public interface VisibilityChangedHandler extends EventHandler
| Modifier and Type | Method and Description |
|---|---|
void |
onVisibilityChanged(VisibilityChangedEvent event)
Notification fired when this canvas becomes visible or hidden to the user.
|
void onVisibilityChanged(VisibilityChangedEvent event)
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.
event - the event