SliderTest.java Source code

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Here is the source code for SliderTest.java

Source

/*
   This program is a part of the companion code for Core Java 8th ed.
   (http://horstmann.com/corejava)
    
   This program 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.
    
   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
*/

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.util.Dictionary;
import java.util.Hashtable;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.JTextField;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

/**
 * @version 1.13 2007-06-12
 * @author Cay Horstmann
 */
public class SliderTest {
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                SliderTestFrame frame = new SliderTestFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
}

/**
 * A frame with many sliders and a text field to show slider values.
 */
class SliderTestFrame extends JFrame {
    public SliderTestFrame() {
        setTitle("SliderTest");
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

        sliderPanel = new JPanel();
        sliderPanel.setLayout(new FlowLayout(FlowLayout.LEFT));

        // common listener for all sliders
        listener = new ChangeListener() {
            public void stateChanged(ChangeEvent event) {
                // update text field when the slider value changes
                JSlider source = (JSlider) event.getSource();
                textField.setText("" + source.getValue());
            }
        };

        // add a plain slider

        JSlider slider = new JSlider();
        addSlider(slider, "Plain");

        // add a slider with major and minor ticks

        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(5);
        addSlider(slider, "Ticks");

        // add a slider that snaps to ticks

        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setSnapToTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(5);
        addSlider(slider, "Snap to ticks");

        // add a slider with no track

        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(5);
        slider.setPaintTrack(false);
        addSlider(slider, "No track");

        // add an inverted slider

        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(5);
        slider.setInverted(true);
        addSlider(slider, "Inverted");

        // add a slider with numeric labels

        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setPaintLabels(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(5);
        addSlider(slider, "Labels");

        // add a slider with alphabetic labels

        slider = new JSlider();
        slider.setPaintLabels(true);
        slider.setPaintTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(5);

        Dictionary<Integer, Component> labelTable = new Hashtable<Integer, Component>();
        labelTable.put(0, new JLabel("A"));
        labelTable.put(20, new JLabel("B"));
        labelTable.put(40, new JLabel("C"));
        labelTable.put(60, new JLabel("D"));
        labelTable.put(80, new JLabel("E"));
        labelTable.put(100, new JLabel("F"));

        slider.setLabelTable(labelTable);
        addSlider(slider, "Custom labels");

        // add a slider with icon labels

        slider = new JSlider();
        slider.setPaintTicks(true);
        slider.setPaintLabels(true);
        slider.setSnapToTicks(true);
        slider.setMajorTickSpacing(20);
        slider.setMinorTickSpacing(20);

        labelTable = new Hashtable<Integer, Component>();

        // add card images

        labelTable.put(0, new JLabel(new ImageIcon("nine.gif")));
        labelTable.put(20, new JLabel(new ImageIcon("ten.gif")));
        labelTable.put(40, new JLabel(new ImageIcon("jack.gif")));
        labelTable.put(60, new JLabel(new ImageIcon("queen.gif")));
        labelTable.put(80, new JLabel(new ImageIcon("king.gif")));
        labelTable.put(100, new JLabel(new ImageIcon("ace.gif")));

        slider.setLabelTable(labelTable);
        addSlider(slider, "Icon labels");

        // add the text field that displays the slider value

        textField = new JTextField();
        add(sliderPanel, BorderLayout.CENTER);
        add(textField, BorderLayout.SOUTH);
    }

    /**
     * Adds a slider to the slider panel and hooks up the listener
     * @param s the slider
     * @param description the slider description
     */
    public void addSlider(JSlider s, String description) {
        s.addChangeListener(listener);
        JPanel panel = new JPanel();
        panel.add(s);
        panel.add(new JLabel(description));
        sliderPanel.add(panel);
    }

    public static final int DEFAULT_WIDTH = 350;
    public static final int DEFAULT_HEIGHT = 450;

    private JPanel sliderPanel;
    private JTextField textField;
    private ChangeListener listener;
}