Source code for holoviews.plotting.bokeh.path

from __future__ import absolute_import, division, unicode_literals

from collections import defaultdict

import param
import numpy as np

from ...core import util
from ...element import Polygons
from ...util.transform import dim
from .callbacks import PolyDrawCallback, PolyEditCallback
from .element import ColorbarPlot, LegendPlot, OverlayPlot
from .selection import BokehOverlaySelectionDisplay
from .styles import (
    expand_batched_style, base_properties, line_properties, fill_properties,
    mpl_to_bokeh, validate
)
from .util import bokeh_version, multi_polygons_data


[docs]class PathPlot(LegendPlot, ColorbarPlot): selected = param.List(default=None, doc=""" The current selection as a list of integers corresponding to the selected items.""") show_legend = param.Boolean(default=False, doc=""" Whether to show legend for the plot.""") # Deprecated options color_index = param.ClassSelector(default=None, class_=(util.basestring, int), allow_None=True, doc=""" Deprecated in favor of color style mapping, e.g. `color=dim('color')`""") style_opts = base_properties + line_properties + ['cmap'] _plot_methods = dict(single='multi_line', batched='multi_line') _mapping = dict(xs='xs', ys='ys') _nonvectorized_styles = base_properties + ['cmap'] _batched_style_opts = line_properties def _hover_opts(self, element): cdim = element.get_dimension(self.color_index) if self.batched: dims = list(self.hmap.last.kdims)+self.hmap.last.last.vdims else: dims = list(self.overlay_dims.keys())+self.hmap.last.vdims if cdim not in dims and cdim is not None: dims.append(cdim) return dims, {} def _get_hover_data(self, data, element): """ Initializes hover data based on Element dimension values. """ if 'hover' not in self.handles or self.static_source: return for k, v in self.overlay_dims.items(): dim = util.dimension_sanitizer(k.name) if dim not in data: data[dim] = [v for _ in range(len(list(data.values())[0]))]
[docs] def get_data(self, element, ranges, style): color = style.get('color', None) cdim = None if isinstance(color, util.basestring) and not validate('color', color): cdim = element.get_dimension(color) elif self.color_index is not None: cdim = element.get_dimension(self.color_index) scalar = element.interface.isunique(element, cdim, per_geom=True) if cdim else False style_mapping = { (s, v) for s, v in style.items() if (s not in self._nonvectorized_styles) and ((isinstance(v, util.basestring) and v in element) or isinstance(v, dim)) and not (not isinstance(v, dim) and v == color and s == 'color')} mapping = dict(self._mapping) if (not cdim or scalar) and not style_mapping and 'hover' not in self.handles: if self.static_source: data = {} else: paths = element.split(datatype='columns', dimensions=element.kdims) xs, ys = ([path[kd.name] for path in paths] for kd in element.kdims) if self.invert_axes: xs, ys = ys, xs data = dict(xs=xs, ys=ys) return data, mapping, style hover = 'hover' in self.handles vals = defaultdict(list) if hover: vals.update({util.dimension_sanitizer(vd.name): [] for vd in element.vdims}) if cdim and self.color_index is not None: dim_name = util.dimension_sanitizer(cdim.name) cmapper = self._get_colormapper(cdim, element, ranges, style) mapping['line_color'] = {'field': dim_name, 'transform': cmapper} vals[dim_name] = [] xpaths, ypaths = [], [] for path in element.split(): if cdim and self.color_index is not None: scalar = path.interface.isunique(path, cdim, per_geom=True) cvals = path.dimension_values(cdim, not scalar) vals[dim_name].append(cvals[:-1]) cols = path.columns(path.kdims) xs, ys = (cols[kd.name] for kd in element.kdims) alen = len(xs) xpaths += [xs[s1:s2+1] for (s1, s2) in zip(range(alen-1), range(1, alen+1))] ypaths += [ys[s1:s2+1] for (s1, s2) in zip(range(alen-1), range(1, alen+1))] if not hover: continue for vd in element.vdims: if vd == cdim: continue values = path.dimension_values(vd)[:-1] vd_name = util.dimension_sanitizer(vd.name) vals[vd_name].append(values) values = {d: np.concatenate(vs) if len(vs) else [] for d, vs in vals.items()} if self.invert_axes: xpaths, ypaths = ypaths, xpaths data = dict(xs=xpaths, ys=ypaths, **values) self._get_hover_data(data, element) return data, mapping, style
def get_batched_data(self, element, ranges=None): data = defaultdict(list) zorders = self._updated_zorders(element) for (key, el), zorder in zip(element.data.items(), zorders): el_opts = self.lookup_options(el, 'plot').options self.param.set_param(**{k: v for k, v in el_opts.items() if k not in OverlayPlot._propagate_options}) style = self.lookup_options(el, 'style') style = style.max_cycles(len(self.ordering))[zorder] self.overlay_dims = dict(zip(element.kdims, key)) eldata, elmapping, style = self.get_data(el, ranges, style) for k, eld in eldata.items(): data[k].extend(eld) # Skip if data is empty if not eldata: continue # Apply static styles nvals = len(list(eldata.values())[0]) sdata, smapping = expand_batched_style(style, self._batched_style_opts, elmapping, nvals) elmapping.update({k: v for k, v in smapping.items() if k not in elmapping}) for k, v in sdata.items(): data[k].extend(list(v)) return data, elmapping, style
[docs]class ContourPlot(PathPlot): selected = param.List(default=None, doc=""" The current selection as a list of integers corresponding to the selected items.""") show_legend = param.Boolean(default=False, doc=""" Whether to show legend for the plot.""") # Deprecated options color_index = param.ClassSelector(default=0, class_=(util.basestring, int), allow_None=True, doc=""" Deprecated in favor of color style mapping, e.g. `color=dim('color')`""") _color_style = 'line_color' _nonvectorized_styles = base_properties + ['cmap'] def __init__(self, *args, **params): super(ContourPlot, self).__init__(*args, **params) self._has_holes = None def _hover_opts(self, element): if self.batched: dims = list(self.hmap.last.kdims)+self.hmap.last.last.vdims else: dims = list(self.overlay_dims.keys())+self.hmap.last.vdims return dims, {} def _get_hover_data(self, data, element): """ Initializes hover data based on Element dimension values. If empty initializes with no data. """ if 'hover' not in self.handles or self.static_source: return interface = element.interface scalar_kwargs = {'per_geom': True} if interface.multi else {} npath = len([vs for vs in data.values()][0]) for d in element.vdims: dim = util.dimension_sanitizer(d.name) if dim not in data: if element.level is not None: data[dim] = np.full(npath, element.level) elif interface.isunique(element, d, **scalar_kwargs): data[dim] = element.dimension_values(d, expanded=False) else: data[dim] = element.split(datatype='array', dimensions=[d]) for k, v in self.overlay_dims.items(): dim = util.dimension_sanitizer(k.name) if dim not in data: data[dim] = [v for _ in range(len(list(data.values())[0]))]
[docs] def get_data(self, element, ranges, style): if self._has_holes is None: draw_callbacks = any(isinstance(cb, (PolyDrawCallback, PolyEditCallback)) for cb in self.callbacks) has_holes = (isinstance(element, Polygons) and not draw_callbacks) self._has_holes = has_holes else: has_holes = self._has_holes if not element.interface.multi: element = element.clone([element.data], datatype=type(element).datatype) if self.static_source: data = dict() xs = self.handles['cds'].data['xs'] else: if has_holes: xs, ys = multi_polygons_data(element) else: xs, ys = (list(element.dimension_values(kd, expanded=False)) for kd in element.kdims) if self.invert_axes: xs, ys = ys, xs data = dict(xs=xs, ys=ys) mapping = dict(self._mapping) self._get_hover_data(data, element) color, fill_color = style.get('color'), style.get('fill_color') if (((isinstance(color, dim) and color.applies(element)) or color in element) or (isinstance(fill_color, dim) and fill_color.applies(element)) or fill_color in element): cdim = None elif None not in [element.level, self.color_index] and element.vdims: cdim = element.vdims[0] else: cidx = self.color_index+2 if isinstance(self.color_index, int) else self.color_index cdim = element.get_dimension(cidx) if cdim is None: return data, mapping, style ncontours = len(xs) dim_name = util.dimension_sanitizer(cdim.name) if element.level is not None: values = np.full(ncontours, float(element.level)) else: values = element.dimension_values(cdim, expanded=False) data[dim_name] = values factors = None if cdim.name in ranges and 'factors' in ranges[cdim.name]: factors = ranges[cdim.name]['factors'] elif values.dtype.kind in 'SUO' and len(values): if isinstance(values[0], np.ndarray): values = np.concatenate(values) factors = util.unique_array(values) cmapper = self._get_colormapper(cdim, element, ranges, style, factors) mapping[self._color_style] = {'field': dim_name, 'transform': cmapper} if self.show_legend: legend_prop = 'legend_field' if bokeh_version >= '1.3.5' else 'legend' mapping[legend_prop] = dim_name return data, mapping, style
def _init_glyph(self, plot, mapping, properties): """ Returns a Bokeh glyph object. """ plot_method = properties.pop('plot_method', None) properties = mpl_to_bokeh(properties) data = dict(properties, **mapping) if self._has_holes: plot_method = 'multi_polygons' elif plot_method is None: plot_method = self._plot_methods.get('single') renderer = getattr(plot, plot_method)(**data) if self.colorbar: for k, v in list(self.handles.items()): if not k.endswith('color_mapper'): continue self._draw_colorbar(plot, v, k[:-12]) return renderer, renderer.glyph
[docs]class PolygonPlot(ContourPlot): style_opts = base_properties + line_properties + fill_properties + ['cmap'] _plot_methods = dict(single='patches', batched='patches') _batched_style_opts = line_properties + fill_properties _color_style = 'fill_color' selection_display = BokehOverlaySelectionDisplay()