Vaadin Framework 8.4.0.rc1

Vaadin Framework 8.4.0.rc1 is a release candidate version for evaluating the enhancements mentioned below.

Enhancements in Vaadin Framework 8.4

• ComboBox has a better handling of new items with NewItemProvider.
• Binding APIs have been improved to allow more advanced use.
• New ReadOnlyHasValue wrapper helps to bind any visible element to a data item via Binder.
• Built-in StringTo converters now have an option to use ErrorMessageProvider.
• Grid headers and footers now support tooltips.
• Added Tree and TreeGrid recursive expand and collapse methods.
• BrowserResizeListener is called lazily during the resize.
• ItemClickEvent for Grid now takes an additional row index parameter.
• Support starting downloads and opening URLs from a MenuItem.
• ComboBox supports ConnectorResource icons.

Incompatible or Behavior-altering Changes in 8.4

• BrowserWindowOpenerConnector and FileDownloaderConnector now are subclasses of AbstractEventTriggerExtensionConnector.
• Date range limits in AbstractDateFieldState are now Strings instead of Dates, some client-side method signatures were changed.
• BrowserResizeListener is only called once resizing ends.
• ItemClickEvent for Grid now takes an additional row index parameter.