MenuBarImpl.java example

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/*
 * Copyright (c) 2010, grossmann
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
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 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * * Neither the name of the jo-widgets.org nor the
 *   names of its contributors may be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL jo-widgets.org BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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package org.jowidgets.impl.widgets.basic;

import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

import org.jowidgets.api.controller.IDisposeListener;
import org.jowidgets.api.model.IListModelListener;
import org.jowidgets.api.model.item.IMenuBarModel;
import org.jowidgets.api.model.item.IMenuModel;
import org.jowidgets.api.toolkit.Toolkit;
import org.jowidgets.api.widgets.IMainMenu;
import org.jowidgets.api.widgets.IMenu;
import org.jowidgets.api.widgets.IMenuBar;
import org.jowidgets.api.widgets.IWidget;
import org.jowidgets.api.widgets.blueprint.factory.IBluePrintFactory;
import org.jowidgets.api.widgets.descriptor.IMainMenuDescriptor;
import org.jowidgets.impl.base.delegate.DisposableDelegate;
import org.jowidgets.impl.widgets.common.wrapper.WidgetSpiWrapper;
import org.jowidgets.spi.widgets.IMenuBarSpi;
import org.jowidgets.tools.controller.ListModelAdapter;
import org.jowidgets.util.Assert;

public class MenuBarImpl extends WidgetSpiWrapper implements IMenuBar {

    private final List<IMenu> menus;
    private final IWidget parent;
    private final IListModelListener listModelListener;
    private final DisposableDelegate disposableDelegate;

    private IMenuBarModel model;

    public MenuBarImpl(final IMenuBarSpi widget, final IWidget parent) {
        super(widget);
        this.parent = parent;
        this.menus = new LinkedList<IMenu>();
        this.disposableDelegate = new DisposableDelegate();
        this.listModelListener = new ListModelAdapter() {

            @Override
            public void afterChildRemoved(final int index) {
                remove(index);
            }

            @Override
            public void afterChildAdded(final int index) {
                final IMenuModel addedModel = getModel().getMenus().get(index);
                addMenuModel(index, addedModel);
            }
        };

        setModel(Toolkit.getModelFactoryProvider().getItemModelFactory().menuBar());
    }

    @Override
    public IMenuBarSpi getWidget() {
        return (IMenuBarSpi) super.getWidget();
    }

    @Override
    public IWidget getParent() {
        return parent;
    }

    @Override
    public void dispose() {
        if (!isDisposed()) {
            removeAll();
            disposableDelegate.dispose();
        }
    }

    @Override
    public boolean isDisposed() {
        return disposableDelegate.isDisposed();
    }

    @Override
    public void addDisposeListener(final IDisposeListener listener) {
        disposableDelegate.addDisposeListener(listener);
    }

    @Override
    public void removeDisposeListener(final IDisposeListener listener) {
        disposableDelegate.removeDisposeListener(listener);
    }

    @Override
    public void setModel(final IMenuBarModel model) {
        if (this.model != null) {
            this.model.removeListModelListener(listModelListener);
            removeAll();
        }
        this.model = model;
        for (final IMenuModel childModel : model.getMenus()) {
            addMenuModel(menus.size(), childModel);
        }
        model.addListModelListener(listModelListener);
    }

    @Override
    public IMenuBarModel getModel() {
        return model;
    }

    @Override
    public List<IMenu> getMenus() {
        return Collections.unmodifiableList(new LinkedList<IMenu>(menus));
    }

    @Override
    public void removeAll() {
        for (final IMenu menu : getMenus()) {
            remove(menu);
        }
    }

    @Override
    public boolean remove(final IMenu menu) {
        Assert.paramNotNull(menu, "menu");
        final int index = menus.indexOf(menu);
        if (index != -1) {
            remove(index);
            return true;
        }
        else {
            return false;
        }
    }

    @Override
    public void remove(final int index) {
        final IMenu menu = menus.get(index);
        menus.remove(index);
        menu.dispose();
        getWidget().remove(index);
    }

    @Override
    public IMainMenu addMenu(final String name) {
        return addMenu(Toolkit.getBluePrintFactory().mainMenu(name));
    }

    @Override
    public IMainMenu addMenu(final String name, final char mnemonic) {
        return addMenu(Toolkit.getBluePrintFactory().mainMenu(name).setMnemonic(Character.valueOf(mnemonic)));
    }

    @Override
    public IMainMenu addMenu(final int index, final String name) {
        return addMenu(index, Toolkit.getBluePrintFactory().mainMenu(name));
    }

    @Override
    public IMainMenu addMenu(final IMainMenuDescriptor descriptor) {
        final IMainMenu result = addMenuInternal(null, descriptor);
        addToModel(null, result);
        return result;
    }

    @Override
    public IMainMenu addMenu(final int index, final IMainMenuDescriptor descriptor) {
        final IMainMenu result = addMenuInternal(Integer.valueOf(index), descriptor);
        addToModel(null, result);
        return result;
    }

    private void addMenuModel(final int index, final IMenuModel model) {
        final IBluePrintFactory bpf = Toolkit.getBluePrintFactory();
        addMenuInternal(index, bpf.mainMenu()).setModel(model);
    }

    private IMainMenu addMenuInternal(final Integer index, final IMainMenuDescriptor descriptor) {
        final IMainMenu result;
        if (index != null) {
            result = new MainMenuImpl(getWidget().addMenu(Integer.valueOf(index)), this, descriptor);
        }
        else {
            result = new MainMenuImpl(getWidget().addMenu(null), this, descriptor);
        }
        addToMenus(index, result);
        return result;
    }

    private void addToMenus(final Integer index, final IMenu menu) {
        if (index != null) {
            menus.add(index.intValue(), menu);
        }
        else {
            menus.add(menu);
        }
    }

    private void addToModel(final Integer index, final IMenu menu) {
        model.removeListModelListener(listModelListener);
        if (index != null) {
            getModel().addMenu(index.intValue(), menu.getModel());
        }
        else {
            getModel().addMenu(menu.getModel());
        }
        model.addListModelListener(listModelListener);
    }

}