gtk:widget-child-visible (widget)

widget -- a gtk:widget object
visible -- if true, widget should be mapped along with its parent

Gets or sets whether the widget should be mapped along with its parent. The child visibility can be set for the widget before it is added to a container with the gtk:widget-set-parent function, to avoid mapping children unnecessary before immediately unmapping them. However it will be reset to its default state of true when the widget is removed from a container.

Note that changing the child visibility of a widget does not queue a resize on the widget. Most of the time, the size of a widget is computed from all visible children, whether or not they are mapped. If this is not the case, the container can queue a resize itself.

This function is only useful for widget implementations and should never be called by an application.