com.googlecode.gwtphonegap.client.plugins.childbrowser.ChildBrowserBrowserImpl.java Source code

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Here is the source code for com.googlecode.gwtphonegap.client.plugins.childbrowser.ChildBrowserBrowserImpl.java

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/*
 * Copyright 2010 Daniel Kurka
 * 
 * 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.googlecode.gwtphonegap.client.plugins.childbrowser;

import com.google.gwt.dom.client.Style.Overflow;
import com.google.gwt.dom.client.Style.Position;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.dom.client.LoadEvent;
import com.google.gwt.event.dom.client.LoadHandler;
import com.google.web.bindery.event.shared.EventBus;
import com.google.web.bindery.event.shared.HandlerRegistration;
import com.google.web.bindery.event.shared.SimpleEventBus;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.Frame;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.RootPanel;

/**
 * 
 * 
 */
public class ChildBrowserBrowserImpl implements ChildBrowser {

    private Browser browser;

    private EventBus handlerManager = new SimpleEventBus();

    /* (non-Javadoc)
     * @see com.googlecode.gwtphonegap.client.plugins.PhoneGapPlugin#initialize()
     */
    @Override
    public void initialize() {
        // nothin to do here

    }

    /* (non-Javadoc)
     * @see com.googlecode.gwtphonegap.client.plugins.childbrowser.ChildBrowser#showWebPage(java.lang.String)
     */
    @Override
    public void showWebPage(String url) {
        removePanel();

        if (browser == null) {
            browser = new Browser();

        }

        if (!browser.isAttached()) {
            RootPanel.get().add(browser);
        }

        browser.navigate(url);

    }

    @Override
    public void showWebPage(String url, boolean showLocationBar) {
        showWebPage(url);
    }

    private class Browser extends Composite {
        private Frame frame;

        private Button button;
        private Panel container;

        /**
         * 
         */
        public Browser() {
            container = new FlowPanel();
            container.setSize("100%", "100%");
            container.getElement().getStyle().setPosition(Position.ABSOLUTE);
            container.getElement().getStyle().setZIndex(1000);

            FlowPanel frameStupidPanel = new FlowPanel();
            frameStupidPanel.getElement().getStyle().setPosition(Position.ABSOLUTE);
            frameStupidPanel.getElement().getStyle().setTop(0, Unit.PX);
            frameStupidPanel.getElement().getStyle().setLeft(0, Unit.PX);
            frameStupidPanel.getElement().getStyle().setRight(0, Unit.PX);
            frameStupidPanel.getElement().getStyle().setBottom(32, Unit.PX);

            frame = new Frame();

            frame.setSize("100%", "100%");

            frame.addDomHandler(new LoadHandler() {

                @Override
                public void onLoad(LoadEvent event) {
                    onLocationChange(getUrlFromFrame(frame.getElement()));

                }
            }, LoadEvent.getType());

            frame.getElement().getStyle().setBackgroundColor("white");
            frame.getElement().getStyle().setOverflow(Overflow.AUTO);

            container.add(frame);

            FlowPanel flowPanel = new FlowPanel();
            flowPanel.getElement().getStyle().setPosition(Position.ABSOLUTE);

            flowPanel.getElement().getStyle().setLeft(0, Unit.PX);
            flowPanel.getElement().getStyle().setRight(0, Unit.PX);
            flowPanel.getElement().getStyle().setBottom(0, Unit.PX);
            flowPanel.getElement().getStyle().setHeight(32, Unit.PX);
            button = new Button("close");
            button.addClickHandler(new ClickHandler() {

                @Override
                public void onClick(ClickEvent event) {
                    close();
                    onClose();

                }
            });
            flowPanel.add(button);

            container.add(flowPanel);

            initWidget(container);
        }

        private void navigate(String url) {
            frame.setUrl(url);
        }

        /* (non-Javadoc)
         * @see com.google.gwt.user.client.ui.Composite#onAttach()
         */
        @Override
        protected void onAttach() {
            super.onAttach();
            container.getElement().getStyle().setPosition(Position.ABSOLUTE);
        }
    }

    /* (non-Javadoc)
     * @see com.googlecode.gwtphonegap.client.plugins.childbrowser.ChildBrowser#close()
     */
    @Override
    public void close() {
        removePanel();

    }

    private native String getUrlFromFrame(Element element)/*-{
                                                          return element.contentWindow.location.href;
                                                          }-*/;

    private void removePanel() {
        if (browser != null) {
            if (browser.isAttached()) {
                RootPanel.get().remove(browser);
            }

        }
    }

    @Override
    public HandlerRegistration addLocationChangeHandler(ChildBrowserLocationChangedHandler handler) {
        return handlerManager.addHandler(ChildBrowserLocationChangedEvent.getType(), handler);
    }

    @Override
    public HandlerRegistration addCloseHandler(ChildBrowserCloseHandler handler) {
        return handlerManager.addHandler(ChildBrowserCloseEvent.getType(), handler);
    }

    @Override
    public HandlerRegistration addOpenExternalHandler(ChildBrowserOpenExternalHandler handler) {
        return handlerManager.addHandler(ChildBrowserOpenExternalEvent.getType(), handler);
    }

    private void onClose() {
        handlerManager.fireEvent(new ChildBrowserCloseEvent());
    }

    private void onLocationChange(String url) {
        handlerManager.fireEvent(new ChildBrowserLocationChangedEvent(url));
    }

    @Override
    public void openExternal(String url, boolean usecordova) {
        Window.open(url, "_blank", "");
    }

}