ObjectSelectionComboBox.java

/**
 * *****************************************************************************
 * Copyright 2013 Johannes Mitlmeier
 *
 * 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 de.fub.agg2graph.ui.gui;

import java.awt.Component;
import java.util.HashMap;
import java.util.Map;
import javax.swing.DefaultListCellRenderer;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.ListCellRenderer;

public class ObjectSelectionComboBox extends JComboBox {

    private static final long serialVersionUID = 1L;
    private final Map<Object, String> texts = new HashMap<Object, String>(10);

    @SuppressWarnings("unchecked")
    public ObjectSelectionComboBox() {
        super();
        setRenderer(new ComboBoxRenderer(texts));
    }

    @SuppressWarnings("unchecked")
    public void addItem(Object item, String name) {
        texts.put(item, name);
        addItem(item);
    }

    private class ComboBoxRenderer extends JLabel implements ListCellRenderer {

        private static final long serialVersionUID = 1L;
        private final Map<Object, String> textMap;
        private final DefaultListCellRenderer dlcr = new DefaultListCellRenderer();

        public ComboBoxRenderer(Map<Object, String> textMap) {
            this.textMap = textMap;
        }

        @Override
        public Component getListCellRendererComponent(JList list, Object value,
                int index, boolean isSelected, boolean cellHasFocus) {
            return dlcr.getListCellRendererComponent(list, textMap.get(value),
                    index, isSelected, cellHasFocus);
        }
    }
}