在我的JTable
实现中。我必须保持一些列可编辑,一些列不可编辑,所以我必须覆盖isCellEditable
-
@Override
public boolean isCellEditable(int row, int col) {
if (col == uneditableColumn) {
return false;
}
return bEdit;
}
现在我的要求是只允许双击时编辑单元格,即如果用户双击单元格,则只有它进入可编辑模式。为此,我将不得不制作您自己的CellEditor
和覆盖。
public boolean isCellEditable( EventObject e )
有人能建议是否可以使用-
public boolean isCellEditable(int row, int col)
请提供帮助-
is to allow edit the cell only on Double click i.e. if user double clicks
on cell then only it comes into editable mode.
您已经查看了DefaultCellEditor#clickCountToStart
对于CellEditor或方法,覆盖isCellEditable(AbstractTableModel)
@Override
public boolean isCellEditable(EventObject anEvent) {
if (anEvent instanceof MouseEvent) {
return ((MouseEvent) anEvent).getClickCount() >= clickCountToStart;
}
return true;
}
对于DefaultTableModel,它可能是吗
import javax.swing.*;
import javax.swing.UIManager.LookAndFeelInfo;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.*;
public class EditorRendererClickCountToStart {
public EditorRendererClickCountToStart() {
TableModel model = new DefaultTableModel(new Object[][]{
{"A", "Item 0"}, {"B", "Item 1"}, {"C", "Item 2"},
{"D", "Item 3"}, {"E", "Item 4"}}, new String[]{"TextField", "Combo"});
JTable table = new JTable(model);
table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
DefaultCellEditor editor = new DefaultCellEditor(new JComboBox(new Object[]{
"Item 0", "Item 1", "Item 2", "Item 3", "Item 4"}));
editor.setClickCountToStart(2);
table.getColumnModel().getColumn(1).setCellEditor(editor);
table.setPreferredScrollableViewportSize(table.getPreferredSize());
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new JScrollPane(table));
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
try {
for (LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
System.out.println(info.getName());
if ("Nimbus".equals(info.getName())) {
UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (UnsupportedLookAndFeelException e) {// handle exception
} catch (ClassNotFoundException e) {// handle exception
} catch (InstantiationException e) {// handle exception
} catch (IllegalAccessException e) {// handle exception
}
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
new EditorRendererClickCountToStart();
}
});
}
}
好吧,我不会在JTable
中重写isCellEditable(...)
,而是提供一个自定义的表模型。
从JTable#isCellEditable(...)
:上的JavaDoc
该列是按表视图的显示顺序指定的,而不是按TableModel的列顺序指定的。这是一个重要的区别,因为当用户重新排列表中的列时,视图中给定索引处的列将发生变化。同时,用户的操作永远不会影响模型的列顺序。
此外,单元格对表来说可能是可编辑的,但编辑器本身可能在双击之前不会提供输入字段。如果您想一次只编辑一个单元格,您可以将该信息存储在模型中,并让编辑器进行检查。