Implemented a GUI framework

A prototype for the GUI has been created. The GUI consists of a window with a couple clickable and draggable buttons. Closes #44 (closed)

GUI/main_window.py

-"""
+"""@package docstring
+B-ASIC GUI Module.
 This python file is an example of how a GUI can be implemented
 using buttons and textboxes.
 """
+
 import sys
 
 from PyQt5.QtWidgets import QApplication, QWidget, QMainWindow, QLabel, QAction,\
@@ -11,15 +13,13 @@ from PyQt5.QtGui import QIcon, QFont, QPainter, QPen
 
 
 class DragButton(QPushButton):
-    """How to create a dragbutton
-    https://stackoverflow.com/questions/12219727/dragging-moving-a-qpushbutton-in-pyqt
-    """
+    """How to create a dragbutton"""
     def mousePressEvent(self, event):
-        self.__mouse_press_pos = None
-        self.__mouse_move_pos = None
+        self._mouse_press_pos = None
+        self._mouse_move_pos = None
         if event.button() == Qt.LeftButton:
-            self.__mouse_press_pos = event.globalPos()
-            self.__mouse_move_pos = event.globalPos()
+            self._mouse_press_pos = event.globalPos()
+            self._mouse_move_pos = event.globalPos()
 
         super(DragButton, self).mousePressEvent(event)
 
@@ -27,17 +27,17 @@ class DragButton(QPushButton):
         if event.buttons() == Qt.LeftButton:
             cur_pos = self.mapToGlobal(self.pos())
             global_pos = event.globalPos()
-            diff = global_pos - self.__mouse_move_pos
+            diff = global_pos - self._mouse_move_pos
             new_pos = self.mapFromGlobal(cur_pos + diff)
             self.move(new_pos)
 
-            self.__mouse_move_pos = global_pos
+            self._mouse_move_pos = global_pos
 
         super(DragButton, self).mouseMoveEvent(event)
 
     def mouseReleaseEvent(self, event):
-        if self.__mouse_press_pos is not None:
-            moved = event.globalPos() - self.__mouse_press_pos
+        if self._mouse_press_pos is not None:
+            moved = event.globalPos() - self._mouse_press_pos
             if moved.manhattanLength() > 3:
                 event.ignore()
                 return
@@ -45,8 +45,7 @@ class DragButton(QPushButton):
         super(DragButton, self).mouseReleaseEvent(event)
 
 class SubWindow(QWidget):
-    """Creates a sub window
-    """
+    """Creates a sub window """
     def create_window(self, window_width, window_height):
         """Creates a window
         """
@@ -56,15 +55,14 @@ class SubWindow(QWidget):
         self.resize(window_width, window_height)
 
 class MainWindow(QMainWindow):
-    """Main window for the program
-    """
+    """Main window for the program"""
     def __init__(self, *args, **kwargs):
         super(MainWindow, self).__init__(*args, **kwargs)
 
         self.setWindowTitle(" ")
         self.setWindowIcon(QIcon('small_logo.png'))
 
-        #Menu buttons
+        # Menu buttons
         test_button = QAction("Test", self)
 
         exit_button = QAction("Exit", self)
@@ -96,7 +94,25 @@ class MainWindow(QMainWindow):
         view_menu = menu_bar.addMenu("&View")
         view_menu.addAction(view_button)
 
-        # Drag buttons
+        self.setStatusBar(QStatusBar(self))
+
+    def on_file_button_click(self):
+        print("File")
+
+    def on_edit_button_click(self):
+        print("Edit")
+
+    def on_view_button_click(self):
+        print("View")
+
+    def exit_app(self, checked):
+        QApplication.quit()
+
+    def clicked(self):
+        print("Drag button clicked")
+
+    def add_drag_buttons(self):
+        """Adds draggable buttons"""
         addition_button = DragButton("Addition", self)
         addition_button.move(10, 130)
         addition_button.setFixedSize(70, 20)
@@ -127,23 +143,6 @@ class MainWindow(QMainWindow):
         multiplication_button2.setFixedSize(70, 20)
         multiplication_button2.clicked.connect(self.create_sub_window)
 
-        self.setStatusBar(QStatusBar(self))
-
-    def on_file_button_click(self):
-        print("File")
-
-    def on_edit_button_click(self):
-        print("Edit")
-
-    def on_view_button_click(self):
-        print("View")
-
-    def exit_app(self, checked):
-        QApplication.quit()
-
-    def clicked(self):
-        print("Drag button clicked")
-
     def paintEvent(self, e):
         # Temporary black box for operations
         painter = QPainter(self)
@@ -189,17 +188,13 @@ class MainWindow(QMainWindow):
         self.sub_window.id_line.move(70, 70)
         self.sub_window.id_line.resize(100, 20)
 
-
         self.sub_window.show()
 
 
-
 if __name__ == "__main__":
     app = QApplication(sys.argv)
-
     window = MainWindow()
+    window.add_drag_buttons()
     window.resize(960, 720)
-
     window.show()
-
     app.exec_()