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3. GRAPHICAL COMPONENTS
Windows and panes
The display layouts are hierarchically organised. The layouts are built using
components called windows and panes.
screen Screen is the topmost display component,
corresponding to the entire pixel area of the
physical screen.
window Window is a component that has no parent except
the screen. Typically a window fills up the entire
screen, but there are also smaller (temporary)
windows that take up only a part of the screen,
leaving other parts of the screen visible around
themselves.
Each application runs in a window of it's own.
Applications can also use other temporary windows.
pane Pane means a sub-component of a window (sub-
window).
A window may contain many panes, and each pane
may contain further sub-panes and so on. A bottom
level component that cannot have a sub-
component, can be called an element.
Status pane
Main pane
Control pane
Figure 3-1. Panes
application window An application window is a principal window filling
up the entire screen. It is usually not used directly
for display, but just as a parent for the various
panes.
A typical application window is divided into the
following panes:
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