from __future__ import absolute_import, division, unicode_literals
import numpy as np
from bokeh.models import WMTSTileSource, BBoxTileSource, QUADKEYTileSource, SaveTool
from ...core import util
from ...core.options import SkipRendering
from ...element.tiles import _ATTRIBUTIONS
from .element import ElementPlot
[docs]class TilePlot(ElementPlot):
style_opts = ['alpha', 'render_parents', 'level', 'smoothing', 'min_zoom', 'max_zoom']
selection_display = None
[docs] def get_extents(self, element, ranges, range_type='combined'):
extents = super(TilePlot, self).get_extents(element, ranges, range_type)
if (not self.overlaid and all(e is None or not np.isfinite(e) for e in extents)
and range_type in ('combined', 'data')):
x0, x1 = (-20037508.342789244, 20037508.342789244)
y0, y1 = (-20037508.342789255, 20037508.342789244)
global_extent = (x0, y0, x1, y1)
return global_extent
return extents
[docs] def get_data(self, element, ranges, style):
if not isinstance(element.data, util.basestring):
SkipRendering("WMTS element data must be a URL string, "
"bokeh cannot render %r" % element.data)
if '{Q}' in element.data:
tile_source = QUADKEYTileSource
elif all(kw in element.data for kw in ('{XMIN}', '{XMAX}', '{YMIN}', '{YMAX}')):
tile_source = BBoxTileSource
elif all(kw in element.data for kw in ('{X}', '{Y}', '{Z}')):
tile_source = WMTSTileSource
else:
raise ValueError('Tile source URL format not recognized. '
'Must contain {X}/{Y}/{Z}, {XMIN}/{XMAX}/{YMIN}/{YMAX} '
'or {Q} template strings.')
params = {'url': element.data}
for zoom in ('min_zoom', 'max_zoom'):
if zoom in style:
params[zoom] = style[zoom]
for key, attribution in _ATTRIBUTIONS.items():
if all(k in element.data for k in key):
params['attribution'] = attribution
return {}, {'tile_source': tile_source(**params)}, style
def _update_glyph(self, renderer, properties, mapping, glyph, source=None, data=None):
glyph.url = mapping['tile_source'].url
glyph.update(**{k: v for k, v in properties.items()
if k in glyph.properties()})
renderer.update(**{k: v for k, v in properties.items()
if k in renderer.properties()})
def _init_glyph(self, plot, mapping, properties):
"""
Returns a Bokeh glyph object.
"""
tile_source = mapping['tile_source']
level = properties.pop('level', 'glyph')
renderer = plot.add_tile(tile_source, level=level)
renderer.alpha = properties.get('alpha', 1)
# Remove save tool
plot.tools = [t for t in plot.tools if not isinstance(t, SaveTool)]
return renderer, tile_source
