root/BH13SPARQLBuilder/src/hozo/sparql/util/CheckableList.java @ 49

package hozo.sparql.util;

import java.awt.Component;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.swing.DefaultListModel;
import javax.swing.JCheckBox;
import javax.swing.JList;
import javax.swing.ListCellRenderer;
import javax.swing.ListModel;

public class CheckableList extends JList {
        /**
         *
         */
        private static final long serialVersionUID = -8207275088256642406L;
        private CheckBoxCellRenderer renderer;

        public CheckableList() {
                this(new DefaultListModel());
        }

        public CheckableList(ListModel model) {
                super(model);
        }


        public void updateUI() {
                setForeground(null);
                setBackground(null);
                setSelectionForeground(null);
                setSelectionBackground(null);
                if(renderer!=null) {
                        removeMouseListener(renderer);
                        removeMouseMotionListener(renderer);
                }
                super.updateUI();
                renderer = new CheckBoxCellRenderer();
                setCellRenderer(renderer);
                addMouseListener(renderer);
                addMouseMotionListener(renderer);
        }
}

class CheckBoxCellRenderer extends JCheckBox implements ListCellRenderer, MouseListener, MouseMotionListener {
        /**
         *
         */
        private static final long serialVersionUID = 5134902478737266926L;
        private int rollOverRowIndex = -1;

        @Override
        public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
                this.setOpaque(true);
                if(isSelected) {
                        this.setBackground(list.getSelectionBackground());
                        this.setForeground(list.getSelectionForeground());
                }else{
                        this.setBackground(list.getBackground());
                        this.setForeground(list.getForeground());
                }
                if(value instanceof CheckableListItem) {
                        this.setSelected(((CheckableListItem)value).selected);
                        this.getModel().setRollover(index==rollOverRowIndex);
                }
                this.setText(value.toString());
                return this;
        }

        @Override
        public void mouseExited(MouseEvent e) {
                JList l = (JList)e.getSource();
                if(rollOverRowIndex>=0) {
                        l.repaint(l.getCellBounds(rollOverRowIndex, rollOverRowIndex));
                        rollOverRowIndex = -1;
                }
        }

        @Override
        public void mouseClicked(MouseEvent e) {
                if(e.getButton()==MouseEvent.BUTTON1) {
                        JList l = (JList)e.getComponent();
                        DefaultListModel m = (DefaultListModel)l.getModel();
                        Point p = e.getPoint();
                        int index  = l.locationToIndex(p);
                        if(index>=0) {
                                CheckableListItem n = (CheckableListItem)m.get(index);
                                m.set(index, new CheckableListItem(n.text, !n.selected));
                                l.repaint(l.getCellBounds(index, index));
                        }
                }
        }

        @Override
        public void mouseMoved(MouseEvent e) {
                JList l = (JList)e.getSource();
                int index = l.locationToIndex(e.getPoint());
                if(index != rollOverRowIndex) {
                        rollOverRowIndex = index;
                        l.repaint();
                }
        }

        @Override
        public void mouseEntered(MouseEvent e) {}

        @Override
        public void mousePressed(MouseEvent e) {}

        @Override
        public void mouseReleased(MouseEvent e) {}

        @Override
        public void mouseDragged(MouseEvent e) {}
}