooltips = new HoverCustomizer() { @Override public String hoverHTML(Object value, ListGridRecord record, int rowNum, int colNum) { if (colNum == 1) { return "tooltip message"; } else if (colNum == 2) { return "delete"; } return null; } }; ListGridField name = new ListGridField(FIELD_NAME); ListGridField