Fix for issue 35: Display full Start/End time to the microsecond

Start/end times in the tree will appear as elided text, i.e. '2015.312.09:39.00.000000' will appear as '2015.312.09:39...'. The user can either double click the cell or hover over it to see the full times. The same will also be true for the split channels dialogue window. The right panel will always show the full times to the microsecond.

nexus/ChannelSelectDialog.py

 #!/usr/bin/env python
 # -*- coding: utf-8 -*-*#
-'''
+"""
 Dialog for selecting channels from a station
 Lloyd Carothers
 IRIS/PASSCAL
-'''
+"""
+
 import sys
 import os
 
-from PySide6.QtWidgets import (QDialog,
-                               QApplication,
-                               QTableWidgetItem,
-                               )
-from PySide6.QtGui import (QFontMetrics, Qt)
+from PySide6.QtCore import Qt
+from PySide6.QtGui import QFontMetrics
 from PySide6.QtUiTools import loadUiType
+from PySide6.QtWidgets import QApplication, QTableWidgetItem
 
 from .obspyImproved import utc_to_str
 
 def load_ui(filename):
-    '''
+    """
     Helper function
     Load a ui file relative to this source file
-    '''
+    """
     path = os.path.join(os.path.dirname(__file__), filename)
     try:
             ret = loadUiType(path)
@@ -34,6 +33,7 @@ def load_ui(filename):
 class ChannelSelectDialog(*load_ui('ChannelSelectDialog.ui')):
     def __init__(self, station, parent=None):
         self.station = station
+        self.chan_map = {}
         super().__init__(parent)
         self.setupUi()
 
@@ -44,13 +44,26 @@ class ChannelSelectDialog(*load_ui('ChannelSelectDialog.ui')):
             self.selected_channels.append(self.chan_map[row])
         super().accept()
 
+    def sort_table(self, column):
+        """
+        Sort Channel Select Dialog table based on column
+        header selected by user.
+        """
+        row_map = {0: 'location_code', 1: 'code', 2: 'sample_rate',
+                   3: 'start_date', 4: 'end_date'}
+        order = self.tableWidget.horizontalHeader().sortIndicatorOrder()
+        descending = False if order == Qt.AscendingOrder else True
+        self.chan_map = {ind: v for ind, (_, v) in enumerate(sorted(self.chan_map.items(),
+                                                                    key=lambda item: getattr(item[1], row_map[column]),
+                                                                    reverse=descending))}
+
     def setupUi(self):
         super().setupUi(self)
         self.setWindowTitle('Select channels')
         self.label.setText('Station: {}'.format(self.station.code))
         self.tableWidget.setRowCount(len(self.station))
+        self.tableWidget.horizontalHeader().sectionClicked.connect(self.sort_table)
         # Add channels
-        self.chan_map = {}
         for row, chan in enumerate(self.station):
             for col, value in enumerate(
                     ('{:>2s}'.format(chan.location_code),
@@ -59,17 +72,16 @@ class ChannelSelectDialog(*load_ui('ChannelSelectDialog.ui')):
                      utc_to_str(chan.start_date),
                      utc_to_str(chan.end_date),
                      )):
-                item = QTableWidgetItem(value)
+                item = QTableWidgetItem()
                 item.setText(value)
                 # shorten start/end time
                 if col == 3 or col == 4:
                     # full time as tooltip
                     item.setToolTip(value)
                     # rounded time in table
-                    value = QFontMetrics(
-                    self.tableWidget.font()).elidedText(value,
-                                                        Qt.ElideRight,
-                                                        100)
+                    value = QFontMetrics(self.tableWidget.font()).elidedText(value,
+                                                                             Qt.ElideRight,
+                                                                             100)
                     item.setText(value)
                 self.tableWidget.setItem(row, col, item)
             self.chan_map[row] = chan