CheckBox List : JCheckBox « Swing « Java Tutorial






/*
 * Copyright (C) 2005 - 2007 JasperSoft Corporation.  All rights reserved. 
 * http://www.jaspersoft.com.
 *
 * Unless you have purchased a commercial license agreement from JasperSoft,
 * the following license terms apply:
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed WITHOUT ANY WARRANTY; and without the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, see http://www.gnu.org/licenses/gpl.txt
 * or write to:
 *
 * Free Software Foundation, Inc.,
 * 59 Temple Place - Suite 330,
 * Boston, MA  USA  02111-1307
 *
 *
 *
 *
 * CheckBoxList.java
 * 
 * Created on October 5, 2006, 9:53 AM
 *
 */

/**
 *
 * @author gtoffoli
 */
import java.awt.Color;
import java.awt.Component;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.DefaultListCellRenderer;
import javax.swing.DefaultListModel;
import javax.swing.JCheckBox;
import javax.swing.JList;
import javax.swing.ListSelectionModel;
import javax.swing.UIManager;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;

public class CheckBoxList extends JList {

  public CheckBoxList() {
    super();

    setModel(new DefaultListModel());
    setCellRenderer(new CheckboxCellRenderer());

    addMouseListener(new MouseAdapter() {
      @Override
      public void mousePressed(MouseEvent e) {
        int index = locationToIndex(e.getPoint());

        if (index != -1) {
          Object obj = getModel().getElementAt(index);
          if (obj instanceof JCheckBox) {
            JCheckBox checkbox = (JCheckBox) obj;

            checkbox.setSelected(!checkbox.isSelected());
            repaint();
          }
        }
      }
    }

    );

    setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  }

  @SuppressWarnings("unchecked")
  public int[] getCheckedIdexes() {
    java.util.List list = new java.util.ArrayList();
    DefaultListModel dlm = (DefaultListModel) getModel();
    for (int i = 0; i < dlm.size(); ++i) {
      Object obj = getModel().getElementAt(i);
      if (obj instanceof JCheckBox) {
        JCheckBox checkbox = (JCheckBox) obj;
        if (checkbox.isSelected()) {
          list.add(new Integer(i));
        }
      }
    }

    int[] indexes = new int[list.size()];

    for (int i = 0; i < list.size(); ++i) {
      indexes[i] = ((Integer) list.get(i)).intValue();
    }

    return indexes;
  }

  @SuppressWarnings("unchecked")
  public java.util.List getCheckedItems() {
    java.util.List list = new java.util.ArrayList();
    DefaultListModel dlm = (DefaultListModel) getModel();
    for (int i = 0; i < dlm.size(); ++i) {
      Object obj = getModel().getElementAt(i);
      if (obj instanceof JCheckBox) {
        JCheckBox checkbox = (JCheckBox) obj;
        if (checkbox.isSelected()) {
          list.add(checkbox);
        }
      }
    }
    return list;
  }
}

/*
 * Copyright (C) 2005 - 2007 JasperSoft Corporation. All rights reserved.
 * http://www.jaspersoft.com.
 * 
 * Unless you have purchased a commercial license agreement from JasperSoft, the
 * following license terms apply:
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 2 as published by the
 * Free Software Foundation.
 * 
 * This program is distributed WITHOUT ANY WARRANTY; and without the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, see http://www.gnu.org/licenses/gpl.txt or write to:
 * 
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA USA
 * 02111-1307
 * 
 * 
 * 
 * 
 * CheckboxCellRenderer.java
 * 
 * Created on October 5, 2006, 10:03 AM
 * 
 */

/**
 * 
 * @author gtoffoli
 */
class CheckboxCellRenderer extends DefaultListCellRenderer {
  protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1);

  public Component getListCellRendererComponent(JList list, Object value, int index,
      boolean isSelected, boolean cellHasFocus) {
    if (value instanceof CheckBoxListEntry) {
      CheckBoxListEntry checkbox = (CheckBoxListEntry) value;
      checkbox.setBackground(isSelected ? list.getSelectionBackground() : list.getBackground());
      if (checkbox.isRed()) {
        checkbox.setForeground(Color.red);
      } else {
        checkbox.setForeground(isSelected ? list.getSelectionForeground() : list.getForeground());
      }
      checkbox.setEnabled(isEnabled());
      checkbox.setFont(getFont());
      checkbox.setFocusPainted(false);
      checkbox.setBorderPainted(true);
      checkbox.setBorder(isSelected ? UIManager.getBorder("List.focusCellHighlightBorder")
          : noFocusBorder);

      return checkbox;
    } else {
      return super.getListCellRendererComponent(list, value.getClass().getName(), index,
          isSelected, cellHasFocus);
    }
  }
}

/*
 * Copyright (C) 2005 - 2007 JasperSoft Corporation. All rights reserved.
 * http://www.jaspersoft.com.
 * 
 * Unless you have purchased a commercial license agreement from JasperSoft, the
 * following license terms apply:
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License version 2 as published by the
 * Free Software Foundation.
 * 
 * This program is distributed WITHOUT ANY WARRANTY; and without the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, see http://www.gnu.org/licenses/gpl.txt or write to:
 * 
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA USA
 * 02111-1307
 * 
 * 
 * 
 * 
 * CheckBoxListEntry.java
 * 
 * Created on October 5, 2006, 10:19 AM
 * 
 */

/**
 * 
 * @author gtoffoli
 */
class CheckBoxListEntry extends JCheckBox {

  private Object value = null;

  private boolean red = false;

  public CheckBoxListEntry(Object itemValue, boolean selected) {
    super(itemValue == null ? "" : "" + itemValue, selected);
    setValue(itemValue);
  }

  public boolean isSelected() {
    return super.isSelected();
  }

  public void setSelected(boolean selected) {
    super.setSelected(selected);
  }

  public Object getValue() {
    return value;
  }

  public void setValue(Object value) {
    this.value = value;
  }

  public boolean isRed() {
    return red;
  }

  public void setRed(boolean red) {
    this.red = red;
  }

}








14.11.JCheckBox
14.11.1.Creating JCheckBox Components
14.11.2.Using JCheckBoxUsing JCheckBox
14.11.3.JCheckBox.setMnemonic
14.11.4.Listening to JCheckBox Events with an ActionListenerListening to JCheckBox Events with an ActionListener
14.11.5.Listening to JCheckBox Events with an ItemListenerListening to JCheckBox Events with an ItemListener
14.11.6.Listening to JCheckBox Events with a ChangeListener: listen to armed, pressed, selected, or released stateListening to JCheckBox Events with a ChangeListener: listen to armed, pressed, selected, or released state
14.11.7.Check if a JCheckBox is selected in its item change listener
14.11.8.Event firing sequence: ActionListener, ItemListener and ChangeListenerEvent firing sequence: ActionListener, ItemListener and ChangeListener
14.11.9.Adding an Icon to the Label of a JCheckBox Component
14.11.10.Getting and Setting the State of a JCheckbox Component
14.11.11.Display an icon when the cursor is moved over the checkbox. This is called the rollover icon.
14.11.12.Customizing JCheckBox Check Mark IconCustomizing JCheckBox Check Mark Icon
14.11.13.Customizing JCheckBox Look and Feel
14.11.14.CheckBox List