com.google.gwt.maps.client.event.GroundOverlayVisibilityChangedHandler.java Source code

Introduction

Here is the source code for com.google.gwt.maps.client.event.GroundOverlayVisibilityChangedHandler.java

Source

/*
 * Copyright 2008 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.maps.client.event;

import com.google.gwt.maps.client.overlay.GroundOverlay;

import java.util.EventObject;

/**
 * Provides an interface to implement in order to receive
 * MapEvent.VISIBILITYCHANGED events from the {@link GroundOverlay}.
 */
public interface GroundOverlayVisibilityChangedHandler {

    /**
     * Encapsulates the arguments for the MapEvent.VISIBILITYCHANGED event on a
     * {@link GroundOverlay}.
     */
    @SuppressWarnings("serial")
    class GroundOverlayVisibilityChangedEvent extends EventObject {

        boolean visible;

        public GroundOverlayVisibilityChangedEvent(GroundOverlay source, boolean visible) {
            super(source);
            this.visible = visible;
        }

        /**
         * Returns the instance of the ground overlay that generated this event.
         * 
         * @return the instance of the ground overlay that generated this event.
         */
        public GroundOverlay getSender() {
            return (GroundOverlay) getSource();
        }

        /**
         * Returns the visible state of the GroundOverlay.
         * 
         * @return true if the GroundOverlay is visible.
         */
        public boolean isVisible() {
            return visible;
        }
    }

    /**
     * Method to be invoked when a MapEvent.VISIBILITYCHANGED event fires on a
     * {@link GroundOverlay}.
     * 
     * @param event contains the properties of the event.
     */
    void onVisibilityChanged(GroundOverlayVisibilityChangedEvent event);
}