import java.awt.*;

import java.awt.event.*;

import java.beans.*;

import java.util.Random;

import javax.swing.*;

import javax.swing.border.*;

import javax.swing.event.*;

public class FormScrollerDemo extends JPanel

implements ActionListener, ChangeListener, ItemListener

{

private FormScroller scroller;

private JSpinner top;

private JSpinner bottom;

private JSpinner left;

private JSpinner right;

FormScrollerDemo()

{

setLayout( new BorderLayout(10, 10) );

setBorder( new EmptyBorder(10, 10, 10, 10) );

JComponent left = createLeftPanel();

JComponent right = createRightPanel();

add(left, BorderLayout.CENTER);

add(right, BorderLayout.EAST);

}

private JComponent createLeftPanel()

{

Box content = new Box( BoxLayout.Y_AXIS );

Random random = new Random();

int groups = random.nextInt(10) + 5;

for (int i = 0; i < groups; i++)

{

content.add( createGroup(i) );

}

JScrollPane scrollPane = new JScrollPane( content );

scroller = new FormScroller( scrollPane );

scroller.setScrollInsets( new Insets(5, 0, 5, 0) );

return scrollPane;

}

private JComponent createGroup(int title)

{

Box group = new Box( BoxLayout.Y_AXIS );

group.setBorder( new CompoundBorder(new LineBorder(Color.RED), new TitledBorder("Group " + title)) );

Random random = new Random();

int details = random.nextInt(3) + 1;

for (int i = 0; i < details; i++)

{

group.add( createDetail(i) );

}

return group;

}

private JComponent createDetail(int title)

{

JPanel detail = new JPanel( new GridLayout(0, 2, 5, 5) );

detail.setBorder( new TitledBorder("Detail " + title) );

Random random = new Random();

int rows = random.nextInt(3) + 1;

for (int i = 0; i < rows; i++)

{

detail.add(new JLabel("Label " + i));

detail.add(new JTextField(5));

}

return detail;

}

public JPanel createRightPanel()

{

RelativeLayout rl = new RelativeLayout(RelativeLayout.Y_AXIS);

rl.setAlignment(RelativeLayout.LEADING);

rl.setFill( true );

JPanel main = new JPanel( rl );

JPanel type = new JPanel();

type.setBorder( new TitledBorder("Scroll Type") );

JComboBox<FormScroller.Type> comboBox = new JComboBox<>();

comboBox.addItem( FormScroller.Type.COMPONENT );

comboBox.addItem( FormScroller.Type.PARENT );

comboBox.addItem( FormScroller.Type.CHILD );

comboBox.addActionListener( this );

type.add( comboBox );

main.add( type );

JPanel insets = new JPanel( new GridLayout(0, 2, 5, 5) );

insets.setBorder( new TitledBorder("Scroll Insets:") );

top = new JSpinner(new SpinnerNumberModel(5, 0, 100 ,5));

top.addChangeListener( this );

insets.add( top );

insets.add( new JLabel("Top") );

bottom = new JSpinner(new SpinnerNumberModel(5, 0, 100 ,5));

bottom.addChangeListener( this );

insets.add( bottom );

insets.add( new JLabel("Bottom") );

left = new JSpinner(new SpinnerNumberModel(0, 0, 100 ,5));

left.addChangeListener( this );

insets.add( left );

insets.add( new JLabel("Left") );

right = new JSpinner(new SpinnerNumberModel(0, 0, 100 ,5));

right.addChangeListener( this );

insets.add( right );

insets.add( new JLabel("Right") );

main.add( insets );

JCheckBox scrollingEnabled = new JCheckBox("Scrolling Enabled");

scrollingEnabled.setSelected( true );

scrollingEnabled.addItemListener( this );

main.add( scrollingEnabled );

return main;

}

public void actionPerformed(ActionEvent e)

{

JComboBox comboBox = (JComboBox)e.getSource();

scroller.setType( (FormScroller.Type)comboBox.getSelectedItem() );

}

public void itemStateChanged(ItemEvent e)

{

JCheckBox checkBox = (JCheckBox)e.getSource();

scroller.setScrollingEnabled( checkBox.isSelected() );

}

public void stateChanged(ChangeEvent e)

{

Insets scrollInsets = new Insets(

(Integer)top.getValue(), (Integer)left.getValue(), (Integer)bottom.getValue(), (Integer)right.getValue());

scroller.setScrollInsets( scrollInsets );

}

public static void main(String[] args)

{

SwingUtilities.invokeLater(new Runnable() {

public void run() {

createAndShowGUI();

}

});

}

public static void createAndShowGUI()

{

JFrame frame = new JFrame("Form Scroller");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.add( new FormScrollerDemo() );

frame.setSize(400, 300);

// frame.pack();

frame.setLocationRelativeTo(null);

frame.setVisible(true);

}

}