# coding: utf-8
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"""This module provides the :class:`Curve` item of the :class:`Plot`.
"""
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "24/04/2018"
import logging
import numpy
import six
from ....utils.deprecation import deprecated
from ... import colors
from .core import (PointsBase, LabelsMixIn, ColorMixIn, YAxisMixIn,
FillMixIn, LineMixIn, SymbolMixIn, ItemChangedType)
_logger = logging.getLogger(__name__)
[docs]class CurveStyle(object):
"""Object storing the style of a curve.
Set a value to None to use the default
:param color: Color
:param Union[str,None] linestyle: Style of the line
:param Union[float,None] linewidth: Width of the line
:param Union[str,None] symbol: Symbol for markers
:param Union[float,None] symbolsize: Size of the markers
"""
def __init__(self, color=None, linestyle=None, linewidth=None,
symbol=None, symbolsize=None):
if color is None:
self._color = None
else:
if isinstance(color, six.string_types):
color = colors.rgba(color)
else: # array-like expected
color = numpy.array(color, copy=False)
if color.ndim == 1: # Array is 1D, this is a single color
color = colors.rgba(color)
self._color = color
if linestyle is not None:
assert linestyle in LineMixIn.getSupportedLineStyles()
self._linestyle = linestyle
self._linewidth = None if linewidth is None else float(linewidth)
if symbol is not None:
assert symbol in SymbolMixIn.getSupportedSymbols()
self._symbol = symbol
self._symbolsize = None if symbolsize is None else float(symbolsize)
[docs] def getColor(self, copy=True):
"""Returns the color or None if not set.
:param bool copy: True to get a copy (default),
False to get internal representation (do not modify!)
:rtype: Union[List[float],None]
"""
if isinstance(self._color, numpy.ndarray):
return numpy.array(self._color, copy=copy)
else:
return self._color
[docs] def getLineStyle(self):
"""Return the type of the line or None if not set.
Type of line::
- ' ' no line
- '-' solid line
- '--' dashed line
- '-.' dash-dot line
- ':' dotted line
:rtype: Union[str,None]
"""
return self._linestyle
[docs] def getLineWidth(self):
"""Return the curve line width in pixels or None if not set.
:rtype: Union[float,None]
"""
return self._linewidth
[docs] def getSymbol(self):
"""Return the point marker type.
Marker type::
- 'o' circle
- '.' point
- ',' pixel
- '+' cross
- 'x' x-cross
- 'd' diamond
- 's' square
:rtype: Union[str,None]
"""
return self._symbol
[docs] def getSymbolSize(self):
"""Return the point marker size in points.
:rtype: Union[float,None]
"""
return self._symbolsize
def __eq__(self, other):
if isinstance(other, CurveStyle):
return (numpy.array_equal(self.getColor(), other.getColor()) and
self.getLineStyle() == other.getLineStyle() and
self.getLineWidth() == other.getLineWidth() and
self.getSymbol() == other.getSymbol() and
self.getSymbolSize() == other.getSymbolSize())
else:
return False
[docs]class Curve(PointsBase, ColorMixIn, YAxisMixIn, FillMixIn, LabelsMixIn, LineMixIn):
"""Description of a curve"""
_DEFAULT_Z_LAYER = 1
"""Default overlay layer for curves"""
_DEFAULT_SELECTABLE = True
"""Default selectable state for curves"""
_DEFAULT_LINEWIDTH = 1.
"""Default line width of the curve"""
_DEFAULT_LINESTYLE = '-'
"""Default line style of the curve"""
_DEFAULT_HIGHLIGHT_STYLE = CurveStyle(color='black')
"""Default highlight style of the item"""
def __init__(self):
PointsBase.__init__(self)
ColorMixIn.__init__(self)
YAxisMixIn.__init__(self)
FillMixIn.__init__(self)
LabelsMixIn.__init__(self)
LineMixIn.__init__(self)
self._highlightStyle = self._DEFAULT_HIGHLIGHT_STYLE
self._highlighted = False
self.sigItemChanged.connect(self.__itemChanged)
def __itemChanged(self, event):
if event == ItemChangedType.YAXIS:
# TODO hackish data range implementation
plot = self.getPlot()
if plot is not None:
plot._invalidateDataRange()
def _addBackendRenderer(self, backend):
"""Update backend renderer"""
# Filter-out values <= 0
xFiltered, yFiltered, xerror, yerror = self.getData(
copy=False, displayed=True)
if len(xFiltered) == 0 or not numpy.any(numpy.isfinite(xFiltered)):
return None # No data to display, do not add renderer to backend
style = self.getCurrentStyle()
return backend.addCurve(xFiltered, yFiltered, self.getLegend(),
color=style.getColor(),
symbol=style.getSymbol(),
linestyle=style.getLineStyle(),
linewidth=style.getLineWidth(),
yaxis=self.getYAxis(),
xerror=xerror,
yerror=yerror,
z=self.getZValue(),
selectable=self.isSelectable(),
fill=self.isFill(),
alpha=self.getAlpha(),
symbolsize=style.getSymbolSize())
def __getitem__(self, item):
"""Compatibility with PyMca and silx <= 0.4.0"""
if isinstance(item, slice):
return [self[index] for index in range(*item.indices(5))]
elif item == 0:
return self.getXData(copy=False)
elif item == 1:
return self.getYData(copy=False)
elif item == 2:
return self.getLegend()
elif item == 3:
info = self.getInfo(copy=False)
return {} if info is None else info
elif item == 4:
params = {
'info': self.getInfo(),
'color': self.getColor(),
'symbol': self.getSymbol(),
'linewidth': self.getLineWidth(),
'linestyle': self.getLineStyle(),
'xlabel': self.getXLabel(),
'ylabel': self.getYLabel(),
'yaxis': self.getYAxis(),
'xerror': self.getXErrorData(copy=False),
'yerror': self.getYErrorData(copy=False),
'z': self.getZValue(),
'selectable': self.isSelectable(),
'fill': self.isFill()
}
return params
else:
raise IndexError("Index out of range: %s", str(item))
def setVisible(self, visible):
"""Set visibility of item.
:param bool visible: True to display it, False otherwise
"""
visible = bool(visible)
# TODO hackish data range implementation
if self.isVisible() != visible:
plot = self.getPlot()
if plot is not None:
plot._invalidateDataRange()
super(Curve, self).setVisible(visible)
[docs] def isHighlighted(self):
"""Returns True if curve is highlighted.
:rtype: bool
"""
return self._highlighted
[docs] def setHighlighted(self, highlighted):
"""Set the highlight state of the curve
:param bool highlighted:
"""
highlighted = bool(highlighted)
if highlighted != self._highlighted:
self._highlighted = highlighted
# TODO inefficient: better to use backend's setCurveColor
self._updated(ItemChangedType.HIGHLIGHTED)
[docs] def getHighlightedStyle(self):
"""Returns the highlighted style in use
:rtype: CurveStyle
"""
return self._highlightStyle
[docs] def setHighlightedStyle(self, style):
"""Set the style to use for highlighting
:param CurveStyle style: New style to use
"""
previous = self.getHighlightedStyle()
if style != previous:
assert isinstance(style, CurveStyle)
self._highlightStyle = style
self._updated(ItemChangedType.HIGHLIGHTED_STYLE)
# Backward compatibility event
if previous.getColor() != style.getColor():
self._updated(ItemChangedType.HIGHLIGHTED_COLOR)
@deprecated(replacement='Curve.getHighlightedStyle().getColor()',
since_version='0.9.0')
def getHighlightedColor(self):
"""Returns the RGBA highlight color of the item
:rtype: 4-tuple of float in [0, 1]
"""
return self.getHighlightedStyle().getColor()
@deprecated(replacement='Curve.setHighlightedStyle()',
since_version='0.9.0')
def setHighlightedColor(self, color):
"""Set the color to use when highlighted
:param color: color(s) to be used for highlight
:type color: str ("#RRGGBB") or (npoints, 4) unsigned byte array or
one of the predefined color names defined in colors.py
"""
self.setHighlightedStyle(CurveStyle(color))
[docs] def getCurrentStyle(self):
"""Returns the current curve style.
Curve style depends on curve highlighting
:rtype: CurveStyle
"""
if self.isHighlighted():
style = self.getHighlightedStyle()
color = style.getColor()
linestyle = style.getLineStyle()
linewidth = style.getLineWidth()
symbol = style.getSymbol()
symbolsize = style.getSymbolSize()
return CurveStyle(
color=self.getColor() if color is None else color,
linestyle=self.getLineStyle() if linestyle is None else linestyle,
linewidth=self.getLineWidth() if linewidth is None else linewidth,
symbol=self.getSymbol() if symbol is None else symbol,
symbolsize=self.getSymbolSize() if symbolsize is None else symbolsize)
else:
return CurveStyle(color=self.getColor(),
linestyle=self.getLineStyle(),
linewidth=self.getLineWidth(),
symbol=self.getSymbol(),
symbolsize=self.getSymbolSize())
@deprecated(replacement='Curve.getCurrentStyle()',
since_version='0.9.0')
def getCurrentColor(self):
"""Returns the current color of the curve.
This color is either the color of the curve or the highlighted color,
depending on the highlight state.
:rtype: 4-tuple of float in [0, 1]
"""
return self.getCurrentStyle().getColor()
