我有一个带有自定义 TableCellRenderer
和自定义 TableCellEditor
的 JTable
。默认情况下,第一次单击表格行会从渲染器切换到编辑器,第二次单击选择该行。
有什么方法可以通过单击(然后切换到编辑器)选中该行?
我尝试过使用:
table.getSelectionModel().setSelectionInterval(row, row);
在我的 getTableCellEditorComponent
中但它不起作用,如果我将它添加到我的 getTableCellRendererComponent
它会起作用,但只是有时。
这是一个完整的例子:
public class SelectRowDemo extends JFrame {
public SelectRowDemo() {
CellRendererAndEditor rendererAndEditor = new CellRendererAndEditor();
StringTableModel model = new StringTableModel();
JTable table = new JTable(model);
table.setDefaultEditor(String.class, rendererAndEditor);
table.setDefaultRenderer(String.class, rendererAndEditor);
model.addElement("");
model.addElement("");
model.addElement("");
add(new JScrollPane(table));
pack();
setDefaultCloseOperation(EXIT_ON_CLOSE);
setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel("javax.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception e) {
e.printStackTrace();
}
new SelectRowDemo();
}
});
}
class CellRendererAndEditor extends AbstractCellEditor implements TableCellEditor, TableCellRenderer {
private final JLabel renderer = new JLabel();
private final JLabel editor = new JLabel();
@Override
public Object getCellEditorValue() {
return editor.getText();
}
@Override
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
String str = "renderer ";
str += (isSelected) ? "selected" : "not selected";
renderer.setText(str);
return renderer;
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value,
boolean isSelected, int row, int column) {
table.getSelectionModel().setSelectionInterval(row, row);
String str = "editor ";
str += (isSelected) ? "selected" : "not selected";
editor.setText(str);
return editor;
}
}
class StringTableModel extends AbstractTableModel {
private final List<String> data = new ArrayList<String>();
@Override
public int getColumnCount() {
return 1;
}
@Override
public int getRowCount() {
return data.size();
}
@Override
public Object getValueAt(int row, int column) {
return data.get(row);
}
@Override
public Class<?> getColumnClass(int column) {
return String.class;
}
@Override
public boolean isCellEditable(int row, int column) {
return true;
}
@Override
public void setValueAt(Object aValue, int row, int column) {
if(aValue instanceof String) {
data.set(row, (String)aValue);
fireTableRowsUpdated(row, column);
} else throw new IllegalStateException("aValue is not a String");
}
public void addElement(String s) {
data.add(s);
}
}
}
最佳答案
发生的事情是表格 UI 在更改选择之前开始编辑单元格。如果您在 getTableCellEditor() 和 shouldSelectCell() 中放置一个 println,编辑器首先被调用,isSelected == false,然后它调用 shouldSelectCell 并更改选择。
您可以在 BasicTableUI.adjustSelection(MouseEvent) 中确切地看到它发生的位置。
boolean dragEnabled = table.getDragEnabled();
if (!dragEnabled && !isFileList && table.editCellAt(pressedRow, pressedCol, e)) {
setDispatchComponent(e);
repostEvent(e);
}
CellEditor editor = table.getCellEditor();
if (dragEnabled || editor == null || editor.shouldSelectCell(e)) {
table.changeSelection(pressedRow, pressedCol,
BasicGraphicsUtils.isMenuShortcutKeyDown(e),
e.isShiftDown());
}
至于渲染目的,我只是将其渲染为选中 == true,因为它会在该事件完成处理之前完成。
关于java - 如何使用自定义 TableCellEditor 通过单击选择表格行?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8714919/