uk.co.modularaudio.util.swing.mvc.combo.ComboViewModelAdaptor.java Source code

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Here is the source code for uk.co.modularaudio.util.swing.mvc.combo.ComboViewModelAdaptor.java

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/**
 *
 * Copyright (C) 2015 - Daniel Hams, Modular Audio Limited
 *                      daniel.hams@gmail.com
 *
 * Mad is 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.
 *
 * Mad 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Mad.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

package uk.co.modularaudio.util.swing.mvc.combo;

import java.util.HashMap;
import java.util.Map;

import javax.swing.ComboBoxModel;
import javax.swing.event.ListDataListener;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import uk.co.modularaudio.util.exception.RecordNotFoundException;
import uk.co.modularaudio.util.mvc.combo.ComboController;
import uk.co.modularaudio.util.mvc.combo.ComboItem;
import uk.co.modularaudio.util.mvc.combo.ComboModel;
import uk.co.modularaudio.util.mvc.combo.ComboModelListener;

final class ComboViewModelAdaptor<A extends ComboItem> implements ComboBoxModel<A> {
    protected static Log log = LogFactory.getLog(ComboViewModelAdaptor.class.getName());

    private final ComboModel<A> cm;
    private final ComboController<A> cc;

    private Map<ListDataListener, ComboModelListener<A>> ldlToCmlListenerMap = new HashMap<ListDataListener, ComboModelListener<A>>();

    ComboViewModelAdaptor(ComboModel<A> cm, ComboController<A> cc) {
        this.cm = cm;
        this.cc = cc;
    }

    @Override
    public int getSize() {
        return cm.getNumElements();
    }

    @Override
    public A getElementAt(int index) {
        return cm.getElementAt(index);
    }

    @Override
    public void addListDataListener(final ListDataListener l) {
        ComboModelListener<A> decoration = new ComboViewModelListenerAdaptor<A>(l);
        cm.addListener(decoration);
        ldlToCmlListenerMap.put(l, decoration);
    }

    @Override
    public void removeListDataListener(ListDataListener l) {
        ComboModelListener<A> decoration = ldlToCmlListenerMap.get(l);
        if (decoration != null) {
            cm.removeListener(decoration);
            ldlToCmlListenerMap.remove(l);
        }
    }

    @Override
    public void setSelectedItem(Object anItem) {
        @SuppressWarnings("unchecked")
        A realItem = (A) anItem;
        try {
            cc.setSelectedElement(realItem);
        } catch (RecordNotFoundException e) {
            String msg = "RecordNotFoundException caught adapting combo box model set selected item: "
                    + e.toString();
            log.error(msg, e);
        }
    }

    @Override
    public Object getSelectedItem() {
        //      int index = cm.getSelectedItemIndex();
        //      log.debug("ComboViewModelAdaptor selected item index is " + index );
        return cm.getSelectedElement();
    }
}