【发布时间】:2014-02-20 08:53:47
【问题描述】:
如果这听起来像是一个基本问题,我很抱歉,但我对 java 比较陌生。我有一个从数据库中填充的 JComboBox,然后在 JTable 中使用它。我使用以下代码:
itemEditortxt = new JComboBox(buildComboBoxmodel("SELECT item_name FROM items ORDER BY item_name"));
AutoCompleteDecorator.decorate(itemEditortxt);
TableColumn ledgerColumn = invoicePurchasedTable.getColumnModel().getColumn(0);
ledgerColumn.setCellEditor(new ComboBoxCellEditor(itemEditortxt));
我正在尝试向 JComboBox 添加键侦听器,但由于某种原因,当我在焦点位于使用 JComboBox 的单元格上时按任意键时,它们不会被调用。以下是我添加垃圾的方法:
itemEditortxt.addKeyListener(new KeyListener() {
@Override
public void keyPressed(KeyEvent e) {System.out.print("line1");}
@Override
public void keyReleased(KeyEvent e) {System.out.print("line2");}
@Override
public void keyTyped(KeyEvent e) {System.out.print("line3");}
});
有人可以告诉我我做错了什么吗?谢谢。 以下是SSCCE。类似的JComboBox有两个,一个是正常添加的,一个是作为单元格编辑器使用的。在第一个中,用户可以使用键盘箭头,然后按 ENTER 以进行选择。表中的情况并非如此。谢谢:
package sp2;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import javax.swing.table.*;
import org.jdesktop.swingx.autocomplete.*;
class InvoicePurchasedModel extends DefaultTableModel {
public InvoicePurchasedModel (Vector<Vector<Object>> data, Vector<String> columnNames) {
super(data, columnNames);
}
@Override
public Class getColumnClass(int col) {
if (col == 0)
return String.class;
else
return Double.class;
}
}
public class SP2 {
JFrame mainPage;
JTabbedPane jtp;
JPanel mainPanel;
JPanel purchasedInvoicesPanel;
RXTable invoicePurchasedTable;
DefaultTableModel invoicePurchasedtm;
JComboBox itemEditortxt;
JComboBox itemEditortxt2;
SP2() {
mainPage = new JFrame("System");
mainPage.getContentPane().setLayout(new GridLayout());
mainPage.setSize(1200, 1200);
mainPage.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
createTabs();
mainPage.setVisible(true);
}
void createTabs() {
jtp = new JTabbedPane();
mainPanel = new JPanel();
mainPanel.setLayout(new GridLayout());
mainPage.getContentPane().add(jtp);
purchasedInvoicesPanel = new JPanel();
jtp.addTab("Purchased", purchasedInvoicesPanel);
invoicePurchasedtm = buildInvoicePurchasedTableModel();
invoicePurchasedTable = new RXTable(invoicePurchasedtm) {
private final KeyStroke tabKeyStroke = KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0);
public void changeSelection(int row, int column, boolean toggle, boolean extend)
{
super.changeSelection(row, column, toggle, extend);
if (editCellAt(row, column))
{
Component editor = getEditorComponent();
editor.requestFocusInWindow();
}
}
};
invoicePurchasedTable.setCellSelectionEnabled(true);
invoicePurchasedTable.setSelectAllForEdit(true);
purchasedInvoicesPanel.setLayout(new BoxLayout(purchasedInvoicesPanel, BoxLayout.PAGE_AXIS));
JPanel purchasedInvoicesPanel1 = new JPanel();
JPanel purchasedInvoicesPanel2 = new JPanel();
purchasedInvoicesPanel.add(purchasedInvoicesPanel1);
purchasedInvoicesPanel.add(purchasedInvoicesPanel2);
JScrollPane invoicePurchasedscrollPane = new JScrollPane(invoicePurchasedTable);
invoicePurchasedTable.setPreferredScrollableViewportSize(new Dimension(1000, 400));
String[] names = {"aa", "aa1", "aa2", "bb", "bb1", "bb2"};
itemEditortxt = new JComboBox(names);
itemEditortxt2 = new JComboBox(names);
AutoCompleteDecorator.decorate(itemEditortxt);
AutoCompleteDecorator.decorate(itemEditortxt2);
TableColumn ledgerColumn = invoicePurchasedTable.getColumnModel().getColumn(0);
ledgerColumn.setCellEditor(new ComboBoxCellEditor(itemEditortxt));
purchasedInvoicesPanel1.add(itemEditortxt2);
purchasedInvoicesPanel2.add(invoicePurchasedscrollPane);
}
public static DefaultTableModel buildInvoicePurchasedTableModel() {
Vector<String> columnNames = new Vector<String>();
columnNames.add("Item");
columnNames.add("Quantity");
columnNames.add("Unit Price");
columnNames.add("Amount");
Vector<Vector<Object>> data = new Vector<Vector<Object>>();
Vector<Object> vector = new Vector<Object>();
vector.add("");
vector.add(0.00);
vector.add(0.00);
vector.add(0.00);
data.add(vector);
return new InvoicePurchasedModel(data, columnNames);
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new SP2();
}
});
}
}
【问题讨论】:
-
ListSelectionListener 而不是 KeyListener
-
您是否要在组合框内的文本框中添加侦听器?
-
问题是在表格中使用的 jComboBox 中,用户无法使用回车键从下拉列表中进行选择。他必须使用鼠标。我希望使用回车键进行选择。我尝试使用 ListSelectionListener 和 DocumentListener 但在这两种情况下我都不知道用户何时按下回车键。我尝试向弹出菜单添加一个关键监听器:BasicComboPopup popup = (BasicComboPopup)itemEditortxt.getAccessibleContext().getAccessibleChild(0); JList 列表 = popup.getList(); list.addKeyListener(new KeyListener()...
-
不要使用 KeyListener - 特别是不要使用带有自动完成功能的组合(内部完成了一些繁重的工作,很可能会干扰你的工作)。而是解释您想要实现的什么,以便我们提出适当的解决方案
-
啊,请阅读您的评论并快速检查:worksform。因此,是时候让 SSCCE 证明问题了
标签: java swing jtable jcombobox swingx