diff options
Diffstat (limited to 'silx/gui/plot/items/histogram.py')
| -rw-r--r-- | silx/gui/plot/items/histogram.py | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/silx/gui/plot/items/histogram.py b/silx/gui/plot/items/histogram.py index ad89677..3545345 100644 --- a/silx/gui/plot/items/histogram.py +++ b/silx/gui/plot/items/histogram.py @@ -29,7 +29,6 @@ __authors__ = ["H. Payno", "T. Vincent"] __license__ = "MIT" __date__ = "27/06/2017" - import logging import numpy @@ -37,7 +36,6 @@ import numpy from .core import (Item, AlphaMixIn, ColorMixIn, FillMixIn, LineMixIn, YAxisMixIn, ItemChangedType) - _logger = logging.getLogger(__name__) @@ -290,5 +288,40 @@ class Histogram(Item, AlphaMixIn, ColorMixIn, FillMixIn, self._histogram = histogram self._edges = edges + self._alignement = align self._updated(ItemChangedType.DATA) + + def getAlignment(self): + """ + + :return: histogram alignement. Value in ('center', 'left', 'right'). + """ + return self._alignement + + def _revertComputeEdges(self, x, histogramType): + """Compute the edges from a set of xs and a rule to generate the edges + + :param x: the x value of the curve to transform into an histogram + :param histogramType: the type of histogram we wan't to generate. + This define the way to center the histogram values compared to the + curve value. Possible values can be:: + + - 'left' + - 'right' + - 'center' + + :return: the edges for the given x and the histogramType + """ + # for now we consider that the spaces between xs are constant + edges = x.copy() + if histogramType is 'left': + return edges[1:] + if histogramType is 'center': + edges = (edges[1:] + edges[:-1]) / 2.0 + if histogramType is 'right': + width = 1 + if len(x) > 1: + width = x[-1] + x[-2] + edges = edges[:-1] + return edges |