JTable con Checkbox

[alzehimer_cerebral]

Haber si alguien me puede hechar una mano:

Tengo una columna en la JTable que tiene JCheckBox inicializado a false, necesito recoger el evento (cuando un usuario hace click y la pone como true), la cuestion es que no se donde se recoge el evento... Alguien me puede especificar en que metodo se recoge el cambio de la celda?? Una vez recoja el evento necesito saber en que fila de la JTable se ha realizado para asi poder proceder a eliminar dicho elemento....

Bueno al final he optado por extender JCheckBox e implementar  TableCellEditor:

Código (java) [Seleccionar] Expandir



package gui;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.util.EventObject;
import java.util.LinkedList;
import javax.swing.JCheckBox;
import javax.swing.JTable;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.table.TableCellEditor;

/**
*
* @author Gasuco
*/
public class TableEditor extends JCheckBox implements TableCellEditor {


     /**
      * Constructor por defecto.
      */
     public TableEditor()
     {
         // Se le ponen las opciones al JCheckBox
         super.setSelected(new Boolean(false));

         // Nos apuntamos a cuando se seleccione algo, para avisar a la tabla
         // de que hemos cambiado el dato.
         this.addActionListener(new ActionListener() {
             public void actionPerformed (ActionEvent evento)
             {
                 editado(true);
             }
         });

         // Nos apuntamos a la pérdida de foco, que quiere decir que se ha
         // dejado de editar la celda, sin aceptar ninguna opción. Avisamos
         // a la tabla de la cancelación de la edición.
         this.addFocusListener(new FocusListener() {
             public void focusGained (FocusEvent e) {;}
             public void focusLost (FocusEvent e)
             {
                 editado (false);
             }
         });
     }

     /** Adds a listener to the list that's notified when the editor
      * stops, or cancels editing.
      *
      * @param l the CellEditorListener
      *
      */
     public void addCellEditorListener(CellEditorListener l) {
         // Se añade el suscriptor a la lista.
         suscriptores.add (l);
     }

     /** Tells the editor to cancel editing and not accept any partially
      * edited value.
      *
      */
     public void cancelCellEditing() {
         // No hay que hacer nada especial.
     }

     /** Returns the value contained in the editor.
      * @return the value contained in the editor
      *
      */
     public Object getCellEditorValue() {
         Boolean aux= false;
         // Se obtiene la opción del JCheckBox elegida y se devuelve un
         // Booleano adecuado.
         if (this.isSelected())
         {
             aux=true;
         }

         else{
             aux=false;
         }


         return aux;
     }

     /**  Sets an initial <code>value</code> for the editor.  This will cause
      *  the editor to <code>stopEditing</code> and lose any partially
      *  edited value if the editor is editing when this method is called. <p>
      *
      *  Returns the component that should be added to the client's
      *  <code>Component</code> hierarchy.  Once installed in the client's
      *  hierarchy this component will then be able to draw and receive
      *  user input.
      *
      * @param table the <code>JTable</code> that is asking the
      * editor to edit; can be <code>null</code>
      * @param value the value of the cell to be edited; it is
      * up to the specific editor to interpret
      * and draw the value.  For example, if value is
      * the string "true", it could be rendered as a
      * string or it could be rendered as a check
      * box that is checked.  <code>null</code>
      * is a valid value
      * @param isSelected true if the cell is to be rendered with
      * highlighting
      * @param row      the row of the cell being edited
      * @param column  the column of the cell being edited
      * @return the component for editing
      *
      */
     public Component getTableCellEditorComponent(JTable table, Object value,
        boolean isSelected, int row, int column) {
            // Devolvemos el JCheckBox del que heredamos.
            return this;
     }

     /** Asks the editor if it can start editing using <code>anEvent</code>.
      * <code>anEvent</code> is in the invoking component coordinate system.
      * The editor can not assume the Component returned by
      * <code>getCellEditorComponent</code> is installed.  This method
      * is intended for the use of client to avoid the cost of setting up
      * and installing the editor component if editing is not possible.
      * If editing can be started this method returns true.
      *
      * @param anEvent the event the editor should use to consider
      * whether to begin editing or not
      * @return true if editing can be started
      * @see #shouldSelectCell
      *
      */
     public boolean isCellEditable(EventObject anEvent) {
         // La celda es editable ante cualquier evento.
         return true;
     }

     /** Removes a listener from the list that's notified
      *
      * @param l the CellEditorListener
      *
      */
     public void removeCellEditorListener(CellEditorListener l) {
         // Se elimina el suscriptor.
         suscriptores.remove(l);
     }

     /** Returns true if the editing cell should be selected, false otherwise.
      * Typically, the return value is true, because is most cases the editing
      * cell should be selected.  However, it is useful to return false to
      * keep the selection from changing for some types of edits.
      * eg. A table that contains a column of check boxes, the user might
      * want to be able to change those checkboxes without altering the
      * selection.  (See Netscape Communicator for just such an example)
      * Of course, it is up to the client of the editor to use the return
      * value, but it doesn't need to if it doesn't want to.
      *
      * @param anEvent the event the editor should use to start
      * editing
      * @return true if the editor would like the editing cell to be selected;
      *    otherwise returns false
      * @see #isCellEditable
      *
      */
     public boolean shouldSelectCell(EventObject anEvent) {
         // Indica si al editar la celda, debemos seleccionar la fila que la
         // contiene.
         return true;
     }

     /** Tells the editor to stop editing and accept any partially edited
      * value as the value of the editor.  The editor returns false if
      * editing was not stopped; this is useful for editors that validate
      * and can not accept invalid entries.
      *
      * @return true if editing was stopped; false otherwise
      *
      */
     public boolean stopCellEditing() {
         // Indica si se puede detener la edición.
         return true;
     }

     /**
      * Si cambiado es true, se avisa a los suscriptores de que se ha terminado
      * la edición. Si es false, se avisa de que se ha cancelado la edición.
      */
     protected void editado(boolean cambiado)
     {
         ChangeEvent evento = new ChangeEvent (this);
         int i;
         for (i=0; i<suscriptores.size(); i++)
         {
             CellEditorListener aux = (CellEditorListener)suscriptores.get(i);
             if (cambiado)
                aux.editingStopped(evento);
             else
                aux.editingCanceled(evento);
         }
     }

     /** Lista de suscriptores */
     private LinkedList suscriptores = new LinkedList();



[Leyer]

en este metodo agregale algo asi.

Código (java) [Seleccionar] Expandir

     public Component getTableCellEditorComponent(JTable table, Object value,
        boolean isSelected, int row, int column) {
          if(isSelected){
    System.out.println("---------------");
        System.out.println(table.getSelectedRow());
        System.out.println(value);
        System.out.println("---------------");
  }
            return this;
     }

[alzehimer_cerebral]

L-EYER gracias por la res, lo he añadido y al clics sobre la tabla nunca entra en esa funcion...  Alguna otra idea??  Estoy atascado y no se como continuar.

Saludos.

alzehimer_cerebral

[Leyer]

mmm que raro bueno te dejo un ejemplo  simple de como se haria

Código (java) [Seleccionar] Expandir

import java.awt.Component;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.EventObject;
import java.util.Hashtable;

import javax.swing.DefaultCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.event.CellEditorListener;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;

class CheckBoxRenderer extends JCheckBox implements TableCellRenderer { // Importante********
private static final long serialVersionUID = 1L;

   CheckBoxRenderer() {
    setHorizontalAlignment(JLabel.CENTER);
  }
  public Component getTableCellRendererComponent(JTable table, Object value,
      boolean isSelected, boolean hasFocus, int row, int column) {
    if (isSelected) {
    } else {
      setForeground(table.getForeground());
      setBackground(table.getBackground());
    }
    setSelected((value != null && ((Boolean) value).booleanValue()));
    return this;
  }
}

public class frame extends JFrame {
  public frame() {
    super(" Table");
    DefaultTableModel dm = new DefaultTableModel() {
      public boolean isCellEditable(int row, int column) {
        if (column == 0) {
          return true;
        }
        return false;
      }
    };
    dm.setDataVector(new Object[][] {
        { "null", "String", "JLabel", "null" },
        { "false", "String", "JLabel", "null" },
        { new Boolean(true), "Boolean", "JCheckBox", "JCheckBox" },
        { new Boolean(false), "Boolean", "JCheckBox", "JCheckBox" },
        { "null", "String", "JLabel", "null" },
        { "null", "String", "JLabel", "nulll" } }, new Object[] {
        "Component", "Data", "Renderer", "Editor" });

    CheckBoxRenderer checkBoxRenderer = new CheckBoxRenderer();
    EachRowRenderer rowRenderer = new EachRowRenderer();
    rowRenderer.add(2, checkBoxRenderer);
    rowRenderer.add(3, checkBoxRenderer);
   
    JCheckBox checkBox = new JCheckBox();
    checkBox.setHorizontalAlignment(JLabel.CENTER);
    DefaultCellEditor checkBoxEditor = new DefaultCellEditor(checkBox);
    JTable table = new JTable(dm);

    EachRowEditor rowEditor = new EachRowEditor(table);
//    rowEditor.setEditorAt(0, comboBoxEditor);
//    rowEditor.setEditorAt(1, comboBoxEditor);
    rowEditor.setEditorAt(2, checkBoxEditor);
    rowEditor.setEditorAt(3, checkBoxEditor);

// end
   
    table.getColumn("Component").setCellRenderer(rowRenderer);
    table.getColumn("Component").setCellEditor(rowEditor);

    JScrollPane scroll = new JScrollPane(table);
    getContentPane().add(scroll);
    setSize(400, 160);
    setVisible(true);
  }

  public static void main(String[] args) {
    frame frame = new frame();
    frame.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
  }
}

/**
* @version 1.0 11/09/98
*/

class EachRowRenderer implements TableCellRenderer { // Importante********
  protected Hashtable renderers;

  protected TableCellRenderer renderer, defaultRenderer;

  public EachRowRenderer() {
    renderers = new Hashtable();
    defaultRenderer = new DefaultTableCellRenderer();
  }

  public void add(int row, TableCellRenderer renderer) {
    renderers.put(new Integer(row), renderer);
  }

  public Component getTableCellRendererComponent(JTable table, Object value,
      boolean isSelected, boolean hasFocus, int row, int column) {
  if(isSelected){
    System.out.println("---------------");
        System.out.println(table.getSelectedRow());
        System.out.println(value);
        System.out.println("---------------");
  }
    renderer = (TableCellRenderer) renderers.get(new Integer(row));
    if (renderer == null) {
      renderer = defaultRenderer;
    }
    return renderer.getTableCellRendererComponent(table, value, isSelected,
        hasFocus, row, column);
  }
}

class EachRowEditor implements TableCellEditor {
  protected Hashtable editors;

  protected TableCellEditor editor, defaultEditor;

  JTable table;
  public EachRowEditor(JTable table) {
    this.table = table;
    editors = new Hashtable();
    defaultEditor = new DefaultCellEditor(new JTextField());
  }
  public void setEditorAt(int row, TableCellEditor editor) {
    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 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) {
      editor = defaultEditor;
   
  }
}
}