Mega Code Archive
Expense Table
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/*
Swing, Second Edition
by Matthew Robinson, Pavel Vorobiev
*/
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import java.text.SimpleDateFormat;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.table.*;
public class ExpenseReport extends JFrame
{
protected JTable m_table;
protected ExpenseReportData m_data;
protected JLabel m_title;
public ExpenseReport() {
super("Expense Report");
setSize(570, 200);
m_data = new ExpenseReportData(this);
m_table = new JTable();
m_table.setAutoCreateColumnsFromModel(false);
m_table.setModel(m_data);
m_table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
for (int k = 0; k < ExpenseReportData.m_columns.length; k++) {
TableCellRenderer renderer;
if (k==ExpenseReportData.COL_APPROVED)
renderer = new CheckCellRenderer();
else {
DefaultTableCellRenderer textRenderer =
new DefaultTableCellRenderer();
textRenderer.setHorizontalAlignment(
ExpenseReportData.m_columns[k].m_alignment);
renderer = textRenderer;
}
TableCellEditor editor;
if (k==ExpenseReportData.COL_CATEGORY)
editor = new DefaultCellEditor(new JComboBox(
ExpenseReportData.CATEGORIES));
else if (k==ExpenseReportData.COL_APPROVED)
editor = new DefaultCellEditor(new JCheckBox());
else
editor = new DefaultCellEditor(new JTextField());
TableColumn column = new TableColumn(k,
ExpenseReportData.m_columns[k].m_width,
renderer, editor);
m_table.addColumn(column);
}
JTableHeader header = m_table.getTableHeader();
header.setUpdateTableInRealTime(false);
JScrollPane ps = new JScrollPane();
ps.setSize(550, 150);
ps.getViewport().add(m_table);
getContentPane().add(ps, BorderLayout.CENTER);
JPanel p = new JPanel();
p.setLayout(new BoxLayout(p, BoxLayout.X_AXIS));
ImageIcon penny = new ImageIcon("penny.gif");
m_title = new JLabel("Total: $",
penny, JButton.LEFT);
m_title.setForeground(Color.black);
m_title.setAlignmentY(0.5f);
p.add(m_title);
p.add(Box.createHorizontalGlue());
JButton bt = new JButton("Insert before");
bt.setMnemonic('b');
bt.setAlignmentY(0.5f);
ActionListener lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
int row = m_table.getSelectedRow();
m_data.insert(row);
m_table.tableChanged(new TableModelEvent(
m_data, row, row, TableModelEvent.ALL_COLUMNS,
TableModelEvent.INSERT));
m_table.repaint();
}
};
bt.addActionListener(lst);
p.add(bt);
bt = new JButton("Insert after");
bt.setMnemonic('a');
bt.setAlignmentY(0.5f);
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
int row = m_table.getSelectedRow();
m_data.insert(row+1);
m_table.tableChanged(new TableModelEvent(
m_data, row+1, row+1, TableModelEvent.ALL_COLUMNS,
TableModelEvent.INSERT));
m_table.repaint();
}
};
bt.addActionListener(lst);
p.add(bt);
bt = new JButton("Delete row");
bt.setMnemonic('d');
bt.setAlignmentY(0.5f);
lst = new ActionListener() {
public void actionPerformed(ActionEvent e) {
int row = m_table.getSelectedRow();
if (m_data.delete(row)) {
m_table.tableChanged(new TableModelEvent(
m_data, row, row, TableModelEvent.ALL_COLUMNS,
TableModelEvent.INSERT));
m_table.repaint();
calcTotal();
}
}
};
bt.addActionListener(lst);
p.add(bt);
getContentPane().add(p, BorderLayout.SOUTH);
calcTotal();
WindowListener wndCloser = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
};
addWindowListener(wndCloser);
setVisible(true);
}
public void calcTotal() {
double total = 0;
for (int k=0; k<m_data.getRowCount(); k++) {
Double amount = (Double)m_data.getValueAt(k,
ExpenseReportData.COL_AMOUNT);
total += amount.doubleValue();
}
m_title.setText("Total: $"+total);
}
public static void main(String argv[]) {
new ExpenseReport();
}
}
class CheckCellRenderer extends JCheckBox implements TableCellRenderer
{
protected static Border m_noFocusBorder;
public CheckCellRenderer() {
super();
m_noFocusBorder = new EmptyBorder(1, 2, 1, 2);
setOpaque(true);
setBorder(m_noFocusBorder);
}
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus,
int row, int column)
{
if (value instanceof Boolean) {
Boolean b = (Boolean)value;
setSelected(b.booleanValue());
}
setBackground(isSelected && !hasFocus ?
table.getSelectionBackground() : table.getBackground());
setForeground(isSelected && !hasFocus ?
table.getSelectionForeground() : table.getForeground());
setFont(table.getFont());
setBorder(hasFocus ? UIManager.getBorder(
"Table.focusCellHighlightBorder") : m_noFocusBorder);
return this;
}
}
class ExpenseData
{
public Date m_date;
public Double m_amount;
public Integer m_category;
public Boolean m_approved;
public String m_description;
public ExpenseData() {
m_date = new Date();
m_amount = new Double(0);
m_category = new Integer(1);
m_approved = new Boolean(false);
m_description = "";
}
public ExpenseData(Date date, double amount, int category,
boolean approved, String description)
{
m_date = date;
m_amount = new Double(amount);
m_category = new Integer(category);
m_approved = new Boolean(approved);
m_description = description;
}
}
class ColumnData
{
public String m_title;
int m_width;
int m_alignment;
public ColumnData(String title, int width, int alignment) {
m_title = title;
m_width = width;
m_alignment = alignment;
}
}
class ExpenseReportData extends AbstractTableModel
{
public static final ColumnData m_columns[] = {
new ColumnData( "Date", 80, JLabel.LEFT ),
new ColumnData( "Amount", 80, JLabel.RIGHT ),
new ColumnData( "Category", 130, JLabel.LEFT ),
new ColumnData( "Approved", 80, JLabel.LEFT ),
new ColumnData( "Description", 180, JLabel.LEFT )
};
public static final int COL_DATE = 0;
public static final int COL_AMOUNT = 1;
public static final int COL_CATEGORY = 2;
public static final int COL_APPROVED = 3;
public static final int COL_DESCR = 4;
public static final String[] CATEGORIES = {
"Fares", "Logging", "Business meals", "Others"
};
protected ExpenseReport m_parent;
protected SimpleDateFormat m_frm;
protected Vector m_vector;
public ExpenseReportData(ExpenseReport parent) {
m_parent = parent;
m_frm = new SimpleDateFormat("MM/dd/yy");
m_vector = new Vector();
setDefaultData();
}
public void setDefaultData() {
m_vector.removeAllElements();
try {
m_vector.addElement(new ExpenseData(
m_frm.parse("04/06/99"), 200, 0, true,
"Airline tickets"));
m_vector.addElement(new ExpenseData(
m_frm.parse("04/06/99"), 50, 2, false,
"Lunch with client"));
m_vector.addElement(new ExpenseData(
m_frm.parse("04/06/99"), 120, 1, true,
"Hotel"));
}
catch (java.text.ParseException ex) {}
}
public int getRowCount() {
return m_vector==null ? 0 : m_vector.size();
}
public int getColumnCount() {
return m_columns.length;
}
public String getColumnName(int column) {
return m_columns[column].m_title;
}
public boolean isCellEditable(int nRow, int nCol) {
return true;
}
public Object getValueAt(int nRow, int nCol) {
if (nRow < 0 || nRow>=getRowCount())
return "";
ExpenseData row = (ExpenseData)m_vector.elementAt(nRow);
switch (nCol) {
case COL_DATE: return m_frm.format(row.m_date);
case COL_AMOUNT: return row.m_amount;
case COL_CATEGORY: return CATEGORIES[row.m_category.intValue()];
case COL_APPROVED: return row.m_approved;
case COL_DESCR: return row.m_description;
}
return "";
}
public void setValueAt(Object value, int nRow, int nCol) {
if (nRow < 0 || nRow>=getRowCount())
return;
ExpenseData row = (ExpenseData)m_vector.elementAt(nRow);
String svalue = value.toString();
switch (nCol) {
case COL_DATE:
Date date = null;
try {
date = m_frm.parse(svalue);
}
catch (java.text.ParseException ex) {
date = null;
}
if (date == null) {
JOptionPane.showMessageDialog(null,
svalue+" is not a valid date",
"Warning", JOptionPane.WARNING_MESSAGE);
return;
}
row.m_date = date;
break;
case COL_AMOUNT:
try {
row.m_amount = new Double(svalue);
}
catch (NumberFormatException e) { break; }
m_parent.calcTotal();
break;
case COL_CATEGORY:
for (int k=0; k<CATEGORIES.length; k++)
if (svalue.equals(CATEGORIES[k])) {
row.m_category = new Integer(k);
break;
}
break;
case COL_APPROVED:
row.m_approved = (Boolean)value;
break;
case COL_DESCR:
row.m_description = svalue;
break;
}
}
public void insert(int row) {
if (row < 0)
row = 0;
if (row > m_vector.size())
row = m_vector.size();
m_vector.insertElementAt(new ExpenseData(), row);
}
public boolean delete(int row) {
if (row < 0 || row >= m_vector.size())
return false;
m_vector.remove(row);
return true;
}
}
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