Add histogram plot

src/ai_dashboard/plot_plugin/histogram_plot.py

@@ -0,0 +1,60 @@
+"""This module is for plotting histograms in AI-Dashboard"""
+
+from typing import Any
+import logging
+
+import plotly.express as px
+from dash import html, dcc
+from dash.dependencies import Input, Output
+
+from ..base import BasePlotPlugin
+
+logger = logging.getLogger(__name__)
+
+
+class HistogramPlotPlugin(BasePlotPlugin):
+    """Plugin for plotting histograms in AI-Dashboard"""
+
+    name = "Histogram"
+
+    def dropdown(self, id_suffix: str, label: str) -> Any:
+        """Generate a dropdown for plot controls."""
+        cols = self.dataframe.columns.tolist()
+        return html.Div(
+            [
+                html.Label(label),
+                dcc.Dropdown(
+                    id={"type": "control", "plot": self.name, "axis": id_suffix},
+                    options=[{"label": c, "value": c} for c in cols],  # type: ignore
+                    value=cols[0],
+                    clearable=False,
+                    persistence=True,
+                    persistence_type="memory",
+                ),
+            ],
+            style={"width": "170px", "marginRight": "12px"},
+        )
+
+    def controls(self) -> Any:
+        """Generate plot controls."""
+        return html.Div(
+            [self.dropdown("x", "X-Axis")],
+            style={"display": "flex", "flexWrap": "wrap"},
+        )
+
+    def render(self, **kwargs: Any) -> Any:
+        """Render the histogram plot."""
+        x_axis = kwargs.get("x_axis")
+        fig = px.histogram(self.dataframe, x=x_axis, nbins=20, opacity=0.75)
+        return dcc.Graph(figure=fig)
+
+    def register_callbacks(self, app: Any) -> None:
+        """Register callbacks for interactivity."""
+
+        @app.callback(  # type: ignore
+            Output({"type": "plot-output", "plot": self.name}, "children"),
+            Input({"type": "control", "plot": self.name, "axis": "x"}, "value"),
+        )
+        def update_bar(x_axis: str) -> Any:
+            """Update the bar chart based on dropdown selections."""
+            return self.render(x_axis=x_axis)