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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"><title>Tab Stops</title><meta name="generator" content="DocBook XSL Stylesheets V1.69.1"><link rel="start" href="index.html" title="Pango Reference Manual"><link rel="up" href="pango.html" title="Basic Pango Interfaces"><link rel="prev" href="pango-Text-Attributes.html" title="Text Attributes"><link rel="next" href="PangoMarkupFormat.html" title="Text Attribute Markup"><meta name="generator" content="GTK-Doc V1.6 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="chapter" href="pango.html" title="Basic Pango Interfaces"><link rel="chapter" href="rendering.html" title="Rendering with Pango"><link rel="chapter" href="lowlevel.html" title="Low Level Functionality"><link rel="chapter" href="tools.html" title="Pango Tools"><link rel="index" href="ix01.html" title="Index"><link rel="index" href="ix02.html" title="Index of 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width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">Pango Reference Manual</th><td><a accesskey="n" href="PangoMarkupFormat.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#top_of_page" class="shortcut">Top</a>  |  <a href="#desc" class="shortcut">Description</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="pango-Tab-Stops"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><span class="refentrytitle"><a name="top_of_page"></a>Tab Stops</span></h2><p>Tab Stops — Structures for storing tab stops</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><a name="synopsis"></a><h2>Synopsis</h2><pre class="synopsis"> <a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a>;#define <a href="pango-Tab-Stops.html#PANGO-TYPE-TAB-ARRAY:CAPS">PANGO_TYPE_TAB_ARRAY</a>enum <a href="pango-Tab-Stops.html#PangoTabAlign">PangoTabAlign</a>;#define <a href="pango-Tab-Stops.html#PANGO-TYPE-TAB-ALIGN:CAPS">PANGO_TYPE_TAB_ALIGN</a><a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a>* <a href="pango-Tab-Stops.html#pango-tab-array-new">pango_tab_array_new</a> (<ahref="../glib/glib-Basic-Types.html#gint">gint</a> initial_size, <ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> positions_in_pixels);<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a>* <a href="pango-Tab-Stops.html#pango-tab-array-new-with-positions">pango_tab_array_new_with_positions</a> (<ahref="../glib/glib-Basic-Types.html#gint">gint</a> size, <ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> positions_in_pixels, <a href="pango-Tab-Stops.html#PangoTabAlign">PangoTabAlign</a> first_alignment, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> first_position, ...);<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a>* <a href="pango-Tab-Stops.html#pango-tab-array-copy">pango_tab_array_copy</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *src);void <a href="pango-Tab-Stops.html#pango-tab-array-free">pango_tab_array_free</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *tab_array);<ahref="../glib/glib-Basic-Types.html#gint">gint</a> <a href="pango-Tab-Stops.html#pango-tab-array-get-size">pango_tab_array_get_size</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *tab_array);void <a href="pango-Tab-Stops.html#pango-tab-array-resize">pango_tab_array_resize</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *tab_array, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> new_size);void <a href="pango-Tab-Stops.html#pango-tab-array-set-tab">pango_tab_array_set_tab</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *tab_array, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> tab_index, <a href="pango-Tab-Stops.html#PangoTabAlign">PangoTabAlign</a> alignment, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> location);void <a href="pango-Tab-Stops.html#pango-tab-array-get-tab">pango_tab_array_get_tab</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *tab_array, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> tab_index, <a href="pango-Tab-Stops.html#PangoTabAlign">PangoTabAlign</a> *alignment, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> *location);void <a href="pango-Tab-Stops.html#pango-tab-array-get-tabs">pango_tab_array_get_tabs</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *tab_array, <a href="pango-Tab-Stops.html#PangoTabAlign">PangoTabAlign</a> **alignments, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> **locations);<ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> <a href="pango-Tab-Stops.html#pango-tab-array-get-positions-in-pixels">pango_tab_array_get_positions_in_pixels</a> (<a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a> *tab_array);</pre></div><div class="refsect1" lang="en"><a name="desc"></a><h2>Description</h2><p>Functions in this section are used to deal with <a href="pango-Tab-Stops.html#PangoTabArray"><span class="type">PangoTabArray</span></a> objectsthat can be used to set tab stop positions in a <a href="pango-Layout-Objects.html#PangoLayout"><span class="type">PangoLayout</span></a>.</p></div><div class="refsect1" lang="en"><a name="details"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id2832419"></a><h3><a name="PangoTabArray"></a>PangoTabArray</h3><a class="indexterm" name="id2832430"></a><pre class="programlisting">typedef struct _PangoTabArray PangoTabArray;</pre><p>A <a href="pango-Tab-Stops.html#PangoTabArray"><span class="type">PangoTabArray</span></a> struct contains an arrayof tab stops. Each tab stop has an alignment and a position.</p></div><hr><div class="refsect2" lang="en"><a name="id2832455"></a><h3><a name="PANGO-TYPE-TAB-ARRAY:CAPS"></a>PANGO_TYPE_TAB_ARRAY</h3><a class="indexterm" name="id2832468"></a><pre class="programlisting">#define PANGO_TYPE_TAB_ARRAY (pango_tab_array_get_type ())</pre><p>The <ahref="../gobject/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> type for <a href="pango-Tab-Stops.html#PangoTabArray"><span class="type">PangoTabArray</span></a>.</p></div><hr><div class="refsect2" lang="en"><a name="id2832500"></a><h3><a name="PangoTabAlign"></a>enum PangoTabAlign</h3><a class="indexterm" name="id2832513"></a><pre class="programlisting">typedef enum{ PANGO_TAB_LEFT /* These are not supported now, but may be in the * future. * * PANGO_TAB_RIGHT, * PANGO_TAB_CENTER, * PANGO_TAB_NUMERIC */} PangoTabAlign;</pre><p>A <a href="pango-Tab-Stops.html#PangoTabAlign"><span class="type">PangoTabAlign</span></a> specifies where a tab stop appears relative to the text.</p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><a name="PANGO-TAB-LEFT:CAPS"></a><code class="literal">PANGO_TAB_LEFT</code></span></td><td>the tab stop appears to the left of the text.</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2832568"></a><h3><a name="PANGO-TYPE-TAB-ALIGN:CAPS"></a>PANGO_TYPE_TAB_ALIGN</h3><a class="indexterm" name="id2832581"></a><pre class="programlisting">#define PANGO_TYPE_TAB_ALIGN (pango_tab_align_get_type())</pre><p>The <ahref="../gobject/gobject-The-Base-Object-Type.html#GObject"><span class="type">GObject</span></a> type for <a href="pango-Tab-Stops.html#PangoTabAlign"><span class="type">PangoTabAlign</span></a>.</p></div><hr><div class="refsect2" lang="en"><a name="id2832614"></a><h3><a name="pango-tab-array-new"></a>pango_tab_array_new ()</h3><a class="indexterm" name="id2832627"></a><pre class="programlisting"><a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a>* pango_tab_array_new (<ahref="../glib/glib-Basic-Types.html#gint">gint</a> initial_size, <ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> positions_in_pixels);</pre><p>Creates an array of <em class="parameter"><code>initial_size</code></em> tab stops. Tab stops are specified inpixel units if <em class="parameter"><code>positions_in_pixels</code></em> is <ahref="../glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a>, otherwise in Pangounits. All stops are initially at position 0.</p><p></p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><em class="parameter"><code>initial_size</code></em> :</span></td><td> Initial number of tab stops to allocate, can be 0</td></tr><tr><td><span class="term"><em class="parameter"><code>positions_in_pixels</code></em> :</span></td><td> whether positions are in pixel units</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> the newly allocated <a href="pango-Tab-Stops.html#PangoTabArray"><span class="type">PangoTabArray</span></a>, which should be freed with <a href="pango-Tab-Stops.html#pango-tab-array-free"><code class="function">pango_tab_array_free()</code></a>.</td></tr></tbody></table></div></div><hr><div class="refsect2" lang="en"><a name="id2832755"></a><h3><a name="pango-tab-array-new-with-positions"></a>pango_tab_array_new_with_positions ()</h3><a class="indexterm" name="id2832769"></a><pre class="programlisting"><a href="pango-Tab-Stops.html#PangoTabArray">PangoTabArray</a>* pango_tab_array_new_with_positions (<ahref="../glib/glib-Basic-Types.html#gint">gint</a> size, <ahref="../glib/glib-Basic-Types.html#gboolean">gboolean</a> positions_in_pixels, <a href="pango-Tab-Stops.html#PangoTabAlign">PangoTabAlign</a> first_alignment, <ahref="../glib/glib-Basic-Types.html#gint">gint</a> first_position, ...);</pre><p>This is a convenience function that creates a <a href="pango-Tab-Stops.html#PangoTabArray"><span class="type">PangoTabArray</span></a>and allows you to specify the alignment and position of eachtab stop. You <span class="emphasis"><em>must</em></span> provide an alignmentand position for <em class="parameter"><code>size</code></em> tab stops.</p><p></p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody><tr><td><span class="term"><em class="parameter"><code>size</code></em> :</span></td><td> number of tab stops in the array</td></tr><tr><td><span class="term"><em class="parameter"><code>positions_in_pixels</code></em> :</span></td><td> whether positions are in pixel units</td></tr><tr><td><span class="term"><em class="parameter"><code>first_alignment</code></em> :</span></td><td> alignment of first tab stop</td></tr><tr><td><span class="term"><em class="parameter"><code>first_position</code></em> :</span></td><td> position of first tab stop</td></tr><tr><td><span class="term"><em class="parameter"><code>...</code></em> :</span></td><td> additional alignment/position pairs</td></tr><tr><td><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></td><td> the newly allocated <a href="pango-Tab-Stops.html#PangoTabArray"><span class="type">PangoTabArray</span></a>, which should be freed with <a href="pango-Tab-Stops.html#pango-tab-array-free"><code class="function">pango_tab_array_free()</code></a>.</td></tr></tbody></table></div></div>⌨️ 快捷键说明
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