Make exit button work

clusterview.ui

@@ -197,7 +197,7 @@
     <addaction name="action_load_point_configuration"/>
     <addaction name="action_save_point_configuration"/>
     <addaction name="separator"/>
-    <addaction name="actionExit"/>
+    <addaction name="action_exit"/>
    </widget>
    <widget class="QMenu" name="menu_help">
     <property name="title">
@@ -290,7 +290,7 @@
     <string>Load Point Configuration</string>
    </property>
   </action>
-  <action name="actionExit">
+  <action name="action_exit">
    <property name="text">
     <string>Exit</string>
    </property>

clusterview_ui.py

@@ -113,14 +113,14 @@ class Ui_MainWindow(object):
         self.action_save_point_configuration.setObjectName("action_save_point_configuration")
         self.action_load_point_configuration = QtWidgets.QAction(MainWindow)
         self.action_load_point_configuration.setObjectName("action_load_point_configuration")
-        self.actionExit = QtWidgets.QAction(MainWindow)
-        self.actionExit.setObjectName("actionExit")
+        self.action_exit = QtWidgets.QAction(MainWindow)
+        self.action_exit.setObjectName("action_exit")
         self.action_generate_random_points = QtWidgets.QAction(MainWindow)
         self.action_generate_random_points.setObjectName("action_generate_random_points")
         self.menu_file.addAction(self.action_load_point_configuration)
         self.menu_file.addAction(self.action_save_point_configuration)
         self.menu_file.addSeparator()
-        self.menu_file.addAction(self.actionExit)
+        self.menu_file.addAction(self.action_exit)
         self.menubar.addAction(self.menu_file.menuAction())
         self.menubar.addAction(self.menu_help.menuAction())
         self.tool_bar.addAction(self.action_generate_random_points)
@@ -158,5 +158,5 @@ class Ui_MainWindow(object):
         self.action_move_points.setToolTip(_translate("MainWindow", "Enables the movement of a selection of points."))
         self.action_save_point_configuration.setText(_translate("MainWindow", "Save Point Configuration"))
         self.action_load_point_configuration.setText(_translate("MainWindow", "Load Point Configuration"))
-        self.actionExit.setText(_translate("MainWindow", "Exit"))
+        self.action_exit.setText(_translate("MainWindow", "Exit"))
         self.action_generate_random_points.setText(_translate("MainWindow", "Generate Random Points"))

main_window.py

@@ -25,6 +25,8 @@ class MainWindow(QMainWindow, Ui_MainWindow):
     `clusterview.ui`.
     """
 
+    # This is a static mode variable since there will only ever
+    # be one MainWindow.
     __mode = Mode.OFF
 
     def __init__(self, parent=None):
@@ -78,6 +80,8 @@ class MainWindow(QMainWindow, Ui_MainWindow):
         self.action_load_point_configuration.triggered.connect(
             self.__open_points_file)
 
+        self.action_exit.triggered.connect(self.__close_event)
+
         # Override handler for mouse press so we can draw points based on
         # the OpenGL coordinate system inside of the OpenGL Widget.
         self.opengl_widget.mousePressEvent = self.__ogl_click_dispatcher
@@ -139,6 +143,10 @@ class MainWindow(QMainWindow, Ui_MainWindow):
     def mode(self, mode):
         self.__mode = mode
 
+    def __close_event(self, event):
+        import sys
+        sys.exit(0)
+
     def __open_points_file(self):
         ofile, _ = QFileDialog.getOpenFileName(self,
                                                "Open Point Configuration",