72 lines
2.6 KiB
Python
72 lines
2.6 KiB
Python
# -*- coding: utf-8 -*-
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# This file is part of pygal
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#
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# A python svg graph plotting library
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# Copyright © 2012-2016 Kozea
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#
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# This library is free software: you can redistribute it and/or modify it under
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# the terms of the GNU Lesser General Public License as published by the Free
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# Software Foundation, either version 3 of the License, or (at your option) any
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# later version.
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#
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# This library is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with pygal. If not, see <http://www.gnu.org/licenses/>.
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"""Dual chart base. Dual means a chart with 2 scaled axis like xy"""
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from pygal._compat import is_str
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from pygal.graph.graph import Graph
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from pygal.util import compute_scale, cut
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class Dual(Graph):
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_dual = True
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def _value_format(self, value):
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"""
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Format value for dual value display.
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"""
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return '%s: %s' % (
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self._x_format(value[0]),
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self._y_format(value[1]))
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def _compute_x_labels(self):
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x_pos = compute_scale(
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self._box.xmin, self._box.xmax, self.logarithmic,
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self.order_min, self.min_scale, self.max_scale
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)
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if self.x_labels:
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self._x_labels = []
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for i, x_label in enumerate(self.x_labels):
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if isinstance(x_label, dict):
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pos = self._x_adapt(x_label.get('value'))
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title = x_label.get('label', self._x_format(pos))
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elif is_str(x_label):
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pos = self._x_adapt(x_pos[i % len(x_pos)])
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title = x_label
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else:
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pos = self._x_adapt(x_label)
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title = self._x_format(pos)
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self._x_labels.append((title, pos))
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self._box.xmin = min(self._box.xmin, min(cut(self._x_labels, 1)))
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self._box.xmax = max(self._box.xmax, max(cut(self._x_labels, 1)))
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else:
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self._x_labels = list(zip(map(self._x_format, x_pos), x_pos))
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def _compute_x_labels_major(self):
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# In case of dual, x labels must adapters and so majors too
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self.x_labels_major = self.x_labels_major and list(
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map(self._x_adapt, self.x_labels_major))
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super(Dual, self)._compute_x_labels_major()
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def _get_x_label(self, i):
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"""Convenience function to get the x_label of a value index"""
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return
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