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"""
ui/alarm_panel.py — Alarm event log panel.
"""
from datetime import datetime
from PyQt6.QtWidgets import (
QWidget, QVBoxLayout, QHBoxLayout, QLabel,
QScrollArea, QFrame, QPushButton
)
from PyQt6.QtCore import Qt
class AlarmEntry(QFrame):
def __init__(self, device_id, channel_id, value, kind, timestamp):
super().__init__()
self.setObjectName("alarmEntry")
color = "#f85149" if kind == "high" else "#d29922"
self.setStyleSheet(f"border-left: 3px solid {color};")
layout = QHBoxLayout(self)
layout.setContentsMargins(8, 4, 8, 4)
icon = "▲" if kind == "high" else "▼"
msg = QLabel(f"{icon} {device_id} / {channel_id} = {value:.3f} [{kind.upper()}]")
msg.setObjectName("alarmMsg")
ts_lbl = QLabel(timestamp)
ts_lbl.setObjectName("alarmTs")
layout.addWidget(msg)
layout.addStretch()
layout.addWidget(ts_lbl)
class AlarmPanel(QWidget):
def __init__(self):
super().__init__()
self._build_ui()
def _build_ui(self):
layout = QVBoxLayout(self)
layout.setContentsMargins(0, 0, 0, 0)
layout.setSpacing(0)
hdr_row = QHBoxLayout()
hdr = QLabel(" ALARMS")
hdr.setObjectName("panelHeader")
hdr_row.addWidget(hdr)
hdr_row.addStretch()
clr = QPushButton("Clear")
clr.setObjectName("clearAlarmsBtn")
clr.clicked.connect(self.clear_alarms)
hdr_row.addWidget(clr)
hdr_widget = QWidget()
hdr_widget.setLayout(hdr_row)
hdr_widget.setObjectName("alarmHeaderWidget")
layout.addWidget(hdr_widget)
scroll = QScrollArea()
scroll.setWidgetResizable(True)
self._container = QWidget()
self._inner = QVBoxLayout(self._container)
self._inner.setContentsMargins(4, 4, 4, 4)
self._inner.setSpacing(3)
self._inner.addStretch()
scroll.setWidget(self._container)
layout.addWidget(scroll)
self._scroll = scroll
self._count = 0
def add_alarm(self, device_id, channel_id, value, kind):
ts = datetime.now().strftime("%H:%M:%S")
entry = AlarmEntry(device_id, channel_id, value, kind, ts)
self._inner.insertWidget(0, entry)
self._count += 1
# Keep last 200
if self._count > 200:
item = self._inner.takeAt(self._inner.count() - 2)
if item and item.widget():
item.widget().deleteLater()
self._count -= 1
def clear_alarms(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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