Set the Tooltip Delay Time for a Particular Component in Java Swing

Question

I\'m trying to set tooltips on a JEditorPane. The method which I use to determine what tooltip text to show is fairly CPU intensive - and so I would like to onl

Answer 1

FWIW, here is code that is based on the post by Noel. It takes that prior art and wraps it in a new class where the default is stored statically. Just in case anyone may benefit:

import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.*;

/**
 * Provides customizable tooltip timeouts for a {@link javax.swing.JComponent}.
 *
 * @see ToolTipManager#setDismissDelay(int).
 */
public final class CustomTooltipDelayer extends MouseAdapter
{
  private static final int defaultDismissTimeout = ToolTipManager.sharedInstance().getDismissDelay();

  private final int _delay;

  /**
   * Override the tooltip timeout for the given component in raw millis.
   *
   * @param component target
   * @param delay the timeout duration in milliseconds
   */
  public static CustomTooltipDelayer attach(JComponent component, int delay)
  {
    CustomTooltipDelayer delayer = new CustomTooltipDelayer(delay);
    component.addMouseListener( delayer );
    return delayer;
  }

  /**
   * Override the tooltip timeout for the given component as a ratio of the JVM-wide default.
   *
   * @param component target
   * @param ratio the timeout duration as a ratio of the default
   */
  public static CustomTooltipDelayer attach(JComponent component, float ratio)
  {
    return attach( component, (int)(defaultDismissTimeout * ratio) );
  }

  /** Use factory method {@link #attach(JComponent, int)} */
  private CustomTooltipDelayer(int delay)
  {
    _delay = delay;
  }

  @Override
  public void mouseEntered( MouseEvent e )
  {
    ToolTipManager.sharedInstance().setDismissDelay(_delay);
  }

  @Override
  public void mouseExited( MouseEvent e )
  {
    ToolTipManager.sharedInstance().setDismissDelay(defaultDismissTimeout);
  }
}