Add funnel and pyramid

demo/simple_test.py

@@ -17,13 +17,35 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
-import sys
+import time
 
 from pygal import *
 from pygal.style import *
 from math import cos, sin
 lnk = lambda v, l=None: {'value': v, 'xlink': 'javascript:alert("Test %s")' % v, 'label': l}
 
+t_start  = time.time()
+
+pyramid = Pyramid()
+
+pyramid.x_labels = ['0-25', '25-45', '45-65', '65+']
+pyramid.add('Man single', [2, 4, 2, 1])
+pyramid.add('Woman single', [10, 6, 1, 1])
+pyramid.add('Man maried', [10, 3, 4, 2])
+pyramid.add('Woman maried', [3, 3, 5, 3])
+
+pyramid.render_to_file('out-pyramid.svg')
+
+
+funnel = Funnel()
+
+funnel.add('1', [1, 2, 3])
+funnel.add('3', [3, 4, 5])
+funnel.add('6', [6, 5, 4])
+funnel.add('12', [12, 2, 9])
+
+funnel.render_to_file('out-funnel.svg')
+
 dot = Dot()
 dot.x_labels = map(str, range(4))
 
@@ -170,3 +192,5 @@ radar.add('test2', [10, 2, 0, 5, 1, 9, 4])
 radar.title = "Radar test"
 
 radar.render_to_file('out-radar.svg')
+
+print "Ok (%dms)" % (1000 * (time.time() - t_start))

pygal/__init__.py

@@ -21,7 +21,7 @@ Pygal -  A python svg graph plotting library
 
 """
 
-__version__ = '0.9.21'
+__version__ = '0.9.22'
 
 from pygal.config import Config
 from pygal.graph.bar import Bar
@@ -30,6 +30,8 @@ from pygal.graph.horizontal import HorizontalBar
 from pygal.graph.horizontal import HorizontalStackedBar
 from pygal.graph.line import Line
 from pygal.graph.pie import Pie
+from pygal.graph.funnel import Funnel
+from pygal.graph.pyramid import Pyramid
 from pygal.graph.radar import Radar
 from pygal.graph.stackedbar import StackedBar
 from pygal.graph.stackedline import StackedLine
@@ -39,11 +41,13 @@ from pygal.graph.xy import XY
 #: List of all chart types
 CHARTS = [
     Bar,
+    Funnel,
     Dot,
     HorizontalBar,
     HorizontalStackedBar,
     Line,
     Pie,
+    Pyramid,
     Radar,
     StackedBar,
     StackedLine,

pygal/graph/bar.py

@@ -115,11 +115,10 @@ class Bar(Graph):
         return stack_vals
 
     def _compute(self):
-        self._box.ymin = min(min(self._values), self.zero)
-        self._box.ymax = max(max(self._values), self.zero)
-        x_step = len(self.series[0].values)
-        x_pos = [x / x_step for x in range(x_step + 1)
-        ] if x_step > 1 else [0, 1]  # Center if only one value
+        self._box.ymin = min(self._min, self.zero)
+        self._box.ymax = max(self._max, self.zero)
+        x_pos = [x / self._len for x in range(self._len + 1)
+        ] if self._len > 1 else [0, 1]  # Center if only one value
         y_pos = compute_scale(
             self._box.ymin, self._box.ymax, self.logarithmic
         ) if not self.y_labels else map(float, self.y_labels)

pygal/graph/base.py

@@ -125,6 +125,11 @@ class BaseGraph(object):
         """Getter for the maximum series size"""
         return max([len(serie.values) for serie in self.series])
 
+    @cached_property
+    def _min(self):
+        """Getter for the minimum series value"""
+        return min(self._values)
+
     @cached_property
     def _max(self):
         """Getter for the maximum series value"""

pygal/graph/funnel.py

@@ -0,0 +1,97 @@
+# -*- coding: utf-8 -*-
+# This file is part of pygal
+#
+# A python svg graph plotting library
+# Copyright © 2012 Kozea
+#
+# This library 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.
+#
+# This library 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 pygal. If not, see <http://www.gnu.org/licenses/>.
+"""
+Funnel chart
+
+"""
+
+from __future__ import division
+from pygal.util import decorate, cut, compute_scale
+from pygal.serie import PositiveValue
+from pygal.graph.graph import Graph
+
+
+class Funnel(Graph):
+    """Funnel graph"""
+
+    __value__ = PositiveValue
+
+    def _format(self, value):
+        return super(Funnel, self)._format(abs(value))
+
+    def funnel(self, serie_node, serie):
+        """Draw a dot line"""
+
+        fmt = lambda x: '%f %f' % x
+        for i, poly in enumerate(serie.points):
+            metadata = serie.metadata[i]
+            value = self._format(serie.values[i])
+
+            funnels = decorate(
+                self.svg,
+                self.svg.node(serie_node['plot'], class_="funnels"),
+                metadata)
+
+            self.svg.node(
+                funnels, 'polygon',
+                points=' '.join(map(fmt, map(self.view, poly))),
+                class_='funnel reactive tooltip-trigger')
+
+            x, y = self.view((
+                self._x_labels[serie.index][1],  # Poly center from label
+                sum([point[1] for point in poly]) / len(poly)))
+            self._tooltip_data(funnels, value, x, y, classes='centered')
+            self._static_value(serie_node, value, x, y)
+
+    def _compute(self):
+        xlen = len(self.series)
+        x_pos = [(x + 1) / xlen for x in range(xlen)
+        ] if xlen != 1 else [.5]  # Center if only one value
+
+        previous = [[0, 0] for i in range(self._len)]
+        for i, serie in enumerate(self.series):
+            y_height = - sum(serie.values) / 2
+            all_x_pos = [0] + x_pos
+            serie.points = []
+            for j, value in enumerate(serie.values):
+                poly = []
+                poly.append((all_x_pos[i], previous[j][0]))
+                poly.append((all_x_pos[i], previous[j][1]))
+                previous[j][0] = y_height
+                y_height = previous[j][1] = y_height + value
+                poly.append((all_x_pos[i + 1], previous[j][1]))
+                poly.append((all_x_pos[i + 1], previous[j][0]))
+                serie.points.append(poly)
+
+        val_max = max(map(sum, cut(self.series, 'values')))
+        self._box.ymin = -val_max
+        self._box.ymax = val_max
+
+        y_pos = compute_scale(
+            self._box.ymin, self._box.ymax, self.logarithmic
+        ) if not self.y_labels else map(float, self.y_labels)
+
+        self._x_labels = zip(cut(self.series, 'title'),
+                             map(lambda x: x - 1 / (2 * xlen), x_pos))
+        self._y_labels = zip(map(self._format, y_pos), y_pos)
+
+    def _plot(self):
+        for serie in self.series:
+            self.funnel(
+                self._serie(serie.index), serie)

pygal/graph/line.py

@@ -97,20 +97,20 @@ class Line(Graph):
     def _compute(self):
         x_pos = [x / (self._len - 1) for x in range(self._len)
         ] if self._len != 1 else [.5]  # Center if only one value
+
         for serie in self.series:
-            if not hasattr(serie, 'points'):
-                serie.points = [
-                    (x_pos[i], v)
-                    for i, v in enumerate(serie.values)]
-                if self.interpolate:
-                    serie.interpolated = self._interpolate(serie.values, x_pos)
+            serie.points = [
+                (x_pos[i], v)
+                for i, v in enumerate(serie.values)]
+            if self.interpolate:
+                serie.interpolated = self._interpolate(serie.values, x_pos)
 
         if self.include_x_axis:
-            self._box.ymin = min(min(self._values), 0)
-            self._box.ymax = max(max(self._values), 0)
+            self._box.ymin = min(self._min, 0)
+            self._box.ymax = max(self._max, 0)
         else:
-            self._box.ymin = min(self._values)
-            self._box.ymax = max(self._values)
+            self._box.ymin = self._min
+            self._box.ymax = self._max
 
         y_pos = compute_scale(
             self._box.ymin, self._box.ymax, self.logarithmic

pygal/graph/pyramid.py

@@ -0,0 +1,77 @@
+# -*- coding: utf-8 -*-
+# This file is part of pygal
+#
+# A python svg graph plotting library
+# Copyright © 2012 Kozea
+#
+# This library 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.
+#
+# This library 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 pygal. If not, see <http://www.gnu.org/licenses/>.
+"""
+Pyramid chart
+
+"""
+
+from __future__ import division
+from pygal.util import decorate, cut, compute_scale
+from pygal.serie import PositiveValue
+from pygal.graph.bar import Bar
+from pygal.graph.horizontal import HorizontalGraph
+
+
+class VerticalPyramid(Bar):
+    """Pyramid graph"""
+
+    __value__ = PositiveValue
+
+    def _format(self, value):
+        return super(VerticalPyramid, self)._format(abs(value))
+
+    def _compute(self):
+        positive_vals = zip(*[serie.values for serie in self.series
+                              if serie.index % 2])
+        negative_vals = zip(*[serie.values for serie in self.series
+                              if not serie.index % 2])
+        positive_sum = map(sum, positive_vals) or [0]
+        negative_sum = map(sum, negative_vals)
+
+        self._box.ymax = max(max(positive_sum), max(negative_sum))
+        self._box.ymin = - self._box.ymax
+
+        x_pos = [x / self._len
+                 for x in range(self._len + 1)
+             ] if self._len > 1 else [0, 1]  # Center if only one value
+        y_pos = compute_scale(
+            self._box.ymin, self._box.ymax, self.logarithmic
+        ) if not self.y_labels else map(float, self.y_labels)
+
+        self._x_ranges = zip(x_pos, x_pos[1:])
+
+        self._x_labels = self.x_labels and zip(self.x_labels, [
+            sum(x_range) / 2 for x_range in self._x_ranges])
+        self._y_labels = zip(map(self._format, y_pos), y_pos)
+
+    def _plot(self):
+        stack_vals = [[0, 0] for i in range(self._len)]
+        for serie in self.series:
+            serie_node = self._serie(serie.index)
+            stack_vals = self.bar(
+                serie_node, serie, [
+                tuple(
+                    (self._x_ranges[i][j],
+                     v * (-1 if serie.index % 2 else 1)) for j in range(2))
+                for i, v in enumerate(serie.values)],
+                stack_vals)
+
+
+class Pyramid(HorizontalGraph, VerticalPyramid):
+    """Horizontal Pyramid graph"""

pygal/graph/radar.py

@@ -59,7 +59,7 @@ class Radar(Line):
             self.height - self.margin.y,
             self._box)
 
-    def _x_axis(self):
+    def _x_axis(self, draw_axes=True):
         if not self._x_labels:
             return
 
@@ -86,7 +86,7 @@ class Radar(Line):
             text.attrib['transform'] = 'rotate(%f %s)' % (
                 deg(angle), format_(pos_text))
 
-    def _y_axis(self):
+    def _y_axis(self, draw_axes=True):
         if not self._y_labels:
             return
 
@@ -124,15 +124,14 @@ class Radar(Line):
                     extended_vals, extended_x_pos, polar=True)
 
         self._box.margin *= 2
-        self._box.xmin = self._box.ymin = 0
-        self._box.xmax = self._box.ymax = self._rmax = max(self._values)
+        self._box.xmin = self._box.ymin = - self._max
+        self._box.xmax = self._box.ymax = self._rmax = self._max
 
         y_pos = compute_scale(
-            self._box.ymin, self._box.ymax, self.logarithmic, max_scale=8
+            0, self._box.ymax, self.logarithmic, max_scale=8
         ) if not self.y_labels else map(int, self.y_labels)
         self._x_labels = self.x_labels and zip(self.x_labels, x_pos)
         self._y_labels = zip(map(self._format, y_pos), y_pos)
-        self._box.xmin = self._box.ymin = - self._box.ymax
 
         self.x_pos = x_pos
         self._self_close = True

pygal/view.py

@@ -47,9 +47,11 @@ class Box(object):
     """Chart boundings"""
     margin = .02
 
-    def __init__(self):
-        self.xmin = self.ymin = 0
-        self.xmax = self.ymax = 1
+    def __init__(self, xmin=0, ymin=0, xmax=1, ymax=1):
+        self.xmin = xmin
+        self.ymin = ymin
+        self.xmax = xmax
+        self.ymax = ymax
 
     @property
     def width(self):