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<!-- Generated by Doxygen 1.3.8 -->
<h1>GFC::Pango::LayoutLine Class Reference</h1>A PangoLayoutLine C++ wrapper class.
<a href="#_details">More...</a>
<p>
<code>#include <<a class="el" href="pango_2layout_8hh-source.html">gfc/pango/layout.hh</a>></code>
<p>
<p>Inheritance diagram for GFC::Pango::LayoutLine:
<p><center><img src="classGFC_1_1Pango_1_1LayoutLine.png" usemap="#GFC::Pango::LayoutLine_map" border="0" alt=""></center>
<map name="GFC::Pango::LayoutLine_map">
<area doxygen="gfccore.tag:" href="classGFC_1_1Object.html" alt="GFC::Object" shape="rect" coords="0,56,148,80">
<area doxygen="gfccore.tag:" href="classGFC_1_1Trackable.html" alt="GFC::Trackable" shape="rect" coords="0,0,148,24">
</map>
<a href="classGFC_1_1Pango_1_1LayoutLine-members.html">List of all members.</a><h2>Public Member Functions</h2>
<tr><td colspan="2"><div class="groupHeader">Constructors</div></td></tr>
<ul>
<li><a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1188_0">LayoutLine</a> (PangoLayoutLine *layout_line)
<dl class="el"><dd class="mdescRight">Construct a new <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> from an existing PangoLayoutLine. <a href="#z1188_0"></a><br></dl><li><a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1188_1">LayoutLine</a> (const <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> &src)
<dl class="el"><dd class="mdescRight">Copy constructor. <a href="#z1188_1"></a><br></dl><li><a class="anchor" name="z1188_2" doxytag="GFC::Pango::LayoutLine::~LayoutLine" ></a>
<a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1188_2">~LayoutLine</a> ()
<dl class="el"><dd class="mdescRight">Destructor. <br></dl><li><a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> & <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1188_3">operator=</a> (const <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> &src)
<dl class="el"><dd class="mdescRight">Assignment operator. <a href="#z1188_3"></a><br></dl></ul>
<tr><td colspan="2"><div class="groupHeader">Accessors</div></td></tr>
<ul>
<li><a class="anchor" name="z1189_0" doxytag="GFC::Pango::LayoutLine::pango_layout_line" ></a>
PangoLayoutLine * <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_0">pango_layout_line</a> () const
<dl class="el"><dd class="mdescRight">Get a pointer to the PangoLayoutLine structure. <br></dl><li><a class="anchor" name="z1189_1" doxytag="GFC::Pango::LayoutLine::operator PangoLayoutLine *" ></a>
<a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_1">operator PangoLayoutLine *</a> () const
<dl class="el"><dd class="mdescRight">Conversion operator; safely converts a <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> to a PangoLayoutLine pointer. <br></dl><li><a class="anchor" name="z1189_2" doxytag="GFC::Pango::LayoutLine::start_index" ></a>
int <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_2">start_index</a> () const
<dl class="el"><dd class="mdescRight">Returns the start of line as byte index into the text of the parent layout. <br></dl><li><a class="anchor" name="z1189_3" doxytag="GFC::Pango::LayoutLine::length" ></a>
int <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_3">length</a> () const
<dl class="el"><dd class="mdescRight">Returns the length of line in bytes. <br></dl><li>bool <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_4">is_paragraph_start</a> () const
<dl class="el"><dd class="mdescRight">Determines whether this is the first line of a paragraph. <a href="#z1189_4"></a><br></dl><li>std::vector< std::pair< int,<br>
int > > <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_5">get_x_ranges</a> (int start_index, int end_index) const
<dl class="el"><dd class="mdescRight">Get a list of visual ranges corresponding to a given logical range. <a href="#z1189_5"></a><br></dl><li>void <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_6">get_extents</a> (<a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> *ink_rect, <a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> *logical_rect) const
<dl class="el"><dd class="mdescRight">Compute the logical and ink extents of a layout line. <a href="#z1189_6"></a><br></dl><li>void <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_7">get_pixel_extents</a> (<a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> *ink_rect, <a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> *logical_rect) const
<dl class="el"><dd class="mdescRight">Compute the logical and ink extents of a layout line. <a href="#z1189_7"></a><br></dl><li><a class="elRef" doxygen="gfccore.tag:" href="classGFC_1_1Pointer.html">Pointer</a>< <a class="el" href="classGFC_1_1Gdk_1_1Region.html">Gdk::Region</a> > <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_8">get_clip_region</a> (int x_origin, int y_origin, const std::vector< std::pair< int, int > > &index_ranges) const
<dl class="el"><dd class="mdescRight">Obtains a clip region which contains the areas where the given ranges of text would be drawn. <a href="#z1189_8"></a><br></dl></ul>
<tr><td colspan="2"><div class="groupHeader">Methods</div></td></tr>
<ul>
<li>bool <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1190_0">x_to_index</a> (int x_pos, int *index, int *trailing)
<dl class="el"><dd class="mdescRight">Convert from x offset to the byte index of the corresponding character within the text of the layout. <a href="#z1190_0"></a><br></dl><li>int <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1190_1">index_to_x</a> (int index, bool trailing)
<dl class="el"><dd class="mdescRight">Converts an index within a line to a X position. <a href="#z1190_1"></a><br></dl></ul>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A PangoLayoutLine C++ wrapper class.
<p>
<a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> represents one of the lines resulting from laying out a paragraph via <a class="el" href="classGFC_1_1Pango_1_1Layout.html">Layout</a>. <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> objects are obtained by calling <a class="el" href="classGFC_1_1Pango_1_1Layout.html#z1196_21">Pango::Layout::get_line()</a> and are only valid until the text, attributes, or settings of the parent <a class="el" href="classGFC_1_1Pango_1_1Layout.html">Layout</a> are modified.<p>
Routines for rendering <a class="el" href="classGFC_1_1Pango_1_1Layout.html">Layout</a> objects are provided in code specific to each rendering system.
<p>
<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="z1188_0" doxytag="GFC::Pango::LayoutLine::LayoutLine" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> GFC::Pango::LayoutLine::LayoutLine </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">PangoLayoutLine * </td>
<td class="mdname1" valign="top" nowrap> <em>layout_line</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [explicit]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Construct a new <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> from an existing PangoLayoutLine.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>layout_line</em> </td><td>A pointer to a PangoLayoutLine. </td></tr>
</table>
</dl>
</td>
</tr>
</table>
<a class="anchor" name="z1188_1" doxytag="GFC::Pango::LayoutLine::LayoutLine" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> GFC::Pango::LayoutLine::LayoutLine </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>src</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Copy constructor.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>src</em> </td><td>The source <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a>. </td></tr>
</table>
</dl>
</td>
</tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="z1189_8" doxytag="GFC::Pango::LayoutLine::get_clip_region" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="elRef" doxygen="gfccore.tag:" href="classGFC_1_1Pointer.html">Pointer</a><<a class="el" href="classGFC_1_1Gdk_1_1Region.html">Gdk::Region</a>> GFC::Pango::LayoutLine::get_clip_region </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname" nowrap> <em>x_origin</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>y_origin</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>const std::vector< std::pair< int, int > > & </td>
<td class="mdname" nowrap> <em>index_ranges</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"> const</td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Obtains a clip region which contains the areas where the given ranges of text would be drawn.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>x_origin</em> </td><td>The X pixel where you intend to draw the layout line with this clip. </td></tr>
<tr><td></td><td valign=top><em>y_origin</em> </td><td>The baseline pixel where you intend to draw the layout line with this clip. </td></tr>
<tr><td></td><td valign=top><em>index_ranges</em> </td><td>A reference to a vector of int/int pairs that holds the index ranges. The <em>first</em> value of each pair is the start index and the <em>second</em> value is the end index. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>A smart pointer to a new clip region containing the given ranges.</dd></dl>
<br>
<em>x_origin</em> and <em>y_origin</em> are the same position you would pass to <a class="el" href="classGFC_1_1Gdk_1_1Drawable.html#z135_19">Gdk::Drawable::draw_layout_line()</a>. <em>index_ranges</em> is a vector that should contain ranges of bytes in the layout's text as an int/int pair. The clip region will include space to the left or right of the line (to the layout bounding box) if you have indexes above or below the indexes contained inside the line. This is to draw the selection all the way to the side of the layout. However, the clip region is in line coordinates, not layout coordinates.<p>
See <a class="el" href="classGFC_1_1Pango_1_1Layout.html#z1196_24">Pango::Layout::get_clip_region()</a> for an example of how to create a vector of pair. </td>
</tr>
</table>
<a class="anchor" name="z1189_6" doxytag="GFC::Pango::LayoutLine::get_extents" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void GFC::Pango::LayoutLine::get_extents </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> * </td>
<td class="mdname" nowrap> <em>ink_rect</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> * </td>
<td class="mdname" nowrap> <em>logical_rect</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"> const</td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Compute the logical and ink extents of a layout line.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>ink_rect</em> </td><td>The rectangle used to store the extents of the glyph string as drawn, or null to indicate that the result is not needed. </td></tr>
<tr><td></td><td valign=top><em>logical_rect</em> </td><td>The rectangle used to store the logical extents of the glyph string, or null to indicate that the result is not needed.</td></tr>
</table>
</dl>
<br>
See the documentation for <a class="el" href="classGFC_1_1Pango_1_1Font.html#z1169_5">Pango::Font::get_glyph_extents()</a> for details about the interpretation of the rectangles. </td>
</tr>
</table>
<a class="anchor" name="z1189_7" doxytag="GFC::Pango::LayoutLine::get_pixel_extents" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> void GFC::Pango::LayoutLine::get_pixel_extents </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> * </td>
<td class="mdname" nowrap> <em>ink_rect</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap><a class="el" href="classGFC_1_1Pango_1_1Rectangle.html">Rectangle</a> * </td>
<td class="mdname" nowrap> <em>logical_rect</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"> const</td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Compute the logical and ink extents of a layout line.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>ink_rect</em> </td><td>The rectangle used to store the extents of the glyph string as drawn, or null to indicate that the result is not needed. </td></tr>
<tr><td></td><td valign=top><em>logical_rect</em> </td><td>The rectangle used to store the logical extents of the glyph string, or null to indicate that the result is not needed.</td></tr>
</table>
</dl>
<br>
See the documentation for <a class="el" href="classGFC_1_1Pango_1_1Font.html#z1169_5">Pango::Font::get_glyph_extents()</a> for details about the interpretation of the rectangles. The returned rectangles are in device units, as opposed to <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_6">get_extents()</a>, which returns the extents in GlyphUnits. </td>
</tr>
</table>
<a class="anchor" name="z1189_5" doxytag="GFC::Pango::LayoutLine::get_x_ranges" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> std::vector<std::pair<int, int> > GFC::Pango::LayoutLine::get_x_ranges </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname" nowrap> <em>start_index</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>end_index</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"> const</td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Get a list of visual ranges corresponding to a given logical range.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>start_index</em> </td><td>The starting byte index of the logical range. </td></tr>
<tr><td></td><td valign=top><em>end_index</em> </td><td>The end byte index of the logical range. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>A vector of int/int pairs (see example below).</dd></dl>
<br>
If <em>start_index</em> is less than the start index for the line, then the first range will extend all the way to the leading edge of the layout. Otherwise it will start at the leading edge of the first character. If <em>end_index</em> is greater than the end index for the line, then the last range will extend all the way to the trailing edge of the layout. Otherwise, it will end at the trailing edge of the last character.<p>
This list is not necessarily minimal - there may be consecutive ranges which are adjacent. The ranges will be sorted from left to right. The ranges are with respect to the left edge of the entire layout, not with respect to the line.<p>
The return value is not as strange as it looks. A std::pair is a container that stores 2 values, and vector you already know, so the return value is a vector of int/int pairs. In a std::pair the first value is called <em>first</em> and the second value is called <em>second</em>. In the returned vector each pair is a range. In each pair the first value is the start of the range and the second value is the width of the range. The coordinates are relative to the layout and are in GlyphUnits. To access the values returned in the pairs you would do something like this: <div class="fragment"><pre> std::vector<std::pair<int, int> > ranges = <a class="code" href="classGFC_1_1Pango_1_1LayoutLine.html#z1189_5">get_x_ranges</a>(start_index, end_index);
<span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < ranges.size(); i++)
{
<span class="keywordtype">int</span> start_of_range = ranges[i].first;
<span class="keywordtype">int</span> width_of_range = ranges[i].second;
...
}
</pre></div>Note the space between the two >s; >> is the right shift operator. </td>
</tr>
</table>
<a class="anchor" name="z1190_1" doxytag="GFC::Pango::LayoutLine::index_to_x" ></a><p>
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<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> int GFC::Pango::LayoutLine::index_to_x </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname" nowrap> <em>index</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>bool </td>
<td class="mdname" nowrap> <em>trailing</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Converts an index within a line to a X position.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>index</em> </td><td>The byte offset of a grapheme within the layout. </td></tr>
<tr><td></td><td valign=top><em>trailing</em> </td><td>Whether to compute the result for the leading or trailing edge of the grapheme. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>The x_offset (in GlyphUnits). </dd></dl>
</td>
</tr>
</table>
<a class="anchor" name="z1189_4" doxytag="GFC::Pango::LayoutLine::is_paragraph_start" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> bool GFC::Pango::LayoutLine::is_paragraph_start </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const</td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Determines whether this is the first line of a paragraph.
<p>
<dl compact><dt><b>Returns:</b></dt><dd><em>true</em> if this is the first line of a paragraph. </dd></dl>
</td>
</tr>
</table>
<a class="anchor" name="z1188_3" doxytag="GFC::Pango::LayoutLine::operator=" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a>& GFC::Pango::LayoutLine::operator= </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>src</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Assignment operator.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>src</em> </td><td>The source <a class="el" href="classGFC_1_1Pango_1_1LayoutLine.html">LayoutLine</a>. </td></tr>
</table>
</dl>
</td>
</tr>
</table>
<a class="anchor" name="z1190_0" doxytag="GFC::Pango::LayoutLine::x_to_index" ></a><p>
<table class="mdTable" width="100%" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top"> bool GFC::Pango::LayoutLine::x_to_index </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">int </td>
<td class="mdname" nowrap> <em>x_pos</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>int * </td>
<td class="mdname" nowrap> <em>index</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td></td>
<td class="md" nowrap>int * </td>
<td class="mdname" nowrap> <em>trailing</em></td>
</tr>
<tr>
<td></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Convert from x offset to the byte index of the corresponding character within the text of the layout.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td></td><td valign=top><em>x_pos</em> </td><td>The x offset (in GlyphUnits) from the left edge of the line. </td></tr>
<tr><td></td><td valign=top><em>index</em> </td><td>The location to store the calculated byte offset for the grapheme in which the user clicked. </td></tr>
<tr><td></td><td valign=top><em>trailing</em> </td><td>The location to store a integer indicating where in the grapheme the user clicked. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd><em>false</em> if x_pos was outside the line, <em>true</em> if inside.</dd></dl>
<br>
If x_pos is outside the line, the start or end of the line will be stored at index. <em>trailing</em> will either be zero, or the number of characters in the grapheme. 0 represents the trailing edge of the cluster. </td>
</tr>
</table>
<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="pango_2layout_8hh-source.html">pango/layout.hh</a></ul>
<hr size="1"><address style="align: right;"><small>Generated on Tue Aug 24 00:34:46 2004 for GFC-UI by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0 ></a> 1.3.8 </small></address>
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