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POPrinting with Gtk.Printing/cairo/pango in gtk2hs - Print-operations in Haskell
 

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  1. POPrinting with Gtk.Printing/cairo/pango in gtk2hs - Print-operations in Haskell
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    <p>I am currently trying to print files or text (to a printer, not to a terminal etc.) in Haskell with gtk(2hs) using <code>Graphics.UI.Gtk.Printing</code>, Cairo and Pango.</p> <p>Code is the following:</p> <pre><code>op &lt;- printOperationNew on op printOptBeginPrint $ \context -&gt; do set op [ printOperationNPages := 1] return () on op printOptDrawPage $ \context pages - do let text = "Hello World" putStrLn $ "Printing :" ++ text --cairo cairoContext&lt;- printContextGetCairoContext context --pango layout&lt;- printContextCreatePangoLayout context layoutSetText layout text let _ = do --inside the Render Monad showLayout layout return () return () result &lt;- printOperationRun op PrintOperationActionPrintDialog window </code></pre> <p>This prints an empty page since I set the <code>printOperationNPages</code> to 1. The problem is that cairo does not draw anything. I suppose I have to connect the <code>cairoContext</code> with the pango layout, the proper call to <code>showLayout</code> would actually be <code>pango_cairo_show_layout (cr, layout);</code>.</p> <p>I already discussed this problem on the mailing list for gtk2hs [1].</p> <p>So if anybody has experience with this, please let me know. I would also be grateful for other - preferable platform-independent - solutions to printing files/text in haskell.</p> <p>Link to conversation: [1] <a href="http://sourceforge.net/mailarchive/message.php?msg_id=27662267" rel="nofollow">http://sourceforge.net/mailarchive/message.php?msg_id=27662267</a></p> <p>GTK(2hs) in Hackage: <a href="http://hackage.haskell.org/package/gtk-0.12.0" rel="nofollow">http://hackage.haskell.org/package/gtk-0.12.0</a></p>
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    1. COgtk-cairo: http://projects.haskell.org/gtk2hs/docs/gtk-docs-0.11.0/Graphics-UI-Gtk-Cairo.html
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    2. COgtk higher-level printing api: http://developer.gnome.org/gtk/2.24/gtk-High-level-Printing-API.html
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