By Mr. Brian J. Keller
A realistic 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 component of the X-Window method intimately and discusses the MIT Athena and OSF/Motif Widget units which are utilized in a number of the examples. issues coated comprise 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 support, OSF/Motif (including the window arranger) and interclient conversation. 3 large appendices are integrated: Widgets, Classing, and Exported capabilities; speedy Xt Reference advisor (X11R4); and quickly advisor to OSF/Motif Widgets. Any functions fashion designer attracted to constructing functions with Xt will locate this booklet a precious 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
In the OOP world, there exist objects which are nothing more than data and ways of handling the data (called methods). These things called objects are self-contained. That means that if I had an editor object, it would contain all of the data needed to pull all of the editing, as well as all of the processing needed to deal with the data. sics and OSF/Motif:Fundamentals: A Helpful Review for Understanding Xt Figure 2-5 Sample Xt client. Objects are arranged in classes (types of objects). Classing allows objects to inherit things from superclasses.
Wildcards in Font Names The new naming convention can be quite tedious, not to mention a real pain. Once again, though, the MIT folks did not forget you. rinsics and OSF/Motif:Basic X Graphics: Text, Fonts, Bitmaps, and Colors information, you can insert wildcards to allow for matching. ) hardcode it. ” If you wanted the first 14 point latin-1 font available, you would use *-140-*-iso8859-1. 4. Loading Fonts Most of the Xt Intrinsics hide the details of many of the graphic elements, either through the resource management or via the built-in converters (see Chapter 6).
For instance, the Athena Label widget’s class is defined as labelWidgetClass and the Motif Form widget’s class is xmFormWidgetClass. The parent is the “container” that this widget will belong to. The argument list is a list of resources, and the values desired for those resources. Lastly, the number of arguments tells the creation mechanism how many arguments in the list to worry about. Arguments can be set for widgets by either resource specifications in the resource database (discussed in the next section) or through argument passing.