Bug 174844 [JFace] JFace ToolTip class should support manual activation
I have been using the new JFace ToolTip class for showing custom-draw tool tips for my tree items and works very nicely for that. Now I have another context that I need to use tool tips in. In this context, the tool tips need to be activated in response to an event other than mouse movement. To be specific, I want to popup a tool tip when user attempts to uncheck a tree item that shouldn't be unchecked. After the tool tip is displayed, I want standard tooltip behavior (times out, hides on mouse movement, etc.). It doesn't look like I can do that using the ToolTip class. Perhaps a base class can be pulled out from the ToolTip class. The base class would expose a protected show method and let a subclass take care of activation. The existing ToolTip class can then add activation based on mouse movement + delay. Other subclasses can then be made that implement alternative activation methods.
bundles/org.eclipse.jface/src/org/eclipse/jface/window/ToolTip.java
/**
	 * Return whther the tooltip respects bounds of the monitor.
	 * 
	 * @return <code>true</code> if tooltip respects the bounds of the monitor
	 */
	public boolean isRespectMonitorBounds() {
		return respectMonitorBounds;
	}
	/**
	 * Set to <code>false</code> if monitor bounds should not be respected or
	 * to <code>true</code> if the tooltip is should repositioned to not
	 * overlap the monitors bounds. The monitor the tooltip belongs to is the
	 * same is control's monitor the tooltip is shown for.
	 * <p>
	 * Default is <code>true</code>
	 * </p>
	 * 
	 * @param respectMonitorBounds
	 */
	public void setRespectMonitorBounds(boolean respectMonitorBounds) {
		this.respectMonitorBounds = respectMonitorBounds;
	}
	/**
	 * Should the tooltip displayed because of the given event.
	 * <p>
	 * <b>Subclasses may overwrite this to get custom behaviour</b>
	 * </p>
	 * 
	 * @param event
	 *            the event