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/DefaultToolTip.java
String text = getText(event);
		Color fgColor = getForegroundColor(event);
		Color bgColor = getBackgroundColor(event);
		Font font = getFont(event);
		CLabel label = new CLabel(parent, getStyle(event));
		if (text != null) {
			label.setText(text);
		}
		if (image != null) {
			label.setImage(image);
		}
		if (fgColor != null) {
			label.setForeground(fgColor);
		}
		if (bgColor != null) {
			label.setBackground(bgColor);
		}
		if (bgImage != null) {
			label.setBackgroundImage(image);
		}
		if (font != null) {
			label.setFont(font);
		}
		return label;
	}
	/**
	 * The style used to create the {@link CLabel} in the default implementation
	 * 
	 * @param event
	 *            the event triggered the popup of the tooltip