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tips4javatips4java
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‎source/MarqueePanelDemo.java‎

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import java.awt.*;
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import java.awt.event.*;
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//import java.beans.*;
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import javax.swing.*;
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import javax.swing.border.*;
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import javax.swing.event.*;
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public class MarqueePanelDemo extends JPanel
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implements ActionListener, ChangeListener, ItemListener
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{
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private MarqueePanel marquee;
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private JSpinner scrollFrequency;
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private JSpinner scrollAmount;
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private JSpinner preferredWidth;
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private JSpinner wrapAmount;
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MarqueePanelDemo()
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{
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setLayout( new BorderLayout(10, 10) );
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setBorder( new EmptyBorder(10, 10, 10, 10) );
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setBackground( Color.ORANGE );
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JComponent north = createNorthPanel();
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JComponent center = createCenterPanel();
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JComponent south = createSouthPanel();
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add(north, BorderLayout.NORTH);
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add(center, BorderLayout.CENTER);
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add(south, BorderLayout.SOUTH);
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}
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private JComponent createNorthPanel()
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{
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marquee = new MarqueePanel();
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marquee.setPreferredWidth( 199 );
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marquee.setOpaque(false);
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JLabel label1 = new JLabel();
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label1.setText("Here is a long string of text.");
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Font f = (new Font("SansSerif", Font.PLAIN, 24));
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label1.setFont( f );
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marquee.add( label1 );
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// add an image here
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String path = "dukeWaveRed.gif";
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java.net.URL imgURL = getClass().getResource(path);
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ImageIcon duke = new ImageIcon(imgURL, path);
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JLabel label2 = new JLabel( duke );
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marquee.add( label2 );
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JPanel panel = new JPanel();
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panel.setOpaque(false);
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panel.add( marquee );
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return panel;
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}
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public JPanel createCenterPanel()
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{
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RelativeLayout rl = new RelativeLayout(RelativeLayout.Y_AXIS);
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rl.setAlignment(RelativeLayout.LEADING);
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rl.setFill( true );
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JPanel main = new JPanel( rl );
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JPanel insets = new JPanel( new GridLayout(0, 2, 5, 5) );
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scrollFrequency = new JSpinner(new SpinnerNumberModel(5, 1, 1000 ,2));
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scrollFrequency.addChangeListener( this );
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insets.add( scrollFrequency );
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insets.add( new JLabel("Scroll Frequency") );
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scrollAmount = new JSpinner(new SpinnerNumberModel(5, 1, 10 ,1));
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scrollAmount.addChangeListener( this );
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insets.add( scrollAmount );
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insets.add( new JLabel("Scroll Amount") );
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preferredWidth = new JSpinner(new SpinnerNumberModel(199, -1, 399 ,50));
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preferredWidth.addChangeListener( this );
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insets.add( preferredWidth );
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insets.add( new JLabel("Preferred Width") );
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main.add( insets );
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JCheckBox wrap = new JCheckBox("Wrap");
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wrap.setSelected( false );
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wrap.addItemListener( this );
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main.add( wrap );
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JPanel wrapPanel = new JPanel( new GridLayout(0, 2, 5, 5) );
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wrapAmount = new JSpinner(new SpinnerNumberModel(50, 0, 500 ,25));
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wrapAmount.setEnabled( false );
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wrapAmount.addChangeListener( this );
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wrapPanel.add( wrapAmount );
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wrapPanel.add( new JLabel("Wrap Amount") );
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main.add( wrapPanel );
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JCheckBox scrollWhenFocused = new JCheckBox("Scroll When Focused");
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scrollWhenFocused.setSelected( true );
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scrollWhenFocused.addItemListener( this );
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main.add( scrollWhenFocused );
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JPanel panel = new JPanel();
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panel.add( main );
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return panel;
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}
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private JComponent createSouthPanel()
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{
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JPanel panel = new JPanel();
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JButton start = new JButton( "Start" );
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start.addActionListener( this );
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panel.add( start );
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JButton stop = new JButton( "Stop" );
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stop.addActionListener( this );
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panel.add( stop );
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JButton pause = new JButton( "Pause" );
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pause.addActionListener( this );
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panel.add( pause );
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JButton resume = new JButton( "Resume" );
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resume.addActionListener( this );
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panel.add( resume );
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return panel;
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}
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public void actionPerformed(ActionEvent e)
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{
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String command = e.getActionCommand();
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if ("Start".equals( command ) )
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marquee.startScrolling();
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if ("Stop".equals( command ) )
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marquee.stopScrolling();
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if ("Pause".equals( command ) )
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marquee.pauseScrolling();
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if ("Resume".equals( command ) )
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marquee.resumeScrolling();
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}
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public void itemStateChanged(ItemEvent e)
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{
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JCheckBox checkBox = (JCheckBox)e.getSource();
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String command = checkBox.getText();
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if ("Wrap".equals(command))
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{
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marquee.setWrap( checkBox.isSelected() );
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wrapAmount.setEnabled( checkBox.isSelected() );
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}
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else
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marquee.setScrollWhenFocused( checkBox.isSelected() );
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}
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public void stateChanged(ChangeEvent e)
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{
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marquee.setScrollFrequency( (Integer)scrollFrequency.getValue() );
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marquee.setScrollAmount( (Integer)scrollAmount.getValue() );
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marquee.setPreferredWidth( (Integer)preferredWidth.getValue() );
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marquee.setWrapAmount( (Integer)wrapAmount.getValue() );
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}
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public static void main(String[] args)
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{
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SwingUtilities.invokeLater(new Runnable() {
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public void run() {
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createAndShowGUI();
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}
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});
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}
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public static void createAndShowGUI()
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{
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JFrame frame = new JFrame("Marquee Panel");
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frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
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frame.add( new MarqueePanelDemo() );
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frame.pack();
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frame.setLocationRelativeTo(null);
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frame.setVisible(true);
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}
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}

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