""" Models (mostly base classes) for the various kinds of renderer
types that Bokeh supports.
"""
from __future__ import absolute_import
import logging
logger = logging.getLogger(__name__)
from ..model import Model
from ..core.enums import RenderLevel
from ..core.properties import abstract
from ..core.properties import String, Enum, Instance, Float, Bool, Override
from ..core import validation
from ..core.validation.errors import BAD_COLUMN_NAME, MISSING_GLYPH, NO_SOURCE_FOR_GLYPH
from .glyphs import Glyph
from .images import ImageSource
from .sources import DataSource, RemoteSource, ColumnDataSource
from .tiles import TileSource, WMTSTileSource
@abstract
[docs]class Renderer(Model):
"""An abstract base class for renderer types.
"""
level = Enum(RenderLevel, help="""
Specifies the level in which to paint this renderer.
""")
visible = Bool(default=True, help="""
Is the renderer visible. Default: True
""")
@abstract
[docs]class DataRenderer(Renderer):
""" An abstract base class for data renderer types (e.g. ``GlyphRenderer``, ``TileRenderer``).
"""
[docs]class TileRenderer(DataRenderer):
tile_source = Instance(TileSource, default=lambda: WMTSTileSource(), help="""
Local data source to use when rendering glyphs on the plot.
""")
alpha = Float(1.0, help="""
tile opacity 0.0 - 1.0
""")
x_range_name = String('default', help="""
A particular (named) x-range to use for computing screen
locations when rendering glyphs on the plot. If unset, use the
default x-range.
""")
y_range_name = String('default', help="""
A particular (named) y-range to use for computing screen
locations when rendering glyphs on the plot. If unset, use the
default y-range.
""")
level = Override(default="underlay")
render_parents = Bool(default=True, help="""
Flag enable/disable drawing of parent tiles while waiting for new tiles to arrive. Default value is True.
""")
[docs]class DynamicImageRenderer(DataRenderer):
image_source = Instance(ImageSource, help="""
Image source to use when rendering on the plot.
""")
alpha = Float(1.0, help="""
tile opacity 0.0 - 1.0
""")
level = Override(default="underlay")
render_parents = Bool(default=True, help="""
Flag enable/disable drawing of parent tiles while waiting for new tiles to arrive. Default value is True.
""")
[docs]class GlyphRenderer(DataRenderer):
"""
"""
@validation.error(MISSING_GLYPH)
def _check_missing_glyph(self):
if not self.glyph: return str(self)
@validation.error(NO_SOURCE_FOR_GLYPH)
def _check_no_source_for_glyph(self):
if not self.data_source: return str(self)
@validation.error(BAD_COLUMN_NAME)
def _check_bad_column_name(self):
if not self.glyph: return
if not self.data_source: return
if isinstance(self.data_source, RemoteSource): return
missing = set()
specs = self.glyph.dataspecs()
for name, item in self.glyph.properties_with_values(include_defaults=False).items():
if name not in specs: continue
if not isinstance(item, dict): continue
if not isinstance(self.data_source, ColumnDataSource): continue
if 'field' in item and item['field'] not in self.data_source.column_names:
missing.add(item['field'])
if missing:
return "%s [renderer: %s]" % (", ".join(sorted(missing)), self)
data_source = Instance(DataSource, help="""
Local data source to use when rendering glyphs on the plot.
""")
x_range_name = String('default', help="""
A particular (named) x-range to use for computing screen
locations when rendering glyphs on the plot. If unset, use the
default x-range.
""")
y_range_name = String('default', help="""
A particular (named) y-range to use for computing screen
locations when rendering glyphs on the plot. If unset, use the
default -range.
""")
glyph = Instance(Glyph, help="""
The glyph to render, in conjunction with the supplied data source
and ranges.
""")
selection_glyph = Instance(Glyph, help="""
An optional glyph used for selected points.
""")
nonselection_glyph = Instance(Glyph, help="""
An optional glyph used for explicitly non-selected points
(i.e., non-selected when there are other points that are selected,
but not when no points at all are selected.)
""")
hover_glyph = Instance(Glyph, help="""
An optional glyph used for inspected points, e.g., those that are
being hovered over by a HoverTool.
""")
level = Override(default="glyph")
@abstract
[docs]class GuideRenderer(Renderer):
""" A base class for all guide renderer types. ``GuideRenderer`` is
not generally useful to instantiate on its own.
"""
plot = Instance(".models.plots.Plot", help="""
The plot to which this guide renderer is attached.
""")
def __init__(self, **kwargs):
super(GuideRenderer, self).__init__(**kwargs)
if self.plot is not None:
if self not in self.plot.renderers:
self.plot.renderers.append(self)
level = Override(default="overlay")
