Builder3.java

div(
            id(widget.getRenderId()),
            classNames(getWidgetTypeCssClass(widget), getModeClass()),
            div(
                    title(widget.getTooltip()),
                    className("gw-header--icon"),
                    event(getMode() == Mode.ACTION, Tag.Event.CLICK, "id:" + widget.getRenderId()),
                    !Strings.isNullOrEmpty(icon.getSource()) ?
                            img().src(icon.getSource()) :
                            text(widget.getLabel())),
            div(!grouping().orElse(true), //Ability to ungroup means this is the grouped cell
                    title("Grouped column.  Click to ungroup"),
                    classNames("gw-header--grouping-icon", "gw-column--grouped-icon"),
                    event(Tag.Event.CLICK,
                            "ListView.group", "groupAction:ungroup",
                            "renderId:" + widget.getRenderId(),
                            "actionEventType:" + ActionWidgetUpdateHandler.ACTION_EVENT_TYPE)
            ),
            div(getMode() == Mode.ACTION && sortDirection != null,
                    title("Sort direction.  Click to reverse sort"),
                    classNames("gw-header--sorting-icon", sortingIcons.get(sortDirection)),
                    event(Tag.Event.CLICK, "fireEvent", "id:" + widget.getRenderId())),
            div(getMode() == Mode.ACTION, //TODO: Localization for labels,
                    id(widget.getRenderId() + "-menu"),
                    classNames("gw-header--menu-container", "gw-putSubMenusBelow"),
                    data("gw-hover-submenu"),
                    div(
                            id(widget.getRenderId() + "-dropDownButton"),
                            className("gw-header--menu-icon"))
                    div(
                            id(widget.getRenderId() + "-subMenu"),
                            className("gw-subMenu"),
                            div(
                                    className("gw-menuItem"),
                                    event(Tag.Event.CLICK, "fireEvent", "id:" + widget.getRenderId())
                                    div(
                                            classNames("gw-header--sorting-icon", sortingIcons.get(WidgetSortDirection.ASCENDING)),
                                            className(sortDirection == WidgetSortDirection.ASCENDING, "gw-disabled")),
                                    div(
                                            className("gw-menuItem--label"),
                                            text("Sort Ascending"))),
                            div(
                                    className("gw-menuItem"),
                                    event(Tag.Event.CLICK, "fireEvent", "id:" + widget.getRenderId()),
                                    div(
                                            classNames("gw-header--sorting-icon", sortingIcons.get(WidgetSortDirection.DESCENDING)),
                                            className(sortDirection == WidgetSortDirection.DESCENDING, "gw-disabled")),
                                    div(
                                            className("gw-menuItem--label"),
                                            text("Sort Descending"))),
                            div(grouping().isPresent(), () ->
                                    Lists.newArrayList(
                                            className("gw-menuItem"),
                                            event(Tag.Event.CLICK,
                                                    "ListView.group",
                                                    grouping().get() ? "groupAction:group" : "groupAction:ungroup",
                                                    "renderId:" + widget.getRenderId(),
                                                    "actionEventType:" + ActionWidgetUpdateHandler.ACTION_EVENT_TYPE),
                                            div(
                                                    classNames("gw-header--grouping-icon", grouping().get() ? "gw-column--groupable-icon" : "gw-column--grouped-icon")),
                                            div(
                                                    className("gw-menuItem--label"),
                                                    text(grouping().get() ? "Group" : "Ungroup")))))));