Added airlines and destination_cities json files

DisplayWindow.py

@@ -5,7 +5,7 @@ import pyqtgraph as pg
 from PyQt6.QtWidgets import (QApplication, QMainWindow, QWidget,
                              QVBoxLayout, QHBoxLayout, QGridLayout,
                              QLabel, QPushButton, QSlider, QDateTimeEdit,
-                             QLineEdit, QComboBox)
+                             QLineEdit, QComboBox, QDateEdit)
 from PyQt6.QtGui import QPalette, QColor, QIcon
 
 
@@ -24,8 +24,8 @@ class MainWindow(QMainWindow):
         grid_layout = QGridLayout(central_widget)
 
         # Create labels and input fields
-        self.labels_text = ['Date and Time', 'Airline', 'Destination', 'Model Start Year']
-        self.input_fields = [QDateTimeEdit(self), QComboBox(self), QComboBox(self), QComboBox(self)]
+        self.labels_text = ['Date', 'Airline', 'Destination', 'Model Start Year']
+        self.input_fields = [QDateEdit(self), QComboBox(self), QComboBox(self), QComboBox(self)]
         self.input_fields[1].addItems(RegressionModel.airlines)
         self.input_fields[2].addItems(RegressionModel.destinations)
         self.input_fields[3].addItems(list(map(str, RegressionModel.model_years)))
@@ -39,7 +39,7 @@ class MainWindow(QMainWindow):
         # Connect signals
         for i in range(len(self.input_fields)):
             if i == 0:
-                self.input_fields[i].dateTimeChanged.connect(self.update_values)
+                self.input_fields[i].dateChanged.connect(self.update_values)
             else:
                 self.input_fields[i].currentTextChanged.connect(self.update_values)