From e50e6d3c3d586596839a3174aca9b87b778331f8 Mon Sep 17 00:00:00 2001
From: Agustin Zubiaga <aguz@sugarlabs.org>
Date: Sat, 29 Sep 2012 16:45:23 +0000
Subject: charts -> chart

---
(limited to 'chart.py')

diff --git a/chart.py b/chart.py
new file mode 100644
index 0000000..1abc313
--- /dev/null
+++ b/chart.py
@@ -0,0 +1,140 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# chart.py by:
+#    Agustin Zubiaga <aguz@sugarlabs.org>
+#    Gonzalo Odiard <godiard@gmail.com>
+#    Manuel Quiñones <manuq@laptop.org>
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+import sugarpycha.bar
+import sugarpycha.line
+import sugarpycha.pie
+
+import cairo
+from gi.repository import GObject
+
+# Chart types
+VERTICAL_BAR = 1
+HORIZONTAL_BAR = 2
+LINE = 3
+PIE = 4
+
+
+class Chart(GObject.GObject):
+    def __init__(self, type=VERTICAL_BAR, width=600, height=460):
+        GObject.GObject.__init__(self)
+
+        self.dataSet = None
+        self.options = None
+        self.surface = None
+
+        self.type = type
+        self.width = width
+        self.height = height
+
+    def data_set(self, data):
+        '''Set chart data (dataSet)'''
+
+        self.dataSet = (
+            ('Dots', [(i, l[1]) for i, l in enumerate(data)]),
+            )
+
+        self.options = {
+            'legend': {'hide': True},
+            'titleFontSize': 16,
+            'axis': {
+                'tickFontSize': 12,
+                'labelFontSize': 14,
+                'lineColor': '#b3b3b3',
+                'x': {
+                    'ticks': [dict(v=i, label=l[0]) for i,
+                                                        l in enumerate(data)],
+                    'label': 'X',
+                },
+                'y': {
+                    'tickCount': 5,
+                    'label': 'Y',
+                }
+            },
+            'stroke': {
+                'width': 3
+            },
+            'background': {
+                'chartColor': '#FFFFFF',
+                'lineColor': '#CCCCCC'
+            },
+            'colorScheme': {
+                'name': 'gradient',
+                'args': {
+                    'initialColor': 'blue',
+                },
+            },
+        }
+
+    def set_color_scheme(self, color='blue'):
+        '''Set the chart color scheme'''
+        self.options['colorScheme']['args'] = {'initialColor': color}
+
+    def set_line_color(self, color='#000000'):
+        '''Set the chart line color'''
+        self.options['stroke']['color'] = color
+
+    def set_x_label(self, text='X'):
+        '''Set the X Label'''
+        self.options['axis']['x']['label'] = str(text)
+
+    def set_y_label(self, text='Y'):
+        '''Set the Y Label'''
+        self.options['axis']['y']['label'] = str(text)
+
+    def set_type(self, type=VERTICAL_BAR):
+        '''Set chart type (VERTICAL_BAR, HORIZONTAL_BAR, LINE, PIE)'''
+        self.type = type
+
+    def set_title(self, title='Chart'):
+        '''Set the chart title'''
+        self.options['title'] = title
+
+    def render(self, sg=None):
+        '''Draw the chart
+           Use the self.surface variable for show the chart'''
+        self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
+                                            self.width,
+                                            self.height)
+
+        if self.type == VERTICAL_BAR:
+            chart = sugarpycha.bar.VerticalBarChart(self.surface, self.options)
+
+        elif self.type == HORIZONTAL_BAR:
+            chart = sugarpycha.bar.HorizontalBarChart(self.surface,
+                                                      self.options)
+
+        elif self.type == LINE:
+            chart = sugarpycha.line.LineChart(self.surface, self.options)
+
+        elif self.type == PIE:
+            self.options['legend'] = {'hide': 'False'}
+            chart = sugarpycha.pie.PieChart(self.surface, self.options)
+            self.dataSet = [(data[0],
+                            [[0, data[1]]]) for data in sg.chart_data]
+
+        chart.addDataset(self.dataSet)
+        chart.render()
+
+    def as_png(self, file):
+        '''Save the chart as png image'''
+        self.surface.write_to_png(file)
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