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import os
import sys
from typing import Any, Dict, Optional
from loguru import logger
from PyQt5.QtCore import QObject, QSettings, QThread, pyqtSignal, pyqtSlot, Qt
from PyQt5.QtGui import QCloseEvent
from PyQt5.QtWidgets import (
QApplication,
QCheckBox,
QComboBox,
QDoubleSpinBox,
QFileDialog,
QFormLayout,
QHBoxLayout,
QLabel,
QLineEdit,
QMainWindow,
QPushButton,
QSpinBox,
QVBoxLayout,
QWidget,
)
from picostream.cli import Streamer, VOLTAGE_RANGE_MAP
from picostream.dfplot import HDF5LivePlotter
class StreamerWorker(QObject):
"""Worker to run the data acquisition in a background thread."""
finished = pyqtSignal()
error = pyqtSignal(str)
stopRequested = pyqtSignal()
def __init__(self, settings: Dict[str, Any]) -> None:
"""Initialise the worker."""
super().__init__()
self.streamer: Optional[Streamer] = None
self.settings = settings
def run(self) -> None:
"""Run the data acquisition."""
try:
self.streamer = Streamer(**self.settings)
self.streamer.run()
except Exception as e:
self.error.emit(str(e))
self.finished.emit()
@pyqtSlot()
def stop(self) -> None:
"""Signal the acquisition to stop."""
if self.streamer:
self.streamer.shutdown()
self.finished.emit()
class PicoStreamMainWindow(QMainWindow):
"""The main window for the PicoStream GUI application."""
def __init__(self) -> None:
"""Initialise the main window."""
super().__init__()
self.setWindowTitle("PicoStream")
self.setGeometry(100, 100, 1200, 600)
self.settings = QSettings("picostream", "PicoStream")
self.thread: Optional[QThread] = None
self.worker: Optional[StreamerWorker] = None
central_widget = QWidget()
self.setCentralWidget(central_widget)
main_layout = QHBoxLayout(central_widget)
# Left panel for settings
settings_panel = QWidget()
settings_panel.setFixedWidth(350)
settings_layout = QVBoxLayout(settings_panel)
form_layout = QFormLayout()
self.sample_rate_input = QDoubleSpinBox()
self.sample_rate_input.setRange(1, 125)
self.sample_rate_input.setValue(62.5)
self.sample_rate_input.setSuffix(" MS/s")
form_layout.addRow("Sample Rate:", self.sample_rate_input)
self.resolution_input = QComboBox()
self.resolution_input.addItems(["12", "14", "15", "16", "8"])
form_layout.addRow("Resolution (bits):", self.resolution_input)
self.voltage_range_input = QComboBox()
self.voltage_range_input.addItems(VOLTAGE_RANGE_MAP.values())
form_layout.addRow("Voltage Range:", self.voltage_range_input)
self.output_file_input = QLineEdit()
self.output_file_input.setText("output.hdf5")
file_browse_button = QPushButton("Browse...")
file_browse_button.clicked.connect(self.select_output_file)
file_layout = QHBoxLayout()
file_layout.addWidget(self.output_file_input)
file_layout.addWidget(file_browse_button)
form_layout.addRow("Output File:", file_layout)
self.hw_downsample_input = QSpinBox()
self.hw_downsample_input.setRange(1, 1000)
form_layout.addRow("HW Downsample:", self.hw_downsample_input)
self.downsample_mode_input = QComboBox()
self.downsample_mode_input.addItems(["average", "aggregate"])
form_layout.addRow("Downsample Mode:", self.downsample_mode_input)
self.offset_v_input = QDoubleSpinBox()
self.offset_v_input.setRange(-1.0, 1.0)
self.offset_v_input.setSingleStep(0.01)
self.offset_v_input.setDecimals(3)
self.offset_v_input.setSuffix(" V")
form_layout.addRow("Offset:", self.offset_v_input)
self.live_only_checkbox = QCheckBox("Live-only (overwrite buffer)")
self.max_buffer_input = QDoubleSpinBox()
self.max_buffer_input.setRange(0.1, 60.0)
self.max_buffer_input.setValue(1.0)
self.max_buffer_input.setSuffix(" s")
self.live_only_checkbox.stateChanged.connect(
lambda state: self.max_buffer_input.setEnabled(state > 0)
)
form_layout.addRow(self.live_only_checkbox, self.max_buffer_input)
settings_layout.addLayout(form_layout)
self.start_button = QPushButton("Start Acquisition")
self.stop_button = QPushButton("Stop Acquisition")
self.stop_button.setEnabled(False)
settings_layout.addWidget(self.start_button)
settings_layout.addWidget(self.stop_button)
settings_layout.addStretch()
# Right panel for the plot
self.plotter = HDF5LivePlotter(hdf5_path=self.output_file_input.text())
main_layout.addWidget(settings_panel)
main_layout.addWidget(self.plotter, 1)
# Connect signals
self.start_button.clicked.connect(self.start_acquisition)
self.stop_button.clicked.connect(self.stop_acquisition)
self.output_file_input.textChanged.connect(self.plotter.set_hdf5_path)
self.load_settings()
def select_output_file(self) -> None:
"""Open a dialog to select the output HDF5 file."""
file_name, _ = QFileDialog.getSaveFileName(
self, "Select Output File", self.output_file_input.text(), "HDF5 Files (*.hdf5)"
)
if file_name:
self.output_file_input.setText(file_name)
def start_acquisition(self) -> None:
"""Start the background data acquisition."""
self.start_button.setEnabled(False)
self.stop_button.setEnabled(True)
output_file = self.output_file_input.text()
# Reset plotter state and ensure a clean file for the new acquisition.
self.plotter.set_hdf5_path(output_file)
if os.path.exists(output_file):
try:
os.remove(output_file)
except OSError as e:
self.on_acquisition_error(f"Failed to remove old file: {e}")
self.on_acquisition_finished() # Reset UI state
return
settings = {
"sample_rate_msps": self.sample_rate_input.value(),
"resolution_bits": int(self.resolution_input.currentText()),
"channel_range_str": self.voltage_range_input.currentText(),
"output_file": output_file,
"hardware_downsample": self.hw_downsample_input.value(),
"downsample_mode": self.downsample_mode_input.currentText(),
"offset_v": self.offset_v_input.value(),
"max_buffer_seconds": self.max_buffer_input.value()
if self.live_only_checkbox.isChecked()
else None,
"enable_live_plot": False,
"is_gui_mode": True,
}
self.thread = QThread()
self.worker = StreamerWorker(settings)
self.worker.moveToThread(self.thread)
self.worker.stopRequested.connect(self.worker.stop, Qt.QueuedConnection)
self.thread.started.connect(self.worker.run)
self.worker.finished.connect(self.thread.quit)
self.worker.finished.connect(self.worker.deleteLater)
self.thread.finished.connect(self.thread.deleteLater)
self.worker.finished.connect(self.on_acquisition_finished)
self.worker.error.connect(self.on_acquisition_error)
self.thread.start()
self.plotter.start_updates()
def stop_acquisition(self) -> None:
"""Stop the background data acquisition."""
self.plotter.stop_updates()
if self.worker:
self.worker.stopRequested.emit()
self.stop_button.setEnabled(False)
def on_acquisition_finished(self) -> None:
"""Handle acquisition completion (both success and failure)."""
logger.info("Acquisition finished.")
self.plotter.stop_updates()
self.start_button.setEnabled(True)
self.stop_button.setEnabled(False)
self.thread = None
self.worker = None
def on_acquisition_error(self, err_msg: str) -> None:
"""Handle acquisition error."""
logger.error(f"Acquisition error: {err_msg}")
# In a real app, this would show a QMessageBox.
# The UI state is reset in on_acquisition_finished.
def closeEvent(self, event: QCloseEvent) -> None:
"""Handle window close event."""
self.save_settings()
if self.thread and self.thread.isRunning():
self.stop_acquisition()
self.thread.wait() # Wait for the thread to finish
event.accept()
def save_settings(self) -> None:
"""Save current settings."""
self.settings.setValue("sample_rate", self.sample_rate_input.value())
self.settings.setValue("resolution", self.resolution_input.currentText())
self.settings.setValue("voltage_range", self.voltage_range_input.currentText())
self.settings.setValue("output_file", self.output_file_input.text())
self.settings.setValue("hw_downsample", self.hw_downsample_input.value())
self.settings.setValue("downsample_mode", self.downsample_mode_input.currentText())
self.settings.setValue("offset_v", self.offset_v_input.value())
self.settings.setValue("live_only_mode", self.live_only_checkbox.isChecked())
self.settings.setValue("max_buffer_seconds", self.max_buffer_input.value())
def load_settings(self) -> None:
"""Load settings."""
self.sample_rate_input.setValue(self.settings.value("sample_rate", 62.5, type=float))
self.resolution_input.setCurrentText(self.settings.value("resolution", "12"))
self.voltage_range_input.setCurrentText(
self.settings.value("voltage_range", "PS5000A_20V")
)
self.output_file_input.setText(self.settings.value("output_file", "output.hdf5"))
self.hw_downsample_input.setValue(self.settings.value("hw_downsample", 1, type=int))
self.downsample_mode_input.setCurrentText(
self.settings.value("downsample_mode", "average")
)
self.offset_v_input.setValue(self.settings.value("offset_v", 0.0, type=float))
live_only = self.settings.value("live_only_mode", False, type=bool)
self.live_only_checkbox.setChecked(live_only)
self.max_buffer_input.setValue(
self.settings.value("max_buffer_seconds", 1.0, type=float)
)
self.max_buffer_input.setEnabled(live_only)
def main() -> None:
"""GUI entry point."""
logger.remove()
logger.add(sys.stderr, level="INFO")
app = QApplication(sys.argv)
main_win = PicoStreamMainWindow()
main_win.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()
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