com.goodow.wave.client.shell.WidgetContainer.java Source code

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Here is the source code for com.goodow.wave.client.shell.WidgetContainer.java

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/*
 * Copyright 2012 Goodow.com
 * 
 * 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.goodow.wave.client.shell;

import com.goodow.web.feature.client.FeatureDetection;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.dom.client.Style;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.EventListener;
import com.google.gwt.user.client.ui.AcceptsOneWidget;
import com.google.gwt.user.client.ui.FlowPanel;
import com.google.gwt.user.client.ui.IsWidget;
import com.google.gwt.user.client.ui.Widget;
import com.google.inject.Inject;

public class WidgetContainer extends FlowPanel implements AcceptsOneWidget {
    private Widget previousWidget;
    private Widget currentWidget;
    private long toRotateY = 0;
    private boolean toContainerFront = true;
    private static final com.goodow.wave.client.shell.WaveShellResources.Style CSS = WaveShellResources.css();;
    private static final String[] STYLE_NAMES = new String[] { CSS.widgetPreviousBegin(), CSS.widgetPreviousEnd(),
            CSS.widgetCurrentBegin(), CSS.widgetCurrentEnd() };

    private static native void setTransitionEndListener(Element elem, EventListener listener)/*-{
                                                                                             var callBack = function(e){
                                                                                             listener.@com.google.gwt.user.client.EventListener::onBrowserEvent(Lcom/google/gwt/user/client/Event;)(e);
                                                                                             };
                                                                                             elem.addEventListener('webkitTransitionEnd', callBack, false);
                                                                                             }-*/;

    @Inject
    WidgetContainer() {
        addStyleName(WaveShellResources.css().widgetContainer());
    }

    @Override
    public void setWidget(final IsWidget w) {
        Widget newWidget = asWidgetOrNull(w);
        if (newWidget == null) {
            return;
        }
        // Remove old child.
        if (previousWidget != null) {
            remove(previousWidget);
        }
        if (currentWidget != null) {
            toRotateY += 180;
            toContainerFront = !toContainerFront;
        }
        previousWidget = currentWidget;
        currentWidget = newWidget;

        // if (previousWidget != null) {
        // previousWidget.removeStyleName(css.widgetCurrent());
        // previousWidget.addStyleName(css.widgetPrevious());
        // }
        // currentWidget.removeStyleName(css.widgetPrevious());
        // currentWidget.addStyleName(css.widgetCurrent());
        Style curStyle = currentWidget.getElement().getStyle();
        // curStyle.setProperty("webkitTransform", !toContainerFront ? "rotateY(180deg)" : "initial");
        curStyle.setTop(0, Unit.PX);
        setStyle(currentWidget, CSS.widgetCurrentBegin());
        setStyle(previousWidget, CSS.widgetPreviousBegin());
        insert(currentWidget, 0);
        FeatureDetection.hideAddressBar();
        if (previousWidget != null) {
            setTransitionEndListener(previousWidget.getElement(), new EventListener() {

                @Override
                public void onBrowserEvent(final Event event) {
                    previousWidget.removeFromParent();
                }
            });
        }
        Scheduler.get().scheduleDeferred(new ScheduledCommand() {

            @Override
            public void execute() {
                setStyle(currentWidget, CSS.widgetCurrentEnd());
                setStyle(previousWidget, CSS.widgetPreviousEnd());
                if (previousWidget != null) {
                    previousWidget.getElement().getStyle().setTop(-1 * currentWidget.getOffsetHeight() - 7,
                            Unit.PX);
                }
            }
        });
    }

    private void setStyle(final Widget widget, final String name) {
        if (widget == null) {
            return;
        }
        for (String n : STYLE_NAMES) {
            widget.removeStyleName(n);
        }
        widget.addStyleName(name);
    }
}