WidgetComponent.java

/*
 Copyright (c) 2014 Ahomé Innovation Technologies. All rights reserved.

 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.ait.toolkit.sencha.ext.client.core;

import java.util.Random;

import com.ait.toolkit.core.client.Function;
import com.ait.toolkit.core.client.JsoHelper;
import com.ait.toolkit.sencha.ext.client.ui.BoxComponent;
import com.ait.toolkit.sencha.shared.client.dom.DomConfig;
import com.ait.toolkit.sencha.shared.client.dom.DomHelper;
import com.ait.toolkit.sencha.shared.client.dom.DomUtil;
import com.ait.toolkit.sencha.shared.client.dom.ExtElement;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.ui.RootPanel;
import com.google.gwt.user.client.ui.Widget;

/**
 * Adapter between GWT {@link com.google.gwt.user.client.ui.Widget}'s and
 * {@link Component}'s.
 * 
 */
public class WidgetComponent extends BoxComponent {

	public static final String hiddenDivID = "_ext4j_hidden";
	private Widget w;
	private String componentId;

	private native void init()/*-{
		var widget = this.@com.ait.toolkit.sencha.ext.client.core.WidgetComponent::w;
		var divID = this.@com.ait.toolkit.sencha.ext.client.core.WidgetComponent::componentId;
		$wnd.Ext
				.define(
						'Ext.ux.WidgetComponent',
						{
							extend : 'Ext.Component',
							xtype : 'widgetComponent',
							widget : null,
							constructor : function(config) {
								var me = this;
								me.callParent(config);
							},
							listeners : {
								render : function(component) {

								},
								afterRender : function(component) {
									//var widget = @com.ait.toolkit.sencha.ext.client.core.WidgetComponent::get()();
									//alert(this.widget);
									//a GWT widget must be attached to a GWT NotificationContainer for its events to fire.
									var attached = widget.@com.google.gwt.user.client.ui.Widget::isAttached()();
									var rp;
									if (!attached) {
										rp = @com.google.gwt.user.client.ui.RootPanel::get(Ljava/lang/String;)(divID);
										if (rp) {
											rp.@com.google.gwt.user.client.ui.HasWidgets::add(Lcom/google/gwt/user/client/ui/Widget;)(widget);
										}

									}
									var widgetEl = widget.@com.google.gwt.user.client.ui.UIObject::getElement()();
									this.el = $wnd.Ext.get(widgetEl);
									this.el.setVisible(true);
									//this.ownerCt.getEl().insertBefore(widgetEl);

									//container.dom.insertBefore(widgetEl, position);
									//delete this.widget;
								}
							}
						});
	}-*/;

	public WidgetComponent(Widget widget) {
		this.componentId = hiddenDivID + "_" + generateId();
		this.w = widget;
		init();
		createHiddenDiv();
		setId(DomUtil.getID(widget));
		addListener("beforedestroy", new Function() {
			public void execute() {
				Widget widget = (Widget) JsoHelper.getAttributeAsObject(config,
						"widget");
				if (DOM.getParent(widget.getElement()) != null) {
					widget.removeFromParent();
				}
			}
		});

	}

	private void createHiddenDiv() {
		ExtElement hiddenDiv = Ext.get(this.componentId);
		if (hiddenDiv == null) {
			DomConfig domConfig = new DomConfig("div", this.componentId, null);
			domConfig.setStyle("display:none;");
			DomHelper.append(RootPanel.getBodyElement(), domConfig);
		}
	}

	public WidgetComponent(JavaScriptObject jsObj) {
		super(jsObj);
	}

	public void setWidget(Widget widget) {
		// Window.alert("????");
		// JsoHelper.setAttribute(config, "widget", widget);
		// push(widget);
	}

	public native void _setWidget(Widget w)/*-{
		var jso = this.@com.ait.toolkit.sencha.ext.client.core.WidgetComponent::getOrCreateJsObj()();
		var id = jso.id;
	}-*/;

	public native JavaScriptObject create(JavaScriptObject config) /*-{
		return new $wnd.Ext.ux.WidgetComponent(config);
	}-*/;

	public String getXType() {
		return "widgetComponent";
	}

	/**
	 * Generate and randon id
	 * 
	 * @return the string
	 */
	private static String generateId() {
		Random random = new Random();
		return Long.toString(Math.abs(random.nextLong()), 10);
	}
}