A container that can hide its child.
GtkExpander creates a container that can hide or
display details on request. This is achieved by using a small triangle
(similar to the one used in GtkTreeView) to control
whether the details are shown or not. If the triangle is pointing to the
right, details are hidden. On clicking the object, the triangle points
downward which indicates that the details are now visible.
You can use GtkExpander as any other descendant of
GtkBin by first creating the child widget and then
using add() to add it to the
expander. When the expander is toggled, it automatically takes care of
showing and hiding the details.
Creates an expander object.
Creates a GtkExpander instance with a mnemonic label.
Emitted when the expander is activated.