Java CellEditorListener不会检测单元格何时被编辑
我正在进行我的“顶点”项目,准备在本学期毕业,在我正在进行的项目中遇到了一些问题。代码是为“意外发现”书商计划编写的。我将为一家虚拟书店设计一个销售点系统 目前,当用户编辑给定行的“数量”单元格时,我一直在尝试更新“总计”列(第5列)。“数量”字段还需要验证其单元格中的值是否不大于库存数量(第1列) 我还阅读了Java教程,昨晚在Google上搜索了几个小时,试图找到一些关于如何让CellEditorListener工作的有用代码 我以前也尝试过让CashierPanel类实现CellEditorListener,并通过以下方式进行注册:Java CellEditorListener不会检测单元格何时被编辑,java,swing,jtable,Java,Swing,Jtable,我正在进行我的“顶点”项目,准备在本学期毕业,在我正在进行的项目中遇到了一些问题。代码是为“意外发现”书商计划编写的。我将为一家虚拟书店设计一个销售点系统 目前,当用户编辑给定行的“数量”单元格时,我一直在尝试更新“总计”列(第5列)。“数量”字段还需要验证其单元格中的值是否不大于库存数量(第1列) 我还阅读了Java教程,昨晚在Google上搜索了几个小时,试图找到一些关于如何让CellEditorListener工作的有用代码 我以前也尝试过让CashierPanel类实现CellEdito
CellEditorListener listener = null;
table.getDefaultEditor(String.class).addCellEditorListener(listener);
这种方法也不起作用
下面是我现在拥有的代码(217行):
/*导入的依赖项*/
导入java.awt.BorderLayout;
导入java.awt.Color;
导入java.awt.event.ActionEvent;
导入java.awt.event.ActionListener;
导入java.awt.event.KeyAdapter;
导入java.awt.event.KeyEvent;
导入java.math.BigDecimal;
导入java.math.RoundingMode;
导入java.util.ArrayList;
导入javax.swing.DefaultCellEditor;
导入javax.swing.JFrame;
导入javax.swing.JLabel;
导入javax.swing.JPanel;
导入javax.swing.JScrollPane;
导入javax.swing.JTable;
导入javax.swing.JTextField;
导入javax.swing.event.CellEditorListener;
导入javax.swing.event.ChangeEvent;
导入javax.swing.table.AbstractTableModel;
导入javax.swing.table.DefaultTableCellRenderer;
导入javax.swing.table.TableColumn;
导入net.miginfocom.swing.MigLayout;
公共类出纳面板扩展JFrame{
/**
*串行版本
*/
私有静态最终长serialVersionUID=6922826100788686147L;
/*私人领域*/
私人JPanel搜索小组;
私人JLabel isbn_lbl;
私人JLabel所有权_lbl;
私人JTextField isbn_tf;
私人JTextField title_tf;
私有JTextField-currentCell;
私人藏书;
私有出纳表模型表数据;
私有CellEditorListener侦听器;
/**
*建造师
*/
公共出纳小组(){
//设置窗口属性
setTitle(“测试此表”);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
设置大小(585300);
setLayout(新的BorderLayout());
tableData=新出纳TableModel();
最终JTable表=新JTable(tableData);
表2.设置行高(25);
table.getTableHeader().setReorderingAllowed(false);
table.setCellSelectionEnabled(真);
table.putClientProperty(“terminateEditOnFocusLost”,Boolean.TRUE);
添加(新的JScrollPane(表),BorderLayout.CENTER);
//定义单元渲染器以将文本渲染到单元的中心
DefaultTableCellRenderer centerRenderer=新的DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment(JLabel.CENTER);
//设置列属性
int[]大小=新的int[]{50,50,87,275,50,50};
字符串[]columnNames=新字符串[]{“数量”、“库存”、“ISBN”、“标题”,
“价格”、“总额”};
TableColumn[]column=新的TableColumn[columnNames.length];
for(字节i=0;i/* Imported Dependencies */
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;
import javax.swing.DefaultCellEditor;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableColumn;
import net.miginfocom.swing.MigLayout;
public class CashierPanel extends JFrame {
/**
* Serial Version UID
*/
private static final long serialVersionUID = 6922826100788686147L;
/* Private Fields */
private JPanel searchPanel;
private JLabel isbn_lbl;
private JLabel title_lbl;
private JTextField isbn_tf;
private JTextField title_tf;
private JTextField currentCell;
private BookCollection myCollection;
private CashierTableModel tableData;
private CellEditorListener listener;
/**
* Constructor
*/
public CashierPanel() {
// Set window properties
setTitle("Testing this table");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(585, 300);
setLayout(new BorderLayout());
tableData = new CashierTableModel();
final JTable table = new JTable(tableData);
table.setRowHeight(25);
table.getTableHeader().setReorderingAllowed(false);
table.setCellSelectionEnabled(true);
table.putClientProperty("terminateEditOnFocusLost", Boolean.TRUE);
add(new JScrollPane(table), BorderLayout.CENTER);
// Define a cell renderer to render text to center of cell
DefaultTableCellRenderer centerRenderer = new DefaultTableCellRenderer();
centerRenderer.setHorizontalAlignment(JLabel.CENTER);
// Set column properties
int[] sizes = new int[] { 50, 50, 87, 275, 50, 50 };
String[] columnNames = new String[] { "Qty", "Stock", "ISBN", "Title",
"Price", "Total" };
TableColumn[] column = new TableColumn[columnNames.length];
for (byte i = 0; i < columnNames.length; i++) {
column[i] = table.getColumnModel().getColumn(i);
column[i].setMinWidth(sizes[i]);
column[i].setHeaderValue(columnNames[i]);
if (i != 3) {
column[i].setMaxWidth(sizes[i]);
column[i].setCellRenderer(centerRenderer);
}
}
/* Make the quantity field only display digits */
currentCell = new JTextField();
column[0].setCellEditor(new DefaultCellEditor(currentCell));
// Add a key listener to the current cell
currentCell.addKeyListener(new KeyAdapter() {
public void keyTyped(KeyEvent e) {
// if the key typed is not a digit or backspace
if (!Character.isDigit(e.getKeyChar())
&& e.getKeyChar() != KeyEvent.VK_BACK_SPACE) {
currentCell.setEditable(false);
currentCell.setBackground(Color.WHITE);
} else {
currentCell.setEditable(true);
}
}
});
/* Search panel */
searchPanel = new JPanel();
myCollection = new BookCollection();
isbn_lbl = new JLabel("Search by ISBN:");
isbn_tf = new JTextField();
isbn_tf.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
ArrayList<BookData> data = myCollection.select(isbn_tf.getText(), BookCollection.FIELD_ISBN);
tableData.addNewRow();
table.setValueAt((new BigDecimal("1").toString()), tableData.getRowCount() - 1, 0);
table.setValueAt(Integer.toString(data.get(0).getQtyOnHand()), tableData.getRowCount() - 1, 1);
table.setValueAt(data.get(0).getIsbn(),tableData.getRowCount() - 1, 2);
table.setValueAt(data.get(0).getTitle(),tableData.getRowCount() - 1, 3);
table.setValueAt(data.get(0).getRetail().setScale(2, RoundingMode.HALF_UP).toString(), tableData.getRowCount() - 1, 4);
table.setValueAt(table.getValueAt(tableData.getRowCount() - 1, 4), tableData.getRowCount() - 1, 5);
isbn_tf.setText("");
}
});
title_lbl = new JLabel("Search by Title:");
title_tf = new JTextField();
title_tf.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
ArrayList<BookData> data = myCollection.select(title_tf.getText(), BookCollection.FIELD_TITLE);
tableData.addNewRow();
table.setValueAt((new BigDecimal("1").toString()), tableData.getRowCount(), 0);
table.setValueAt(Integer.toString(data.get(0).getQtyOnHand()), tableData.getRowCount() - 1, 1);
table.setValueAt(data.get(0).getIsbn(), tableData.getRowCount(), 2);
table.setValueAt(data.get(0).getTitle(), tableData.getRowCount(), 3);
table.setValueAt(data.get(0).getRetail().setScale(2, RoundingMode.HALF_UP).toString(), tableData.getRowCount(), 4);
table.setValueAt(data.get(0).getRetail().setScale(2, RoundingMode.HALF_UP).toString(), tableData.getRowCount(), 5);
title_tf.setText("");
}
});
searchPanel.setLayout(new MigLayout("", "[78px][202px,grow]", "[24px][29px]"));
searchPanel.add(isbn_lbl, "cell 0 0, alignx left, aligny center");
searchPanel.add(isbn_tf, "cell 1 0,growx, aligny center");
searchPanel.add(title_lbl, "cell 0 1, alignx left, aligny center");
searchPanel.add(title_tf, "cell 1 1, growx, aligny center");
add(searchPanel, BorderLayout.SOUTH);
};
public static void main(String[] args) {
CashierPanel myCashierPanel = new CashierPanel();
myCashierPanel.setVisible(true);
}
}
class CashierTableModel extends AbstractTableModel implements CellEditorListener{
/**
*
*/
private static final long serialVersionUID = -1500952132717353189L;
private ArrayList<Object[]> data = new ArrayList<Object[]>();
public void addNewRow() {
data.add(new String[] { null, null, null, null, null, null });
fireTableDataChanged();
}
public int getRowCount() {
return data.size();
}
public int getColumnCount() {
return 6;
}
public Object getValueAt(int row, int col) {
return data.get(row)[col];
}
public void setValueAt(Object value, int row, int col) {
data.get(row)[col] = value;
fireTableCellUpdated(row, col);
}
public boolean isCellEditable(int row, int col) {
if (col > 0) {
return false;
} else {
return true;
}
}
public void editingCanceled(ChangeEvent e) {
for (int i = 0; i <= getRowCount() - 1; i++) {
BigDecimal[] data = new BigDecimal[3];
data[0] = data[0].add((BigDecimal) getValueAt(i, 1));
data[1] = data[1].add((BigDecimal) getValueAt(i, 4));
data[2] = data[2].add(calculateTotal(data[0], data[1]));
setValueAt(data[2], i, 5);
}
}
public void editingStopped(ChangeEvent e) {
for (int i = 0; i <= getRowCount() - 1; i++) {
BigDecimal[] data = new BigDecimal[3];
data[0] = data[0].add((BigDecimal) getValueAt(i, 1));
data[1] = data[1].add((BigDecimal) getValueAt(i, 4));
data[2] = data[2].add(calculateTotal(data[0], data[1]));
setValueAt(data[2], i, 5);
}
}
public BigDecimal calculateTotal(BigDecimal qty, BigDecimal retail) {
BigDecimal total = new BigDecimal("0.00");
total = total.add(qty.multiply(retail));
return total;
}
}