widget
should be mapped along with its when its parent
is mapped and widget
has been shown with gtkWidgetShow
. gtkWidgetSetChildVisible(object, is.visible)
object
is.visible
TRUE
, widget
should be mapped along with its parent.gtkWidgetSetParent
, 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 container implementations and
never should be called by an application.