Remove DateY and replace it by real XY datetime, date, time and timedelta support. Introduce new XY configuration options: `xrange`, `x_value_formatter`.

CHANGELOG

@@ -1,4 +1,9 @@
-V 1.6.3 UNRELEASED
+V 2.0.0 UNRELEASED
+	Remove DateY and replace it by real XY datetime, date, time and timedelta support.
+	Introduce new XY configuration options: `xrange`, `x_value_formatter`
+	Rework the ghost mechanism to come back to a more object oriented behavior (WIP)
+
+V 1.6.3
 	Add show_x_labels option to remove them and the x axis.
 	Set print_values to False by default.
 	Fix secondary serie text values when None in data. (#192)

demo/moulinrouge/tests.py

@@ -3,7 +3,7 @@
 from pygal import (
     Bar, Gauge, Pyramid, Funnel, Dot, StackedBar, StackedLine, XY,
     CHARTS_BY_NAME, Config, Line, DateY, Worldmap, Histogram, Box,
-    FrenchMap_Departments, FrenchMap_Regions, Pie, Treemap)
+    FrenchMap_Departments, FrenchMap_Regions, Pie, Treemap, TimeLine, DateLine)
 from pygal.style import styles, Style, RotateStyle
 from pygal.colors import rotate
 from pygal.graph.frenchmap import DEPARTMENTS, REGIONS
@@ -58,7 +58,7 @@ def get_test_routes(app):
 
     @app.route('/test/xy_links')
     def test_xy_links():
-        xy = XY(style=styles['neon'])
+        xy = XY(style=styles['neon'], interpolate='cubic')
         xy.add('1234', [
             {'value': (10, 5),
              'label': 'Ten',
@@ -219,6 +219,12 @@ def get_test_routes(app):
         graph.title = '123456789 ' * 30
         return graph.render_response()
 
+    @app.route('/test/xy_single')
+    def test_xy_single():
+        graph = XY(interpolate='cubic')
+        graph.add('Single', [(1, 1)])
+        return graph.render_response()
+
     @app.route('/test/datey_single')
     def test_datey_single():
         graph = DateY(interpolate='cubic')
@@ -371,6 +377,19 @@ def get_test_routes(app):
         stacked.add('2', [4, 5, 6])
         return stacked.render_response()
 
+    @app.route('/test/dateline')
+    def test_dateline():
+        from datetime import date
+        datey = DateLine(show_dots=False)
+        datey.add('1', [
+            (datetime(2013, 1, 2), 300),
+            (datetime(2013, 1, 12), 412),
+            (datetime(2013, 2, 2), 823),
+            (datetime(2013, 2, 22), 672)
+        ])
+        datey.x_label_rotation = 25
+        return datey.render_response()
+
     @app.route('/test/datey')
     def test_datey():
         from datetime import datetime
@@ -384,6 +403,35 @@ def get_test_routes(app):
         datey.x_label_rotation = 25
         return datey.render_response()
 
+    @app.route('/test/datexy')
+    def test_datexy():
+        from datetime import datetime, date, timedelta
+        datey = DateY()
+        datey.add('1', [
+            (datetime(2011, 12, 21), 10),
+            (datetime(2014, 4, 8), 12),
+            (datetime(2010, 2, 28), 2)
+        ])
+        datey.add('2', map(
+            lambda t: (date.today() + timedelta(days=t[0]), t[1]),
+            [(12, 4), (219, 8), (928, 6)]))
+        datey.x_label_rotation = 25
+        return datey.render_response()
+
+    @app.route('/test/timexy')
+    def test_timexy():
+        from datetime import time
+        datey = TimeLine()
+        datey.add('1', [
+            (time(1, 12, 29), 2),
+            (time(21, 2, 29), 10),
+            (time(12, 30, 59), 7)
+        ])
+        datey.add('2',
+            [(time(12, 12, 12), 4), (time(), 8), (time(23, 59, 59), 6)])
+        datey.x_label_rotation = 25
+        return datey.render_response()
+
     @app.route('/test/worldmap')
     def test_worldmap():
         wmap = Worldmap(style=choice(list(styles.values())))

pygal/_compat.py

@@ -18,6 +18,7 @@
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
 import sys
 from collections import Iterable
+import time
 
 
 if sys.version_info[0] == 3:
@@ -60,3 +61,14 @@ def total_seconds(td):
             (td.days * 86400 + td.seconds) * 10 ** 6 + td.microseconds
         ) / 10 ** 6
     return td.total_seconds()
+
+
+def to_timestamp(x):
+    if hasattr(x, 'timestamp'):
+        return x.timestamp()
+    else:
+        if hasattr(x, 'utctimetuple'):
+            t = x.utctimetuple()
+        else:
+            t = x.timetuple()
+        return time.mktime(t)

pygal/adapters.py

@@ -20,8 +20,6 @@
 Value adapters to use when a chart doesn't accept all value types
 
 """
-import datetime
-from numbers import Number
 from decimal import Decimal
 
 
@@ -43,17 +41,6 @@ def none_to_zero(x):
     return x or 0
 
 
-def date(x):
-    # Make int work for date graphs by counting days number from now
-    if isinstance(x, Number):
-        try:
-            d = datetime.date.today() + datetime.timedelta(days=x)
-            return datetime.datetime.combine(d, datetime.time(0, 0, 0))
-        except OverflowError:
-            return None
-    return x
-
-
 def decimal_to_float(x):
     if isinstance(x, Decimal):
         return float(x)

pygal/config.py

@@ -232,7 +232,7 @@ class Config(CommonConfig):
 
     stack_from_top = Key(
         False, bool, "Look", "Stack from top to zero, this makes the stacked "
-                           "data match the legend order")
+        "data match the legend order")
 
     spacing = Key(
         10, int, "Look",
@@ -336,6 +336,11 @@ class Config(CommonConfig):
         False, bool, "Value", "Display values in human readable format",
         "(ie: 12.4M)")
 
+    x_value_formatter = Key(
+        None, type(lambda: 1), "Value",
+        "A function to convert abscissa numeric value to strings "
+        "(used in XY and Date charts)")
+
     value_formatter = Key(
         None, type(lambda: 1), "Value",
         "A function to convert numeric value to strings")
@@ -367,6 +372,11 @@ class Config(CommonConfig):
         None, list, "Value", "Explicitly specify min and max of values",
         "(ie: (0, 100))", int)
 
+    xrange = Key(
+        None, list, "Value", "Explicitly specify min and max of x values "
+        "(used in XY and Date charts)",
+        "(ie: (0, 100))", int)
+
     include_x_axis = Key(
         False, bool, "Value", "Always include x axis")
 

pygal/ghost.py

@@ -37,9 +37,20 @@ class ChartCollection(object):
     pass
 
 
-REAL_CHARTS = {}
+REAL_CHARTS = {
+    'DateY': 'pygal.graph.time.DateY',
+    'DateTimeLine': 'pygal.graph.time.DateTimeLine',
+    'DateLine': 'pygal.graph.time.DateLine',
+    'TimeLine': 'pygal.graph.time.TimeLine',
+    'TimeDeltaLine': 'pygal.graph.time.TimeDeltaLine'
+}
+
 for NAME in CHARTS_NAMES:
-    mod_name = 'pygal.graph.%s' % NAME.lower()
+    if NAME in REAL_CHARTS:
+        mod_name = 'pygal.graph.time'
+    else:
+        mod_name = 'pygal.graph.%s' % NAME.lower()
+
     __import__(mod_name)
     mod = sys.modules[mod_name]
     chart = getattr(mod, NAME)

pygal/graph/__init__.py

@@ -36,11 +36,15 @@ CHARTS_NAMES = [
     'VerticalPyramid',
     'Dot',
     'Gauge',
-    'DateY',
     'Worldmap',
     'SupranationalWorldmap',
     'Histogram',
     'Box',
     'FrenchMap',
-    'Treemap'
+    'Treemap',
+    'DateY',
+    'DateTimeLine',
+    'DateLine',
+    'TimeLine',
+    'TimeDeltaLine'
 ]

pygal/graph/base.py

@@ -69,6 +69,8 @@ class BaseGraph(object):
                  for serie in self.series for val in serie.safe_values]))
 
             self.zero = min(positive_values or (1,)) or 1
+        if self._len < 3:
+            self.interpolate = None
         self._draw()
         self.svg.pre_render()
 
@@ -76,6 +78,12 @@ class BaseGraph(object):
     def all_series(self):
         return self.series + self.secondary_series
 
+    @property
+    def _x_format(self):
+        """Return the value formatter for this graph"""
+        return self.config.x_value_formatter or (
+            humanize if self.human_readable else str)
+
     @property
     def _format(self):
         """Return the value formatter for this graph"""

pygal/graph/box.py

@@ -89,6 +89,11 @@ class Box(Graph):
         for serie in self.series:
             self._boxf(serie)
 
+    @property
+    def _len(self):
+        """Len is always 5 here"""
+        return 5
+
     def _boxf(self, serie):
         """
         For a specific series, draw the box plot.

pygal/graph/datey.py

@@ -1,147 +0,0 @@
-# -*- coding: utf-8 -*-
-# This file is proposed as a part of pygal
-# A python svg graph plotting library
-#
-# A python svg graph plotting library
-# Copyright © 2012 Snarkturne  (modified from Kozea XY class)
-#
-# 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/>.
-
-"""
-DateY graph
-
-Example :
-import pygal
-from datetime import datetime,timedelta
-
-def jour(n) :
-    return datetime(year=2014,month=1,day=1)+timedelta(days=n)
-
-x=(1,20,35,54,345,898)
-x=tuple(map(jour,x))
-x_label=(0,100,200,300,400,500,600,700,800,900,1000)
-x_label=map(jour,x_label)
-y=(1,3,4,2,3,1)
-graph=pygal.DateY(x_label_rotation=20)
-graph.x_label_format = "%Y-%m-%d"
-graph.x_labels = x_label
-graph.add("graph1",list(zip(x,y))+[None,None])
-graph.render_in_browser()
-"""
-
-from pygal._compat import total_seconds
-from pygal.adapters import date
-from pygal.util import compute_scale
-from pygal.graph.xy import XY
-import datetime
-
-
-class DateY(XY):
-    """ DateY Graph """
-    _offset = datetime.datetime(year=2000, month=1, day=1)
-    _adapters = [date]
-
-    def _todate(self, d):
-        """ Converts a number to a date """
-        currDateTime = self._offset + datetime.timedelta(seconds=d or 0)
-        return currDateTime.strftime(self.x_label_format)
-
-    def _tonumber(self, d):
-        """ Converts a date to a number """
-        if d is None:
-            return None
-        return total_seconds(d - self._offset)
-
-    def _get_value(self, values, i):
-        return 'x=%s, y=%s' % (
-            self._todate(values[i][0]), self._format(values[i][1]))
-
-    def _compute(self):
-        # Approximatively the same code as in XY.
-        # The only difference is the transformation of dates to numbers
-        # (beginning) and the reversed transformation to dates (end)
-        self._offset = min([val[0]
-                            for serie in self.series
-                            for val in serie.values
-                            if val[0] is not None]
-                           or [datetime.datetime.fromtimestamp(0)])
-        for serie in self.all_series:
-            serie.values = [(self._tonumber(v[0]), v[1]) for v in serie.values]
-
-        if self.xvals:
-            xmin = min(self.xvals)
-            xmax = max(self.xvals)
-            rng = (xmax - xmin)
-        else:
-            rng = None
-
-        if self.yvals:
-            ymin = self._min
-            ymax = self._max
-            if self.include_x_axis:
-                ymin = min(self._min or 0, 0)
-                ymax = max(self._max or 0, 0)
-
-        for serie in self.all_series:
-            serie.points = serie.values
-            if self.interpolate and rng:
-                vals = list(zip(*sorted(
-                    [t for t in serie.points if None not in t],
-                    key=lambda x: x[0])))
-                serie.interpolated = self._interpolate(vals[0], vals[1])
-
-        if self.interpolate and rng:
-            self.xvals = [val[0]
-                          for serie in self.all_series
-                          for val in serie.interpolated]
-            self.yvals = [val[1]
-                          for serie in self.all_series
-                          for val in serie.interpolated]
-
-            xmin = min(self.xvals)
-            xmax = max(self.xvals)
-            rng = (xmax - xmin)
-
-        # Calculate/prcoess the x_labels
-        if self.x_labels and all(
-                map(lambda x: isinstance(
-                    x, (datetime.datetime, datetime.date)), self.x_labels)):
-            # Process the given x_labels
-            x_labels_num = []
-            for label in self.x_labels:
-                x_labels_num.append(self._tonumber(label))
-            x_pos = x_labels_num
-
-            # Update the xmin/xmax to fit all of the x_labels and the data
-            xmin = min(xmin, min(x_pos))
-            xmax = max(xmax, max(x_pos))
-
-            self._box.xmin, self._box.xmax = xmin, xmax
-            self._box.ymin, self._box.ymax = ymin, ymax
-        else:
-            # Automatically generate the x_labels
-            if rng:
-                self._box.xmin, self._box.xmax = xmin, xmax
-                self._box.ymin, self._box.ymax = ymin, ymax
-
-            x_pos = compute_scale(
-                self._box.xmin, self._box.xmax, self.logarithmic,
-                self.order_min)
-
-        # Always auto-generate the y labels
-        y_pos = compute_scale(
-            self._box.ymin, self._box.ymax, self.logarithmic, self.order_min)
-
-        self._x_labels = list(zip(list(map(self._todate, x_pos)), x_pos))
-        self._y_labels = list(zip(list(map(self._format, y_pos)), y_pos))

pygal/graph/time.py

@@ -0,0 +1,108 @@
+# -*- coding: utf-8 -*-
+# This file is part of pygal
+#
+# A python svg graph plotting library
+# Copyright © 2012-2014 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/>.
+"""
+Various datetime line plot
+"""
+
+from pygal.graph.xy import XY
+from datetime import datetime, date, time, timedelta
+from pygal._compat import to_timestamp
+
+
+def datetime_to_timestamp(x):
+    if isinstance(x, datetime):
+        return to_timestamp(x)
+    return x
+
+
+def date_to_datetime(x):
+    if isinstance(x, date):
+        return datetime.combine(x, time())
+    return x
+
+
+def time_to_datetime(x):
+    if isinstance(x, time):
+        return datetime.combine(date(1970, 1, 1), x)
+    return x
+
+
+def timedelta_to_seconds(x):
+    if isinstance(x, timedelta):
+        return x.total_seconds()
+    return x
+
+
+class DateTimeLine(XY):
+    _x_adapters = [datetime_to_timestamp, date_to_datetime]
+
+    @property
+    def _x_format(self):
+        """Return the value formatter for this graph"""
+        def datetime_to_str(x):
+            dt = datetime.fromtimestamp(x)
+            if self.config.x_value_formatter:
+                return self.config.x_value_formatter(dt)
+            return dt.isoformat()
+        return datetime_to_str
+
+
+class DateLine(DateTimeLine):
+
+    @property
+    def _x_format(self):
+        """Return the value formatter for this graph"""
+        def date_to_str(x):
+            d = date.fromtimestamp(x)
+            if self.config.x_value_formatter:
+                return self.config.x_value_formatter(d)
+            return d.isoformat()
+        return date_to_str
+
+
+class TimeLine(DateTimeLine):
+    _x_adapters = [datetime_to_timestamp, time_to_datetime]
+
+    @property
+    def _x_format(self):
+        """Return the value formatter for this graph"""
+        def date_to_str(x):
+            t = datetime.fromtimestamp(x).time()
+            if self.config.x_value_formatter:
+                return self.config.x_value_formatter(t)
+            return t.isoformat()
+        return date_to_str
+
+
+class TimeDeltaLine(XY):
+    _x_adapters = [timedelta_to_seconds]
+
+    @property
+    def _x_format(self):
+        """Return the value formatter for this graph"""
+        def timedelta_to_str(x):
+            td = timedelta(seconds=x)
+            if self.config.x_value_formatter:
+                return self.config.x_value_formatter(td)
+            return str(td)
+
+        return timedelta_to_str
+
+# Old pygal compat
+DateY = DateTimeLine

pygal/graph/xy.py

@@ -22,13 +22,15 @@ XY Line graph
 """
 
 from __future__ import division
-from pygal.util import compute_scale, cached_property
+from functools import reduce
+from pygal.util import compute_scale, cached_property, compose
 from pygal.graph.line import Line
 
 
 class XY(Line):
     """XY Line graph"""
     _dual = True
+    _x_adapters = []
 
     @cached_property
     def xvals(self):
@@ -63,8 +65,17 @@ class XY(Line):
 
     def _compute(self):
         if self.xvals:
-            xmin = min(self.xvals)
+            if self.xrange:
-            xmax = max(self.xvals)
+                x_adapter = reduce(
+                    compose, self._x_adapters) if getattr(
+                        self, '_x_adapters', None) else None
+
+                xmin = x_adapter(self.xrange[0])
+                xmax = x_adapter(self.xrange[1])
+
+            else:
+                xmin = min(self.xvals)
+                xmax = max(self.xvals)
             xrng = (xmax - xmin)
         else:
             xrng = None
@@ -83,13 +94,13 @@ class XY(Line):
 
         for serie in self.all_series:
             serie.points = serie.values
-            if self.interpolate and xrng:
+            if self.interpolate:
                 vals = list(zip(*sorted(
                     filter(lambda t: None not in t,
                            serie.points), key=lambda x: x[0])))
                 serie.interpolated = self._interpolate(vals[0], vals[1])
 
-        if self.interpolate and xrng:
+        if self.interpolate:
             self.xvals = [val[0]
                           for serie in self.all_series
                           for val in serie.interpolated]
@@ -109,9 +120,10 @@ class XY(Line):
             self._box.ymin, self._box.ymax = ymin, ymax
 
         x_pos = compute_scale(
-            self._box.xmin, self._box.xmax, self.logarithmic, self.order_min)
+            self._box.xmin, self._box.xmax, self.logarithmic,
+            self.order_min)
         y_pos = compute_scale(
             self._box.ymin, self._box.ymax, self.logarithmic, self.order_min)
 
-        self._x_labels = list(zip(map(self._format, x_pos), x_pos))
+        self._x_labels = list(zip(map(self._x_format, x_pos), x_pos))
         self._y_labels = list(zip(map(self._format, y_pos), y_pos))

pygal/test/test_config.py

@@ -21,7 +21,8 @@ from pygal import (
     Line, Dot, Pie, Treemap, Radar, Config, Bar, Funnel, Worldmap,
     SupranationalWorldmap, Histogram, Gauge, Box, XY,
     Pyramid, DateY, HorizontalBar, HorizontalStackedBar,
-    FrenchMap_Regions, FrenchMap_Departments)
+    FrenchMap_Regions, FrenchMap_Departments,
+    DateTimeLine, TimeLine, DateLine, TimeDeltaLine)
 from pygal._compat import u
 from pygal.test.utils import texts
 from tempfile import NamedTemporaryFile
@@ -362,7 +363,8 @@ def test_x_label_major(Chart):
             Pie, Treemap, Funnel, Dot, Gauge, Worldmap,
             SupranationalWorldmap, Histogram, Box,
             FrenchMap_Regions, FrenchMap_Departments,
-            Pyramid, DateY):
+            Pyramid, DateY, DateTimeLine, TimeLine, DateLine,
+            TimeDeltaLine):
         return
     chart = Chart()
     chart.add('test', range(12))
@@ -407,7 +409,8 @@ def test_y_label_major(Chart):
             SupranationalWorldmap, Histogram, Box,
             FrenchMap_Regions, FrenchMap_Departments,
             HorizontalBar, HorizontalStackedBar,
-            Pyramid, DateY):
+            Pyramid, DateTimeLine, TimeLine, DateLine,
+            TimeDeltaLine, DateY):
         return
     chart = Chart()
     data = range(12)

pygal/test/test_date.py

@@ -16,49 +16,117 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
-from pygal import DateY
+from pygal import DateLine, TimeLine, DateTimeLine, TimeDeltaLine
 from pygal.test.utils import texts
-from datetime import datetime
+from datetime import datetime, date, time, timedelta
 
 
 def test_date():
-    datey = DateY(truncate_label=1000)
+    date_chart = DateLine(truncate_label=1000)
-    datey.add('dates', [
+    date_chart.add('dates', [
-        (datetime(2013, 1, 2), 300),
+        (date(2013, 1, 2), 300),
-        (datetime(2013, 1, 12), 412),
+        (date(2013, 1, 12), 412),
-        (datetime(2013, 2, 2), 823),
+        (date(2013, 2, 2), 823),
-        (datetime(2013, 2, 22), 672)
+        (date(2013, 2, 22), 672)
     ])
 
-    q = datey.render_pyquery()
+    q = date_chart.render_pyquery()
 
     assert list(
         map(lambda t: t.split(' ')[0],
             q(".axis.x text").map(texts))) == [
-        '2013-01-02',
+        '2013-01-12',
-        '2013-01-13',
+        '2013-01-24',
-        '2013-01-25',
+        '2013-02-04',
-        '2013-02-05',
+        '2013-02-16'
-        '2013-02-17'
     ]
 
-    datey.x_labels = [
-        datetime(2013, 1, 1),
-        datetime(2013, 2, 1),
-        datetime(2013, 3, 1)
-    ]
 
-    q = datey.render_pyquery()
+def test_time():
+    time_chart = TimeLine(truncate_label=1000)
+    time_chart.add('times', [
+        (time(1, 12, 29), 2),
+        (time(21, 2, 29), 10),
+        (time(12, 30, 59), 7)
+    ])
+
+    q = time_chart.render_pyquery()
+
     assert list(
         map(lambda t: t.split(' ')[0],
             q(".axis.x text").map(texts))) == [
-        '2013-01-01',
+                '03:46:40',
-        '2013-02-01',
+                '06:33:20',
-        '2013-03-01'
+                '09:20:00',
-    ]
+                '12:06:40',
+                '14:53:20',
+                '17:40:00',
+                '20:26:40'
+            ]
+
+
+def test_datetime():
+    datetime_chart = DateTimeLine(truncate_label=1000)
+    datetime_chart.add('datetimes', [
+        (datetime(2013, 1, 2, 1, 12, 29), 300),
+        (datetime(2013, 1, 12, 21, 2, 29), 412),
+        (datetime(2013, 2, 2, 12, 30, 59), 823),
+        (datetime(2013, 2, 22), 672)
+    ])
+
+    q = datetime_chart.render_pyquery()
+
+    assert list(
+        map(lambda t: t.split(' ')[0],
+            q(".axis.x text").map(texts))) == [
+                '2013-01-12T15:13:20',
+                '2013-01-24T05:00:00',
+                '2013-02-04T18:46:40',
+                '2013-02-16T08:33:20'
+            ]
+
+
+def test_timedelta():
+    timedelta_chart = TimeDeltaLine(truncate_label=1000)
+    timedelta_chart.add('timedeltas', [
+        (timedelta(seconds=1), 10),
+        (timedelta(weeks=1), 50),
+        (timedelta(hours=3, seconds=30), 3),
+        (timedelta(microseconds=12112), .3),
+    ])
+
+    q = timedelta_chart.render_pyquery()
+
+    assert list(
+        q(".axis.x text").map(texts)) == [
+            '1 day, 3:46:40',
+            '2 days, 7:33:20',
+            '3 days, 11:20:00',
+            '4 days, 15:06:40',
+            '5 days, 18:53:20',
+            '6 days, 22:40:00'
+        ]
 
 
-def test_date_overflow():
+def test_date_xrange():
-    datey = DateY(truncate_label=1000)
+    datey = DateLine(truncate_label=1000)
-    datey.add('dates', [1, 2, -1000000, 5, 100000000])
+    datey.add('dates', [
-    assert datey.render_pyquery()
+        (date(2013, 1, 2), 300),
+        (date(2013, 1, 12), 412),
+        (date(2013, 2, 2), 823),
+        (date(2013, 2, 22), 672)
+    ])
+
+    datey.xrange = (date(2013, 1, 1), date(2013, 3, 1))
+
+    q = datey.render_pyquery()
+    assert list(
+        map(lambda t: t.split(' ')[0],
+            q(".axis.x text").map(texts))) == [
+                '2013-01-01',
+                '2013-01-12',
+                '2013-01-24',
+                '2013-02-04',
+                '2013-02-16',
+                '2013-02-27'
+            ]

pygal/test/test_util.py

@@ -16,6 +16,7 @@
 #
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
+from datetime import time
 from pygal._compat import u
 from pygal.util import (
     round_to_int, round_to_float, _swap_curly, template, humanize,

pygal/util.py

@@ -27,7 +27,8 @@ from decimal import Decimal
 from math import floor, pi, log, log10, ceil
 from itertools import cycle
 from functools import reduce
-from pygal.adapters import not_zero, positive, decimal_to_float
+from pygal.adapters import (
+    not_zero, positive, decimal_to_float)
 ORDERS = u("yzafpnµm kMGTPEZY")
 
 
@@ -334,7 +335,7 @@ def prepare_values(raw, config, cls, offset=0):
     """Prepare the values to start with sane values"""
     from pygal.serie import Serie
     from pygal.config import SerieConfig
-    from pygal.graph.datey import DateY
+    from pygal.graph.time import DateY
     from pygal.graph.histogram import Histogram
     from pygal.graph.worldmap import Worldmap
     from pygal.graph.frenchmap import FrenchMapDepartments
@@ -357,6 +358,9 @@ def prepare_values(raw, config, cls, offset=0):
         adapters = adapters + [positive, not_zero]
     adapters = adapters + [decimal_to_float]
     adapter = reduce(compose, adapters) if not config.strict else ident
+    x_adapter = reduce(
+        compose, cls._x_adapters) if getattr(
+            cls, '_x_adapters', None) else None
     series = []
 
     raw = [(
@@ -404,13 +408,16 @@ def prepare_values(raw, config, cls, offset=0):
                     value = (None, None)
                 elif not is_list_like(value):
                     value = (value, config.zero)
-                if issubclass(cls, DateY) or issubclass(
+                if x_adapter:
+                    value = (x_adapter(value[0]), adapter(value[1]))
+                if issubclass(
                         cls, (Worldmap, FrenchMapDepartments)):
                     value = (adapter(value[0]), value[1])
                 else:
                     value = list(map(adapter, value))
             else:
                 value = adapter(value)
+
             values.append(value)
         serie_config = SerieConfig()
         serie_config(**config.to_dict())

pygal/view.py

@@ -201,8 +201,11 @@ class PolarLogView(View):
         if not hasattr(box, '_rmin') or not hasattr(box, '_rmax'):
             raise Exception(
                 'Box must be set with set_polar_box for polar charts')
+
         self.log10_rmax = log10(self.box._rmax)
         self.log10_rmin = log10(self.box._rmin)
+        if self.log10_rmin == self.log10_rmax:
+            self.log10_rmax = self.log10_rmin + 1
 
     def __call__(self, rhotheta):
         """Project rho and theta"""
@@ -257,10 +260,11 @@ class PolarThetaLogView(View):
                 'Box must be set with set_polar_box for polar charts')
         self.log10_tmax = log10(self.box._tmax) if self.box._tmax > 0 else 0
         self.log10_tmin = log10(self.box._tmin) if self.box._tmin > 0 else 0
+        if self.log10_tmin == self.log10_tmax:
+            self.log10_tmax = self.log10_tmin + 1
 
     def __call__(self, rhotheta):
         """Project rho and theta"""
-
         if None in rhotheta:
             return None, None
         rho, theta = rhotheta
@@ -294,6 +298,8 @@ class LogView(View):
         self.box = box
         self.log10_ymax = log10(self.box.ymax) if self.box.ymax > 0 else 0
         self.log10_ymin = log10(self.box.ymin) if self.box.ymin > 0 else 0
+        if self.log10_ymin == self.log10_ymax:
+            self.log10_ymax = self.log10_ymin + 1
         self.box.fix(False)
 
     def y(self, y):
@@ -347,6 +353,8 @@ class HorizontalLogView(XLogView):
         self.box = box
         self.log10_xmax = log10(self.box.ymax) if self.box.ymax > 0 else 0
         self.log10_xmin = log10(self.box.ymin) if self.box.ymin > 0 else 0
+        if self.log10_xmin == self.log10_xmax:
+            self.log10_xmax = self.log10_xmin + 1
         self.box.fix(False)
         self.box.swap()