Class Operations

hvplot/ui.py:423–480

class Operations(Controls):
    datashade = param.Boolean(
        default=False,
        doc="""
        Whether to apply rasterization and shading using datashader
        library returning an RGB object.""",
    )

    rasterize = param.Boolean(
        default=False,
        doc="""
        Whether to apply rasterization using the datashader library
        returning an aggregated Image.""",
    )

    aggregator = param.Selector(
        default=None,
        objects=AGGREGATORS,
        doc="""
        Aggregator to use when applying rasterize or datashade operation.""",
    )

    dynspread = param.Boolean(
        default=False,
        doc="""
        Allows plots generated with datashade=True or rasterize=True
        to increase the point size to make sparse regions more visible.""",
    )

    x_sampling = param.Number(
        default=None,
        doc="""
        Specifies the smallest allowed sampling interval along the x-axis.""",
    )

    y_sampling = param.Number(
        default=None,
        doc="""
        Specifies the smallest allowed sampling interval along the y-axis.""",
    )

    @param.depends('datashade', watch=True)
    def _toggle_rasterize(self):
        if self.datashade:
            self.rasterize = False

    @param.depends('rasterize', watch=True)
    def _toggle_datashade(self):
        if self.rasterize:
            self.datashade = False

    @param.depends('rasterize', 'datashade', watch=True, on_init=True)
    def _update_options(self):
        enabled = self.rasterize or self.datashade
        self.param.dynspread.constant = not enabled
        self.param.x_sampling.constant = not enabled
        self.param.y_sampling.constant = not enabled
        self.param.aggregator.constant = not enabled