By Keith D. Gregory
About this booklet This ebook is a close advent to programming with the OSF /MotifI'M graphical consumer interface. it really is an creation in that it doesn't require the reader to have adventure programming within the X Window atmosphere. it truly is special in that it teaches you the way to exploit the interface parts supplied via Motif in a fancy software. even though it features a good deal of reference fabric, it isn't intended as an authoritative reference - that's the activity of the OSF/Motif Programmer's Reference, which makes use of over 900 pages within the technique. as a substitute, this ebook presents its reference fabric in a realistic, "how to" demeanour and permits the reader to take advantage of the Programmer's Reference successfully. the objective reader is an skilled C programmer and person of the X Window method below the UNIX working process. 'the reader can be acquainted with the instruments supplied by means of UNIX for the compilation and checking out of courses; whereas this booklet does study the method in which a Motif application is compiled, it doesn't clarify that technique. It additionally assumes that the reader is aware "x" phrases resembling 'pointer' and 'display'.
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The family field specifies the font family; it is one field that is never wildcarded. As of Release 3, supported families were charter, courier, helvetica, new centu ry schoolbook, symbo 1, and times. Release 4 added 1uci da, 1uci da bri ght, and 1 uci da typewri ter, but the list is subject to change, depending on your vendor. Your server may include families not shown here, or it may not contain all of those shown (although the list given is fairly representative). The weight field specifies whether the font should be boldfaced or not.
LabelString : 50 100 Hello, World! 2 contained a label using the default "fixed" font. 3. which uses l4pt Times Roman. This change was effected via the label's f 0 n tL i s t resource. 3. "Hello. World" using a different font Hello) World! Fonts Then and Now One of the advances of XII Release 3 was the addition of font families. In Release 2 and before. fonts had simple names like vg-25 or sans12. The fonts you had depended on the server you were using: some simply used the MIT fonts. some used a subset.
Wrtting A Motif Program 31 its parent is realized. This means that you could realize appshell immediately after creating it, and all of its descendents would be realized as they are managed. 6 Tfie drawback to this approach is lower efficiency: realizing all widgets in one step results in less client-server communication than realizing each widget as it is managed. The Event Loop This is the stage where a program spends most of its time. 5, is typically the last statement in a program's rna in function.