com.smartgwt.client.widgets.tree.events

## Interface HasFolderOpenedHandlers

- All Superinterfaces:
    com.google.gwt.event.shared.HasHandlers
  All Known Implementing Classes:
    EditTree, TreeGrid, TreePalette

      public interface HasFolderOpenedHandlers
      extends com.google.gwt.event.shared.HasHandlers

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `com.google.gwt.event.shared.HandlerRegistration` | `addFolderOpenedHandler(FolderOpenedHandler handler)` This method is called when a folder is opened either via the user manipulating the expand/collapse control in the UI or via `TreeGrid.openFolder()`.

    - ### Methods inherited from interface com.google.gwt.event.shared.HasHandlers

      `fireEvent`

- - ### Method Detail

    - #### addFolderOpenedHandler

          com.google.gwt.event.shared.HandlerRegistration addFolderOpenedHandler(FolderOpenedHandler handler)

      This method is called when a folder is opened either via the user manipulating the expand/collapse control in the UI or via `TreeGrid.openFolder()`. You can return `false` to cancel the open.
      Parameters:
        `handler` - the folderOpened handler
      Returns:
        `HandlerRegistration` used to remove this handler