Implement exporting GPS data to file

sohstationviewer/view/plotting/gps_dialog.py

 import sys
+from pathlib import Path
+from typing import List
 
+from model.gps_point import GPSPoint
+from model.mseed.mseed import MSeed
 from view.plotting.plotting_widget.plotting_widget import PlottingWidget
 
 from PySide2 import QtWidgets, QtCore
@@ -15,10 +19,11 @@ class GPSWidget(PlottingWidget):
 
 
 class GPSDialog(QtWidgets.QWidget):
-    def __init__(self, parent, gps_points):
+    def __init__(self, parent, gps_points: List[GPSPoint]):
         super().__init__()
         self.parent = parent
         self.gps_points = gps_points
+        self.data_path = None
         self.info_text_browser = QtWidgets.QTextBrowser(self)
 
         self.setGeometry(300, 300, 400, 500)
@@ -62,11 +67,31 @@ class GPSDialog(QtWidgets.QWidget):
         main_layout.addLayout(bottom_layout)
 
     def export_gps_points(self):
-        pass
+        folder_name = self.data_path.name
+        outside_folder = self.data_path.parent
+        with open(outside_folder / f'{folder_name}.gps.dat', 'w+') as outfile:
+            outfile.write(f'# GPS data points for {folder_name}\n')
+            for point in self.gps_points:
+                is_bad_point = (point.height == 0 and point.longitude == 0 and
+                                point.longitude == 0 and
+                                point.num_satellite_used == 0)
+                if is_bad_point:
+                    continue
+                line = (
+                    f'{point.last_timemark}\t{point.fix_type}\t'
+                    f'{point.num_satellite_used}\t{point.latitude:+.6f}\t'
+                    f'{point.longitude:+.6f}\t{point.height:.6f}\n'
+                )
+                outfile.write(line)
 
 
 if __name__ == '__main__':
+    import os
+    os.chdir('/Users/kle/PycharmProjects/sohstationviewer')
     app = QtWidgets.QApplication(sys.argv)
-    wnd = GPSDialog(None, [])
-    wnd.show()
-    sys.exit(app.exec_())
+    data = MSeed(QtWidgets.QTextBrowser(), '/Users/kle/Documents/SOHView data/Q330/Q330_5281.sdr')
+    wnd = GPSDialog(None, data.gps_points)
+    wnd.data_path = Path('/Users/kle/Documents/SOHView data/Q330/Q330_5281.sdr')
+    wnd.export_button.click()
+    # wnd.show()
+    # sys.exit(app.exec_())