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"""
ui/strip_chart.py
Live scrolling strip chart. One pyqtgraph plot per device,
all time-axes linked. Per-channel colored traces with legend.
"""
import numpy as np
from typing import Dict
from PyQt6.QtWidgets import (
QWidget, QVBoxLayout, QHBoxLayout, QLabel,
QDoubleSpinBox, QPushButton, QSizePolicy, QComboBox,
)
from PyQt6.QtCore import Qt, pyqtSlot
try:
import pyqtgraph as pg
pg.setConfigOptions(antialias=True, background="#0b0e13", foreground="#475569")
_HAS_PG = True
except ImportError:
_HAS_PG = False
from devices.device_registry import DeviceRegistry
from core.acquisition import AcquisitionEngine
class StripChartWidget(QWidget):
def __init__(self, engine: AcquisitionEngine, registry: DeviceRegistry):
super().__init__()
self.engine = engine
self.registry = registry
self._window = 30.0
self._paused = False
self._plots: Dict[str, Dict] = {} # dev_id -> {ch_id -> {curve, plot}}
self._build()
self.refresh()
# ── Build ────────────────────────────────────────────────────────────
def _build(self):
layout = QVBoxLayout(self)
layout.setContentsMargins(6, 6, 6, 4)
layout.setSpacing(4)
# Control bar
ctrl = QHBoxLayout()
ctrl.addWidget(QLabel("Window:"))
self._win_spin = QDoubleSpinBox()
self._win_spin.setRange(1.0, 3600.0)
self._win_spin.setValue(self._window)
self._win_spin.setSuffix(" s")
self._win_spin.valueChanged.connect(self._on_window_changed)
ctrl.addWidget(self._win_spin)
ctrl.addSpacing(16)
ctrl.addWidget(QLabel("Y-Scale:"))
self._scale_cb = QComboBox()
self._scale_cb.addItems(["Auto", "Fixed"])
self._scale_cb.currentTextChanged.connect(self._on_scale_changed)
ctrl.addWidget(self._scale_cb)
ctrl.addStretch()
self._pause_btn = QPushButton("⏸ Pause")
self._pause_btn.setCheckable(True)
self._pause_btn.setObjectName("pauseButton")
self._pause_btn.toggled.connect(self._on_pause)
ctrl.addWidget(self._pause_btn)
layout.addLayout(ctrl)
if _HAS_PG:
self._gw = pg.GraphicsLayoutWidget()
self._gw.setSizePolicy(
QSizePolicy.Policy.Expanding, QSizePolicy.Policy.Expanding
)
layout.addWidget(self._gw)
else:
layout.addWidget(QLabel(
"⚠ pyqtgraph not installed.\n\npip install pyqtgraph\n\nData is still acquired & logged.",
alignment=Qt.AlignmentFlag.AlignCenter,
))
# ── Refresh (rebuild plots after device list changes) ─────────────────
def refresh(self):
if not _HAS_PG:
return
self._gw.clear()
self._plots.clear()
devs = self.registry.all_instances()
n_devs = len(devs)
if n_devs == 0:
return
ref_plot = None # for x-axis linking
for row, dev in enumerate(devs):
plot = self._gw.addPlot(row=row, col=0)
plot.setLabel("left", f"{dev.info.icon} {dev.info.name}")
plot.showGrid(x=True, y=True, alpha=0.12)
plot.getAxis("left").setStyle(tickFont=self._mono_font())
plot.getAxis("bottom").setStyle(tickFont=self._mono_font())
if row < n_devs - 1:
plot.getAxis("bottom").setStyle(showValues=False)
plot.getAxis("bottom").setHeight(0)
else:
plot.setLabel("bottom", "Elapsed (s)")
if ref_plot is not None:
plot.setXLink(ref_plot)
ref_plot = plot
legend = plot.addLegend(
offset=(5, 5),
labelTextColor="#94a3b8",
brush=pg.mkBrush("#161d2e"),
pen=pg.mkPen("#2a3558"),
)
self._plots[dev.info.device_id] = {}
for ch in dev.info.channels:
if not ch.enabled:
continue
pen = pg.mkPen(color=ch.color, width=1.8)
curve = plot.plot([], [], pen=pen, name=ch.name)
self._plots[dev.info.device_id][ch.channel_id] = {
"curve": curve,
"plot": plot,
}
@staticmethod
def _mono_font():
from PyQt6.QtGui import QFont
f = QFont("IBM Plex Mono", 8)
return f
# ── Slots ────────────────────────────────────────────────────────────
@pyqtSlot(str, str, float, float)
def on_new_data(self, device_id: str, channel_id: str, timestamp: float, value: float):
if self._paused or not _HAS_PG:
return
dev_plots = self._plots.get(device_id)
if dev_plots is None:
return
entry = dev_plots.get(channel_id)
if entry is None:
return
buf = self.engine.get_buffer(device_id, channel_id)
if buf is None or len(buf) < 2:
return
ts, vs = buf.window(self._window)
if not ts:
return
ts_arr = np.array(ts, dtype=np.float64)
vs_arr = np.array(vs, dtype=np.float64)
entry["curve"].setData(ts_arr, vs_arr)
t_max = ts_arr[-1]
t_min = t_max - self._window
entry["plot"].setXRange(t_min, t_max, padding=0)
if self._scale_cb.currentText() == "Auto":
entry["plot"].enableAutoRange(axis="y")
def _on_window_changed(self, v: float):
self._window = v
def _on_pause(self, checked: bool):
self._paused = checked
self._pause_btn.setText("▶ Resume" if checked else "⏸ Pause")
def _on_scale_changed(self, text: str):
if not _HAS_PG:
return
if text == "Auto":
for dev_plots in self._plots.values():
for entry in dev_plots.values():
entry["plot"].enableAutoRange(axis="y")
|
