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authorHasan Wan <hasan.wan@intel.com>2012-05-25 16:47:13 +0800
committerHasan Wan <hasan.wan@intel.com>2012-05-28 16:06:22 +0800
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+<?xml version="1.0" standalone="no"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
+ "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd">
+
+<refentry id="class-gioicon">
+ <refnamediv>
+ <refname>gio.Icon</refname>
+ <refpurpose>Interface for icons.</refpurpose>
+ </refnamediv>
+
+ <refsect1>
+ <title>Synopsis</title>
+
+ <classsynopsis language="python">
+ <ooclass><classname>gio.Icon</classname></ooclass>
+ <ooclass><classname><link linkend="class-gobjectginterface">gobject.GInterface</link></classname></ooclass>
+
+ <methodsynopsis language="python">
+ <methodname><link linkend="method-gioicon--equal">equal</link></methodname>
+ <methodparam><parameter role="keyword">icon2</parameter></methodparam>
+ </methodsynopsis>
+ <methodsynopsis language="python">
+ <methodname><link linkend="method-gioicon--to-string">to_string</link></methodname>
+ <methodparam></methodparam>
+ </methodsynopsis>
+
+ </classsynopsis>
+
+<programlisting>
+<emphasis role="bold">Functions</emphasis>
+
+<methodsynopsis language="python">
+ <methodname><link linkend="function-gio--icon-new-from-string">gio.icon_new_from_string</link></methodname>
+ <methodparam></methodparam>
+</methodsynopsis></programlisting>
+
+ </refsect1>
+
+ <refsect1>
+ <title>Ancestry</title>
+
+<synopsis>+-- <link linkend="class-gobjectginterface">gobject.GInterface</link>
+ +-- <link linkend="class-gioicon">gio.Icon</link>
+</synopsis>
+
+ </refsect1>
+
+ <refsect1>
+ <title>Known Derived Interfaces</title>
+ <para>
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link> is required by
+ <link linkend="class-gioloadableicon"><classname>gio.LoadableIcon</classname></link>.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Known Implementation</title>
+ <para>
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link> is implemented by
+ <link linkend="class-giothemedicon"><classname>gio.ThemedIcon</classname></link>,
+ <link linkend="class-giofileicon"><classname>gio.FileIcon</classname></link>,
+ <link linkend="class-gioemblem"><classname>gio.Emblem</classname></link>,
+ <link linkend="class-gioemblemedicon"><classname>gio.EmblemedIcon</classname></link>.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link>
+ is a very minimal interface for icons. It provides functions for checking
+ the equality of two icons, hashing of icons and serializing an icon to and from strings.
+ </para>
+ <para>
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link>
+ does not provide the actual pixmap for the icon as this is out of GIO's
+ scope, however implementations of
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link>
+ may contain the name of an icon (see
+ <link linkend="class-giothemedicon"><classname>gio.ThemedIcon</classname></link>),
+ or the path to an icon (see
+ <link linkend="class-gioloadableicon"><classname>gio.LoadableIcon</classname></link>).
+ </para>
+ <!--
+ <para>
+ To obtain a hash of a <link linkend="class-gioicon"><classname>gio.Icon</classname></link>, see
+ <methodname><link linkend="method-gioicon- -hash">gio.Icon.hash</link></methodname>().
+ </para>
+ -->
+ <para>
+ To check if two GIcons are equal, see
+ <methodname><link linkend="method-gioicon--equal">gio.Icon.equal</link></methodname>().
+ </para>
+ <para>
+ For serializing a <link linkend="class-gioicon"><classname>gio.Icon</classname></link>,
+ use <methodname><link linkend="method-gioicon- -to-string">gio.Icon.to_string</link></methodname>() and
+ <methodname><link linkend="method-gioicon- -new-from-string">gio.Icon.new_from_string</link></methodname>().
+ </para>
+ <para>
+ If your application or library provides one or more
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link>
+ implementations you need to ensure that each GType is registered
+ with the type system prior to calling
+ <methodname><link linkend="function-gioicon--new-from-string">gio.icon_new_from_string</link></methodname>().
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Methods</title>
+
+ <refsect2 id="method-gioicon--equal">
+ <title>gio.Icon.equal</title>
+
+ <programlisting><methodsynopsis language="python">
+ <methodname>equal</methodname>
+ <methodparam><parameter role="keyword">icon2</parameter></methodparam>
+ </methodsynopsis></programlisting>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>icon2</parameter>&nbsp;:</term>
+ <listitem><simpara>the second
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link>
+ </simpara></listitem>
+ </varlistentry>
+ </variablelist>
+
+ <para>
+ The <methodname>equal</methodname>() method checks if two icons are equal.
+ </para>
+ </refsect2>
+
+ <refsect2 id="method-gioicon--to-string">
+ <title>gio.Icon.to_string</title>
+
+ <programlisting><methodsynopsis language="python">
+ <methodname>to_string</methodname>
+ <methodparam></methodparam>
+ </methodsynopsis></programlisting>
+
+ <variablelist>
+ <varlistentry>
+ <term><emphasis>Returns</emphasis>&nbsp;:</term>
+ <listitem><simpara>An UTF8 string or <literal>None</literal>
+ if icon can't be serialized.
+ </simpara></listitem>
+ </varlistentry>
+ </variablelist>
+
+ <para>
+ The <methodname>to_string</methodname>() method generates a textual
+ representation of icon that can be used for serialization such as when
+ passing icon to a different process or saving it to persistent storage. Use
+ <methodname><link linkend="function-gio--icon-new-from-string">gio.icon_new_from_string</link></methodname>()
+ to get icon back from the returned string.
+ </para>
+ <para>
+ The encoding of the returned string is proprietary to GIcon except in the following two cases
+ </para>
+ <para>
+ If icon is a <link linkend="class-giofileicon"><classname>gio.FileIcon</classname></link>,
+ the returned string is a native path (such as /path/to/my icon.png) without escaping
+ if the <link linkend="class-giofile"><classname>gio.File</classname></link>
+ for icon is a native file. If the file is not native, the returned string is the result of
+ <methodname><link linkend="method-giofile--get-uri">gio.File.get_uri</link></methodname>()
+ (such as sftp://path/to/my%20icon.png).
+ </para>
+ <para>
+ If icon is a <link linkend="class-giothemedicon"><classname>gio.ThemedIcon</classname></link>
+ with exactly one name, the encoding is simply the name (such as network-server).
+ </para>
+ </refsect2>
+ </refsect1>
+
+ <refsect1>
+ <title>Functions</title>
+
+ <refsect2 id="function-gio--icon-new-from-string">
+ <title>gio.icon_new_from_string</title>
+
+ <programlisting><methodsynopsis language="python">
+ <methodname>icon_new_from_string</methodname>
+ <methodparam><parameter role="keyword">str</parameter></methodparam>
+ </methodsynopsis></programlisting>
+
+ <variablelist>
+ <varlistentry>
+ <term><parameter>str</parameter>&nbsp;:</term>
+ <listitem><simpara>A string obtained via
+ <methodname><link linkend="method-gioicon--to-string">gio.Icon.to_string</link></methodname>().
+ </simpara></listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><emphasis>Returns</emphasis>&nbsp;:</term>
+ <listitem><simpara>An object implementing the
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link>
+ interface or <literal>None</literal> if error is set.
+ </simpara></listitem>
+ </varlistentry>
+ </variablelist>
+
+ <para>
+ The <methodname>icon_new_from_string</methodname>() function generate a
+ <link linkend="class-gioicon"><classname>gio.Icon</classname></link>
+ instance from str. This function can fail if str is not valid - see
+ <methodname><link linkend="method-gioicon--to-string">gio.Icon.to_string</link></methodname>()
+ for discussion.
+ </para>
+ <para>
+ If your application or library provides one or more GIcon implementations you need
+ to ensure that each GType is registered with the type system prior to calling
+ <methodname><link linkend="function-gio--icon-new-from-string">gio.icon_new_from_string</link></methodname>().
+ </para>
+ </refsect2>
+ </refsect1>
+</refentry>