From 6c0355d7194c60dcb778bb34a3df5a9bac511f37 Mon Sep 17 00:00:00 2001
From: Agustin Zubiaga <aguz@sugarlabs.org>
Date: Mon, 02 Jul 2012 00:48:34 +0000
Subject: Some charts.py fixes (sugarpycha)

---
(limited to 'sugarpycha/scatter.py')

diff --git a/sugarpycha/scatter.py b/sugarpycha/scatter.py
new file mode 100644
index 0000000..27656de
--- /dev/null
+++ b/sugarpycha/scatter.py
@@ -0,0 +1,38 @@
+# Copyright(c) 2007-2010 by Lorenzo Gil Sanchez <lorenzo.gil.sanchez@gmail.com>
+#
+# This file is part of PyCha.
+#
+# PyCha is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# PyCha is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with PyCha.  If not, see <http://www.gnu.org/licenses/>.
+
+import math
+
+from pycha.line import LineChart
+
+
+class ScatterplotChart(LineChart):
+
+    def _renderChart(self, cx):
+        """Renders a scatterplot"""
+
+        def drawSymbol(point, size):
+            ox = point.x * self.layout.chart.w + self.layout.chart.x
+            oy = point.y * self.layout.chart.h + self.layout.chart.y
+            cx.arc(ox, oy, size, 0.0, 2 * math.pi)
+            cx.fill()
+
+        for key in self._getDatasetsKeys():
+            cx.set_source_rgb(*self.colorScheme[key])
+            for point in self.points:
+                if point.name == key:
+                    drawSymbol(point, self.options.stroke.width)
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