org.optaplanner.examples.common.swingui.components.LabeledComboBoxRenderer Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of optaplanner-examples Show documentation

OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.

There is a newer version: 9.44.0.Final

Show newest version

/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.optaplanner.examples.common.swingui.components;

import java.awt.Component;

import javax.swing.JComboBox;
import javax.swing.JList;
import javax.swing.ListCellRenderer;

/**
 * Display the user-friendly {@link Labeled#getLabel()} instead of the developer-friendly {@link Object#toString()}.
 */
public class LabeledComboBoxRenderer implements ListCellRenderer {

    public static void applyToComboBox(JComboBox comboBox) {
        comboBox.setRenderer(new LabeledComboBoxRenderer(comboBox.getRenderer()));
    }

    private final ListCellRenderer originalListCellRenderer;

    public LabeledComboBoxRenderer(ListCellRenderer originalListCellRenderer) {
        this.originalListCellRenderer = originalListCellRenderer;
    }

    @Override
    public Component getListCellRendererComponent(JList list, Object value, int index,
            boolean isSelected, boolean cellHasFocus) {
        String label = (value == null) ? "" : ((Labeled) value).getLabel();
        return originalListCellRenderer.getListCellRendererComponent(list, label, index, isSelected, cellHasFocus);
    }

}