Question

我要向JTable提供多细胞编辑功能:双点击仍会使选定电池(标准行为)的价值丧失活力,而右侧电动应打开一个“Edit选定电池”的烟云。

When the user hits this menu entry, the last cell in the selected range becomes editable. The other selected cells remain selected. Then they write the new value and, when the edition is finished (usually by hitting Enter), all of the selected cells get this value.

简单地说,要假设所有囚室都含有同样的价值类型,即ger。

Here s the code that shows up the popup dialog, to get started:

table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);
table.setCellSelectionEnabled(true);
table.addMouseListener(new MouseAdapter() {
    @Override
    public void mousePressed(MouseEvent e) {
        if (e.isPopupTrigger()) {
            doPop(e);
        }
    }

    @Override
    public void mouseReleased(MouseEvent e) {
        if (e.isPopupTrigger()) {
            doPop(e);
        }
    }

    private void doPop(MouseEvent e) {
        MultiEditPopUp menu = new MultiEditPopUp(tblRanges);
        menu.show(e.getComponent(), e.getX(), e.getY());
    }
});


class MultiEditPopUp extends JPopupMenu {
    JMenuItem menuItem;

    MultiEditPopUp(JTable table) {
        menuItem = new JMenuItem("Edit selected");
        menuItem.setAction(new BulkEditAction(table));
        add(menuItem);
    }
}

class BulkEditAction extends AbstractAction {
    private final JTable table;

    public BulkEditAction(JTable table) {
        this.table = table;
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        // TODO: let the user edit the last cell, and then apply to the others
    }
}

How can I do such a thing?

Answer 1

这个问题还不清楚。基本办法将是

store the selected cells
let the user edit one of them
at the end, take the edited value and set it to all cells formerly stored

我所看到的唯一微薄部分是“最终”的探测(因为编辑的生命周期没有明确界定)。一些法典

public class BulkEditAction extends AbstractAction {
    JTable table;
    List selectedCells;

    public BulkEditAction(JTable table) {
        this.table = table;
    }

    @Override
    public void actionPerformed(ActionEvent actionEvent) {

        // store, here rows only, refine for cell selection
        selectedCells = Arrays.asList(table.getSelectedRows());
        final int rowToEdit =  // ...
        final int columnToEdit = // ...
        table.editCellAt(rowToEdit, columnToEdit);
        CellEditorListener l = new CellEditorListener() {

            @Override
            public void editingStopped(ChangeEvent e) {
                ((AbstractCellEditor) e.getSource()).removeCellEditorListener(this);
                propagateEditedValue(rowToEdit, columnToEdit);

            }

            @Override
            public void editingCanceled(ChangeEvent e) {
                ((AbstractCellEditor) e.getSource()).removeCellEditorListener(this);
            }
        };
        table.getCellEditor().addCellEditorListener(l);
    }

    private void propagateEditedValue(final int row, final int column) {
        // need to invoke to be sure that the table has updated itself after
        // editingStopped
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                // foreach selectedCell (with coordinates selectedRow/-column
                table.setValueAt(table.getValueAt(row, column), selectedRow, selectedColumn);
            }
        });
    }
}

Answer 2

我将延长JTable,以建立多功能电子计算机。

public class MultiCellEditJTable extends JTable{

    public MultiCellEditJTable(){
        setColumnSelectionAllowed(true);
        getSelectionModel().setSelectionMode(DefaultListSelectionModel.MULTIPLE_INTERVAL_SELECTION);
    }


    @Override
    public Component prepareEditor(TableCellEditor editor, int row, int column){
        Component component = super.prepareEditor(editor, row, column);

        if(component instanceof JTextField){
            JTextField textField = (JTextField)component;
            textField.selectAll();
        }

        return component;
    }


    @Override
    public void editingStopped(ChangeEvent e){
        int editingRow = getEditingRow();
        int editingColumn = getEditingColumn();

        super.editingStopped(e);

        if(1 < getSelectedRowCount() && 1 == getSelectedColumnCount() && editingColumn == getSelectedColumn()){
            Object value = getValueAt(editingRow, editingColumn);
            Arrays.stream(getSelectedRows()).filter(row->row != editingRow).forEach(row->
              setValueAt(value, row, editingColumn)
            );
        }
    }
}

当选定一栏的多行和一根洗.器时,所有选定电池的数值均按胎盘计算。

作为额外奖金,我让编辑挑选所有人,在选择一系列牢房后,履行仅仅能够打造预期价值的职能。否则,首先必须恢复现值。

友情链接