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# coding: utf-8
# /*##########################################################################
#
# Copyright (c) 2017-2019 European Synchrotron Radiation Facility
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# ###########################################################################*/
"""This module provides the :class:`Shape` item of the :class:`Plot`.
"""
__authors__ = ["T. Vincent"]
__license__ = "MIT"
__date__ = "21/12/2018"
import logging
import numpy
import six
from ... import colors
from .core import Item, ColorMixIn, FillMixIn, ItemChangedType, LineMixIn, YAxisMixIn
_logger = logging.getLogger(__name__)
# TODO probably make one class for each kind of shape
# TODO check fill:polygon/polyline + fill = duplicated
class Shape(Item, ColorMixIn, FillMixIn, LineMixIn):
"""Description of a shape item
:param str type_: The type of shape in:
'hline', 'polygon', 'rectangle', 'vline', 'polylines'
"""
def __init__(self, type_):
Item.__init__(self)
ColorMixIn.__init__(self)
FillMixIn.__init__(self)
LineMixIn.__init__(self)
self._overlay = False
assert type_ in ('hline', 'polygon', 'rectangle', 'vline', 'polylines')
self._type = type_
self._points = ()
self._lineBgColor = None
self._handle = None
def _addBackendRenderer(self, backend):
"""Update backend renderer"""
points = self.getPoints(copy=False)
x, y = points.T[0], points.T[1]
return backend.addItem(x,
y,
shape=self.getType(),
color=self.getColor(),
fill=self.isFill(),
overlay=self.isOverlay(),
z=self.getZValue(),
linestyle=self.getLineStyle(),
linewidth=self.getLineWidth(),
linebgcolor=self.getLineBgColor())
def isOverlay(self):
"""Return true if shape is drawn as an overlay
:rtype: bool
"""
return self._overlay
def setOverlay(self, overlay):
"""Set the overlay state of the shape
:param bool overlay: True to make it an overlay
"""
overlay = bool(overlay)
if overlay != self._overlay:
self._overlay = overlay
self._updated(ItemChangedType.OVERLAY)
def getType(self):
"""Returns the type of shape to draw.
One of: 'hline', 'polygon', 'rectangle', 'vline', 'polylines'
:rtype: str
"""
return self._type
def getPoints(self, copy=True):
"""Get the control points of the shape.
:param bool copy: True (Default) to get a copy,
False to use internal representation (do not modify!)
:return: Array of point coordinates
:rtype: numpy.ndarray with 2 dimensions
"""
return numpy.array(self._points, copy=copy)
def setPoints(self, points, copy=True):
"""Set the point coordinates
:param numpy.ndarray points: Array of point coordinates
:param bool copy: True (Default) to get a copy,
False to use internal representation (do not modify!)
:return:
"""
self._points = numpy.array(points, copy=copy)
self._updated(ItemChangedType.DATA)
def getLineBgColor(self):
"""Returns the RGBA color of the item
:rtype: 4-tuple of float in [0, 1] or array of colors
"""
return self._lineBgColor
def setLineBgColor(self, color, copy=True):
"""Set item color
:param color: color(s) to be used
:type color: str ("#RRGGBB") or (npoints, 4) unsigned byte array or
one of the predefined color names defined in colors.py
:param bool copy: True (Default) to get a copy,
False to use internal representation (do not modify!)
"""
if color is not None:
if isinstance(color, six.string_types):
color = colors.rgba(color)
else:
color = numpy.array(color, copy=copy)
# TODO more checks + improve color array support
if color.ndim == 1: # Single RGBA color
color = colors.rgba(color)
else: # Array of colors
assert color.ndim == 2
self._lineBgColor = color
self._updated(ItemChangedType.LINE_BG_COLOR)
class BoundingRect(Item, YAxisMixIn):
"""An invisible shape which enforce the plot view to display the defined
space on autoscale.
This item do not display anything. But if the visible property is true,
this bounding box is used by the plot, if not, the bounding box is
ignored. That's the default behaviour for plot items.
It can be applied on the "left" or "right" axes. Not both at the same time.
"""
def __init__(self):
Item.__init__(self)
YAxisMixIn.__init__(self)
self.__bounds = None
def _updated(self, event=None, checkVisibility=True):
if event in (ItemChangedType.YAXIS,
ItemChangedType.VISIBLE,
ItemChangedType.DATA):
# TODO hackish data range implementation
plot = self.getPlot()
if plot is not None:
plot._invalidateDataRange()
super(BoundingRect, self)._updated(event, checkVisibility)
def setBounds(self, rect):
"""Set the bounding box of this item in data coordinates
:param Union[None,List[float]] rect: (xmin, xmax, ymin, ymax) or None
"""
if rect is not None:
rect = float(rect[0]), float(rect[1]), float(rect[2]), float(rect[3])
assert rect[0] <= rect[1]
assert rect[2] <= rect[3]
if rect != self.__bounds:
self.__bounds = rect
self._updated(ItemChangedType.DATA)
def _getBounds(self):
plot = self.getPlot()
if plot is not None:
xPositive = plot.getXAxis()._isLogarithmic()
yPositive = plot.getYAxis()._isLogarithmic()
if xPositive or yPositive:
bounds = list(self.__bounds)
if xPositive and bounds[1] <= 0:
return None
if xPositive and bounds[0] <= 0:
bounds[0] = bounds[1]
if yPositive and bounds[3] <= 0:
return None
if yPositive and bounds[2] <= 0:
bounds[2] = bounds[3]
return tuple(bounds)
return self.__bounds
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