public class Tooltip : Object
When you need a tooltip with a little more fancy contents, like adding an image, or you want the tooltip to have different contents per TreeView row or cell, you will have to do a little more work:
- Set the has_tooltip property to true, this will make GTK monitor the widget for motion and related events which are needed to determine when and where to show a tooltip.
- Connect to the query_tooltip signal. This signal will be emitted when a
tooltip is supposed to be shown. One of the arguments passed to the signal handler is a GtkTooltip object. This is the object that we are
about to display as a tooltip, and can be manipulated in your callback using functions like
set_icon. There are functions for setting the tooltip’s markup, setting an
image from a named icon, or even putting in a custom widget.
Return true from your query-tooltip handler. This causes the tooltip to be show. If you return false, it will not be shown.