com.googlecode.mgwt.ui.client.util.impl.AddressBarUtilIphoneImpl.java Source code

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Here is the source code for com.googlecode.mgwt.ui.client.util.impl.AddressBarUtilIphoneImpl.java

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/*
 * Copyright 2012 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.mgwt.ui.client.util.impl;

import com.google.gwt.dom.client.Document;
import com.google.gwt.event.logical.shared.ResizeEvent;
import com.google.gwt.event.logical.shared.ResizeHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Timer;
import com.google.gwt.user.client.Window;
import com.googlecode.mgwt.dom.client.event.orientation.OrientationChangeEvent.ORIENTATION;
import com.googlecode.mgwt.ui.client.MGWT;
import com.googlecode.mgwt.ui.client.util.AddressBarUtil;

public class AddressBarUtilIphoneImpl implements AddressBarUtil {

    private static HandlerRegistration resizeHandler;

    public AddressBarUtilIphoneImpl() {

    }

    @Override
    public void showAddressBar() {
        Window.scrollTo(0, 0);

    }

    @Override
    public void hideAddressBar() {
        ensureResizeListener();

        updateSizeAndScrollBar();

    }

    protected void ensureResizeListener() {
        if (resizeHandler != null)
            return;

        resizeHandler = Window.addResizeHandler(new ResizeHandler() {

            @Override
            public void onResize(ResizeEvent event) {
                updateSizeAndScrollBar();
            }

        });

    }

    protected void updateSizeAndScrollBar() {
        int innerHeight = getInnerHeight();

        ORIENTATION orientation = MGWT.getOrientation();

        // ios
        switch (orientation) {
        case LANDSCAPE:
            if (innerHeight < 269) {
                updateSize(269); // 208 + 60 +1
            }

            break;

        case PORTRAIT:
            if (innerHeight < 417) {
                updateSize(417); // 356 + 60 +1
            }
        default:
            break;
        }

        doScroll();
    }

    private static void updateSize(int y) {
        Document.get().getBody().getStyle().setPropertyPx("minHeight", y);
    }

    private static void doScroll() {
        new Timer() {

            @Override
            public void run() {
                Window.scrollTo(0, 1);

            }
        }.schedule(1);
    }

    private native static int getInnerHeight()/*-{
                                              return $wnd.innerHeight;
                                              }-*/;

}