JTree - full row select

Question

Hi,
I would like to make the JTree tree items selectable/appearing like in the eclipse "Package Explorer". A tree item should become selected when the user clicks anywhere in it's row. Additionally the background color of the full row should be the selection-background color not only the label background.
Any ideas how to do this ? I hope there is a solution for this, but I have doubts about it because of how the CellRenderer thing works.
Thanks in advance,
Christian

Answer 1

Hi
The mouse listener in that solution doesn't properly handle SHIFT/CTRL.
This should work better:
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.UIManager;
import javax.swing.plaf.basic.BasicTreeUI;
import javax.swing.tree.TreePath;
public class ExplorerTreeUI extends BasicTreeUI {
    private Color backgroundSelectionColor = null;
    private RowSelectionListener sf = new RowSelectionListener();
    protected void installDefaults() {
        super.installDefaults();
        backgroundSelectionColor = UIManager.getColor("Tree.selectionBackground");
    protected void paintRow(Graphics g, Rectangle clipBounds,
            Insets insets, Rectangle bounds, TreePath path,
            int row, boolean isExpanded,
            boolean hasBeenExpanded, boolean isLeaf) {
        // Don't paint the renderer if editing this row.
        if (editingComponent != null && editingRow == row)
            return;
        if (tree.isRowSelected(row)) {
            int h = tree.getRowHeight();
            g.setColor(backgroundSelectionColor);
            g.fillRect(clipBounds.x, h*row, clipBounds.width, h);
        super.paintRow(g, clipBounds, insets, bounds, path, row, isExpanded,
                hasBeenExpanded, isLeaf);
    protected void installListeners() {
        super.installListeners();
        tree.addMouseListener(sf);
    protected void uninstallListeners() {
        tree.removeMouseListener(sf);
        super.uninstallListeners();
    private class RowSelectionListener extends MouseAdapter {
                     * Listener for selecting the entire rows.
                     * @author Kirill Grouchnikov
        @Override
        public void mousePressed(MouseEvent e) {
            if (!tree.isEnabled())
                return;
            TreePath closestPath = tree.getClosestPathForLocation(e.getX(), e.getY());
            if (closestPath == null)
                return;
            Rectangle bounds = tree.getPathBounds(closestPath);
            // Process events outside the immediate bounds -
            // This properly handles Ctrl and Shift
            // selections on trees.
            if ((e.getY() >= bounds.y)
                    && (e.getY() < (bounds.y + bounds.height))
                    && ((e.getX() < bounds.x) || (e.getX() > (bounds.x + bounds.width)))) {
                // fix - don't select a node if the click was on the
                // expand control
                if (isLocationInExpandControl(closestPath, e.getX(), e.getY())) {
                    return;
                selectPathForEvent(closestPath, e);
}