import java.awt.Dimension;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.accessibility.AccessibleContext;
import javax.accessibility.AccessibleRole;
import javax.swing.DefaultListModel;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.ListModel;
import javax.swing.border.EmptyBorder;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class ListInput extends JPanel implements ListSelectionListener,
ActionListener {
protected JLabel label;
protected JTextField textfield;
protected JList list;
protected JScrollPane scrollPane;
public ListInput(String[] data, String title) {
setLayout(null);
setBorder(new EmptyBorder(5, 5, 5, 5));
label = new ListInputLabel(title, JLabel.LEFT);
add(label);
textfield = new ListInputText();
textfield.addActionListener(this);
label.setLabelFor(textfield); // NEW
add(textfield);
list = new ListInputList(data);
list.setVisibleRowCount(4);
list.addListSelectionListener(this);
scrollPane = new JScrollPane(list);
add(scrollPane);
}
public ListInput(String title, int numCols) {
setLayout(null);
setBorder(new EmptyBorder(5, 5, 5, 5));
label = new ListInputLabel(title, JLabel.LEFT);
add(label);
textfield = new ListInputText(numCols);
textfield.addActionListener(this);
label.setLabelFor(textfield); // NEW
add(textfield);
list = new ListInputList();
list.setVisibleRowCount(4);
list.addListSelectionListener(this);
scrollPane = new JScrollPane(list);
add(scrollPane);
}
public void setToolTipText(String text) {
super.setToolTipText(text);
label.setToolTipText(text);
textfield.setToolTipText(text);
list.setToolTipText(text);
}
public void setDisplayedMnemonic(char ch) {
label.setDisplayedMnemonic(ch);
}
public void setSelected(String sel) {
list.setSelectedValue(sel, true);
textfield.setText(sel);
}
public String getSelected() {
return textfield.getText();
}
public void setSelectedInt(int value) {
setSelected(Integer.toString(value));
}
public int getSelectedInt() {
try {
return Integer.parseInt(getSelected());
} catch (NumberFormatException ex) {
return -1;
}
}
public void valueChanged(ListSelectionEvent e) {
Object obj = list.getSelectedValue();
if (obj != null)
textfield.setText(obj.toString());
}
public void actionPerformed(ActionEvent e) {
ListModel model = list.getModel();
String key = textfield.getText().toLowerCase();
for (int i = 0; i < model.getSize(); i++) {
String data = (String) model.getElementAt(i);
if (data.toLowerCase().startsWith(key)) {
list.setSelectedValue(data, true);
break;
}
}
}
public void addListSelectionListener(ListSelectionListener lst) {
list.addListSelectionListener(lst);
}
public Dimension getPreferredSize() {
Insets ins = getInsets();
Dimension labelSize = label.getPreferredSize();
Dimension textfieldSize = textfield.getPreferredSize();
Dimension scrollPaneSize = scroll.getPreferredSize();
int w = Math.max(Math.max(labelSize.width, textfieldSize.width),
scrollPaneSize.width);
int h = labelSize.height + textfieldSize.height + scrollPaneSize.height;
return new Dimension(w + ins.left + ins.right, h + ins.top + ins.bottom);
}
public Dimension getMaximumSize() {
return getPreferredSize();
}
public Dimension getMinimumSize() {
return getPreferredSize();
}
public void doLayout() {
Insets ins = getInsets();
Dimension size = getSize();
int x = ins.left;
int y = ins.top;
int w = size.width - ins.left - ins.right;
int h = size.height - ins.top - ins.bottom;
Dimension labelSize = label.getPreferredSize();
label.setBounds(x, y, w, labelSize.height);
y += labelSize.height;
Dimension textfieldSize = textfield.getPreferredSize();
textfield.setBounds(x, y, w, textfieldSize.height);
y += textfieldSize.height;
scrollPane.setBounds(x, y, w, h - y);
}
public void appendResultSet(ResultSet results, int index,
boolean toTitleCase) {
textfield.setText("");
DefaultListModel model = new DefaultListModel();
try {
while (results.next()) {
String str = results.getString(index);
if (toTitleCase) {
str = Character.toUpperCase(str.charAt(0))
+ str.substring(1);
}
model.addElement(str);
}
} catch (SQLException ex) {
System.err.println("appendResultSet: " + ex.toString());
}
list.setModel(model);
if (model.getSize() > 0)
list.setSelectedIndex(0);
}
class ListInputLabel extends JLabel {
public ListInputLabel(String text, int alignment) {
super(text, alignment);
}
public AccessibleContext getAccessibleContext() {
return ListInput.this.getAccessibleContext();
}
}
class ListInputText extends JTextField {
public ListInputText() {
}
public ListInputText(int numCols) {
super(numCols);
}
public AccessibleContext getAccessibleContext() {
return ListInput.this.getAccessibleContext();
}
}
class ListInputList extends JList {
public ListInputList() {
}
public ListInputList(String[] data) {
super(data);
}
public AccessibleContext getAccessibleContext() {
return ListInput.this.getAccessibleContext();
}
}
// Accessibility Support
public AccessibleContext getAccessibleContext() {
if (accessibleContext == null)
accessibleContext = new AccessibleOpenList();
return accessibleContext;
}
protected class AccessibleOpenList extends AccessibleJComponent {
public String getAccessibleName() {
System.out.println("getAccessibleName: " + accessibleName);
if (accessibleName != null)
return accessibleName;
return label.getText();
}
public AccessibleRole getAccessibleRole() {
return AccessibleRole.LIST;
}
}
public static void main(String[] a) {
String[] fontNames = new String[] { "Roman", "Times Roman" };
ListInput lstFontName = new ListInput(fontNames, "Name:");
lstFontName.setDisplayedMnemonic('n');
lstFontName.setToolTipText("Font name");
JFrame f = new JFrame();
f.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
f.getContentPane().add(lstFontName);
f.pack();
f.setSize(new Dimension(300, 200));
f.show();
}
}