com.github.gwtcannonjs.client.utils.EventTarget.java Source code

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Here is the source code for com.github.gwtcannonjs.client.utils.EventTarget.java

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// The MIT License (MIT)
// Copyright (c) 2015 Jrmie Gottero

package com.github.gwtcannonjs.client.utils;

import com.google.gwt.core.client.JavaScriptObject;

/**
 * Base class for objects that dispatches events.
 */
public class EventTarget extends JavaScriptObject {
    protected EventTarget() {
        // A JavaScriptObject cannot be created directly
    }

    /**
     * Add an event listener
     * @param type
     * @param listener
     * @return The self object, for chainability.
     */
    public final native EventTarget addEventListener(String type, EventListener listener) /*-{
                                                                                          var listener__callback = (listener ? function(event) { listener.@com.github.gwtcannonjs.client.utils.EventListener::onEvent(Lcom/github/gwtcannonjs/client/utils/Event;)(event); } : undefined);
                                                                                          if (this.listener__store === undefined) { this.listener__store = {}; } this.listener__store[listener] = listener__callback;
                                                                                          return this.addEventListener(type, listener__callback);
                                                                                          }-*/;

    /**
     * Check if an event listener is added
     * @param type
     * @param listener
     */
    public final native boolean hasEventListener(String type, EventListener listener) /*-{
                                                                                      var listener__callback = null; if (this.listener__store !== undefined) { listener__callback = this.listener__store[listener]; }
                                                                                      return this.hasEventListener(type, listener__callback);
                                                                                      }-*/;

    /**
     * Remove an event listener
     * @param type
     * @param listener
     * @return The self object, for chainability.
     */
    public final native EventTarget removeEventListener(String type, EventListener listener) /*-{
                                                                                             var listener__callback = null; if (this.listener__store !== undefined) { listener__callback = this.listener__store[listener]; delete this.listener__store[listener]; }
                                                                                             return this.removeEventListener(type, listener__callback);
                                                                                             }-*/;

    /**
     * Emit an event.
     * @param event
     * @return The self object, for chainability.
     */
    public final native EventTarget dispatchEvent(Event event) /*-{
                                                               return this.dispatchEvent(event);
                                                               }-*/;

}