RosterTreeCellRenderer.java

package org.chartsy.chatsy.chat.ui;

import javax.swing.Icon;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.tree.DefaultTreeCellRenderer;

import java.awt.Color;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.Font;

public class RosterTreeCellRenderer extends DefaultTreeCellRenderer
{
	
	private Object value;
    private boolean isExpanded;

    public RosterTreeCellRenderer()
	{
    }

    public Component getTreeCellRendererComponent(JTree tree, Object value,
		boolean selected, boolean expanded, boolean leaf, int row,
		boolean hasFocus)
	{
        this.value = value;
        final Component c = super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
        isExpanded = expanded;
        setIcon(getCustomIcon());

        RosterNode node = (RosterNode)value;
        if (node.isGroup())
		{
            setFont(new Font("Dialog", Font.BOLD, 11));
            setText(node.getName() + " (" + node.getChildCount() + " online)");
            setForeground(new Color(64, 112, 196));
            setIcon(getCustomIcon());
        }

        if (node.isGroup())
            return c;

        final JPanel panel = new JPanel();
        panel.setLayout(new FlowLayout(FlowLayout.LEFT));

        final JLabel label = new JLabel();
        label.setFont(new Font("Arial", Font.PLAIN, 11));
        label.setText(node.getName());
        panel.add(label);

        final JLabel descriptionLabel = new JLabel();
        descriptionLabel.setFont(new Font("Dialog", Font.PLAIN, 11));
        descriptionLabel.setForeground(new Color(178, 181, 182));
        descriptionLabel.setText(" - I'm just chilling.");

        panel.add(descriptionLabel);

        if (selected)
            panel.setBackground(getBackgroundSelectionColor());
        else
            panel.setBackground(getBackgroundNonSelectionColor());
        return panel;
    }

    private Icon getCustomIcon()
	{
        if (value instanceof RosterNode)
		{
            RosterNode node = (RosterNode)value;
            if (isExpanded)
                return node.getOpenIcon();
            return node.getClosedIcon();
        }
        return null;
    }

    public Icon getClosedIcon()
	{
        return getCustomIcon();
    }

    public Icon getDefaultClosedIcon()
	{
        return getCustomIcon();
    }

    public Icon getDefaultLeafIcon()
	{
        return getCustomIcon();
    }

    public Icon getDefaultOpenIcon()
	{
        return getCustomIcon();
    }

    public Icon getLeafIcon()
	{
        return getCustomIcon();
    }

    public Icon getOpenIcon()
	{
        return getCustomIcon();
    }
	
}