By Mr. Brian J. Keller
A realistic advisor to X Window Programming is a easy consultant that takes readers step-by-step via constructing purposes utilizing X-Windows™. The ebook covers the Xt Intrinsics component of the X-Window process intimately and discusses the MIT Athena and OSF/Motif Widget units which are utilized in the various examples. subject matters 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, development menus, printing support, OSF/Motif (including the window arranger) and interclient verbal exchange. 3 wide appendices are integrated: Widgets, Classing, and Exported capabilities; speedy Xt Reference advisor (X11R4); and speedy consultant to OSF/Motif Widgets. Any purposes clothier attracted to constructing purposes with Xt will locate this booklet a beneficial 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 (Distributed Network Computing)
In X, the phrase “widget” identifies a user-interface abstraction. Namely, a widget is a customizable X window that contains window attributes, operations, and window state data. Essentially, a widget encompasses all those things needed to create an X window of a specific type (such as a push button or scroll bar). As you are probably aware, writing the same old code over and over again can get very tedious and quite boring. After all, we are application writers, and we should write application code.
You could view it as a deck of cards. sics and OSF/Motif:Fundamentals: A Helpful Review for Understanding Xt the bottom of the deck, you would take it and move it to the top. The card that was on the top is now obscured (probably) by the one just placed on top. If a child lies outside of its parents’ boundaries, it will not be seen. As soon as the child comes back to the parents’ boundaries, it will be viewable provided neither of the other two situations listed occurs. 3. Event-Driven Programming X is an asynchronous system.
H> The next section of the C program is for forward declarations, global variables, and any static definitions that are needed. The use of forward declarations is consistent with the ANSI standard. Global variables help pass information to subordinate functions. , look-up tables). Now you are ready for the main program. Figure 5-1 shows its structure. The steps for writing it are as follows: 1. 2. 3. 4. Initialize the toolkit (XtInitialize()/XtAppInitialize()). Create the widgets (XtCreateWidget( )/XtCreateManagedWidget()).