# coding: utf-8 # /*########################################################################## # # Copyright (c) 2017-2020 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, DataItem, 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.addShape(x, y, shape=self.getType(), color=self.getColor(), fill=self.isFill(), overlay=self.isOverlay(), 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(DataItem, 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): DataItem.__init__(self) YAxisMixIn.__init__(self) self.__bounds = None 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._boundsChanged() self._updated(ItemChangedType.DATA) def _getBounds(self): if self.__bounds is None: return None 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 class _BaseExtent(DataItem): """Base class for :class:`XAxisExtent` and :class:`YAxisExtent`. :param str axis: Either 'x' or 'y'. """ def __init__(self, axis='x'): assert axis in ('x', 'y') DataItem.__init__(self) self.__axis = axis self.__range = 1., 100. def setRange(self, min_, max_): """Set the range of the extent of this item in data coordinates. :param float min_: Lower bound of the extent :param float max_: Upper bound of the extent :raises ValueError: If min > max or not finite bounds """ range_ = float(min_), float(max_) if not numpy.all(numpy.isfinite(range_)): raise ValueError("min_ and max_ must be finite numbers.") if range_[0] > range_[1]: raise ValueError("min_ must be lesser or equal to max_") if range_ != self.__range: self.__range = range_ self._boundsChanged() self._updated(ItemChangedType.DATA) def getRange(self): """Returns the range (min, max) of the extent in data coordinates. :rtype: List[float] """ return self.__range def _getBounds(self): min_, max_ = self.getRange() plot = self.getPlot() if plot is not None: axis = plot.getXAxis() if self.__axis == 'x' else plot.getYAxis() if axis._isLogarithmic(): if max_ <= 0: return None if min_ <= 0: min_ = max_ if self.__axis == 'x': return min_, max_, float('nan'), float('nan') else: return float('nan'), float('nan'), min_, max_ class XAxisExtent(_BaseExtent): """Invisible item with a settable horizontal data extent. This item do not display anything, but it behaves as a data item with a horizontal extent regarding plot data bounds, i.e., :meth:`PlotWidget.resetZoom` will take this horizontal extent into account. """ def __init__(self): _BaseExtent.__init__(self, axis='x') class YAxisExtent(_BaseExtent, YAxisMixIn): """Invisible item with a settable vertical data extent. This item do not display anything, but it behaves as a data item with a vertical extent regarding plot data bounds, i.e., :meth:`PlotWidget.resetZoom` will take this vertical extent into account. """ def __init__(self): _BaseExtent.__init__(self, axis='y') YAxisMixIn.__init__(self)