swingx-master/swingx-core/src/main/java/org/jdesktop/swingx/renderer/JRendererPanel.java
package org.jdesktop.swingx.renderer;

import java.awt.LayoutManager;
import java.awt.Rectangle;

import javax.swing.JPanel;

/**
 * An implementation of JPanel used for rendering. It overrides methods for performance reasons.
 * 
 * @author kschaefer
 */
public class JRendererPanel extends JPanel {
    public JRendererPanel() {
        super();
    }
    
    /**
     * @param layout
     */
    public JRendererPanel(LayoutManager layout) {
        super(layout);
    }

    /**
     * {@inheritDoc} <p>
     * 
     * Overridden to not automatically de/register itself from/to the ToolTipManager.
     * As rendering component it is not considered to be active in any way, so the
     * manager must not listen. 
     */
    @Override
    public void setToolTipText(String text) {
        putClientProperty(TOOL_TIP_TEXT_KEY, text);
    }

    /**
     * Overridden for performance reasons.
     * See the <a href="#override">Implementation Note</a> 
     * for more information.
     */
    @Override
    public void revalidate() {}

    /**
     * Overridden for performance reasons.
     * See the <a href="#override">Implementation Note</a> 
     * for more information.
     */
    @Override
    public void repaint(long tm, int x, int y, int width, int height) {}

    /**
     * Overridden for performance reasons.
     * See the <a href="#override">Implementation Note</a> 
     * for more information.
     */
    @Override
    public void repaint(Rectangle r) { }

    /**
     * Overridden for performance reasons.
     * See the <a href="#override">Implementation Note</a> 
     * for more information.
     *
     * @since 1.5
     */
    @Override
    public void repaint() {
    }

    /**
     * Overridden for performance reasons.
     * See the <a href="#override">Implementation Note</a> 
     * for more information.
     */
    @Override
    protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) { }

    /**
     * Overridden for performance reasons.
     * See the <a href="#override">Implementation Note</a> 
     * for more information.
     */
    @Override
    public void firePropertyChange(String propertyName, boolean oldValue, boolean newValue) { }
}