Source code for holoviews.plotting.plotly.selection

from ...core.options import Store
from ...core.overlay import NdOverlay, Overlay
from ...selection import OverlaySelectionDisplay

[docs]class PlotlyOverlaySelectionDisplay(OverlaySelectionDisplay): """ Overlay selection display subclass for use with plotly backend """ def _build_element_layer(self, element, layer_color, layer_alpha, **opts): backend_options = Store.options(backend='plotly') style_options = backend_options[(type(element).name,)]['style'] allowed = style_options.allowed_keywords if 'selectedpoints' in allowed: shared_opts = dict(selectedpoints=False) else: shared_opts = {} merged_opts = dict(shared_opts) if 'opacity' in allowed: merged_opts['opacity'] = layer_alpha elif 'alpha' in allowed: merged_opts['alpha'] = layer_alpha if layer_color is not None: # set color merged_opts.update(self._get_color_kwarg(layer_color)) else: # Keep current color (including color from cycle) for color_prop in self.color_props: current_color = element.opts.get(group="style")[0].get(color_prop, None) if current_color: merged_opts.update({color_prop: current_color}) for opt in ('cmap', 'colorbar'): if opt in opts and opt in allowed: merged_opts[opt] = opts[opt] filtered = {k: v for k, v in merged_opts.items() if k in allowed} return element.opts(clone=True, backend='plotly', **filtered) def _style_region_element(self, region_element, unselected_color): from ..util import linear_gradient backend_options = Store.options(backend="plotly") el2_name = None if isinstance(region_element, NdOverlay): el1_name = type(region_element.last).name elif isinstance(region_element, Overlay): el1_name = type(region_element.get(0)).name el2_name = type(region_element.get(1)).name else: el1_name = type(region_element).name style_options = backend_options[(el1_name,)]['style'] allowed_keywords = style_options.allowed_keywords options = {} if el1_name != "Histogram": # Darken unselected color if unselected_color: region_color = linear_gradient(unselected_color, "#000000", 9)[3] if "Span" in el1_name: unselected_color = unselected_color or "#e6e9ec" region_color = linear_gradient(unselected_color, "#000000", 9)[1] if "line_width" in allowed_keywords: options["line_width"] = 1 else: # Darken unselected color slightly unselected_color = unselected_color or "#e6e9ec" region_color = linear_gradient(unselected_color, "#000000", 9)[1] if "color" in allowed_keywords and unselected_color: options["color"] = region_color elif "line_color" in allowed_keywords and unselected_color: options["line_color"] = region_color if "selectedpoints" in allowed_keywords: options["selectedpoints"] = False region = region_element.opts(el1_name, clone=True, backend='plotly', **options) if el2_name and el2_name == 'Path': region = region.opts(el2_name, backend='plotly', line_color='black') return region