Andrew Charlwood
95 lines
3.2 KiB
Python
95 lines
3.2 KiB
Python
"""Callbacks for Trends view — directorate overview + drug drill-down."""
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from dash import Input, Output, State, no_update
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import plotly.graph_objects as go
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def register_trends_callbacks(app):
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"""Register Trends view callbacks."""
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def _trends_empty(message):
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"""Return a blank figure with a centered message."""
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fig = go.Figure()
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fig.update_layout(
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xaxis={"visible": False}, yaxis={"visible": False},
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plot_bgcolor="rgba(0,0,0,0)", paper_bgcolor="rgba(0,0,0,0)",
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margin={"t": 0, "l": 0, "r": 0, "b": 0}, height=400,
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annotations=[{
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"text": message, "xref": "paper", "yref": "paper",
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"x": 0.5, "y": 0.5, "showarrow": False,
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"font": {"size": 14, "color": "#768692",
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"family": "Source Sans 3, system-ui, sans-serif"},
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"xanchor": "center", "yanchor": "middle",
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}],
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)
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return fig
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# --- Landing / Detail toggle ---
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@app.callback(
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Output("trends-landing", "style"),
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Output("trends-detail", "style"),
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Output("trends-detail-title", "children"),
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Input("app-state", "data"),
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)
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def toggle_trends_subviews(app_state):
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"""Toggle between landing page and drug detail view."""
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if not app_state:
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return {}, {"display": "none"}, ""
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selected = app_state.get("selected_trends_directorate")
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show = {}
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hide = {"display": "none"}
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if selected:
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title = f"{selected} \u2014 Drug Trends"
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return hide, show, title
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else:
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return show, hide, ""
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# --- Directorate overview chart (landing page) ---
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@app.callback(
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Output("trends-overview-chart", "figure"),
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Input("app-state", "data"),
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Input("trends-view-metric-toggle", "value"),
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prevent_initial_call=True,
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)
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def render_trends_overview(app_state, metric):
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"""Render directorate-level trends line chart on the landing page."""
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if not app_state:
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return no_update
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active_view = app_state.get("active_view", "")
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if active_view != "trends":
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return no_update
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selected = app_state.get("selected_trends_directorate")
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if selected:
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return no_update
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metric = metric or "patients"
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from dash_app.data.queries import get_trend_data
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from visualization.plotly_generator import create_trend_figure
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try:
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data = get_trend_data(
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metric=metric,
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group_by="directory",
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)
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except Exception:
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return _trends_empty("Failed to load trend data.")
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if not data:
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return _trends_empty(
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"No trend data available.<br>"
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"Run <b>python -m cli.compute_trends</b> to generate."
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)
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metric_labels = {
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"patients": "Patients",
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"total_cost": "Cost per Patient",
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"cost_pp_pa": "Cost per Patient p.a.",
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}
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title = f"Directorate Trends \u2014 {metric_labels.get(metric, 'Patients')}"
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return create_trend_figure(data, title, metric)
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