82 lines
3.6 KiB
HTML
82 lines
3.6 KiB
HTML
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<!DOCTYPE html>
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<html>
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<!-- Created by GNU Texinfo 7.1, https://www.gnu.org/software/texinfo/ -->
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<!-- This manual documents Guile version 3.0.10.
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Copyright (C) 1996-1997, 2000-2005, 2009-2023 Free Software Foundation,
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Inc.
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Copyright (C) 2021 Maxime Devos
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Copyright (C) 2024 Tomas Volf
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3 or
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any later version published by the Free Software Foundation; with no
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Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A
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copy of the license is included in the section entitled "GNU Free
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Documentation License." -->
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<title>Dia Hook (Guile Reference Manual)</title>
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<meta name="description" content="Dia Hook (Guile Reference Manual)">
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<link href="index.html" rel="start" title="Top">
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<link href="Concept-Index.html" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Extending-Dia.html" rel="up" title="Extending Dia">
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<link href="Dia-Structure.html" rel="next" title="Dia Structure">
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<link href="Dia-Primitives.html" rel="prev" title="Dia Primitives">
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</head>
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<body lang="en">
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<div class="subsubsection-level-extent" id="Dia-Hook">
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<div class="nav-panel">
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<p>
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Next: <a href="Dia-Structure.html" accesskey="n" rel="next">Top-level Structure of Guile-enabled Dia</a>, Previous: <a href="Dia-Primitives.html" accesskey="p" rel="prev">Writing Guile Primitives for Dia</a>, Up: <a href="Extending-Dia.html" accesskey="u" rel="up">How One Might Extend Dia Using Guile</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<h4 class="subsubsection" id="Providing-a-Hook-for-the-Evaluation-of-Scheme-Code"><span>5.7.1.5 Providing a Hook for the Evaluation of Scheme Code<a class="copiable-link" href="#Providing-a-Hook-for-the-Evaluation-of-Scheme-Code"> ¶</a></span></h4>
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<p>To make the Guile integration useful, you have to design some kind of
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hook into your application that application users can use to cause their
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Scheme code to be evaluated.
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</p>
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<p>Technically, this is straightforward; you just have to decide on a
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mechanism that is appropriate for your application. Think of Emacs, for
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example: when you type <kbd class="kbd"><kbd class="key">ESC</kbd> :</kbd>, you get a prompt where you can
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type in any Elisp code, which Emacs will then evaluate. Or, again like
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Emacs, you could provide a mechanism (such as an init file) to allow
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Scheme code to be associated with a particular key sequence, and
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evaluate the code when that key sequence is entered.
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</p>
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<p>In either case, once you have the Scheme code that you want to evaluate,
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as a null terminated string, you can tell Guile to evaluate it by
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calling the <code class="code">scm_c_eval_string</code> function.
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</p>
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</div>
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</body>
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</html>
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