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

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

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/*
 * Copyright 2010 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.impl.MapEvent;
import com.google.gwt.maps.client.streetview.StreetviewPanoramaWidget;

import java.util.EventObject;

/**
 * Provides an interface to implement in order to receive
 * {@link MapEvent#ZOOMCHANGED} events from the {@link StreetviewPanoramaWidget}
 * .
 */
public interface StreetviewZoomChangedHandler {

    /**
     * Encapsulates the arguments for the {@link MapEvent#ZOOMCHANGED} event on a
     * {@link StreetviewPanoramaWidget}.
     */
    @SuppressWarnings("serial")
    class StreetviewZoomChangedEvent extends EventObject {
        private final double zoom;

        public StreetviewZoomChangedEvent(StreetviewPanoramaWidget source, double zoom) {
            super(source);
            this.zoom = zoom;
        }

        /**
         * Returns the new zoom of the Street View point of view.
         *
         * @return the new zoom of the Street View point of view.
         */
        public double getZoom() {
            return zoom;
        }

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

    /**
     * A method to implement in order to handle {@link StreetviewZoomChangedEvent}
     * .
     *
     * @param event event to handle.
     */
    void onZoomChanged(StreetviewZoomChangedEvent event);
}