import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class SliderTest extends JFrame {
private JSlider diameter;
private OvalPanel myPanel;
public SliderTest()
{
super( "Slider Demo" );
myPanel = new OvalPanel();
myPanel.setBackground( Color.yellow );
diameter = new JSlider( SwingConstants.HORIZONTAL,
0, 200, 10 );
diameter.setMajorTickSpacing( 10 );
diameter.setPaintTicks( true );
diameter.addChangeListener(
new ChangeListener() {
public void stateChanged( ChangeEvent e )
{
myPanel.setDiameter( diameter.getValue() );
}
}
);
Container c = getContentPane();
c.add( diameter, BorderLayout.SOUTH );
c.add( myPanel, BorderLayout.CENTER );
setSize( 220, 270 );
show();
}
public static void main( String args[] )
{
SliderTest app = new SliderTest();
app.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class SliderDemo extends JFrame
implements ActionListener {
//Set up animation parameters.
static final int FPS_INIT = 15; //initial frames per second
int frameNumber = 0;
int delay;
Timer timer;
boolean frozen = false;
//This label uses ImageIcon to show the doggy pictures.
JLabel picture;
public SliderDemo(String windowTitle) {
super(windowTitle);
delay = 1000 / FPS_INIT;
//Create the slider and its label
JLabel sliderLabel = new JLabel("Frames Per Second", JLabel.CENTER);
sliderLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
JSlider framesPerSecond = new JSlider(JSlider.HORIZONTAL,
0, 30, FPS_INIT);
framesPerSecond.addChangeListener(new SliderListener());
//Turn on labels at major tick marks.
framesPerSecond.setMajorTickSpacing(10);
framesPerSecond.setMinorTickSpacing(1);
framesPerSecond.setPaintTicks(true);
framesPerSecond.setPaintLabels(true);
framesPerSecond.setBorder(
BorderFactory.createEmptyBorder(0,0,10,0));
//Create the label for the animation.
picture = new JLabel(new ImageIcon("doggy/T"
+ frameNumber
+ ".gif"),
JLabel.CENTER);
picture.setAlignmentX(Component.CENTER_ALIGNMENT);
picture.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createLoweredBevelBorder(),
BorderFactory.createEmptyBorder(10,10,10,10)));
//Put everything in the content pane.
JPanel contentPane = new JPanel();
contentPane.setLayout(new BoxLayout(contentPane, BoxLayout.Y_AXIS));
contentPane.add(sliderLabel);
contentPane.add(framesPerSecond);
contentPane.add(picture);
contentPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
setContentPane(contentPane);
//Set up a timer that calls this object's action handler.
timer = new Timer(delay, this);
timer.setInitialDelay(delay * 10); //pauses animation after frames
//0 and 6 by restarting the timer
timer.setCoalesce(true);
//Add a listener for window events
addWindowListener(new WindowAdapter() {
public void windowIconified(WindowEvent e) {
stopAnimation();
}
public void windowDeiconified(WindowEvent e) {
startAnimation();
}
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
/** Listens to the slider. */
class SliderListener implements ChangeListener {
public void stateChanged(ChangeEvent e) {
JSlider source = (JSlider)e.getSource();
if (!source.getValueIsAdjusting()) {
int fps = (int)source.getValue();
if (fps == 0) {
if (!frozen) stopAnimation();
} else {
delay = 1000 / fps;
timer.setDelay(delay);
timer.setInitialDelay(delay * 10);
if (frozen) startAnimation();
}
}
}
}
public void startAnimation() {
//Start (or restart) animating!
timer.start();
frozen = false;
}
public void stopAnimation() {
//Stop the animating thread.
timer.stop();
frozen = true;
}
//Called when the Timer fires
public void actionPerformed(ActionEvent e) {
//Advance the animation frame.
if (frameNumber==13) {
frameNumber = 0;
} else {
frameNumber++;
}
//XXX no caching?
picture.setIcon(new ImageIcon("doggy/T"
+ frameNumber
+ ".gif"));
if (frameNumber==0 || frameNumber==6) {
timer.restart();
}
}
public static void main(String[] args) {
SliderDemo animator = new SliderDemo("SliderDemo");
animator.pack();
animator.setVisible(true);
animator.startAnimation();
}
}
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.Hashtable;
public class SliderDemo2 extends JFrame
implements ActionListener {
//Set up animation parameters.
static final int FPS_INIT = 15; //initial frames per second
int frameNumber = 0;
int delay;
Timer timer;
boolean frozen = false;
//This label uses ImageIcon to show the doggy pictures.
JLabel picture;
public SliderDemo2(String windowTitle) {
super(windowTitle);
delay = 1000 / FPS_INIT;
//Create the slider.
JSlider framesPerSecond = new JSlider(JSlider.VERTICAL,
0, 30, FPS_INIT);
framesPerSecond.addChangeListener(new SliderListener());
framesPerSecond.setMajorTickSpacing(10);
framesPerSecond.setPaintTicks(true);
//Create the label table.
Hashtable labelTable = new Hashtable();
//PENDING: could use images, but we don't have any good ones.
labelTable.put(new Integer( 0 ),
new JLabel("Stop") );
//new JLabel(new ImageIcon("images/stop.gif")) );
labelTable.put(new Integer( 3 ),
new JLabel("Slow") );
//new JLabel(new ImageIcon("images/slow.gif")) );
labelTable.put(new Integer( 30 ),
new JLabel("Fast") );
//new JLabel(new ImageIcon("images/fast.gif")) );
framesPerSecond.setLabelTable(labelTable);
framesPerSecond.setPaintLabels(true);
framesPerSecond.setBorder(
BorderFactory.createEmptyBorder(0,0,0,10));
//Create the label for the animation.
picture = new JLabel(new ImageIcon("doggy/T"
+ frameNumber
+ ".gif"),
JLabel.CENTER);
picture.setAlignmentX(Component.CENTER_ALIGNMENT);
picture.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createLoweredBevelBorder(),
BorderFactory.createEmptyBorder(10,10,10,10)));
//Put everything in the content pane.
JPanel contentPane = new JPanel();
contentPane.setLayout(new BorderLayout());
contentPane.add(framesPerSecond, BorderLayout.WEST);
contentPane.add(picture, BorderLayout.CENTER);
contentPane.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
setContentPane(contentPane);
//Set up a timer that calls this object's action handler.
timer = new Timer(delay, this);
timer.setInitialDelay(delay * 10); //pauses animation after frames
//0 and 6 by restarting the timer
timer.setCoalesce(true);
//Add a listener for window events
addWindowListener(new WindowAdapter() {
public void windowIconified(WindowEvent e) {
stopAnimation();
}
public void windowDeiconified(WindowEvent e) {
startAnimation();
}
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
/** Listens to the slider. */
class SliderListener implements ChangeListener {
public void stateChanged(ChangeEvent e) {
JSlider source = (JSlider)e.getSource();
if (!source.getValueIsAdjusting()) {
int fps = (int)source.getValue();
if (fps == 0) {
if (!frozen) stopAnimation();
} else {
delay = 1000 / fps;
timer.setDelay(delay);
timer.setInitialDelay(delay * 10);
if (frozen) startAnimation();
}
}
}
}
public void startAnimation() {
//Start (or restart) animating!
timer.start();
frozen = false;
}
public void stopAnimation() {
//Stop the animating thread.
timer.stop();
frozen = true;
}
//Called when the Timer fires
public void actionPerformed(ActionEvent e) {
//Advance the animation frame.
if (frameNumber==13) {
frameNumber = 0;
} else {
frameNumber++;
}
//XXX no caching?
picture.setIcon(new ImageIcon("doggy/T"
+ frameNumber
+ ".gif"));
if (frameNumber==0 || frameNumber==6) {
timer.restart();
}
}
public static void main(String[] args) {
SliderDemo2 animator = new SliderDemo2("SliderDemo2");
animator.pack();
animator.setVisible(true);
animator.startAnimation();
}
}
Maintained by John Loomis, last updated 20 June 2000