def _get_bar_chart(width, height, data, background_color=None, colour=None):
data = sorted([(int(k), v) for (k,v) in data.items()])
min_ = min([x[1] for x in data])
max_ = max([x[1] for x in data])
chart = GroupedVerticalBarChart(width, height,
y_range=(min_, max_+30)) # add 30px for some extra space
chart.add_data([x[1] for x in data])
chart.set_axis_labels(pygooglechart.Axis.BOTTOM, [x[0] for x in data])
interval = (max_ - min_) / 10
if interval > 1000:
interval = 5000
elif interval > 500:
interval = 1000
elif interval > 100:
interval = 500
elif interval > 50:
interval = 100
else:
interval = 50
max_range = interval * (max_ / interval +1)
chart.set_axis_labels(pygooglechart.Axis.LEFT,
[str(x) for x in range(0, max_range, interval)])
if background_color:
chart.fill_solid(chart.BACKGROUND, background_color)
if colour:
chart.set_colours([colour])
return chart.get_url()
