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"""
ui/alarm_panel.py — Alarm event log.
"""
from datetime import datetime
from PyQt6.QtWidgets import (
QWidget, QVBoxLayout, QHBoxLayout, QLabel,
QScrollArea, QFrame, QPushButton,
)
from PyQt6.QtCore import Qt
class AlarmRow(QFrame):
def __init__(self, dev_id: str, ch_id: str, value: float, kind: str):
super().__init__()
self.setObjectName("alarmEntry")
color = "#ef4444" if kind == "high" else "#f59e0b"
arrow = "▲" if kind == "high" else "▼"
self.setStyleSheet(f"QFrame#alarmEntry {{ border-left: 3px solid {color}; }}")
ts_str = datetime.now().strftime("%H:%M:%S.%f")[:11]
layout = QHBoxLayout(self)
layout.setContentsMargins(8, 3, 8, 3)
msg = QLabel(f"{arrow} {dev_id} / {ch_id} = {value:.4f} [{kind.upper()}]")
msg.setObjectName("alarmMsg")
ts = QLabel(ts_str)
ts.setObjectName("alarmTs")
layout.addWidget(msg, 1)
layout.addWidget(ts)
class AlarmPanel(QWidget):
def __init__(self):
super().__init__()
self._count = 0
self._build()
def _build(self):
layout = QVBoxLayout(self)
layout.setContentsMargins(0, 0, 0, 0)
layout.setSpacing(0)
hdr_w = QWidget()
hdr_w.setObjectName("alarmHeaderWidget")
hdr_lay = QHBoxLayout(hdr_w)
hdr_lay.setContentsMargins(0, 0, 4, 0)
hdr = QLabel(" ALARMS")
hdr.setObjectName("panelHeader")
hdr.setMinimumHeight(28)
hdr_lay.addWidget(hdr, 1)
clr = QPushButton("Clear")
clr.setObjectName("clearAlarmsBtn")
clr.clicked.connect(self.clear)
hdr_lay.addWidget(clr)
layout.addWidget(hdr_w)
self._scroll = QScrollArea()
self._scroll.setWidgetResizable(True)
self._container = QWidget()
self._inner = QVBoxLayout(self._container)
self._inner.setContentsMargins(4, 4, 4, 4)
self._inner.setSpacing(2)
self._inner.addStretch()
self._scroll.setWidget(self._container)
layout.addWidget(self._scroll)
def add_alarm(self, dev_id: str, ch_id: str, value: float, kind: str):
row = AlarmRow(dev_id, ch_id, value, kind)
self._inner.insertWidget(0, row)
self._count += 1
# Cap at 300 entries
if self._count > 300:
item = self._inner.takeAt(self._inner.count() - 2)
if item and item.widget():
item.widget().deleteLater()
self._count -= 1
def clear(self):
while self._inner.count() > 1:
item = self._inner.takeAt(0)
if item and item.widget():
item.widget().deleteLater()
self._count = 0
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