com.dgzt.html.ButtonFootballGameHtml.java Source code

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Here is the source code for com.dgzt.html.ButtonFootballGameHtml.java

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/*
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
package com.dgzt.html;

import com.badlogic.gdx.ApplicationListener;
import com.badlogic.gdx.backends.gwt.GwtApplication;
import com.badlogic.gdx.backends.gwt.GwtApplicationConfiguration;
import com.dgzt.core.ButtonFootballGame;
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NodeList;
import com.google.gwt.dom.client.Style;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * HTML interface for the game.
 * 
 * @author Dgzt
 */
public class ButtonFootballGameHtml extends GwtApplication {

    // --------------------------------------------------
    // ~ Static members
    // --------------------------------------------------

    /** The default width value. */
    private static final int WIDTH = 640;

    /** The default height value. */
    private static final int HEIGHT = 480;

    /** This object. */
    private static ButtonFootballGameHtml instance;

    // --------------------------------------------------
    // ~ Override methods
    // --------------------------------------------------

    /**
     * The html configuration.
     */
    @Override
    public GwtApplicationConfiguration getConfig() {
        GwtApplicationConfiguration conf = new GwtApplicationConfiguration(WIDTH, HEIGHT);

        Element element = Document.get().getElementById("embed-html");
        VerticalPanel panel = new VerticalPanel();
        panel.setWidth("100%");
        panel.setHeight("100%");
        panel.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_CENTER);
        panel.setVerticalAlignment(HasVerticalAlignment.ALIGN_MIDDLE);
        element.appendChild(panel.getElement());
        conf.rootPanel = panel;

        return conf;
    }

    /**
     * The application listener.
     */
    @Override
    public ApplicationListener getApplicationListener() {
        instance = this;
        setLogLevel(LOG_NONE);
        setLoadingListener(new LoadingListener() {
            @Override
            public void beforeSetup() {
            }

            @Override
            public void afterSetup() {
                scaleCanvas();
                setupResizeHook();
            }
        });

        return new ButtonFootballGame();
    }

    // --------------------------------------------------
    // ~ Private methods
    // --------------------------------------------------

    /**
     * Scale the canvas on the html page.
     */
    private void scaleCanvas() {
        Element element = Document.get().getElementById("embed-html");
        int width = getWindowInnerWidth();
        int height = getWindowInnerHeight();
        consoleLog(String.valueOf(width) + " x " + String.valueOf(height));
        NodeList<Element> nl = element.getElementsByTagName("canvas");
        if (nl != null && nl.getLength() > 0) {
            Element canvas = nl.getItem(0);
            canvas.setAttribute("width", "" + width + "px");
            canvas.setAttribute("height", "" + height + "px");
            canvas.getStyle().setWidth(width, Style.Unit.PX);
            canvas.getStyle().setHeight(height, Style.Unit.PX);
            canvas.getStyle().setTop(0, Style.Unit.PX);
            canvas.getStyle().setLeft(0, Style.Unit.PX);
            canvas.getStyle().setPosition(Style.Position.ABSOLUTE);
        }
    }

    // --------------------------------------------------
    // ~ Native methods
    // --------------------------------------------------

    /**
     * Get the inner width value.
     * 
     * @return
     */
    private native int getWindowInnerWidth() /*-{
                                             return $wnd.innerWidth;
                                             }-*/;

    /**
     * Get the inner height value.
     * 
     * @return
     */
    private native int getWindowInnerHeight() /*-{
                                              return $wnd.innerHeight;
                                              }-*/;

    /**
     * Setup the browser resize event.
     */
    private native void setupResizeHook() /*-{
                                          var htmlLauncher_onWindowResize = $entry(@com.dgzt.html.ButtonFootballGameHtml::handleResize());
                                          $wnd.addEventListener('resize', htmlLauncher_onWindowResize, false);
                                          }-*/;

    // --------------------------------------------------
    // ~ Static methods
    // --------------------------------------------------

    /**
     * The resize handle.
     */
    public static void handleResize() {
        instance.scaleCanvas();
    }
}