Java 获得焦点后,在JTable中的单元格中开始编辑
我已按以下方式为表中的两列定义了单元格编辑器: Java代码:Java 获得焦点后,在JTable中的单元格中开始编辑,java,swing,focus,jtable,tablecelleditor,Java,Swing,Focus,Jtable,Tablecelleditor,我已按以下方式为表中的两列定义了单元格编辑器: Java代码: JComboBox combo = new JComboBox(); //code to add items to the combo box goes here. JTextField textField = new JTextField(); textField.setHorizontalAlignment(JTextField.RIGHT); TableColumn column = myJTable.getColumnM
JComboBox combo = new JComboBox();
//code to add items to the combo box goes here.
JTextField textField = new JTextField();
textField.setHorizontalAlignment(JTextField.RIGHT);
TableColumn column = myJTable.getColumnModel().getColumn(0);
column.setCellEditor(new DefaultCellEditor(combo));
column = myJTable.getColumnModel().getColumn(1);
column.setCellEditor(new DefaultCellEditor(textField));
我面临的问题是,当焦点移动到表格单元格时,该单元格不会自动编辑。因此,当焦点移动到第2列(其中有一个文本字段作为编辑器)时,除非双击单元格或用户开始键入,否则插入符号不会出现。第1列的情况类似(它有一个组合框作为编辑器),因为在这里,除非单击单元格,否则组合框不会出现。这些行为违反直觉,对于使用键盘操作的用户来说是不可取的:(
请就如何解决这一问题提出建议
提前谢谢
JTextField
覆盖JTable
中的editCellAt()
,该表具有DefaultCellEditor
JTable
定义的startEditing
操作:
table.getInputMap().put(
KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0), "startEditing");
如上所述,您可以使用JComboBox作为渲染器和编辑器
您还可以使用
JComboBox
作为单元格呈现程序。您还可以利用来覆盖默认的双击行为。
import java.awt.Component;
import javax.swing.DefaultCellEditor;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
public class ComboBoxEditorDemo {
public static void main(String args[]) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
private static void createAndShowGUI() {
JFrame frame = new JFrame("ComboBoxEditorDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTable table = new JTable(
new Object[][] { { "1", "2" }, { "1", "2" } },
new Object[] {"Col1", "Col2" });
table.setRowHeight(24);
TableColumn column = table.getColumnModel().getColumn(1);
column.setCellRenderer(new MyComboBoxRenderer(new String[] { "1", "2", "3" }));
column.setCellEditor(new MyComboBoxEditor(new String[] { "1", "2", "3" }));
DefaultCellEditor editor = new DefaultCellEditor(new JTextField());
editor.setClickCountToStart(1);
column = table.getColumnModel().getColumn(0);
column.setCellEditor(editor);
JScrollPane scrollPane = new JScrollPane(table);
frame.add(scrollPane);
frame.pack();
frame.setVisible(true);
}
static class MyComboBoxRenderer extends JComboBox implements
TableCellRenderer {
public MyComboBoxRenderer(String[] items) {
super(items);
}
public Component getTableCellRendererComponent(JTable table,
Object value, boolean isSelected, boolean hasFocus, int row,
int column) {
if (isSelected) {
setForeground(table.getSelectionForeground());
super.setBackground(table.getSelectionBackground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
}
setSelectedItem(value);
return this;
}
}
static class MyComboBoxEditor extends DefaultCellEditor {
public MyComboBoxEditor(String[] items) {
super(new JComboBox(items));
}
}
}