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"""
ui/strip_chart.py — Config-driven live chart.
Consumes LayoutConfig from plot_window.
Supports stacked, side-by-side, and grid layouts.
X axis can be time or any channel (e.g. stress vs strain).
"""
import numpy as np
from typing import Dict, List, Optional, Tuple
from collections import deque
from PyQt6.QtWidgets import (
QWidget, QVBoxLayout, QHBoxLayout, QLabel,
QDoubleSpinBox, QPushButton, QSizePolicy,
)
from PyQt6.QtCore import Qt, pyqtSlot
from PyQt6.QtGui import QFont
try:
import pyqtgraph as pg
_HAS_PG = True
except ImportError:
_HAS_PG = False
_THEME_DARK = {"bg": "#0b0e13", "fg": "#475569", "grid_alpha": 0.12, "legend_brush": "#161d2e", "legend_pen": "#2a3558", "tick_color": "#64748b"}
_THEME_LIGHT = {"bg": "#ffffff", "fg": "#334155", "grid_alpha": 0.18, "legend_brush": "#f8fafc", "legend_pen": "#cbd5e1", "tick_color": "#64748b"}
_current_theme = _THEME_DARK
def set_chart_theme(theme: str):
global _current_theme
_current_theme = _THEME_DARK if theme == "dark" else _THEME_LIGHT
if _HAS_PG:
pg.setConfigOptions(antialias=True,
background=_current_theme["bg"],
foreground=_current_theme["fg"])
# Apply dark theme as default
if _HAS_PG:
pg.setConfigOptions(antialias=True, background=_THEME_DARK["bg"], foreground=_THEME_DARK["fg"])
from devices.device_registry import DeviceRegistry
from core.acquisition import AcquisitionEngine
from core.signal_processor import SignalProcessor
from ui.windows.plot_window import LayoutConfig, PaneSpec, TraceSpec, build_default_layout
_STYLES = {
"solid": Qt.PenStyle.SolidLine,
"dash": Qt.PenStyle.DashLine,
"dot": Qt.PenStyle.DotLine,
}
class StripChartWidget(QWidget):
def __init__(self, engine: AcquisitionEngine, registry: DeviceRegistry,
processor: SignalProcessor):
super().__init__()
self.engine = engine
self.registry = registry
self.processor = processor
self._paused = False
self._cfg: Optional[LayoutConfig] = None
# (dev_id, ch_id) → [{curve, plot, spec}]
self._curves: Dict[Tuple, List[dict]] = {}
self._build()
self.apply_layout(build_default_layout(registry, processor))
def _build(self):
lay = QVBoxLayout(self); lay.setContentsMargins(6,6,6,4); lay.setSpacing(4)
ctrl = QHBoxLayout()
ctrl.addWidget(QLabel("Window:"))
self._win = QDoubleSpinBox(); self._win.setRange(1,3600)
self._win.setSuffix(" s"); self._win.setValue(30.0)
self._win.valueChanged.connect(lambda v: self._cfg and setattr(self._cfg,"time_window_s",v))
ctrl.addWidget(self._win); ctrl.addStretch()
self._pause = QPushButton("⏸ Pause"); self._pause.setCheckable(True)
self._pause.setObjectName("pauseButton"); self._pause.toggled.connect(self._on_pause)
ctrl.addWidget(self._pause); lay.addLayout(ctrl)
if _HAS_PG:
self._gw = pg.GraphicsLayoutWidget()
self._gw.setSizePolicy(QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding)
lay.addWidget(self._gw)
else:
lay.addWidget(QLabel("⚠ pip install pyqtgraph",
alignment=Qt.AlignmentFlag.AlignCenter))
def apply_layout(self, cfg: LayoutConfig):
self._cfg = cfg
self._win.setValue(cfg.time_window_s)
if not _HAS_PG: return
self._gw.clear(); self._curves.clear()
if not cfg.panes: return
mf = QFont("IBM Plex Mono", 8)
n = len(cfg.panes)
# Determine row/col for each pane
if cfg.layout_mode == "free":
positions = [(spec.row or 0, spec.col or 0) for spec in cfg.panes]
elif cfg.layout_mode == "sidebyside":
positions = [(0, c) for c in range(n)]
elif cfg.layout_mode == "grid":
cols = max(1, cfg.grid_cols)
positions = [(i // cols, i % cols) for i in range(n)]
else: # stacked (legacy default)
positions = [(r, 0) for r in range(n)]
ref_plot = None
for idx, (spec, (row, col)) in enumerate(zip(cfg.panes, positions)):
plot = self._gw.addPlot(row=row, col=col)
plot.setLabel("left", spec.y_label or spec.title)
plot.setLabel("bottom", spec.x_label or "Elapsed (s)")
plot.showGrid(x=spec.grid, y=spec.grid, alpha=0.12)
plot.getAxis("left").setStyle(tickFont=mf)
plot.getAxis("bottom").setStyle(tickFont=mf)
# Hide bottom axis labels for non-bottom panes in stacked legacy mode
if cfg.layout_mode == "stacked" and idx < n - 1:
plot.getAxis("bottom").setStyle(showValues=False)
plot.getAxis("bottom").setHeight(0)
if cfg.link_x and ref_plot and spec.x_source == "time":
plot.setXLink(ref_plot)
if spec.x_source == "time":
ref_plot = plot
if cfg.show_legend:
t = _current_theme
plot.addLegend(offset=(5,5), labelTextColor=t["tick_color"],
brush=pg.mkBrush(t["legend_brush"]),
pen=pg.mkPen(t["legend_pen"]))
if not spec.y_auto:
plot.setYRange(spec.y_min, spec.y_max)
else:
plot.enableAutoRange(axis="y")
# Apply weight to row and column stretch
self._gw.ci.layout.setColumnStretchFactor(col, spec.weight)
self._gw.ci.layout.setRowStretchFactor(row, spec.weight)
for tr in spec.traces:
if not tr.visible: continue
pen = pg.mkPen(color=tr.color, width=tr.width,
style=_STYLES.get(tr.style, Qt.PenStyle.SolidLine))
curve = plot.plot([], [], pen=pen, name=tr.label or tr.channel_id)
key = (tr.device_id, tr.channel_id)
self._curves.setdefault(key, []).append(
{"curve": curve, "plot": plot, "spec": spec, "pane": spec})
def set_theme(self, theme: str):
"""Hot-swap pyqtgraph colours when the user changes theme."""
set_chart_theme(theme)
if _HAS_PG and self._gw is not None:
self._gw.setBackground(_current_theme["bg"])
# Rebuild plots so legend/grid colours update
self.apply_layout(self._cfg or build_default_layout(self.registry, self.processor))
def refresh(self):
self.apply_layout(self._cfg or build_default_layout(self.registry, self.processor))
def on_channel_enabled_changed(self, dev_id: str, ch_id: str, enabled: bool):
key = (dev_id, ch_id)
for e in self._curves.get(key, []):
e["curve"].setVisible(enabled)
@pyqtSlot(str, str, float, float)
def on_new_data(self, device_id: str, channel_id: str, ts: float, val: float):
if self._paused or not _HAS_PG or not self._cfg: return
key = (device_id, channel_id)
entries = self._curves.get(key)
if not entries: return
window = self._cfg.time_window_s
# Get Y data
if device_id == "derived":
bufs = self.processor.get_derived_buffer(channel_id)
if bufs is None or len(bufs[0]) < 2: return
ts_l = list(bufs[0]); vs_l = list(bufs[1])
else:
buf = self.engine.get_buffer(device_id, channel_id)
if buf is None or len(buf) < 2: return
ts_l, vs_l = buf.window(window)
if not ts_l: return
for e in entries:
spec = e["pane"]
# Determine X axis data
if spec.x_source == "time":
cutoff = ts_l[-1] - window if ts_l else 0
idx = next((i for i,t in enumerate(ts_l) if t >= cutoff), 0)
x_arr = np.array(ts_l[idx:], dtype=np.float64)
y_arr = np.array(vs_l[idx:], dtype=np.float64)
e["curve"].setData(x_arr, y_arr)
if x_arr.size:
e["plot"].setXRange(x_arr[-1]-window, x_arr[-1], padding=0)
else:
# X = another channel's processed values
parts = spec.x_source.split("/")
if len(parts) == 2:
x_dev, x_ch = parts
if x_dev == "derived":
xbufs = self.processor.get_derived_buffer(x_ch)
if xbufs and len(xbufs[0]) >= 2:
x_arr = np.array(list(xbufs[1]), dtype=np.float64)
y_arr = np.array(vs_l, dtype=np.float64)
mn = min(len(x_arr), len(y_arr))
e["curve"].setData(x_arr[-mn:], y_arr[-mn:])
else:
xbuf = self.engine.get_buffer(x_dev, x_ch)
if xbuf and len(xbuf) >= 2:
_, xvs = xbuf.all()
x_arr = np.array(xvs, dtype=np.float64)
y_arr = np.array(vs_l, dtype=np.float64)
mn = min(len(x_arr), len(y_arr))
e["curve"].setData(x_arr[-mn:], y_arr[-mn:])
if spec.y_auto:
e["plot"].enableAutoRange(axis="y")
def _on_pause(self, c: bool):
self._paused = c
self._pause.setText("▶ Resume" if c else "⏸ Pause")
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