Java:JTable 内的 JComboBox - setSelectedIndex 对 GUI 没有影响

Question

我有一个包含两列的 JTable。第二列有不同的编辑器(JTextField、JComboBox 和 CheckComboBox)，每行一个。到目前为止，这工作得很好，但是我已经实现了一个重置​​选项，它将整个 JTable 更改回原始状态(重置所有更改)。

我现在面临的问题是，当我以编程方式更改 ComboBox 的索引 setSelectedIndex 时尽管模型使用 fireTableDataChanged 触发了更改，但我在 GUI 中看不到任何结果。并且也由 TableModelListener 接收表的。当我查找更改后的 ComboBox 时，我也得到了正确的索引，但它没有显示在 GUI 中。我也尝试了方法revalidate , updateUI和repaint没有任何改变。

问题可能出在它的架构上(也许是渲染器？)。这是我的编辑器/渲染器类。

class VEachRowEditor implements TableCellEditor, TableCellRenderer {

protected Hashtable<Integer, TableCellEditor> editors;
protected TableCellEditor editor, defaultEditor, renderer;
JTable table;
VEachRowEditorManager rowmanager;

public VEachRowEditor(JTable table, VEachRowEditorManager rowmanager) {
    this.table = table;
    editors = new Hashtable<Integer, TableCellEditor>();
    defaultEditor = new DefaultCellEditor(new JTextField());
    this.rowmanager = rowmanager;
}

public void setEditorAt(int row, TableCellEditor editor) {
    if (editor instanceof DefaultCellEditor)
        ((DefaultCellEditor) editor).setClickCountToStart(1);
    editors.put(new Integer(row), editor);
}

public Component getTableCellEditorComponent(JTable table, Object value,
        boolean isSelected, int row, int column) {
    editor = (TableCellEditor) editors.get(new Integer(row));
    if (editor == null) {
        editor = defaultEditor;
    }
    return editor.getTableCellEditorComponent(table, value, isSelected,
            row, column);
}

public Object getCellEditorValue() {
    return editor.getCellEditorValue();
}

public final boolean stopCellEditing() {
    return editor.stopCellEditing();
}

public void cancelCellEditing() {
    editor.cancelCellEditing();
}

public boolean isCellEditable(EventObject anEvent) {
    selectEditor((MouseEvent) anEvent);
    return editor.isCellEditable(anEvent);
}

public void addCellEditorListener(CellEditorListener l) {
    editor.addCellEditorListener(l);
}

public void removeCellEditorListener(CellEditorListener l) {
    editor.removeCellEditorListener(l);
}

public boolean shouldSelectCell(EventObject anEvent) {
    selectEditor((MouseEvent) anEvent);
    return editor.shouldSelectCell(anEvent);
}

protected void selectEditor(MouseEvent e) {
    int row;
    if (e == null) {
        row = table.getSelectionModel().getAnchorSelectionIndex();
    } else {
        row = table.rowAtPoint(e.getPoint());
    }
    editor = (TableCellEditor) editors.get(new Integer(row));
    if (editor == null) {
        System.out.println(editor);
        editor = defaultEditor;
    }
}

@Override
public Component getTableCellRendererComponent(JTable table, Object value,
        boolean isSelected, boolean hasFocus, int row, int column) {
    renderer = (TableCellEditor) editors.get(new Integer(row));
    if (renderer == null) {
        renderer = defaultEditor;
    }

    return renderer.getTableCellEditorComponent(table, value, isSelected,
            row, column);
}

}

是 getTableCellEditorComponent错了？

rowmanager包含所有模型的所有 JComboBox 和 CheckComboBox。

Answer 1

when I programmatical change the index of a ComboBox with setSelectedIndex I see no result in the GUI

渲染器和编辑器仅显示模型中的数据。不要重置编辑器组件。

重置模型中的数据。即>

table.setValueAt(...); // or
table.getModel().setValueAt(...);