1 files changed, 127 insertions, 0 deletions
diff --git a/daq_system/ui/device_panel.py b/daq_system/ui/device_panel.py
new file mode 100644
index 0000000..9b6c7e4
--- /dev/null
+++ b/daq_system/ui/device_panel.py
@@ -0,0 +1,127 @@
+"""
+ui/device_panel.py
+
+Left sidebar showing all registered devices with status indicators.
+"""
+
+from PyQt6.QtWidgets import (
+    QWidget, QVBoxLayout, QLabel, QPushButton,
+    QHBoxLayout, QScrollArea, QFrame
+)
+from PyQt6.QtCore import Qt, pyqtSignal
+
+from devices.base_device import DeviceStatus
+from devices.device_registry import DeviceRegistry
+from core.acquisition import AcquisitionEngine
+
+
+class DeviceCard(QFrame):
+    config_clicked = pyqtSignal(str)
+    toggle_clicked = pyqtSignal(str, bool)
+
+    STATUS_COLORS = {
+        DeviceStatus.CONNECTED: "#3fb950",
+        DeviceStatus.SIMULATED: "#58a6ff",
+        DeviceStatus.DISCONNECTED: "#8b949e",
+        DeviceStatus.CONNECTING: "#d29922",
+        DeviceStatus.ERROR: "#f85149",
+    }
+
+    def __init__(self, device, parent=None):
+        super().__init__(parent)
+        self.device = device
+        self.setObjectName("deviceCard")
+        self._build()
+
+    def _build(self):
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(8, 8, 8, 8)
+        layout.setSpacing(4)
+
+        # Header row
+        hdr = QHBoxLayout()
+        icon = QLabel(self.device.info.icon)
+        icon.setObjectName("deviceIcon")
+        hdr.addWidget(icon)
+
+        name = QLabel(self.device.info.name)
+        name.setObjectName("deviceName")
+        hdr.addWidget(name)
+        hdr.addStretch()
+
+        color = self.STATUS_COLORS.get(self.device.status, "#8b949e")
+        self.status_dot = QLabel("●")
+        self.status_dot.setStyleSheet(f"color: {color}; font-size: 10px;")
+        hdr.addWidget(self.status_dot)
+
+        layout.addLayout(hdr)
+
+        # ID + type
+        sub = QLabel(f"{self.device.info.device_id}  ·  {self.device.info.device_type}")
+        sub.setObjectName("deviceSub")
+        layout.addWidget(sub)
+
+        # Channel count
+        ch_count = sum(1 for ch in self.device.info.channels if ch.enabled)
+        ch_lbl = QLabel(f"{ch_count} channel{'s' if ch_count != 1 else ''}")
+        ch_lbl.setObjectName("deviceChannelCount")
+        layout.addWidget(ch_lbl)
+
+        # Config button
+        cfg_btn = QPushButton("Configure")
+        cfg_btn.setObjectName("configButton")
+        cfg_btn.clicked.connect(lambda: self.config_clicked.emit(self.device.info.device_id))
+        layout.addWidget(cfg_btn)
+
+    def refresh_status(self):
+        color = self.STATUS_COLORS.get(self.device.status, "#8b949e")
+        self.status_dot.setStyleSheet(f"color: {color}; font-size: 10px;")
+
+
+class DevicePanel(QWidget):
+    config_requested = pyqtSignal(str)
+
+    def __init__(self, registry: DeviceRegistry, engine: AcquisitionEngine):
+        super().__init__()
+        self.registry = registry
+        self.engine = engine
+        self._cards = {}
+        self._build_ui()
+        self.refresh()
+
+    def _build_ui(self):
+        layout = QVBoxLayout(self)
+        layout.setContentsMargins(0, 0, 0, 0)
+        layout.setSpacing(0)
+
+        header = QLabel("  DEVICES")
+        header.setObjectName("panelHeader")
+        layout.addWidget(header)
+
+        scroll = QScrollArea()
+        scroll.setWidgetResizable(True)
+        scroll.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy.ScrollBarAlwaysOff)
+        scroll.setObjectName("deviceScroll")
+
+        self._container = QWidget()
+        self._inner = QVBoxLayout(self._container)
+        self._inner.setContentsMargins(8, 8, 8, 8)
+        self._inner.setSpacing(8)
+        self._inner.addStretch()
+
+        scroll.setWidget(self._container)
+        layout.addWidget(scroll)
+
+    def refresh(self):
+        # Remove old cards
+        for card in self._cards.values():
+            self._inner.removeWidget(card)
+            card.deleteLater()
+        self._cards.clear()
+
+        for dev in self.registry.all_instances():
+            card = DeviceCard(dev)
+            card.config_clicked.connect(self.config_requested.emit)
+            # Insert before the stretch
+            self._inner.insertWidget(self._inner.count() - 1, card)
+            self._cards[dev.info.device_id] = card