Hi, TL;DR: there are new tooltip classes. Please only use the new stuff going forward. ... A bunch of patches were merged this week that converted every tooltip in ovirt-engine to use PatternFly (Bootstrap3) tooltips. Examples: [1] Since we want to keep all of the tooltips looking the same, please don't use DecoratedPanels or title attributes for tooltips anymore. Going forward, you must use the WidgetTooltip class (if you're putting a tooltip on a Widget), or the built in getTooltip() template method if you're providing a tooltip in a grid. [2] As part of this effort, I did some cleanup / refactoring to the Cell and Column infrastructure. A few noteworthy things: * All custom Cells that simply provided some variation of tooltip behavior were removed. Tooltips are now provided for free by the root objects in the Cell and Column hierarchy. * Almost all Columns use the template-method pattern for rendering a tooltip. Simply override the getTooltip method with tooltip contents. 'null' is ok (means no tooltip). * Cells also use the same template-method pattern for supporting a tooltip render, but tooltips should render in Columns wherever possible. Only use direct Cell rendering if absolutely necessary -- for example, in CompositeCells. * Text truncation behavior now lives in TextCell. There are two truncation methods -- fixed length limit, or CSS overflow-based. Text that is truncated will show in a tooltip, unless a manual tooltip is provided on that Column. (In other words, if text is too long to fit in a column, '...' will appear and a tooltip will show the full contents. Unless you override that behavior by setting your own tooltip in getTooltip().) * The Element ID Framework is fully integrated now. All Cell render methods are passed a unique ID. Please use it in your render. This helps with automated tests. Some code examples: in UIBinder: <t:WidgetTooltip ui:field="tooltip"> <g:SomeWidget ...> </t:WidgetTooltip> ... @UiField WidgetTooltip tooltip; ... tooltip.setHtml(someToolipValue); tooltip.reconfigure(); in a Column: @Override public SafeHtml getTooltip(XXXX object) { String tooltipContent = object.someProperty(); return SafeHtmlUtils.fromString(tooltipContent); } or, if a constant tooltip: @Override public SafeHtml getTooltip(XXXX object) { return SafeHtmlUtils.fromTrustedConstant(constants.someConstant()); } Let me know if there are any questions, or if you see any bugs! Thanks, Greg [1] http://i.imgur.com/rZ5oIIb.png http://i.imgur.com/6lpKuSD.png http://i.imgur.com/hYcZSuT.png http://i.imgur.com/9oKZnK4.png [2] you can also put a tooltip on an Element, but try to use a Widget if you can. See TooltipMixin::addTooltipToElement() Greg Sheremeta Red Hat, Inc. Sr. Software Engineer, RHEV Cell: 919-807-1086 gshereme(a)redhat.com