Source code for pygal.graph.dual

# -*- coding: utf-8 -*-
# This file is part of pygal
# A python svg graph plotting library
# Copyright © 2012-2016 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 <>.

"""Dual chart base. Dual means a chart with 2 scaled axis like xy"""

from pygal._compat import is_str
from pygal.graph.graph import Graph
from pygal.util import compute_scale, cut

[docs]class Dual(Graph): _dual = True def _value_format(self, value): """ Format value for dual value display. """ return '%s: %s' % ( self._x_format(value[0]), self._y_format(value[1])) def _compute_x_labels(self): x_pos = compute_scale( self._box.xmin, self._box.xmax, self.logarithmic, self.order_min, self.min_scale, self.max_scale ) if self.x_labels: self._x_labels = [] for i, x_label in enumerate(self.x_labels): if isinstance(x_label, dict): pos = self._x_adapt(x_label.get('value')) title = x_label.get('label', self._x_format(pos)) elif is_str(x_label): pos = self._x_adapt(x_pos[i % len(x_pos)]) title = x_label else: pos = self._x_adapt(x_label) title = self._x_format(pos) self._x_labels.append((title, pos)) self._box.xmin = min(self._box.xmin, min(cut(self._x_labels, 1))) self._box.xmax = max(self._box.xmax, max(cut(self._x_labels, 1))) else: self._x_labels = list(zip(map(self._x_format, x_pos), x_pos)) def _compute_x_labels_major(self): # In case of dual, x labels must adapters and so majors too self.x_labels_major = self.x_labels_major and list( map(self._x_adapt, self.x_labels_major)) super(Dual, self)._compute_x_labels_major() def _get_x_label(self, i): """Convenience function to get the x_label of a value index""" return