[英]KeyListeners for a JComboBox which is used as a cell editor in a table
我很抱歉,如果這聽起來像一個基本問題,但我對java相對較新。 我有一個JComboBox,我從數據庫填充,然后在JTable中使用它。 我使用以下代碼執行此操作:
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));
我正在嘗試向JComboBox添加關鍵偵聽器,但由於某些原因,當焦點位於使用JComboBox的單元格上時按任意鍵時,它們不會被調用。 以下是我添加小說的方法:
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");}
});
有人可以告訴我,我做錯了什么? 謝謝。 以下是SSCCE。 有兩個類似的JComboBox,一個正常添加,另一個用作單元格編輯器。 在第一個用戶可以使用鍵盤箭頭,然后按ENTER鍵進行選擇。 表格中的情況並非如此。 謝謝:
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();
}
});
}
}
“我正在嘗試向JComboBox添加關鍵監聽器,但由於某些原因,當我將焦點放在使用JComboBox的單元格上時按任意鍵時,它們不會被調用。”
我認為你可能要做的是為組合框的“文本字段”添加一個監聽器。 您需要做的第一件事是實際獲取編輯器組件。 然后,您可以將DocumentListener
添加到JTextComponent
的Document
中
JTextComponent editor = (JTextComponent) comboBox.getEditor().getEditorComponent();
editor.getDocument().addDocumentListener(new DocumentListener(){
...
});
好的,問題是由AutoCompleteDecorator引起的。 我將其停用並改為使用AutoCompletion.enable(employeeDelete)。 現在,ENTER和TAB鍵按預期工作。 我感謝所有幫助我的評論。
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