Added saving and loading of measurements.

src/nqrduck_measurement/controller.py

@@ -1,4 +1,5 @@
 import logging
+import json
 from PyQt6.QtCore import pyqtSlot, pyqtSignal
 from PyQt6.QtWidgets import QWidget
 from nqrduck.module.module_controller import ModuleController
@@ -100,3 +101,43 @@ class MeasurementController(ModuleController):
         ):
             logger.debug("Received set averages failure.")
             self.set_averages_failure.emit()
+
+    def save_measurement(self, file_name : str) -> None:
+        """Save measurement to file.
+
+        Args:
+            file_name (str): Path to file.
+        """
+        logger.debug("Saving measurement.")
+        if not self.module.model.measurements:
+            logger.debug("No measurement to save.")
+            return
+        
+        measurement = self.module.model.measurements[-1].to_json()
+
+        with open(file_name, "w") as f:
+            json.dump(measurement, f)
+
+    def  load_measurement(self, file_name: str) -> None:
+        """Load measurement from file.
+
+        Args:
+            file_name (str): Path to file.
+        """
+        logger.debug("Loading measurement.")
+
+        try:
+            with open(file_name, "r") as f:
+                measurement = Measurement.from_json(json.load(f))
+                self.module.model.add_measurement(measurement)
+                self.module.model.displayed_measurement = measurement
+        except FileNotFoundError:
+            logger.debug("File not found.")
+            self.module.nqrduck_signal.emit(
+                "notification", ["Error", "File not found."]
+            )
+        except (json.JSONDecodeError, KeyError):
+            logger.debug("File is not a valid measurement file.")
+            self.module.nqrduck_signal.emit(
+                "notification", ["Error", "File is not a valid measurement file."]
+            )

src/nqrduck_measurement/model.py

@@ -7,6 +7,7 @@ logger = logging.getLogger(__name__)
 
 class MeasurementModel(ModuleModel):
 
+    FILE_EXTENSION = ".meas"
     # This constants are used to determine which view is currently displayed.
     FFT_VIEW = "fft"
     TIME_VIEW = "time"

src/nqrduck_measurement/view.py

@@ -72,6 +72,11 @@ class MeasurementView(ModuleView):
         self._ui_form.importButton.setIcon(Logos.Load16x16())
         self._ui_form.importButton.setIconSize(self._ui_form.importButton.size())
 
+        # Connect measurement save  and load buttons
+        self._ui_form.exportButton.clicked.connect(self.on_measurement_save_button_clicked)
+        self._ui_form.importButton.clicked.connect(self.on_measurement_load_button_clicked)
+
+
     def init_plotter(self) -> None:
         """Initialize plotter with the according units for time domain."""
         plotter = self._ui_form.plotter
@@ -164,6 +169,27 @@ class MeasurementView(ModuleView):
         logger.debug("Set averages failure.")
         self._ui_form.averagesEdit.setStyleSheet("border: 1px solid red;")
 
+    @pyqtSlot()
+    def on_measurement_save_button_clicked(self) -> None:
+        """Slot for when the measurement save button is clicked."""
+        logger.debug("Measurement save button clicked.")
+
+        file_manager = self.QFileManager(self.module.model.FILE_EXTENSION, parent=self.widget)
+        file_name = file_manager.saveFileDialog()
+        if file_name:
+            self.module.controller.save_measurement(file_name)
+
+    @pyqtSlot()
+    def on_measurement_load_button_clicked(self) -> None:
+        """Slot for when the measurement load button is clicked."""
+        logger.debug("Measurement load button clicked.")
+
+        file_manager = self.QFileManager(self.module.model.FILE_EXTENSION, parent=self.widget)
+        file_name = file_manager.loadFileDialog()
+        if file_name:
+            self.module.controller.load_measurement(file_name)
+
+
     class MeasurementDialog(QDialog):
         """ This Dialog is shown when the measurement is started and therefore blocks the main window.
         It shows the duck animation and a message."""
@@ -195,3 +221,5 @@ class MeasurementView(ModuleView):
                 continue
             self.spinner_movie.stop()
             super().hide()
+
+