The QToolTip class provides tool tips (sometimes called balloon help) for any widget or rectangular part of a widget. ... Adds a tool tip to an entire widget, and to tool tip group group. text is the text shown in the tool tip and longText is the text emitted from group. ... Adds a tool tip to widget. text is the text to be shown in the tool tip. ... Adds a tool tip to widget, and to tool tip group group. text is the text shown in the tool tip and longText is the text emitted from group. ...