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Fix issues with unwrapping longitudes in RangeXY stream #756

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2 changes: 1 addition & 1 deletion geoviews/plotting/bokeh/callbacks.py
Original file line number Diff line number Diff line change
Expand Up @@ -96,7 +96,7 @@ def project_ranges(cb, msg, attributes):
extents = x0, y0, x1, y1
x0, y0, x1, y1 = project_extents(extents, plot.projection,
plot.current_frame.crs)
if plot._unwrap_lons and -180 <= x0 < 0 or -180 <= x1 < 0:
if plot._unwrap_lons and (-180 <= x0 < 0 or -180 <= x1 < 0):
x0, x1 = x0 + 360, x1 + 360
if x0 > x1:
x0, x1 = x1, x0
Expand Down
22 changes: 15 additions & 7 deletions geoviews/plotting/bokeh/plot.py
Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
from bokeh.models.tools import BoxZoomTool, WheelZoomTool
from cartopy.crs import GOOGLE_MERCATOR, Mercator, PlateCarree, _CylindricalProjection
from holoviews.core.dimension import Dimension
from holoviews.core.util import dimension_sanitizer
from holoviews.core.util import dimension_sanitizer, match_spec
from holoviews.plotting.bokeh.element import ElementPlot, OverlayPlot as HvOverlayPlot

from ...element import Shape, _Element, is_geographic
Expand Down Expand Up @@ -104,28 +104,36 @@ def _update_ranges(self, element, ranges):
ax_range.end = mid + min_interval/2.
ax_range.min_interval = min_interval

def _set_unwrap_lons(self, element):
def _set_unwrap_lons(self, element, ranges):
if isinstance(self.geographic, _CylindricalProjection):
x1, x2 = element.range(0)
self._unwrap_lons = 0 <= x1 <= 360 and 0 <= x2 <= 360
xdim = element.get_dimension(0)
x_range = ranges.get(xdim.name, {}).get('data')
if x_range:
x0, x1 = x_range
else:
x0, x1 = element.range(0)
self._unwrap_lons = 0 <= x0 <= 360 and 180 <= x1 <= 360

def initialize_plot(self, ranges=None, plot=None, plots=None, source=None):
opts = {} if isinstance(self, HvOverlayPlot) else {'source': source}
fig = super().initialize_plot(ranges, plot, plots, **opts)
style_element = self.current_frame.last if self.batched else self.current_frame
el_ranges = match_spec(style_element, self.current_ranges)
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if self.geographic and self.show_bounds and not self.overlaid:
from . import GeoShapePlot
shape = Shape(self.projection.boundary, crs=self.projection).options(fill_alpha=0)
shapeplot = GeoShapePlot(shape, projection=self.projection,
overlaid=True, renderer=self.renderer)
shapeplot.geographic = False
shapeplot.initialize_plot(plot=fig)
self._set_unwrap_lons(self.current_frame)
self._set_unwrap_lons(style_element, el_ranges)
return fig

def update_frame(self, key, ranges=None, element=None):
if element is not None:
self._set_unwrap_lons(element)
super().update_frame(key, ranges=ranges, element=element)
style_element = self.current_frame.last if self.batched else self.current_frame
el_ranges = match_spec(style_element, self.current_ranges)
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self._set_unwrap_lons(style_element, el_ranges)

def _postprocess_hover(self, renderer, source):
super()._postprocess_hover(renderer, source)
Expand Down
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