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
c.removeListener(type, hideListener);
		}
		if (c instanceof Composite) {
			Control[] children = ((Composite) c).getChildren();
			for (int i = 0; i < children.length; i++) {
				toolTipHookByTypeRecursively(children[i], add, type);
			}
		}
	}
	private void toolTipHookBothRecursively(Control c) {
		c.addListener(SWT.MouseDown, hideListener);
		c.addListener(SWT.MouseExit, hideListener);
		if (c instanceof Composite) {
			Control[] children = ((Composite) c).getChildren();
			for (int i = 0; i < children.length; i++) {
				toolTipHookBothRecursively(children[i]);
			}
		}
	}
	/**
	 * Creates the content area of the the tooltip.
	 * 
	 * @param event
	 *            the event that triggered the activation of the tooltip
	 * @param parent
	 *            the parent of the content area
	 * @return the content area created
	 */
	protected abstract Composite createToolTipContentArea(Event event,
			Composite parent);