From 6df236b61aa9888a215741cf36fbf394611af8c0 Mon Sep 17 00:00:00 2001
From: Daniel Francis <santiago.danielfrancis@gmail.com>
Date: Tue, 14 Feb 2012 11:26:00 +0000
Subject: Save as .png function

---
diff --git a/lybniz.py b/lybniz.py
index b37cff8..14292eb 100755
--- a/lybniz.py
+++ b/lybniz.py
@@ -318,6 +318,12 @@ class GraphClass:
         return (x - self.x_min) * self.canvas_width / (self.x_max - self.x_min)
 
 class LybnizActivity(activity.Activity):
+    def write_file(self, file_path):
+        x, y, w, h = self.graph.drawing_area.get_allocation()
+        pix_buffer = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, False, 8, w, h)
+        pix_buffer.get_from_drawable(self.graph.pix_map, self.graph.pix_map.get_colormap(), 0, 0, 0, 0, w, h)
+        pix_buffer.save(file_path, "png")
+    
     def parameter_entries_repopulate(self):
         # set text in entries for parameters
         self.y1_entry.set_text(y1)
--
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