[kupfer] show_qrcode: Add plugin to show text as QR Code

[Ulrik Sverdrup <usverdrup src gnome org>]

commit 557dcaddc4193cb792dd95e2b56834e2c08433c7
Author: Thomas Renard <cybaer42 web de>
Date:   Thu Mar 3 02:09:49 2011 +0100

    show_qrcode: Add plugin to show text as QR Code
    
    The plugin depends on a python module 'qrencode'
    
    Lauchpad-bug: https://bugs.launchpad.net/kupfer/+bug/611162

 kupfer/plugin/show_qrcode.py |   62 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 62 insertions(+), 0 deletions(-)
---
diff --git a/kupfer/plugin/show_qrcode.py b/kupfer/plugin/show_qrcode.py
new file mode 100644
index 0000000..b736c23
--- /dev/null
+++ b/kupfer/plugin/show_qrcode.py
@@ -0,0 +1,62 @@
+"""Create QRCodes from texts or urls. Useful for smartphones with QRCode
+readers: Create some url with kupfer and QRCode it. Get it with the phone and 
+use it's browser to display"""
+
+__kupfer_name__ = _("Show QRCode")
+__kupfer_actions__ = (
+			"ShowQRCode",
+	)
+__description__ = _("Display text as QRCode in a window")
+__version__ = "0.0.2"
+__author__ = "Thomas Renard <cybaer42 web de>"
+
+import StringIO
+
+import gtk
+import qrencode
+
+from kupfer.objects import Action, Leaf
+
+class ShowQRCode (Action):
+	"""Create QRCode windows from text or url"""
+
+	def __init__(self):
+		"""initialize action"""
+		Action.__init__(self, _("Show QRCode"))
+
+	def activate(self, leaf):
+		"""Create the image from leaf text and display it on window"""
+
+		image_file = StringIO.StringIO()
+		text = leaf.get_text_representation()
+		version, size, image = qrencode.encode_scaled(text, size=300)
+		image.save(image_file, "ppm")
+		image_contents = image_file.getvalue()
+		image_file.close()
+
+		loader = gtk.gdk.PixbufLoader("pnm")
+		loader.write(image_contents, len(image_contents))
+		pixbuf = loader.get_pixbuf()
+		loader.close()
+		window = gtk.Window()
+		window.set_default_size(350, 350)
+		image = gtk.Image()
+		image.set_from_pixbuf(pixbuf)
+		image.show()
+		window.add(image)
+		window.show()
+
+	def item_types(self):
+		yield Leaf
+
+	def valid_for_item(self, leaf):
+		return hasattr(leaf, "get_text_representation")
+
+	def get_description(self):
+		"""The Action description"""
+		return _("Display text as QRCode in a window")
+
+	def get_icon_name(self):
+		"""Name of the icon"""
+		return "format-text-bold"
+