Shortcut, tooltip, pep8

sohstationviewer/view/file_list_widget.py

@@ -4,9 +4,9 @@ from PySide2 import QtWidgets
 class FileListItem(QtWidgets.QListWidgetItem):
     """
     Widget to select file and save the absolute path of the file under
-    self.filePath variable
+    self.file_path variable
     """
-    def __init__(self, filePath, parent=None):
-        super().__init__(filePath.name, parent,
+    def __init__(self, file_path, parent=None):
+        super().__init__(file_path.name, parent,
                          type=QtWidgets.QListWidgetItem.UserType)
-        self.filePath = filePath
+        self.file_path = file_path

sohstationviewer/view/ui/main_ui.py

-# UI and connectSignals for MainWindow
+# UI and connectSignals for main_window
 
 from PySide2 import QtCore, QtGui, QtWidgets
 
 from sohstationviewer.view.calendar.calendar_widget import CalendarWidget
 
 from sohstationviewer.view.plotting.state_of_health_widget import SOHWidget
+
 from sohstationviewer.conf import constants
 
 
@@ -22,7 +23,7 @@ def add_separation_line(layout):
 class UIMainWindow(object):
     def __init__(self):
         """
-        Class that create widgets, menus and connect signals for MainWindow.
+        Class that create widgets, menus and connect signals for main_window.
         """
         super().__init__()
         """
@@ -243,9 +244,9 @@ class UIMainWindow(object):
         self.view_plot_type_action = None
         # ========================= Help Menu =============================
         """
-        calendarAction: QAction - Open Calendar Dialog as a helpful tool
+        calendar_action: QAction - Open Calendar Dialog as a helpful tool
         """
-        self.calendarAction = None
+        self.calendar_action = None
         """
         about_action: QAction - Open About Dialog to give information about
             SOHView
@@ -277,6 +278,7 @@ class UIMainWindow(object):
         main_layout.addWidget(self.tracking_info_text_browser)
         self.create_menu_bar(main_window)
         self.connect_signals(main_window)
+        self.create_shortcuts(main_window)
 
     def set_first_row(self, main_layout):
         """
@@ -388,15 +390,21 @@ class UIMainWindow(object):
 
         search_grid.addWidget(self.replot_button, 1, 3, 1, 1)
 
+        color_tip_fmt = ('Set the background color of the plot '
+                         ' to {0}')
         background_layout = QtWidgets.QHBoxLayout()
         # background_layout.setContentsMargins(0, 0, 0, 0)
         left_layout.addLayout(background_layout)
         background_layout.addWidget(QtWidgets.QLabel('Background:     '))
         self.background_black_radio_button = QtWidgets.QRadioButton(
             'B', self.central_widget)
+        self.background_black_radio_button.setToolTip(
+            color_tip_fmt.format('black'))
         background_layout.addWidget(self.background_black_radio_button)
         self.background_white_radio_button = QtWidgets.QRadioButton(
             'W', self.central_widget)
+        self.background_white_radio_button.setToolTip(
+            color_tip_fmt.format('white'))
         background_layout.addWidget(self.background_white_radio_button)
 
         add_separation_line(left_layout)
@@ -477,16 +485,25 @@ class UIMainWindow(object):
         submit_layout.setSpacing(5)
         left_layout.addLayout(submit_layout)
         self.read_button = QtWidgets.QPushButton('Read', self.central_widget)
+        self.read_button.setToolTip('Read selected files')
         submit_layout.addWidget(self.read_button)
         self.stop_button = QtWidgets.QPushButton('Stop', self.central_widget)
+        self.stop_button.setToolTip('Halt ongoing read')
         submit_layout.addWidget(self.stop_button)
         self.save_plot_button = QtWidgets.QPushButton(
             'Save plot', self.central_widget)
+        self.save_plot_button.setToolTip('Save plots to disk')
         submit_layout.addWidget(self.save_plot_button)
 
         self.info_list_widget = QtWidgets.QListWidget(self.central_widget)
         left_layout.addWidget(self.info_list_widget, 1)
 
+    def create_shortcuts(self, main_window):
+        seq = QtGui.QKeySequence('Ctrl+F')
+        chdir_shortcut = QtWidgets.QShortcut(seq, main_window)
+        chdir_shortcut.activated.connect(
+            main_window.change_current_directory)
+
     def create_menu_bar(self, main_window):
         """
         Setting up menu bar
@@ -505,6 +522,7 @@ class UIMainWindow(object):
         self.create_file_menu(main_window, file_menu)
         self.create_command_menu(main_window, command_menu)
         self.create_option_menu(main_window, option_menu)
+
         self.create_database_menu(main_window, database_menu)
         self.create_help_menu(main_window, help_menu)
 
@@ -603,9 +621,9 @@ class UIMainWindow(object):
         :param main_window: QMainWindow - main GUI for user to interact with
         :param menu: QMenu - Help Menu
         """
-        self.calendarAction = QtWidgets.QAction(
+        self.calendar_action = QtWidgets.QAction(
             'Calendar', main_window)
-        menu.addAction(self.calendarAction)
+        menu.addAction(self.calendar_action)
 
         self.about_action = QtWidgets.QAction(
             'About', main_window)
@@ -657,11 +675,12 @@ class UIMainWindow(object):
         # Form
 
         # Help
-        self.calendarAction.triggered.connect(main_window.open_calendar)
+        self.calendar_action.triggered.connect(main_window.open_calendar)
 
     def connect_widget_signals(self, main_window):
         main_window.current_directory_changed.connect(
             self.cwd_line_edit.setText)
+
         # first Row
         self.time_from_date_edit.setCalendarWidget(CalendarWidget(main_window))
         self.time_from_date_edit.setDate(QtCore.QDate.fromString(