By Mr. Brian J. Keller
A pragmatic consultant to X Window Programming is a simple advisor that takes readers step-by-step via constructing functions utilizing X-Windows™. The booklet covers the Xt Intrinsics component to the X-Window method intimately and discusses the MIT Athena and OSF/Motif Widget units which are utilized in the various examples. themes lined 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 program, construction menus, printing aid, OSF/Motif (including the window arranger) and interclient verbal exchange. 3 broad appendices are integrated: Widgets, Classing, and Exported features; speedy Xt Reference consultant (X11R4); and quickly advisor to OSF/Motif Widgets. Any purposes dressmaker attracted to constructing purposes with Xt will locate this e-book a worthy and enlightening source.
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Extra resources for A Practical Guide To X Window Programming: Developing Applications with the XT Intrinsics and OSF/Motif
The mechanism we are talking about here is termed event driven and is a “don’t call me, I’ll call you” style of programming. Namely, you tell the server what you care about, and it will call you back when that thing you care about happens. In X, the clients tend to wait until the events they care about occur, then do something about them, then wait again. You will see this more when you start coding some examples. 4. Object-Oriented Programming Xt is based on the notion of object-oriented programming (OOP).
Intrinsics and OSF/Motif:Xt Basics: An Introduction to Xt-based Widgets A Practical Guide to X Window Programming: Developing Applications with the XT Intrinsics and OSF/Motif by Brian J. 1. The Class Part of a Widget The class (ClassPart) is the thing that binds the mechanism together. It allows for inheritance of superclass methods and data via a pointer to the superclass’s class record. Through this pointer, new widgets may use the superclass’s code as if it were their own. This notion is quite powerful.
With this address you can peer into the actual locations to get and update the information stored there. Since a structure is nothing more than an organization of members in a contiguous block, if you have a pointer to a structure and the structure’s definition, you can access each member. This is exactly what happens in the inheritance mechanism. The source of the Intrinsics and the well-defined approach insure that things work. All widgets have at least the members in the ClassPart. If additional class information is required, the widget may add new fields by defining a “newWidgetClassPart” and chaining it to the end of the CoreClassPart (this is discussed in greater detail in Chapter 6).
A Practical Guide To X Window Programming: Developing Applications with the XT Intrinsics and OSF/Motif by Mr. Brian J. Keller