tfaour
8ea1c53ec3
The weather widget's icons/layout are hand-drawn PIL primitives -- clean under quantization but flat, no gradients/shadows. Adds an opt-in render_style="modern" (current/daily modes only) that instead renders a Jinja2 template through a persistent headless-Chromium browser (app/html_render.py), following the approach of Tesserae, an open-source e-ink dashboard targeting this same panel family. Key design points: - The Chromium dependency (Playwright) is lazily imported only when a weather widget actually uses "modern" style, and the background browser itself only launches on first use -- every other widget type, and this one's own classic/hourly/multi_city paths, never pay for it. - No Frame-level dithering setting needed: html_render dithers its own rendered widget to exact palette colors (Bayer/ordered, not Floyd-Steinberg) before compositing, so the shared whole-canvas Floyd-Steinberg pass sees zero quantization error there and leaves it untouched -- same trick draw_text/hand-drawn icons already use. Floyd- Steinberg keeps working unchanged for photos and every other widget. - A "Load calibrated Spectra 6 preset" button in Advanced configuration offers a community-measured palette (data ported from paperlesspaper/epdoptimize, Apache 2.0) as an alternative starting point to the existing idealized DEFAULT_PALETTE_RGB -- fills the existing palette table, doesn't save by itself. Known open risk, not resolved here: a headless Chromium binary is far larger than the ~100MB single-layer limit that already forced this project's pip/npm installs into split layers, and (unlike those) is a single ~180MB file that can't be split across layers by ordinary Dockerfile restructuring. Flagged prominently in server/Dockerfile and docs/widgets.md -- treat this render style as experimental/local-only until that's resolved.
56 lines
2.4 KiB
Python
56 lines
2.4 KiB
Python
"""Weather widget: one of four display modes (see models.
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WeatherWidgetConfig) backed by a pluggable provider (app/weather/'s
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PROVIDERS registry -- Open-Meteo or NWS) and drawn by app/weather_render.
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py's build() dispatch -- or, for "current"/"daily" modes with
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render_style="modern", by app/html_render.py's Jinja2/headless-Chromium
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renderer instead (experimental; hourly/multi_city always render classic
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regardless of render_style, see html_render's module docstring). No real
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"next"/"back" concept (same as whiteboard) -- a single "check now"
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action forces a re-fetch bypassing the normal throttle."""
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from __future__ import annotations
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from PIL import Image
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from sqlalchemy.orm import Session
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from .. import weather_render
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from ..models import Frame, WeatherWidgetConfig, Widget
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from ..routers.common import get_or_refresh_weather_widget_data
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from ._shared import placeholder_image
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ACTION_LABELS = {"check_now": "Check for updates"}
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def render(db: Session, frame: Frame, widget: Widget, target_w: int, target_h: int,
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is_normal_wake: bool = True) -> Image.Image:
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"""is_normal_wake is unused here -- see app/widgets/photos.py's
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identical note; every widget type's render() shares one call
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signature regardless of which ones actually care."""
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cfg = db.get(WeatherWidgetConfig, widget.id)
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data = get_or_refresh_weather_widget_data(db, frame, widget)
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if data is None:
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return placeholder_image(target_w, target_h, ["Weather widget", "not configured yet"])
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if cfg.render_style == "modern" and cfg.mode in ("current", "daily"):
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# Local import: html_render pulls in Playwright, a real headless-
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# Chromium dependency -- every other widget type, and this one's
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# own classic/hourly/multi_city paths, should never pay for it
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# (same reasoning as image_pipeline.render_placeholder's local
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# `import qrcode`).
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from .. import html_render
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return html_render.build(cfg.mode, data, target_w, target_h, frame.palette_rgb, cfg.units,
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city_label=cfg.city_label or "")
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return weather_render.build(
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cfg.mode, data, target_w, target_h, frame.palette_rgb, cfg.units,
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city_label=cfg.city_label or "", interval_hours=cfg.hourly_interval_hours,
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)
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def _check_now(db: Session, frame: Frame, widget: Widget) -> None:
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get_or_refresh_weather_widget_data(db, frame, widget, force=True)
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ACTIONS = {"check_now": _check_now}
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