Top Document: Motif FAQ (Part 4 of 9) Previous Document: 87) Why does pressing RETURN in a text widget do nothing? This Next Document: 89) When I add text to a scrolling text widget, how can I get the See reader questions & answers on this topic! - Help others by sharing your knowledge [Last modified: Nov 96] Answer: The following is a conversation circa 30 Sep 1996 between Kaleb Keithley (kaleb@x.org) and Tim Behrendsen (tim@a-sis.com, tim@airshields.com>. The latter suggested this appear in the Motif FAQ. B> Can the return value from XtParseTranslationTable be saved TB> off and reused for the lifetime of the application? KK> Yes. TB> Ah! The answer. Thank you. KK> KK> XtVaSetValues(widget, KK> XmNtranslations, XtParseTranslationTable(table), NULL); TB> which implies it's a one-shot deal (otherwise, this would cause TB> a memory leak). KK> No, you can always retrieve them with Xt(Va)GetValues. TB> You can, but if you don't and use the technique to wantonly TB> create and destroy dialogs, it seems you will get a memory TB> leak. KK> That's correct. TB> In fact, what's scary is this technique is used in the Motif TB> FAQ list; I knew I saw it somewhere reasonably authoritative TB> ([approx.] Question 133; code by Dan Heller, O'Reilly and Associates). TB> He does the following: TB> XtOverrideTranslations(bboard, TB> XtParseTranslationTable("<Configure>: resize()")); TB> This has to be unquestionably broken code, if the translation TB> tables are never freed or never reused. Obviously, I can't TB> extract out the table from overridden translations. KK> You can't extract the original translations, that's correct. TB> Come to think of it; how is this handled when translations are TB> parsed in resource files? If I have lots of translation TB> overrides, do they simply burn up space that can't be reused? TB> Does it get burned up over and over as I create widgets that TB> use those translation resources? KK> Yup and yup. User Contributions:Top Document: Motif FAQ (Part 4 of 9) Previous Document: 87) Why does pressing RETURN in a text widget do nothing? This Next Document: 89) When I add text to a scrolling text widget, how can I get the Part1 - Part2 - Part3 - Part4 - Part5 - Part6 - Part7 - Part8 - Part9 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: kenton@rahul.net (Ken Lee)
Last Update March 27 2014 @ 02:11 PM
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