def get_grouped_bar_chart_image(self, data, **kw):
""" Return image path of downloaded image from google charts api"""
if len(data['y']) == 0:
return ''
from pygooglechart import GroupedHorizontalBarChart, Axis
width = int(kw.get('width', 400))
height = int(kw.get('height', 250))
# How many members do we have in a group?
members_cnt = len(data['y'])
max_y = max(max(data['y'])) # since data['y'] is 2D
chart = GroupedHorizontalBarChart(width,
height,
x_range=[0, max_y],
y_range=[0, len(data['x'])])
# currently only 2 max members supported in a group
colours = ['4D89D9', 'C6D9FD']
for member in data['y']:
chart.add_data(member)
chart.set_colours(colours[:members_cnt])
chart.set_axis_labels(Axis.LEFT, data['x'])
bottom_labels = [
utils.intcomma(x) for x in range(0, max_y + 1, (max_y) / 5)
]
chart.set_axis_labels(Axis.BOTTOM, bottom_labels)
if kw.has_key('bar_spacing'):
chart.set_bar_spacing(kw['bar_spacing'])
if kw.has_key('group_spacing'):
chart.set_group_spacing(kw['group_spacing'])
if kw.has_key('bar_width'):
chart.set_bar_width(kw['bar_width'])
#Generate an hash from arguments
kw_hash = hash(tuple(sorted(kw.items())))
for i in range(members_cnt):
data['y'][i] = tuple(data['y'][i])
data_hash = hash(
tuple(sorted([(k, tuple(v)) for k, v in data.iteritems()])))
args_hash = str(kw_hash) + str(data_hash)
image_path = os.path.join(TARGET_DIR, "%s.png" % args_hash)
if bool(kw.get('refresh', False)) or args_hash not in self.charts:
#Get image from google chart api
chart.download(image_path)
if args_hash not in self.charts:
self.charts.append(args_hash)
self._p_changed = True
return image_path
def grouped_horizontal():
chart = GroupedHorizontalBarChart(settings['width'], settings['height'],
x_range=(0, 35))
chart.set_bar_width(5)
chart.set_bar_spacing(2)
chart.set_group_spacing(4)
chart.set_colours(['00ff00', 'ff0000'])
chart.add_data([1,2,3,4,5])
chart.add_data([1,4,9,16,25])
chart.download('bar-horizontal-grouped.png')
def grouped_horizontal():
chart = GroupedHorizontalBarChart(settings.width, settings.height,
x_range=(0, 35))
chart.set_bar_width(5)
chart.set_bar_spacing(2)
chart.set_group_spacing(4)
chart.set_colours(['00ff00', 'ff0000'])
chart.add_data([1,2,3,4,5])
chart.add_data([1,4,9,16,25])
chart.download('bar-horizontal-grouped.png')
def get_grouped_bar_chart_image(self, data, **kw):
""" Return image path of downloaded image from google charts api"""
if len(data['y']) == 0:
return ''
from pygooglechart import GroupedHorizontalBarChart, Axis
width = int(kw.get('width', 400))
height = int(kw.get('height', 250))
# How many members do we have in a group?
members_cnt = len(data['y'])
max_y = max(max(data['y'])) # since data['y'] is 2D
chart = GroupedHorizontalBarChart(width, height,
x_range=[0, max_y],
y_range=[0, len(data['x'])])
# currently only 2 max members supported in a group
colours = ['4D89D9', 'C6D9FD']
for member in data['y']:
chart.add_data(member)
chart.set_colours(colours[:members_cnt])
chart.set_axis_labels(Axis.LEFT, data['x'])
bottom_labels = [utils.intcomma(x) for x in range(0, max_y + 1, (max_y)/5)]
chart.set_axis_labels(Axis.BOTTOM, bottom_labels)
if kw.has_key('bar_spacing'):
chart.set_bar_spacing(kw['bar_spacing'])
if kw.has_key('group_spacing'):
chart.set_group_spacing(kw['group_spacing'])
if kw.has_key('bar_width'):
chart.set_bar_width(kw['bar_width'])
#Generate an hash from arguments
kw_hash = hash(tuple(sorted(kw.items())))
for i in range(members_cnt):
data['y'][i] = tuple(data['y'][i])
data_hash = hash(tuple(sorted([(k, tuple(v))
for k, v in data.iteritems()])))
args_hash = str(kw_hash) + str(data_hash)
image_path = os.path.join(TARGET_DIR, "%s.png" % args_hash)
if bool(kw.get('refresh', False)) or args_hash not in self.charts:
#Get image from google chart api
chart.download(image_path)
if args_hash not in self.charts:
self.charts.append(args_hash)
self._p_changed = True
return image_path
