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<?xml version="1.0" encoding="UTF-8"?>
<!--
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) INRIA - 2008 - Jean-Baptiste Silvy
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
-->
<refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:svg="http://www.w3.org/2000/svg" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook" version="5.0-subset Scilab" xml:lang="fr" xml:id="is_handle_valid">
<info>
<pubdate>$LastChangedDate: 2008-03-26 09:50:39 +0100 (mer., 26 mars 2008) $</pubdate>
</info>
<refnamediv>
<refname>is_handle_valid</refname>
<refpurpose>Vérifie si un ensemble de handles graphiques est valide.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Séquence d'appel</title>
<synopsis>isValid = is_handle_valid(h)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Paramètres</title>
<variablelist>
<varlistentry>
<term>h</term>
<listitem>
<para>Matrice de handles graphiques</para>
</listitem>
</varlistentry>
<varlistentry>
<term>isValid</term>
<listitem>
<para>Matrice de booléens de même taille que <literal>h</literal></para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para> La function <literal>is_handle_valid</literal> vérifie si un ensemble de handles graphiques est valide.
Un handle considéré comme valide s'il n'a pas été détruit.
Le résultat est la matrice de booléens <literal>isValid</literal>.
<literal>isValid(i,j)</literal> est vrai si <literal>h(i,j)</literal> est valide
et faux sinon.
</para>
</refsection>
<refsection>
<title>Exemples</title>
<programlisting role="example"><![CDATA[
// Vérification de la validité des objets courants
is_handle_valid([gcf(), gca(), gce()])
// création de 11 polylines
plot([0:10; 0:10; 0:10], [0:10; 0:0.5:5; 0:2:20]);
// Vérification de la validité des polylines
axes = gca();
polylines = axes.children(1).children
is_handle_valid(polylines)
// destruction de quelques polylines
delete(polylines(3:7));
// Affichage de la validité
is_handle_valid(polylines)
]]></programlisting>
</refsection>
<refsection>
<title>Voir Aussi</title>
<simplelist type="inline">
<member>
<link linkend="delete">delete</link>
</member>
<member>
<link linkend="graphics_entities">graphics_entities</link>
</member>
</simplelist>
</refsection>
<refsection>
<title>Auteurs</title>
<para>Jean-Baptiste Silvy INRIA</para>
</refsection>
</refentry>
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