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Volume 7A: XView Programming Manual
book

Volume 7A: XView Programming Manual

by Dan Heller
October 1994
Intermediate to advanced content levelIntermediate to advanced
770 pages
22h 58m
English
O'Reilly Media, Inc.
Content preview from Volume 7A: XView Programming Manual
Mouse Keyboard
Display
cmdtool(CONSOLE)-/bin/csh
total 49
1 sbin/ 3 etc/ 1 preserve/
1 5include 1 hosts/ 1 pub/
1 5lib/ 2 include/ 1 sccs
1 Xlir3@ 1 kvm 1 share/
1 adm@ 4 lib/ 1 spool@
6 bin/ 1 local/ 1 sqps
1 boot/ 8 lost+found/ 1 stand/
1 demo/ 1 man@ 1 sys@
1 diag/ 1 mdc/ 1 tmp@
1 dict 1 old/ 2 ucb/
colorful-96%
Workspace
Utilities
Properties...
Exit...
colorful:/usr
colorful-19%
Network
Application
XView Toolkit
Xlib
Device
X11 Server Window Manager
Figure 1-4. The software architecture of X applications
Note that using a toolkit does not preclude calling Xlib directly to accomplish certain tasks
such as drawing. In XView, graphics rendering is done most efficiently by using Xlib draw-
ing routines, for instance.
1.3 Extensions to X
Another thing to know about X is that it is extensible. The code includes a defined mecha-
nism for incorporating extensions, so that vendors are not forced to modify the existing sys-
tem in incompatible ways when adding features. An extension requires an additional piece
of software on the server side and an additional library at the same level as Xlib on the client
side. After an initial query to see whether the server portion of the extension software is
installed, these extensions are used just like Xlib routines and perform at the same level.
Among the extensions currently being developed are support for 2D spline curves, for 3D
graphics, and for Display PostScript
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Publisher Resources

ISBN: 9780937175873