A birdcage (or bird cage) is a cage designed to house birds as pets. Antique (or antique-style) birdcages are often popular as collectors' items or as household decor but most are not suitable for housing live birds, being too small, or of unsafe materials or construction.ood quality cages designed for pet birds are more suitable. Most parrot cages are made or wrought iron and painted with a non-toxic paint referred to as powder-coating. However, the newest trend in the market is cages made of solid stainless steel.
A viewport is a 2D rectangle that defines the size of the rendering surface onto which a 3D scene is projected.
The GtkTextView widget is the. primary component of this framework. However, unlike the widgets you have seen in previous lessons, the. text view widget is part of a larger framework that is something like the model/view/controller software. architecture. In this architecture, the visual display of the data, called the view , is separate from the. manipulation and representation of the data, which is managed by a model .