Updating todoapp.py

Program's_Contributed_By_Contributors/Python_Programs/todoapp.py

@@ -1,5 +1,6 @@
 import sys
-from PySide6.QtWidgets import QApplication, QMainWindow, QLabel, QVBoxLayout, QWidget, QLineEdit, QPushButton, QListView
+import os
+from PySide6.QtWidgets import QApplication, QMainWindow, QLabel, QVBoxLayout, QWidget, QLineEdit, QPushButton, QListView, QMessageBox
 from PySide6.QtCore import QStringListModel
 
 class TodoListApp(QMainWindow):
@@ -8,52 +9,78 @@ def __init__(self):
         self.setWindowTitle("Todo List App")
         self.setGeometry(100, 100, 400, 300)
 
-        self.tasks = []
+        # Load tasks from a file if available
+        self.tasks = self.load_tasks()
 
         self.central_widget = QWidget()
         self.setCentralWidget(self.central_widget)
 
         self.layout = QVBoxLayout()
         self.central_widget.setLayout(self.layout)
+
+        # Task list view
         self.task_list = QListView()
         self.task_list.setEditTriggers(QListView.NoEditTriggers)
         self.task_list.setSelectionMode(QListView.SingleSelection)
         self.layout.addWidget(self.task_list)
+
         self.label = QLabel("Enter a task:")
         self.layout.addWidget(self.label)
 
+        # Task input field
         self.task_input = QLineEdit()
         self.layout.addWidget(self.task_input)
 
+        # Add button
         self.add_button = QPushButton("Add")
         self.add_button.clicked.connect(self.add_task)
         self.layout.addWidget(self.add_button)
 
+        # Remove button
         self.remove_button = QPushButton("Remove")
         self.remove_button.clicked.connect(self.remove_task)
         self.layout.addWidget(self.remove_button)
 
+        # Update the task list view
         self.update_task_list()
 
     def add_task(self):
-        task = self.task_input.text()
-        if task:
+        task = self.task_input.text().strip()
+        if task:  # Input validation to ensure task is non-empty
             self.tasks.append(task)
             self.task_input.clear()
             self.update_task_list()
+            self.save_tasks()  # Save tasks after adding
 
     def remove_task(self):
         selected_index = self.task_list.currentIndex()
         if selected_index.isValid():
-            task = self.tasks[selected_index.row()]
-            self.tasks.remove(task)
-            self.update_task_list()
+            # Confirmation dialog for task removal
+            reply = QMessageBox.question(self, 'Confirm Removal', 
+                                         'Are you sure you want to remove this task?', 
+                                         QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
+            if reply == QMessageBox.Yes:
+                task = self.tasks[selected_index.row()]
+                self.tasks.remove(task)
+                self.update_task_list()
+                self.save_tasks()  # Save tasks after removal
 
     def update_task_list(self):
         self.task_list.setModel(QStringListModel(self.tasks))
 
+    def load_tasks(self):
+        if os.path.exists("tasks.txt"):
+            with open("tasks.txt", "r") as file:
+                return [line.strip() for line in file.readlines()]
+        return []
+
+    def save_tasks(self):
+        with open("tasks.txt", "w") as file:
+            for task in self.tasks:
+                file.write(f"{task}\n")
+
 if __name__ == "__main__":
     app = QApplication(sys.argv)
     window = TodoListApp()
     window.show()
-    sys.exit(app.exec())
+    sys.exit(app.exec())