/*
* Smart GWT (GWT for SmartClient)
* Copyright 2008 and beyond, Isomorphic Software, Inc.
*
* Smart GWT is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3
* as published by the Free Software Foundation. Smart GWT is also
* available under typical commercial license terms - see
* http://smartclient.com/license
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package com.smartgwt.client.widgets.events;
import com.google.gwt.event.shared.EventHandler;
public interface VisibilityChangedHandler extends EventHandler {
/**
* Notification fired when this canvas becomes visible or hidden to the user. Note - this method is fired when the {@link
* com.smartgwt.client.widgets.Canvas#isVisible Canvas.isVisible} state of this component changes. It may be fired in
* response an explicit call to {@link com.smartgwt.client.widgets.Canvas#show Canvas.show} or {@link
* com.smartgwt.client.widgets.Canvas#hide Canvas.hide} or {@link com.smartgwt.client.widgets.Canvas#setVisibility
* Canvas.setVisibility}, or in response to a parent component being shown or hidden when this widgets {@link
* com.smartgwt.client.widgets.Canvas#getVisibility visibility} is set to "inherit". <P> Note that a call to {@link
* com.smartgwt.client.widgets.Canvas#show Canvas.show} or {@link com.smartgwt.client.widgets.Canvas#hide Canvas.hide} will
* not <b>always</b> fire this notification. If this widget has a hidden parent, show or hide would change this components
* {@link com.smartgwt.client.widgets.Canvas#getVisibility 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. <P> Note also that this notification will only be fired for components which have been
* {@link com.smartgwt.client.widgets.Canvas#draw drawn}.
*
* @param event the event
*/
void onVisibilityChanged(com.smartgwt.client.widgets.events.VisibilityChangedEvent event);
}