com.smartgwt.client.widgets.events

## Interface VisibilityChangedHandler

- All Superinterfaces:
    EventHandler

      public interface VisibilityChangedHandler
      extends EventHandler

- - ### Method Summary

    Methods
    Modifier and Type | Method and Description
    --- | ---
    `void` | `onVisibilityChanged(VisibilityChangedEvent event)` Notification fired when this canvas becomes visible or hidden to the user.

- - ### Method Detail

    - #### onVisibilityChanged

          void onVisibilityChanged(VisibilityChangedEvent event)

      Notification fired when this canvas becomes visible or hidden to the user. Note - this method is fired when the `Canvas.isVisible()` state of this component changes. It may be fired in response an explicit call to `Canvas.show()` or `Canvas.hide()` or `Canvas.setVisibility()`, or in response to a parent component being shown or hidden when this widgets `visibility` is set to "inherit".

      Note that a call to `Canvas.show()` or `Canvas.hide()` will not always fire this notification. If this widget has a hidden parent, show or hide would change this components `visibility` property, and may update the CSS visibility attribute of the drawn handle in the DOM, but would not actually hide or reveal the component to the user and as such the notification would not fire.

      Note also that this notification will only be fired for components which have been `drawn`.

      Parameters:
        `event` - the event