By Mr. Brian J. Keller
A pragmatic advisor to X Window Programming is a easy advisor that takes readers step-by-step via constructing purposes utilizing X-Windows™. The e-book covers the Xt Intrinsics element of the X-Window approach intimately and discusses the MIT Athena and OSF/Motif Widget units which are utilized in the various examples. themes coated contain C programming basics, textual content dealing with utilizing X, fonts, occasion dealing with in Xt, extending the Widget units (building on box Editor Widget), designing and developing an software, construction menus, printing aid, OSF/Motif (including the window arranger) and interclient conversation. 3 vast appendices are incorporated: Widgets, Classing, and Exported services; fast Xt Reference advisor (X11R4); and quickly consultant to OSF/Motif Widgets. Any purposes fashion designer attracted to constructing functions with Xt will locate this ebook a helpful and enlightening source.
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Extra info for A Practical Guide To X Window Programming: Developing Applications with the XT Intrinsics and OSF/Motif
Since the Intrinsics has internal converters, you need not be too concerned with doing this. One useful routine to be aware of, however, is: XAllocNamedColor(dpy,cmap,name, &color, &exact); This routine returns an XColor type that is suitable for using with the resource setting needs of applications (see Chapter 5). Whenever you need a color for painting, you must first allocate it. In Xt programming, however, the toolkit and widgets tend to hide these details and do most of the work for you. The next chapter provides a client that demonstrates these areas, as well as the others addressed in this book.
Refer to the MIT documentation or any of the published works on Xlib if you need a more detailed discussion in this area. rinsics and OSF/Motif:Basic X Graphics: Text, Fonts, Bitmaps, and Colors A Practical Guide to X Window Programming: Developing Applications with the XT Intrinsics and OSF/Motif by Brian J. 5. 1. Font Metrics Figure 4-1 displays the characteristics of a font. The two structures that are most important for fonts are XCharStruct and XFontStruct. The XFontStruct contains several members.
From the server’s point of view, the demand on memory is decreased, since there is no window so the server need not store any information that it does for windowed things. These two arguments are the reasons that these new abstractions were created. In the Motif widget set the following gadget classes are defined: XmLabel-Gadget, XmSeparatorGadget, XmArrowButtonGadget, XmPushButtonGadget, XmToggleButtonGadget, and XmCascadeButtonGadget. ) These are fairly simple, and are often used. They are the kind of components that fall into the realm of “probably good uses” for a windowless object.
A Practical Guide To X Window Programming: Developing Applications with the XT Intrinsics and OSF/Motif by Mr. Brian J. Keller