org.cruxframework.crux.widgets.client.disposal.topmenudisposal.TopMenuDisposalSmallController.java Source code

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Here is the source code for org.cruxframework.crux.widgets.client.disposal.topmenudisposal.TopMenuDisposalSmallController.java

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/*
 * Copyright 2011 cruxframework.org.
 * 
 * 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 org.cruxframework.crux.widgets.client.disposal.topmenudisposal;

import org.cruxframework.crux.core.client.controller.Controller;
import org.cruxframework.crux.core.client.controller.Expose;
import org.cruxframework.crux.core.client.controller.crossdevice.DeviceAdaptiveController;
import org.cruxframework.crux.core.client.screen.Screen;
import org.cruxframework.crux.widgets.client.button.Button;
import org.cruxframework.crux.widgets.client.event.SelectEvent;
import org.cruxframework.crux.widgets.client.event.SelectHandler;
import org.cruxframework.crux.widgets.client.simplecontainer.SimpleViewContainer;
import org.cruxframework.crux.widgets.client.swappanel.HorizontalSwapPanel;
import org.cruxframework.crux.widgets.client.swappanel.HorizontalSwapPanel.Direction;

import com.google.gwt.core.client.Scheduler;
import com.google.gwt.core.client.Scheduler.ScheduledCommand;
import com.google.gwt.event.dom.client.TouchStartEvent;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.FlowPanel;

/**
 * @author Gesse Dafe
 */
@Controller("topMenuDisposalSmallController")
public class TopMenuDisposalSmallController extends DeviceAdaptiveController implements TopMenuDisposal {
    private static final String HISTORY_PREFIX = "topMenuDisposal:";

    private HorizontalSwapPanel swapPanel;
    private FlowPanel menuPanel;
    private SimpleViewContainer viewContainer;
    private String lastVisitedView = null;

    private String viewName;

    @Override
    public void addMenuEntry(String label, final String targetView) {
        Button menuItem = new Button();
        menuItem.addStyleName("menuEntry");
        menuItem.setText(label);
        menuItem.addSelectHandler(new SelectHandler() {
            @Override
            public void onSelect(SelectEvent event) {
                showView(targetView, true);
            }
        });

        menuPanel.add(menuItem);
    }

    @Override
    protected void init() {
        viewContainer = getChildWidget("viewContainer");
        swapPanel = getChildWidget("swapPanel");
        menuPanel = getChildWidget("menuPanel");
        menuPanel.removeFromParent();
        setStyleName("crux-TopMenuDisposal");

        Screen.addHistoryChangedHandler(new ValueChangeHandler<String>() {
            @Override
            public void onValueChange(ValueChangeEvent<String> event) {
                String token = event.getValue();
                if (token != null && token.startsWith(HISTORY_PREFIX)) {
                    showView(token.replace(HISTORY_PREFIX, ""), false);
                }
            }
        });

        Scheduler.get().scheduleDeferred(new ScheduledCommand() {
            @Override
            public void execute() {
                //Favorites
                String hash = com.google.gwt.user.client.Window.Location.getHash();
                if (hash != null && hash.startsWith(HASH + HISTORY_PREFIX)) {
                    String currentViewName = hash.replace(HASH + HISTORY_PREFIX, "");
                    showView(currentViewName, false);
                    History.newItem(HISTORY_PREFIX + currentViewName);
                    return;
                }

                //DefaultView
                if (lastVisitedView == null) {
                    viewContainer.showView(viewName);
                    lastVisitedView = viewName;
                    Window.scrollTo(0, 0);
                    History.newItem(HISTORY_PREFIX + viewName);
                    return;
                }
            }
        });
    }

    @Expose
    public void onShowMenu(TouchStartEvent evt) {
        evt.preventDefault();
        evt.stopPropagation();
        showMenu();
    }

    @Override
    public void showMenu() {
        if (swapPanel.getCurrentWidget().equals(menuPanel) && lastVisitedView != null) {
            showView(lastVisitedView, false);
        } else {
            swapPanel.transitTo(menuPanel, Direction.BACKWARDS);
        }
    }

    @Override
    public void showView(String viewName, boolean saveHistory) {
        if (saveHistory) {
            History.newItem(HISTORY_PREFIX + viewName);
        } else {
            viewContainer.showView(viewName);
            swapPanel.transitTo(viewContainer, Direction.FORWARD);
            lastVisitedView = viewName;
            Window.scrollTo(0, 0);
        }
    }

    @Override
    public void setDefaultView(String viewName) {
        this.viewName = viewName;
    }
}