# Package org.zkoss.zul.event

- Interface Summary
  Interface | Description
  --- | ---
  ChartAreaListener | Identifies area inside a chart that can be customized.
  ChartDataListener | Defines the methods used in listener when the content of `ChartModel` is changed.
  GroupsDataListener | Defines the methods used to listener when the content of `GroupsModel` is changed.
  ListDataListener | Defines the methods used to listener when the content of `ListModel` is changed.
  PagingListener | Provide a shortcut for PagingEventListener
  TreeDataListener | Defines the methods used to listener when the content of `TreeModel` is changed.

- Class Summary
  Class | Description
  --- | ---
  ChartDataEvent | Defines an event that encapsulates changes to a chart's data model.
  ColSizeEvent | Used to notify that the width of a column is changed.
  DataLoadingEvent | Represent onDataLoading event.
  DialChartDataEvent | A dial chart data event to handle the property changed.
  GroupsDataEvent | Defines an event that encapsulates changes to a list of groups.
  ListDataEvent | Defines an event that encapsulates changes to a list.
  PageSizeEvent | Used to notify the paging size has been changed when the autopaging (`MeshElement.setAutopaging(boolean)`) is enabled and user changed the size of the content.
  PagingEvent | Used to notify that a new page is selected by the user, or by `Paginal` (such as `Paging`).
  RenderEvent<T extends Component> | Represents the onRender event.
  TreeDataEvent | Defines an event that encapsulates changes to a tree.
  ZulEvents | Utilities to access events for ZK and ZUL.