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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# charts.py by:
# Agustin Zubiaga <aguzubiaga97@gmail.com>
# Gonzalo Odiard <godiard@gmail.com>
# Manuel QuiƱones <manuq@laptop.org>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import pycha.bar
import pycha.line
import pycha.pie
import cairo
import gobject
class Chart(gobject.GObject):
def __init__(self, type="vertical", width=600, height=460):
gobject.GObject.__init__(self)
self.dataSet = None
self.options = None
self.surface = None
self.type = type
self.width = width
self.height = height
def data_set(self, data):
"""Set chart data (dataSet)"""
self.dataSet = (
('Puntos', [(i, l[1]) for i, l in enumerate(data)]),
)
self.options = {
'legend': {'hide': True},
'axis': {
'x': {
'ticks': [dict(v=i, label=l[0]) for i,
l in enumerate(data)],
'label': 'X',
},
'y': {
'tickCount': 5,
'label': 'Y',
}
},
'background': {
'chartColor': '#FFFFFF',
'lineColor': '#d1e5ec'
},
'colorScheme': {
'name': 'gradient',
'args': {
'initialColor': 'blue',
},
},
}
def set_color_scheme(self, color='blue'):
"""Set the chart color scheme"""
self.options["colorScheme"]["args"] = {'initialColor': color}
def set_line_color(self, color='#d1e5ec'):
"""Set the chart line color"""
self.options["background"]["lineColor"] = color
def set_x_label(self, text="X"):
"""Set the X Label"""
self.options["axis"]["x"]["label"] = str(text)
def set_y_label(self, text="Y"):
"""Set the Y Label"""
self.options["axis"]["y"]["label"] = str(text)
def set_type(self, type="vertical"):
"""Set chart type (vertical, horizontal, line, pie)"""
self.type = type
def set_title(self, title="SimpleGraph Chart"):
"""Set the chart title"""
self.options["title"] = title
def render(self, sg=None):
"""Draw the chart
Use the self.surface variable for show the chart"""
self.surface = cairo.ImageSurface(cairo.FORMAT_ARGB32,
self.width,
self.height)
if self.type == "vbar":
chart = pycha.bar.VerticalBarChart(self.surface, self.options)
elif self.type == "hbar":
chart = pycha.bar.HorizontalBarChart(self.surface, self.options)
elif self.type == "line":
chart = pycha.line.LineChart(self.surface, self.options)
elif self.type == "pie":
self.options["legend"] = {"hide": "False"}
chart = pycha.pie.PieChart(self.surface, self.options)
self.dataSet = [(data[0],
[[0, data[1]]]) for data in sg.chart_data]
chart.addDataset(self.dataSet)
chart.render()
def as_png(self, file):
"""Save the chart as png image"""
self.surface.write_to_png(file)
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