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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-gtkprintcontext">
<refnamediv>
<refname>gtk.PrintContext</refname>
<refpurpose>Encapsulates context for drawing pages (new in PyGTK 2.10)</refpurpose>
</refnamediv>
<refsect1>
<title>Synopsis</title>
<classsynopsis language="python">
<ooclass><classname>gtk.PrintContext</classname></ooclass>
<ooclass><classname><link linkend="class-gobject">gobject.GObject</link></classname></ooclass>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--get-cairo-context">get_cairo_context</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--get-page-setup">get_page_setup</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--get-width">get_width</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--get-height">get_height</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--get-dpi-x">get_dpi_x</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--get-dpi-y">get_dpi_y</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--get-pango-fontmap">get_pango_fontmap</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--create-pango-context">create_pango_context</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--create-pango-layout">create_pango_layout</link></methodname>
<methodparam></methodparam>
</methodsynopsis>
<methodsynopsis language="python">
<methodname><link linkend="method-gtkprintcontext--set-cairo-context">set_cairo_context</link></methodname>
<methodparam><parameter role="keyword">cr</parameter></methodparam>
<methodparam><parameter role="keyword">dpi_x</parameter></methodparam>
<methodparam><parameter role="keyword">dpi_y</parameter></methodparam>
</methodsynopsis>
</classsynopsis>
</refsect1>
<refsect1>
<title>Ancestry</title>
<synopsis>+-- <link linkend="class-gobject">gobject.GObject</link>
+-- <link linkend="class-gtkprintcontext">gtk.PrintContext</link>
</synopsis>
</refsect1>
<refsect1 id="signal-prototypes-gtkprintcontext">
<title>gtk.PrintContext Signal Prototypes</title>
<para><link linkend="signal-prototypes-gobject">gobject.GObject Signal Prototypes</link></para>
</refsect1>
<refsect1>
<title>Description</title>
<para>A <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>
encapsulates context information that is required when drawing pages for
printing, such as the cairo context and important parameters like page
size and resolution. It also lets you easily create <link
linkend="class-pangolayout"><classname>pango.Layout</classname></link>
and <link
linkend="class-pangocontext"><classname>pango.Context</classname></link>
objects that match the font metrics of the cairo surface.</para>
<para><link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>
objects gets passed to the "begin-print", "end-print",
"request-page-setup" and "draw-page" signals on the <link
linkend="class-gtkprintoperation"><classname>gtk.PrintOperation</classname></link>.</para>
<example>
<title>Using <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>
in a "draw-page" callback</title>
<programlisting>
def draw_page(operation, context, page_nr):
cr = context.get_cairo_context()
# Draw a red rectangle, as wide as the paper (inside the margins)
cr.set_source_rgb(1.0, 0, 0)
cr.rectangle(0, 0, context.get_width(), 50)
cr.fill()
# Draw some lines
cr.move_to(20, 10)
cr.line_to(40, 20)
cr.arc(60, 60, 20, 0, M_PI)
cr.line_to(80, 20)
cr.set_source_rgb(0, 0, 0)
cr.set_line_width(5)
cr.set_line_cap(cairo.LINE_CAP_ROUND)
cr.set_line_join(cairo.LINE_JOIN_ROUND)
cr.stroke()
# Draw some text
layout = cr.create_layout()
layout.set_text("Hello World! Printing is easy")
desc = pango.FontDescription("sans 28")
layout.set_font_description(desc)
cr.move_to(30, 20)
cr.layout_path(layout)
# Font Outline
cr.set_source_rgb(0.93, 1.0, 0.47)
cr.set_line_width(0.5)
cr.stroke_preserve()
# Font Fill
cr.set_source_rgb(0, 0.0, 1.0)
cr.fill()
</programlisting>
</example>
<para>Printing support was added in GTK+ 2.10.</para>
</refsect1>
<refsect1>
<title>Methods</title>
<refsect2 id="method-gtkprintcontext--get-cairo-context">
<title>gtk.PrintContext.get_cairo_context</title>
<programlisting><methodsynopsis language="python">
<methodname>get_cairo_context</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the cairo context</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>get_cairo_context</methodname>() method returns
the cairo context that is associated with the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--get-page-setup">
<title>gtk.PrintContext.get_page_setup</title>
<programlisting><methodsynopsis language="python">
<methodname>get_page_setup</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the page setup</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>get_page_setup</methodname>() method returns the
<link
linkend="class-gtkpagesetup"><classname>gtk.PageSetup</classname></link>
that determines the page dimensions of the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--get-width">
<title>gtk.PrintContext.get_width</title>
<programlisting><methodsynopsis language="python">
<methodname>get_width</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the width</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>get_width</methodname>() method returns the width
of the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>,
in pixels.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--get-height">
<title>gtk.PrintContext.get_height</title>
<programlisting><methodsynopsis language="python">
<methodname>get_height</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the height</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>get_height</methodname>() method returns the
width of the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>,
in pixels.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--get-dpi-x">
<title>gtk.PrintContext.get_dpi_x</title>
<programlisting><methodsynopsis language="python">
<methodname>get_dpi_x</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the horizontal resolution</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>get_dpi_x</methodname>() method returns the
horizontal resolution of the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>,
in dots per inch.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--get-dpi-y">
<title>gtk.PrintContext.get_dpi_y</title>
<programlisting><methodsynopsis language="python">
<methodname>get_dpi_y</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the vertical resolution</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>get_dpi_y</methodname>() method returns the
vertical resolution of the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>,
in dots per inch.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--get-pango-fontmap">
<title>gtk.PrintContext.get_pango_fontmap</title>
<programlisting><methodsynopsis language="python">
<methodname>get_pango_fontmap</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>the font map</simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The method returns a <link
linkend="class-pangofontmap"><classname>pango.FontMap</classname></link>
that is suitable for use with the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--create-pango-context">
<title>gtk.PrintContext.create_pango_context</title>
<programlisting><methodsynopsis language="python">
<methodname>create_pango_context</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>a new <link
linkend="class-pangocontext"><classname>pango.Context</classname></link></simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>create_pango_context</methodname>() method
creates a new <link
linkend="class-pangocontext"><classname>pango.Context</classname></link>
that can be used with the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--create-pango-layout">
<title>gtk.PrintContext.create_pango_layout</title>
<programlisting><methodsynopsis language="python">
<methodname>create_pango_layout</methodname>
<methodparam></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><emphasis>Returns</emphasis> :</term>
<listitem><simpara>a new <link linkend="class-pangolayout"><classname>pango.Layout</classname></link></simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>create_pango_layout</methodname>() method
creates a new <link
linkend="class-pangolayout"><classname>pango.Layout</classname></link>
that is suitable for use with the <link
linkend="class-gtkprintcontext"><classname>gtk.PrintContext</classname></link>.</para>
</refsect2>
<refsect2 id="method-gtkprintcontext--set-cairo-context">
<title>gtk.PrintContext.set_cairo_context</title>
<programlisting><methodsynopsis language="python">
<methodname>set_cairo_context</methodname>
<methodparam><parameter role="keyword">cr</parameter></methodparam>
<methodparam><parameter role="keyword">dpi_x</parameter></methodparam>
<methodparam><parameter role="keyword">dpi_y</parameter></methodparam>
</methodsynopsis></programlisting>
<variablelist>
<varlistentry>
<term><parameter role="keyword">cr</parameter> :</term>
<listitem><simpara></simpara></listitem>
</varlistentry>
<varlistentry>
<term><parameter role="keyword">dpi_x</parameter> :</term>
<listitem><simpara></simpara></listitem>
</varlistentry>
<varlistentry>
<term><parameter role="keyword">dpi_y</parameter> :</term>
<listitem><simpara></simpara></listitem>
</varlistentry>
</variablelist>
<note>
<para>This method is available in PyGTK 2.10 and above.</para>
</note>
<para>The <methodname>set_cairo_context</methodname>() method sets the
CairoContext specified by <parameter>cr</parameter> as the cairo
context for the print context. <parameter>dpi_x</parameter> and
<parameter>dpi_y</parameter> specify the horizontal and vertical
resolution of the print context.</para>
</refsect2>
</refsect1>
</refentry>
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