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
this.control = control;
		this.control.addDisposeListener(new DisposeListener() {
			public void widgetDisposed(DisposeEvent e) {
				deactivate();
			}
		});
		this.listener = new ToolTipOwnerControlListener();
		activate();
	}
	/**
	 * Restore arbitary data under the given key
	 * 
	 * @param key
	 *            the key
	 * @param value
	 *            the value
	 */
	public void setData(String key, Object value) {
		if (data == null) {
			data = new HashMap();
		}
		data.put(key, value);
	}
	/**
	 * Get the data restored under the key
	 * 
	 * @param key
	 *            the key
	 * @return data or <code>null</code> if no entry is restored under the key
	 */