def generate_word_chart(values):
start = values[0][0]
end = values[-1][0]
max_price = max([m[1] for m in values])
chart = open_flash_chart(bg_colour=BACKGROUND_COLOR)
main_plot = get_scatter_values(values, start, color=MAIN_LINE_COLOR)
chart.add_element(main_plot)
# 7 hour chart
hour_span = to_hour(end, start)
steps = 24
labels = []
for h in range(0, int(math.ceil(hour_span)), steps):
# print h
s = start + datetime.timedelta(hours=h)
text = localtime(s).strftime('%I:%M%p')
labels.append('')
xaxis = x_axis()
xaxis.min = 0
xaxis.max = hour_span
xaxis.offset = False
xaxis.steps = steps
xaxis.labels = {'labels': labels, 'steps': steps }
xaxis.colour = LIGHT_LINE_COLOR
xaxis.grid_colour = LIGHT_LINE_COLOR
chart.x_axis = xaxis
yaxis = y_axis()
yaxis.min = 0.01
yaxis.max = max_price * 1.25
steps = max_price / 10
# y = yaxis.min
# labels = []
# while y < yaxis.max:
# y += steps
# labels.append('$%0.2f' % y)
yaxis.steps = steps
yaxis.labels = None
yaxis.colour = LIGHT_LINE_COLOR
yaxis.grid_colour = LIGHT_LINE_COLOR
chart.y_axis = yaxis
chart['num_decimals'] = 2
chart['is_fixed_num_decimals_forced'] = True
return chart.render()
def get_scatter_values(values, start, color):
s = scatter_line(colour=color, dot_size=1)
scatter_values = []
for created_on, price in values:
x = to_hour(created_on, start)
y = price
tip = '%s: $%0.2f' % (localtime(created_on).strftime('%a, %I:%M%p').lower(),
price)
scatter_values.append(scatter_value(x=x, y=y, tip=tip))
s.values = scatter_values
return s
