ac.uk.icl.dell.vaadin.menu.DynamicMenuImpl.java Source code

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Here is the source code for ac.uk.icl.dell.vaadin.menu.DynamicMenuImpl.java

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/*
 * Copyright (c) 2014. Matthew Campbell <matthew.campbell@mq.edu.au>, David R. Damerell <david@nixbioinf.org>.
 *
 * This file is part of GlycanBuilder Vaadin Release and its affliated projects EUROCarbDB, UniCarb-DB and UniCarbKB.
 *
 * This program is free software 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.
 *
 * GlycanBuilder Vaadin Release 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 (LICENSE.txt) for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GlycanBuilder Vaadin Release.  If not, see <http ://www.gnu.org/licenses/>.
 */
package ac.uk.icl.dell.vaadin.menu;

import java.util.HashMap;
import java.util.HashSet;
import java.util.List;

import com.vaadin.ui.MenuBar;

public abstract class DynamicMenuImpl extends MenuBar implements DynamicMenu {
    private static final long serialVersionUID = -1297565156689183635L;
    protected boolean modified = false;

    HashMap<Object, HashSet<MenuItem>> stateMap = new HashMap<Object, HashSet<MenuItem>>();

    @Override
    public void setModified() {
        modified = true;
    }

    @Override
    public boolean isModified() {
        return modified;
    }

    @Override
    public void refresh() {
        if (modified) {
            removeItems();

            setup();
            appendFinalItems();

            modified = false;
        }
    }

    @Override
    public synchronized void saveState(MenuItem item, Object obj) {
        HashSet<MenuItem> items = new HashSet<MenuItem>();
        List<MenuItem> children = item.getChildren();
        if (children != null && children.size() > 0) {
            items.addAll(item.getChildren());
        }

        stateMap.put(obj, items);
    }

    @Override
    public synchronized void restoreState(MenuItem item, Object obj) {
        for (MenuItem childItem : item.getChildren().toArray(new MenuItem[1])) {
            if (stateMap.get(obj).contains(childItem) == false) {
                item.removeChild(childItem);
            }
        }
    }

    @Override
    public synchronized void removeMenuItem(MenuItem item) {
        MenuItem parent = item.getParent();
        if (parent == null) {
            removeItem(item);
        } else {
            parent.removeChild(item);
        }
    }
}