samples/swing/src/main/java/org/qi4j/lib/swing/binding/internal/PropertyFocusLostListener.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.qi4j.lib.swing.binding.internal;

import org.qi4j.api.property.Property;
import org.qi4j.lib.swing.binding.SwingAdapter;

import javax.swing.*;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

class PropertyFocusLostListener
    implements FocusListener
{

    private final JComponent component;
    private SwingAdapter adapter;
    private Property actual;

    public PropertyFocusLostListener( JComponent component )
    {
        this.component = component;
    }

    void use( SwingAdapter adapterToUse, Property actual )
    {
        adapter = adapterToUse;
        this.actual = actual;
    }

    public void focusGained( FocusEvent e )
    {
    }

    public void focusLost( FocusEvent e )
    {
        if( adapter != null )
        {
            adapter.fromSwingToProperty( component, actual );
        }
    }
}