Flutter Project Code

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Questions and Answers

What is the purpose of the ElevatedButton in the code?

To submit a new todo item. (correct)
To display a '+' symbol.
To update existing todo items.
To clear all todo items.

What does the method _deleteToDoItem accomplish?

It marks a todo as completed.
It clears all todos from the list.
It adds a new todo to the list.
It removes a todo from the todosList. (correct)

What is the role of the _addToDoItem method?

To display all todo items.
To remove a todo item from the list.
To add a new todo item to the list. (correct)
To change the status of a todo item.

What happens when the controller _todoController.clear() is called?

It clears the text field for new input. (B) Signup and view all the answers

How does the _handleToDoChange function modify a todo's status?

It toggles the isDone property of a todo. (C) Signup and view all the answers

What does the `_runFilter` function do when the `enteredKeyword` is empty?

It assigns the results to a predefined list. (A) Signup and view all the answers

What widget is used to input search queries in the given code?

TextField (A) Signup and view all the answers

Which property of the `TextField` widget allows it to update results based on user input?

onChanged (D) Signup and view all the answers

What does the `prefixIcon` property in the `InputDecoration` do in the `TextField`?

It shows a search icon. (A) Signup and view all the answers

What is the purpose of the `Container` widget wrapping the search box?

To specify padding and decoration. (D) Signup and view all the answers

What widget is used to display the list of ToDos in the Home class?

ListView (C) Signup and view all the answers

What color is used for the background of the Scaffold in the Home class?

Teal (C) Signup and view all the answers

What is the purpose of the IconButton within the ToDoItem widget?

To delete a Task (C) Signup and view all the answers

How is the list of ToDos managed in the Home class?

Using a State list (D) Signup and view all the answers

What style is applied to the 'All ToDos' text in the build method?

FontSize 30 with FontWeight w500 (D) Signup and view all the answers

Which method is called to initialize the _foundToDo list?

ToDo.todoList (A) Signup and view all the answers

What is the purpose of the `_handleToDoChange` method passed to the ToDoItem?

To modify ToDo status (A) Signup and view all the answers

What does the Container in the build method of Home class contain?

Widgets for viewing ToDos (A) Signup and view all the answers

What type of widget is 'MyApp' in the Flutter code?

StatelessWidget (B) Signup and view all the answers

What is the purpose of 'debugShowCheckedModeBanner' in the MaterialApp widget?

To remove the debug banner from the app (B) Signup and view all the answers

How is the 'ToDo' class structured in the Flutter code?

It includes required and optional parameters. (B) Signup and view all the answers

Which method is used to create a list of todo items in the ToDo class?

static List todoList() (D) Signup and view all the answers

What is the default value of 'isDone' in the ToDo constructor?

false (A) Signup and view all the answers

Which icon is used to represent a completed todo item?

Icons.check_box (C) Signup and view all the answers

What will happen when a todo item is tapped according to the code?

It will call onToDoChanged function (A) Signup and view all the answers

What type of padding is applied to the ListTile in ToDoItem?

EdgeInsets.symmetric(horizontal: 20, vertical: 5) (B) Signup and view all the answers

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Study Notes

Flutter Application Structure

Main Function: Entry point of the application, calls runApp with the MyApp widget.
MyApp Class: Stateless widget that sets up the MaterialApp.
- Title: "ToDo App"
- Debug banner is disabled.

ToDo Model

ToDo Class: Represents a single task with three properties:
- id: Unique identifier.
- todoText: Description of the task.
- isDone: Boolean indicating if the task is completed, defaults to false.
Static Method: todoList() returns a predefined list of ToDo objects.

UI Components

ToDoItem Class: Stateless widget displaying individual todo tasks.
- Displays a checkbox indicating completion status.
- Contains a delete button to remove the task.
- Executes callbacks for changing status or deleting the item.

Home Screen

Home Class: Stateful widget serving as the main screen for the app.
- todosList: Holds the list of tasks.
- _foundToDo: List of tasks currently displayed, initially set to all tasks.
- TextEditingController: Controls input for adding new tasks.

App Layout

AppBar: Custom AppBar with a title and a menu icon.
Body: Contains:
- A search box for filtering tasks.
- A list view displaying todo tasks.
- An input field with an add button to enter new tasks.

Interaction Logic

Task Management Methods:
- _handleToDoChange: Toggles the completion status of a task.
- _deleteToDoItem: Removes a task from the list based on its id.
- _addToDoItem: Adds a new task to the list based on user input.
- _runFilter: Filters tasks by searching through the todoText property.

Search Functionality

Search Box Widget: Text field that updates displayed tasks based on user input.
- Triggers _runFilter method on text change to filter tasks.

Styles and Design

Container Styles: Various containers are styled with padding, margins, and colors to enhance UX.
Button Styling: The add button uses specific colors and sizes for visibility.

Network Image

Profile Image: Displays a user’s image in the AppBar sourced from a URL.

This Flutter app setup provides a clear and interactive user interface for managing a ToDo list, featuring task addition, completion, and deletion, alongside a search functionality to filter tasks.

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