Download A Practical Guide To X Window Programming: Developing by Mr. Brian J. Keller PDF

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By Mr. Brian J. Keller

A pragmatic consultant to X Window Programming is a easy advisor that takes readers step-by-step via constructing purposes utilizing X-Windows™. The ebook covers the Xt Intrinsics component of the X-Window procedure intimately and discusses the MIT Athena and OSF/Motif Widget units which are utilized in a few of the examples. issues lined 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 aid, OSF/Motif (including the window arranger) and interclient verbal exchange. 3 broad appendices are incorporated: Widgets, Classing, and Exported capabilities; fast Xt Reference consultant (X11R4); and quickly consultant to OSF/Motif Widgets. Any functions dressmaker attracted to constructing functions with Xt will locate this booklet a priceless 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

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This is shown in Figure 2-2. sics and OSF/Motif:Fundamentals: A Helpful Review for Understanding Xt Figure 2-2 Parent/child/sibling. An X window can be viewed as a “roundtangle”—usually, but not quite always, a rectangle. The reason for the new name is that for most of X’s life all that programmers could get were rectangles. However, with X11R4, the folks at MIT incorporated a “shapes” extension, so windows need not be rectangular. The upper-left corner of an X window is considered to be its origin (see Figure 2-3).

Multi-Font Text Another interesting function provided by Xlib is XDrawText( ). This function draws strings of text using multiple fonts in a single operation. Its use is shown here: XDrawText(dpy, drawable, gc, x, y, items, num_items); In this example, “items” is of type XTextItem and “num_items” is the number of items. The XTextItem structure is defined as follows: typedef struct char int int Font } XTextItem; { *chars; nchars; delta; font; (The OSF/Motif Toolkit also provides a compound string notion.

This is shown in Figure 2-2. sics and OSF/Motif:Fundamentals: A Helpful Review for Understanding Xt Figure 2-2 Parent/child/sibling. An X window can be viewed as a “roundtangle”—usually, but not quite always, a rectangle. The reason for the new name is that for most of X’s life all that programmers could get were rectangles. However, with X11R4, the folks at MIT incorporated a “shapes” extension, so windows need not be rectangular. The upper-left corner of an X window is considered to be its origin (see Figure 2-3).

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