我一直试图在JTable中添加一个可点击的按钮，但我的表现并不好。
我使用ButtonColumn类来执行此操作，但操作被忽略 - 按钮显示但单击时没有任何操作。
/**
* The ButtonColumn class provides a renderer and an editor that looks like a
* JButton. The renderer and editor will then be used for a specified column
* in the table. The TableModel will contain the String to be displayed on
* the button.
*
* The button can be invoked by a mouse click or by pressing the space bar
* when the cell has focus. Optionally a mnemonic can be set to invoke the
* button. When the button is invoked the provided Action is invoked. The
* source of the Action will be the table. The action command will contain
* the model row number of the button that was clicked.
*
*/
public class ButtonColumn extends AbstractCellEditor
implements TableCellRenderer, TableCellEditor, ActionListener, MouseListener{
/**
*
*/
private static final long serialVersionUID = -6737467999355167233L;
private JTable table;
private Action action;
private int mnemonic;
private Border originalBorder;
private Border focusBorder;
private JButton renderButton;
private JButton editButton;
private Object editorValue;
private boolean isButtonColumnEditor;
/**
* Create the ButtonColumn to be used as a renderer and editor. The
* renderer and editor will automatically be installed on the TableColumn
* of the specified column.
*
* @param table the table containing the button renderer/editor
* @param action the Action to be invoked when the button is invoked
* @param column the column to which the button renderer/editor is added
*/
public ButtonColumn(JTable table, Action action, int column)
{
this.table = table;
this.action = action;
renderButton = new JButton();
editButton = new JButton();
editButton.setFocusPainted( false );
editButton.addActionListener( this );
originalBorder = editButton.getBorder();
setFocusBorder( new LineBorder(Color.BLUE) );
TableColumnModel columnModel = table.getColumnModel();
columnModel.getColumn(column).setCellRenderer( this );
columnModel.getColumn(column).setCellEditor( this );
table.addMouseListener( this );
}
/**
* Get foreground color of the button when the cell has focus
*
* @return the foreground color
*/
public Border getFocusBorder()
{
return focusBorder;
}
/**
* The foreground color of the button when the cell has focus
*
* @param focusBorder the foreground color
*/
public void setFocusBorder(Border focusBorder)
{
this.focusBorder = focusBorder;
editButton.setBorder( focusBorder );
}
public int getMnemonic()
{
return mnemonic;
}
/**
* The mnemonic to activate the button when the cell has focus
*
* @param mnemonic the mnemonic
*/
public void setMnemonic(int mnemonic)
{
this.mnemonic = mnemonic;
renderButton.setMnemonic(mnemonic);
editButton.setMnemonic(mnemonic);
}
@Override
public Component getTableCellEditorComponent(
JTable table, Object value, boolean isSelected, int row, int column)
{
if (value == null)
{
editButton.setText( "" );
editButton.setIcon( null );
}
else if (value instanceof Icon)
{
editButton.setText( "" );
editButton.setIcon( (Icon)value );
}
else
{
editButton.setText( value.toString() );
editButton.setIcon( null );
}
this.editorValue = value;
return editButton;
}
@Override
public Object getCellEditorValue()
{
return editorValue;
}
//
// Implement TableCellRenderer interface
//
@Override
public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
{
if (isSelected)
{
renderButton.setForeground(table.getSelectionForeground());
renderButton.setBackground(table.getSelectionBackground());
}
else
{
renderButton.setForeground(table.getForeground());
renderButton.setBackground(UIManager.getColor("Button.background"));
}
if (hasFocus)
{
renderButton.setBorder( focusBorder );
}
else
{
renderButton.setBorder( originalBorder );
}
// renderButton.setText( (value == null) ? "" : value.toString() );
if (value == null)
{
renderButton.setText( "" );
renderButton.setIcon( null );
}
else if (value instanceof Icon)
{
renderButton.setText( "" );
renderButton.setIcon( (Icon)value );
}
else
{
renderButton.setText( value.toString() );
renderButton.setIcon( null );
}
return renderButton;
}
//
// Implement ActionListener interface
//
/*
* The button has been pressed. Stop editing and invoke the custom Action
*/
@Override
public void actionPerformed(ActionEvent e)
{
int row = table.convertRowIndexToModel( table.getEditingRow() );
fireEditingStopped();
// Invoke the Action
ActionEvent event = new ActionEvent(
table,
ActionEvent.ACTION_PERFORMED,
"" + row);
action.actionPerformed(event);
}
//
// Implement MouseListener interface
//
/*
* When the mouse is pressed the editor is invoked. If you then then drag
* the mouse to another cell before releasing it, the editor is still
* active. Make sure editing is stopped when the mouse is released.
*/
@Override
public void mousePressed(MouseEvent e)
{
if (table.isEditing()
&& table.getCellEditor() == this)
isButtonColumnEditor = true;
}
@Override
public void mouseReleased(MouseEvent e)
{
if (isButtonColumnEditor
&& table.isEditing())
table.getCellEditor().stopCellEditing();
isButtonColumnEditor = false;
}
@Override
public void mouseClicked(MouseEvent e) {}
@Override
public void mouseEntered(MouseEvent e) {}
@Override
public void mouseExited(MouseEvent e) {}
}
我的实际代码：
ButtonColumn deleteColumn = new ButtonColumn(eventTable, new AbstractAction(){
@Override
public void actionPerformed(ActionEvent e) {
System.out.println("It works!!!!");
}
}, 3);
似乎永远不会被打印出来。我真的可以使用一些帮助。提前谢谢！
编辑：我也尝试过此代码，但似乎也无效。
eventTable.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
JTable target = (JTable)e.getSource();
int row = target.getSelectedRow();
int column = target.getSelectedColumn();
System.out.println("Event table was clicked in row "+row+", column "+column);
}
});
答案 0 :(得分：0)
看一下TableCellRenderer解释。
答案 1 :(得分：0)
我的猜测是该列不可编辑，这意味着永远不会调用编辑器，因此永远不会调用Action。
如果这没有帮助，请发布一个正确的SSCCE来证明问题。