JMeter example source code file (JLabeledRadioI18N.java)

This example JMeter source code file (JLabeledRadioI18N.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - JMeter tags/keywords

actionlistener, arraylist, awt, buttongroup, buttongroup, changeevent, enumeration, enumeration, event, gui, jlabel, jlabeledradioi18n, jlabeledradioi18n, jradiobutton, list, string, string, swing, util

The JMeter JLabeledRadioI18N.java source code

/*
 * 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.apache.jmeter.gui.util;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.LinkedList;
import java.util.List;

import javax.swing.AbstractButton;
import javax.swing.ButtonGroup;
import javax.swing.ButtonModel;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.gui.JLabeledField;

/**
 * JLabeledRadio will create a set of Radio buttons with a label.
 * This is a version of the original JLabelledRadio class, but modified
 * to accept resource names rather than language strings.
 *
 */
public class JLabeledRadioI18N extends JPanel implements JLabeledField, ActionListener {

    private static final long serialVersionUID = 240L;

    private final JLabel mLabel = new JLabel();

    private final ButtonGroup bGroup = new ButtonGroup();

    private final ArrayList<ChangeListener> mChangeListeners = new ArrayList(3);

    /**
     *
     * @param label_resouce text resource name for group label
     * @param item_resources list of resource names for individual buttons
     * @param selectedItem button to be selected (if not null)
     */
    public JLabeledRadioI18N(String label_resouce, String[] item_resources, String selectedItem) {
        setLabel(label_resouce);
        init(item_resources, selectedItem);
    }

    /**
     * @deprecated - only for use in testing
     */
    @Deprecated
    public JLabeledRadioI18N() {
        super();
    }

    /**
     * Method is responsible for creating the JRadioButtons and adding them to
     * the ButtonGroup.
     *
     * The resource name is used as the action command for the button model,
     * and the reource value is used to set the button label.
     *
     * @param resouces list of resource names
     * @param selected initially selected resource (if not null)
     *
     */
    private void init(String[] resouces, String selected) {
        this.add(mLabel);
        for (int idx = 0; idx < resouces.length; idx++) {
            JRadioButton btn = new JRadioButton(JMeterUtils.getResString(resouces[idx]));
            btn.setActionCommand(resouces[idx]);
            btn.addActionListener(this);
            // add the button to the button group
            this.bGroup.add(btn);
            // add the button
            this.add(btn);
            if (selected != null && selected.equals(resouces[idx])) {
                btn.setSelected(true);
            }
        }
    }

    /**
     * The implementation will get the resource name from the selected radio button
     * in the JButtonGroup.
     */
    public String getText() {
        return this.bGroup.getSelection().getActionCommand();
    }

    /**
     * The implementation will iterate through the radio buttons and find the
     * match. It then sets it to selected and sets all other radio buttons as
     * not selected.
     * @param resourcename name of resource whose button is to be selected
     */
    public void setText(String resourcename) {
        Enumeration<AbstractButton> en = this.bGroup.getElements();
        while (en.hasMoreElements()) {
            ButtonModel model = en.nextElement().getModel();
            if (model.getActionCommand().equals(resourcename)) {
                this.bGroup.setSelected(model, true);
            } else {
                this.bGroup.setSelected(model, false);
            }
        }
    }

    /**
     * Set the group label from the resource name.
     *
     * @param label_resource
     */
    public final void setLabel(String label_resource) {
        this.mLabel.setText(JMeterUtils.getResString(label_resource));
    }

    /** {@inheritDoc} */
    public void addChangeListener(ChangeListener pChangeListener) {
        this.mChangeListeners.add(pChangeListener);
    }

    /**
     * Notify all registered change listeners that the text in the text field
     * has changed.
     */
    private void notifyChangeListeners() {
        ChangeEvent ce = new ChangeEvent(this);
        for (int index = 0; index < mChangeListeners.size(); index++) {
            mChangeListeners.get(index).stateChanged(ce);
        }
    }

    /**
     * Method will return all the label and JRadioButtons. ButtonGroup is
     * excluded from the list.
     */
    public List<JComponent> getComponentList() {
        List<JComponent> comps = new LinkedList();
        comps.add(mLabel);
        Enumeration<AbstractButton> en = this.bGroup.getElements();
        while (en.hasMoreElements()) {
            comps.add(en.nextElement());
        }
        return comps;
    }

    /**
     * When a radio button is clicked, an ActionEvent is triggered.
     */
    public void actionPerformed(ActionEvent e) {
        this.notifyChangeListeners();
    }

}