<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!--Rendered using the Haskell Html Library v0.2--> <HTML ><HEAD ><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=UTF-8" ><TITLE >Graphics.Rendering.Pango.Context</TITLE ><LINK HREF="haddock.css" REL="stylesheet" TYPE="text/css" ><SCRIPT SRC="haddock-util.js" TYPE="text/javascript" ></SCRIPT ><SCRIPT TYPE="text/javascript" >window.onload = function () {setSynopsis("mini_Graphics-Rendering-Pango-Context.html")};</SCRIPT ></HEAD ><BODY ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="topbar" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD ><IMG SRC="haskell_icon.gif" WIDTH="16" HEIGHT="16" ALT=" " ></TD ><TD CLASS="title" >pango-0.11.2: Binding to the Pango text rendering engine.</TD ><TD CLASS="topbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html" >Source code</A ></TD ><TD CLASS="topbut" ><A HREF="index.html" >Contents</A ></TD ><TD CLASS="topbut" ><A HREF="doc-index.html" >Index</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="modulebar" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD ><FONT SIZE="6" >Graphics.Rendering.Pango.Context</FONT ></TD ><TD ALIGN="right" ><TABLE CLASS="narrow" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="infohead" >Portability</TD ><TD CLASS="infoval" >portable (depends on GHC)</TD ></TR ><TR ><TD CLASS="infohead" >Stability</TD ><TD CLASS="infoval" >provisional</TD ></TR ><TR ><TD CLASS="infohead" >Maintainer</TD ><TD CLASS="infoval" >gtk2hs-users@lists.sourceforge.net</TD ></TR ></TABLE ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="section4" ><B >Contents</B ></TD ></TR ><TR ><TD ><DL ><DT ><A HREF="#1" >Types and Methods for <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TT >s </A ></DT ></DL ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" >Description</TD ></TR ><TR ><TD CLASS="doc" ><P >This module defines <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TT >s, an environment that provides information on available fonts, internationalization and output capabilities of the medium. Given such a context, text can be rendered into strings of glyphs (see Graphics.Rendering.Pango.Rendering) or, at a more abstract level, using layouts (see Graphics.Rendering.Pango.Layout.Layout). </P ><UL ><LI > A <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TT > is a prerequisite for all text rendering functions. A context can be created from scratch or, more conveniently, by using default settings that are already used in the application. When text is rendered through Gdk, use Graphics.UI.Gtk.Abstract.Widget.widgetCreatePangoContext, if you use the Cairo rendering engine, a new context can be acquired using Graphics.Rendering.Cairo.cairoCreateContext. </LI ><LI > The properties of a <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TT > can be changed which, in turn, has an effect on how text is rendered. To reflect such a change in the rendered text, call Graphics.Rendering.Pango.Layout.layoutContextChanged. </LI ></UL ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" >Synopsis</TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >data</SPAN > <A HREF="#t%3APangoContext" >PangoContext</A > </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >class</SPAN > <A HREF="/usr/share/doc/ghc/html/libraries/glib-0.11.2/System-Glib-GObject.html#t%3AGObjectClass" >GObjectClass</A > o => <A HREF="#t%3APangoContextClass" >PangoContextClass</A > o </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextListFamilies" >contextListFamilies</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > [<A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontFamily" >FontFamily</A >]</TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextGetMetrics" >contextGetMetrics</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A > -> <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3AFontMetrics" >FontMetrics</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextSetFontDescription" >contextSetFontDescription</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextGetFontDescription" >contextGetFontDescription</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><SPAN CLASS="keyword" >data</SPAN > <A HREF="#t%3ALanguage" >Language</A > </TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AemptyLanguage" >emptyLanguage</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AlanguageFromString" >languageFromString</A > :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextSetLanguage" >contextSetLanguage</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextGetLanguage" >contextGetLanguage</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextSetTextDir" >contextSetTextDir</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoDirection" >PangoDirection</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextGetTextDir" >contextGetTextDir</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoDirection" >PangoDirection</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextSetTextGravity" >contextSetTextGravity</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravity" >PangoGravity</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextGetTextGravity" >contextGetTextGravity</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravity" >PangoGravity</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextSetTextGravityHint" >contextSetTextGravityHint</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravityHint" >PangoGravityHint</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextGetTextGravityHint" >contextGetTextGravityHint</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravityHint" >PangoGravityHint</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextGetMatrix" >contextGetMatrix</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/cairo-0.11.1/Graphics-Rendering-Cairo-Matrix.html#t%3AMatrix" >Matrix</A ></TD ></TR ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="#v%3AcontextSetMatrix" >contextSetMatrix</A > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/cairo-0.11.1/Graphics-Rendering-Cairo-Matrix.html#t%3AMatrix" >Matrix</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="section1" ><A NAME="1" ><A NAME="1" >Types and Methods for <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TT >s </A ></A ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><SPAN CLASS="keyword" >data</SPAN > <A NAME="t:PangoContext" ><A NAME="t%3APangoContext" ></A ></A ><B >PangoContext</B > </TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Types.html#PangoContext" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:PangoContext')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:PangoContext" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq" >Eq</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Ord.html#t%3AOrd" >Ord</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="/usr/share/doc/ghc/html/libraries/glib-0.11.2/System-Glib-GObject.html#t%3AGObjectClass" >GObjectClass</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContextClass" >PangoContextClass</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><SPAN CLASS="keyword" >class</SPAN > <A HREF="/usr/share/doc/ghc/html/libraries/glib-0.11.2/System-Glib-GObject.html#t%3AGObjectClass" >GObjectClass</A > o => <A NAME="t:PangoContextClass" ><A NAME="t%3APangoContextClass" ></A ></A ><B >PangoContextClass</B > o </TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Types.html#PangoContextClass" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="s8" ></TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:PangoContextClass')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:PangoContextClass" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContextClass" >PangoContextClass</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextListFamilies" ><A NAME="v%3AcontextListFamilies" ></A ></A ><B >contextListFamilies</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > [<A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontFamily" >FontFamily</A >]</TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextListFamilies" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" ><P >Retrieve a list of all available font families. </P ><UL ><LI > A font family is the name of the font without further attributes like slant, variant or size. </LI ></UL ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextGetMetrics" ><A NAME="v%3AcontextGetMetrics" ></A ></A ><B >contextGetMetrics</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A > -> <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3AFontMetrics" >FontMetrics</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextGetMetrics" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Query the metrics of the given font implied by the font description. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextSetFontDescription" ><A NAME="v%3AcontextSetFontDescription" ></A ></A ><B >contextSetFontDescription</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextSetFontDescription" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Set the default <TT ><A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A ></TT > of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextGetFontDescription" ><A NAME="v%3AcontextGetFontDescription" ></A ></A ><B >contextGetFontDescription</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextGetFontDescription" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Get the current <TT ><A HREF="Graphics-Rendering-Pango-Font.html#t%3AFontDescription" >FontDescription</A ></TT > of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><SPAN CLASS="keyword" >data</SPAN > <A NAME="t:Language" ><A NAME="t%3ALanguage" ></A ></A ><B >Language</B > </TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-BasicTypes.html#Language" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="body" ><TABLE CLASS="vanilla" CELLSPACING="0" CELLPADDING="0" ><TR ><TD CLASS="ndoc" >An RFC-3066 language designator to choose scripts. </TD ></TR ><TR ><TD CLASS="section4" ><IMG SRC="minus.gif" CLASS="coll" ONCLICK="toggle(this,'i:Language')" ALT="show/hide" > Instances</TD ></TR ><TR ><TD CLASS="body" ><DIV ID="i:Language" STYLE="display:block;" ><TABLE CLASS="vanilla" CELLSPACING="1" CELLPADDING="0" ><TR ><TD CLASS="decl" ><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Eq.html#t%3AEq" >Eq</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ></TR ><TR ><TD CLASS="decl" ><A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Text-Show.html#t%3AShow" >Show</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:emptyLanguage" ><A NAME="v%3AemptyLanguage" ></A ></A ><B >emptyLanguage</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-BasicTypes.html#emptyLanguage" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Specifying no particular language. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:languageFromString" ><A NAME="v%3AlanguageFromString" ></A ></A ><B >languageFromString</B > :: <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/Data-Char.html#t%3AString" >String</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-BasicTypes.html#languageFromString" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" ><P >Take a RFC-3066 format language tag as a string and convert it to a <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TT > type that can be efficiently passed around and compared with other language tags. </P ><UL ><LI > This function first canonicalizes the string by converting it to lowercase, mapping '_' to '-', and stripping all characters other than letters and '-'. </LI ></UL ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextSetLanguage" ><A NAME="v%3AcontextSetLanguage" ></A ></A ><B >contextSetLanguage</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextSetLanguage" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Set the default <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TT > of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextGetLanguage" ><A NAME="v%3AcontextGetLanguage" ></A ></A ><B >contextGetLanguage</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextGetLanguage" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Get the current <TT ><A HREF="Graphics-Rendering-Pango-Context.html#t%3ALanguage" >Language</A ></TT > of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextSetTextDir" ><A NAME="v%3AcontextSetTextDir" ></A ></A ><B >contextSetTextDir</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoDirection" >PangoDirection</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextSetTextDir" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Set the default text direction of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextGetTextDir" ><A NAME="v%3AcontextGetTextDir" ></A ></A ><B >contextGetTextDir</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoDirection" >PangoDirection</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextGetTextDir" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Get the current text direction of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextSetTextGravity" ><A NAME="v%3AcontextSetTextGravity" ></A ></A ><B >contextSetTextGravity</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravity" >PangoGravity</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextSetTextGravity" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Set the text gravity of this context. If the given value is <TT ><A HREF="Graphics-Rendering-Pango-Enums.html#v%3APangoGravityAuto" >PangoGravityAuto</A ></TT > then the gravity is derived from the current rotation matrix. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextGetTextGravity" ><A NAME="v%3AcontextGetTextGravity" ></A ></A ><B >contextGetTextGravity</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravity" >PangoGravity</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextGetTextGravity" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Get the current text gravity of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextSetTextGravityHint" ><A NAME="v%3AcontextSetTextGravityHint" ></A ></A ><B >contextSetTextGravityHint</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravityHint" >PangoGravityHint</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextSetTextGravityHint" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Set the text gravity hint of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextGetTextGravityHint" ><A NAME="v%3AcontextGetTextGravityHint" ></A ></A ><B >contextGetTextGravityHint</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="Graphics-Rendering-Pango-Enums.html#t%3APangoGravityHint" >PangoGravityHint</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextGetTextGravityHint" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" >Get the current text gravity of this context. </TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextGetMatrix" ><A NAME="v%3AcontextGetMatrix" ></A ></A ><B >contextGetMatrix</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/cairo-0.11.1/Graphics-Rendering-Cairo-Matrix.html#t%3AMatrix" >Matrix</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextGetMatrix" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" ><P >Gets the transformation matrix that will be applied when rendering with this context. </P ><UL ><LI > Since Pango 1.6 </LI ></UL ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="topdecl" ><TABLE CLASS="declbar" ><TR ><TD CLASS="declname" ><A NAME="v:contextSetMatrix" ><A NAME="v%3AcontextSetMatrix" ></A ></A ><B >contextSetMatrix</B > :: <A HREF="Graphics-Rendering-Pango-Context.html#t%3APangoContext" >PangoContext</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/cairo-0.11.1/Graphics-Rendering-Cairo-Matrix.html#t%3AMatrix" >Matrix</A > -> <A HREF="/usr/share/doc/ghc/html/libraries/base-4.2.0.2/System-IO.html#t%3AIO" >IO</A > <A HREF="/usr/share/doc/ghc/html/libraries/ghc-prim-0.2.0.0/GHC-Unit.html#t%3A%28%29" >()</A ></TD ><TD CLASS="declbut" ><A HREF="src/Graphics-Rendering-Pango-Context.html#contextSetMatrix" >Source</A ></TD ></TR ></TABLE ></TD ></TR ><TR ><TD CLASS="doc" ><P >Sets the transformation matrix that will be applied when rendering with this context. Note that any metrics reported by other functions are in user space coordinates before the application of the matrix, not device-space coordinates after the application of the matrix. So, they don't scale with the matrix, though they may change slightly for different matrices, depending on how the text is fit to the pixel grid. </P ><UL ><LI > Since Pango 1.6 </LI ></UL ></TD ></TR ><TR ><TD CLASS="s15" ></TD ></TR ><TR ><TD CLASS="botbar" >Produced by <A HREF="http://www.haskell.org/haddock/" >Haddock</A > version 2.6.1</TD ></TR ></TABLE ></BODY ></HTML >