""" Demonstrates plots sharing datasources, ranges, etc. """

# Major library imports
from numpy import arange
from scipy.special import jn

# Enthought library imports
from enable.api import Component, ComponentEditor
from traits.api import HasTraits, Instance
from traitsui.api import Item, Group, View

# Chaco imports
from chaco.api import HPlotContainer, ArrayPlotData, Plot
from chaco.tools.api import LineInspector, ZoomTool, PanTool


# ==============================================================================
# # Create the Chaco plot.
# ==============================================================================


def _create_plot_component():

    # Create the index
    numpoints = 100
    low = -5
    high = 15.0
    x = arange(low, high, (high - low) / numpoints)
    plotdata = ArrayPlotData(x=x, y1=jn(0, x), y2=jn(1, x))

    # Create the left plot
    left_plot = Plot(plotdata)
    left_plot.x_axis.title = "X"
    left_plot.y_axis.title = "j0(x)"
    renderer = left_plot.plot(
        ("x", "y1"), type="line", color="blue", width=2.0
    )[0]
    renderer.overlays.append(
        LineInspector(
            renderer, axis="value", write_metadata=True, is_listener=True
        )
    )
    renderer.overlays.append(
        LineInspector(
            renderer, axis="index", write_metadata=True, is_listener=True
        )
    )
    left_plot.overlays.append(ZoomTool(left_plot, tool_mode="range"))
    left_plot.tools.append(PanTool(left_plot))

    # Create the right plot
    right_plot = Plot(plotdata)
    right_plot.index_range = left_plot.index_range
    right_plot.orientation = "v"
    right_plot.x_axis.title = "j1(x)"
    right_plot.y_axis.title = "X"
    renderer2 = right_plot.plot(
        ("x", "y2"), type="line", color="red", width=2.0
    )[0]
    renderer2.index = renderer.index
    renderer2.overlays.append(
        LineInspector(renderer2, write_metadata=True, is_listener=True)
    )
    renderer2.overlays.append(
        LineInspector(renderer2, axis="value", is_listener=True)
    )
    right_plot.overlays.append(ZoomTool(right_plot, tool_mode="range"))
    right_plot.tools.append(PanTool(right_plot))

    container = HPlotContainer(background="lightgray")
    container.add(left_plot)
    container.add(right_plot)

    return container


# ==============================================================================
# Attributes to use for the plot view.
size = (750, 500)
title = "Two Plots"


# ==============================================================================
# # Demo class that is used by the demo.py application.
# ==============================================================================


class Demo(HasTraits):

    plot = Instance(Component)

    traits_view = View(
        Group(
            Item("plot", editor=ComponentEditor(size=size), show_label=False),
            orientation="vertical",
        ),
        resizable=True,
        title=title,
    )

    def _plot_default(self):
        return _create_plot_component()


demo = Demo()

if __name__ == "__main__":
    demo.configure_traits()