Sets @tooltip as the contents of the tooltip for the icon at the specified position.
Use %NULL for @tooltip to remove an existing tooltip.
See also gtk_widget_set_tooltip_text() and gtk_entry_set_icon_tooltip_markup().
the icon position
the contents of the tooltip for the icon, or %NULL
2.16
See Implementation
Sets @tooltip as the contents of the tooltip for the icon at the specified position.
Use %NULL for @tooltip to remove an existing tooltip.
See also gtk_widget_set_tooltip_text() and gtk_entry_set_icon_tooltip_markup().