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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-pangolayoutline">
<refnamediv>
<refname>pango.LayoutLine</refname>
<refpurpose>a line in a <link
linkend="class-pangolayout"><classname>pango.Layout</classname></link>
(new in PyGTK 2.8)</refpurpose>
</refnamediv>
<refsect1>
<title>Synopsis</title>
<classsynopsis language="python">
<ooclass><classname>pango.LayoutLine</classname></ooclass>
<ooclass><classname><link
linkend="class-gobjectgboxed">gobject.GBoxed</link></classname></ooclass>
<methodsynopsis language="python">
<methodname><link
linkend="method-pangolayoutline--get-extents">get_extents</link></methodname>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link
linkend="method-pangolayoutline--get-pixel-extents">get_pixel_extents</link></methodname>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link
linkend="method-pangolayoutline--index-to-x">index_to_x</link></methodname>
<methodparam><parameter role="keyword">index</parameter></methodparam>
<methodparam><parameter role="keyword">trailing</parameter></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link
linkend="method-pangolayoutline--x-to-index">x_to_index</link></methodname>
<methodparam><parameter role="keyword">x_pos</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
</refsect1>
<refsect1>
<title>Ancestry</title>
<synopsis>+-- <link linkend="class-gobjectgboxed">gobject.GBoxed</link>
+-- <link linkend="class-pangolayoutline">pango.LayoutLine</link>
</synopsis>
</refsect1>
<refsect1>
<title>Attributes</title>
<blockquote role="properties">
<informaltable pgwide="1" frame="none">
<tgroup cols="3">
<?dbhtml cellpadding="5"?>
<colspec column="1" colwidth="1in"/>
<colspec column="2" colwidth="1in"/>
<colspec column="3" colwidth="4in"/>
<tbody>
<row valign="top">
<entry>"is_paragraph_start"</entry>
<entry>Read</entry>
<entry><literal>True</literal> if this is the first line of
the paragraph</entry>
</row>
<row valign="top">
<entry>"length"</entry>
<entry>Read</entry>
<entry>the length of the line in bytes</entry>
</row>
<row valign="top">
<entry>"resolved_dir"</entry>
<entry>Read</entry>
<entry>the resolved direction of line</entry>
</row>
<row valign="top">
<entry>"runs"</entry>
<entry>Read</entry>
<entry>a list containing the runs of the line in visual
order.</entry>
</row>
<row valign="top">
<entry>"start_index"</entry>
<entry>Read</entry>
<entry>the start of the line as byte index into the
layout.</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</blockquote>
</refsect1>
<refsect1>
<title>Description</title>
<para>A <link
linkend="class-pangolayoutline"><classname>pango.LayoutLine</classname></link>
object represents one of the lines resulting from laying out a paragraph via
<link
linkend="class-pangolayout"><classname>pango.Layout</classname></link>. <link
linkend="class-pangolayoutline"><classname>pango.LayoutLine</classname></link>
objects are obtained by calling the <link
linkend="method-pangolayout--get-line"><methodname>pango.Layout.get_line</methodname>()</link>
method or the <link
linkend="method-pangolayoutiter--get-line"><methodname>pango.LayoutIter.get_line</methodname>()</link>
method. <link
linkend="class-pangolayoutline"><classname>pango.LayoutLine</classname></link>
objects are only valid until the text, attributes, or settings of the parent
<link linkend="class-pangolayout"><classname>pango.Layout</classname></link>
are modified.</para>
</refsect1>
<refsect1>
<title>Methods</title>
<refsect2 id="method-pangolayoutline--get-extents">
<title>pango.LayoutLine.get_extents</title>
<programlisting><methodsynopsis language="python">
<methodname>get_extents</methodname>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>a 2-tuple containing 4-tuples representing
the rectangles for the logical and ink extents in Pango
units.</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.8 and above.</para>
</note>
<para>The <methodname>get_extents</methodname>() method returns the
logical and ink extents rectangles of the layout line in a 2-tuple
containing two 4-tuples which represent the rectangles. See the
documentation for the <link
linkend="method-pangofont--get-glyph-extents"><methodname>pango.Font.get_glyph_extents</methodname>()</link>
method for details about the interpretation of the rectangles. The return
extents are in Pango units (1 device unit = pango.SCALE pango units).</para>
</refsect2>
<refsect2 id="method-pangolayoutline--get-pixel-extents">
<title>pango.LayoutLine.get_pixel_extents</title>
<programlisting><methodsynopsis language="python">
<methodname>get_pixel_extents</methodname>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>a 2-tuple containing 4-tuples representing
the rectangles for the logical and ink extents in device
units.</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.8 and above.</para>
</note>
<para>The <methodname>get_pixel_extents</methodname>() method returns
the logical and ink extents rectangles of the layout line in a 2-tuple
containing two 4-tuples which represent the rectangles. See the
documentation for the <link
linkend="method-pangofont--get-glyph-extents"><methodname>pango.Font.get_glyph_extents</methodname>()</link>
method for details about the interpretation of the rectangles. The return
extents are in device units (1 device unit = pango.SCALE pango
units).</para>
</refsect2>
<refsect2 id="method-pangolayoutline--index-to-x">
<title>pango.LayoutLine.index_to_x</title>
<programlisting><methodsynopsis language="python">
<methodname>index_to_x</methodname>
<methodparam><parameter
role="keyword">index</parameter></methodparam>
<methodparam><parameter
role="keyword">trailing</parameter></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><parameter role="keyword">index</parameter> :</term>
<listitem><simpara>the byte offset of a grapheme
within the layout</simpara></listitem>
</varlistentry>
<varlistentry>
<term><parameter role="keyword">trailing</parameter> :</term>
<listitem><simpara>an integer indicating the edge of the grapheme
to retrieve the position of. If 0, the trailing edge of the grapheme,
if > 0, the leading edge of the grapheme.</simpara></listitem>
</varlistentry>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the X position in Pango units</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.8 and above.</para>
</note>
<para>The <methodname>index_to_x</methodname>() method returns the X
position (in Pango units) of the grapheme at the byte offset specified by
<parameter>index</parameter> and edge specified by
<parameter>trailing</parameter>.</para>
</refsect2>
<refsect2 id="method-pangolayoutline--x-to-index">
<title>pango.LayoutLine.x_to_index</title>
<programlisting><methodsynopsis language="python">
<methodname>x_to_index</methodname>
<methodparam><parameter
role="keyword">x_pos</parameter></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><parameter role="keyword">x_pos</parameter> :</term>
<listitem><simpara>the x offset (in Pango units) from the left
edge of the line.</simpara></listitem>
</varlistentry>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>a 3-tuple containing a boolean indicating if the
<parameter>x_pos</parameter> is inside the line, the byte offset of the
grapheme and the location in the grapheme.</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.8 and above.</para>
</note>
<para>The <methodname>x_to_index</methodname>() method returns a
3-tuple containing a boolean that is <literal>True</literal> if x_pos is
inside the line, the location inside the grapheme - either zero, or the
number of characters in the grapheme. 0 represents the trailing edge of the
grapheme.</para>
</refsect2>
</refsect1>
</refentry>
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