Master Flutter Layout Design with OpenAI Codex Tutorial

Table of Contents

1. Introduction
2. Creating a New Class for the Playground Screen
3. Importing Packages and Removing Unused Ones
4. Defining the Bottom Button Functionality
5. Working on the Playground Screen Layout
6. Setting Up the Upper Bar and Title
7. Handling the Body with a Single Child Scroll
8. Adding the Enter Prompt Text Widget
9. Implementing the Text Field as a Text Area
10. Styling and Aligning the Button
11. Adding the Completion Text Widgets
12. Designing the Bottom Button Class
13. Handling Props in the Bottom Button Class
14. Navigating Between Screens
15. Implementing the Navigator in the Playground and Landing Screens

Creating a Playground Screen in Flutter

In this tutorial, we will learn how to Create a playground screen in Flutter. The playground screen is a detailed screen that demonstrates the design We Are working on. We will start by creating a new class for the playground screen and importing the necessary packages. Then, we will define the functionality of the bottom button to navigate to the playground screen. After that, we will focus on designing the layout of the playground screen, including the upper bar, title, and body. We will also add an enter prompt text widget and style the button. Finally, we will add the completion text widgets and implement the navigation between screens. So let's get started!

1. Introduction

Before we dive into creating the playground screen, let's briefly understand its purpose. The playground screen serves as a detailed view of the design we are working on. It allows us to enter Prompts and view the generated completions from OpenAI Codex. This screen will help us Visualize the prompts and completions in a more interactive manner.

2. Creating a New Class for the Playground Screen

To begin, we need to create a new class for the playground screen. This class will be responsible for building the UI elements and handling the functionality of the screen. We will create a file called "playground_screen.Dart" in the screens folder of our Flutter Project. Inside this file, we'll define the PlaygroundScreen class and its build method.

3. Importing Packages and Removing Unused Ones

Next, we'll import the necessary packages for our playground screen. We'll need the material package for implementing the UI components. We'll also remove any unused packages to keep our code clean and efficient.

4. Defining the Bottom Button Functionality

In the landing screen, we have a bottom button that should navigate the user to the playground screen when pressed. We'll add the necessary code to the onPressed event of the button in the BottomButton class. This code will use the Navigator to push a new route to the playground screen.

5. Working on the Playground Screen Layout

Now it's time to start working on the layout of the playground screen. We'll use Flutter's Scaffold widget as the base for our screen. Inside the Scaffold, we'll set up the upper bar and the title. The title text will be defined in the constants.dart file for consistency. We'll set the body of the Scaffold as a single child scroll view, which allows us to scroll through the screen if the content overflows.

6. Setting Up the Upper Bar and Title

In the upper bar of the playground screen, we'll display the title text. We'll set the title text by accessing the constant defined in the constants.dart file. This constant will hold the title "Coding AI". We'll import the constants.dart file and use the defined constant in a Text widget to display the title.

7. Handling the Body with a Single Child Scroll

Since the playground screen may contain multiple widgets and we don't have control over the length of the completions, we'll wrap the body of the screen in a SingleChildScrollView. This allows us to handle cases where the text or widgets overflow the screen by providing a scrollable view.

8. Adding the Enter Prompt Text Widget

We'll add a Text widget to display the enter prompt instruction on the playground screen. This widget will serve as an initial prompt for the user to enter their code or prompt. We'll import the constants.dart file and set the text for this widget using the defined constant.

9. Implementing the Text Field as a Text Area

To allow users to enter their prompts and see them as multiple lines, we'll implement the text field as a text area. This will provide users with more flexibility in entering and viewing their code or prompts. We'll modify the TextField widget by setting the maxLines property to 8 and removing the maxLine property. Additionally, we'll decorate the text field with a hint text to guide the user on how to define their prompt.

10. Styling and Aligning the Button

We'll style and Align the bottom button on the playground screen. We'll align it to the right side of the screen and Apply padding to ensure proper spacing. We'll also add padding to the text field and button for a better visual appearance.

11. Adding the Completion Text Widgets

On the playground screen, we'll display the completion text as a label above the generated completions. We'll add a Text widget to display this label and another text widget to dynamically Show the completions. To add a typewriter animation effect to the completions, we'll use the AnimatedTextKit Package. We'll import this package and use the TypewriterAnimatedText widget to achieve the desired effect. For now, we'll set a dummy completion to visualize the animation.

12. Designing the Bottom Button Class

We'll create a separate class for the bottom button to handle its functionality and props. This class will be responsible for building the button and navigating between screens. We'll pass the required props, such as the button text and screen number, to customize the button Based on the Current screen.

13. Handling Props in the Bottom Button Class

We'll handle the props passed to the bottom button class to customize its appearance and functionality. The button text prop will determine the text displayed on the button, while the screen number prop will be used for navigation purposes. We'll ensure that these props are required to be passed when using the bottom button.

14. Navigating Between Screens

To enable navigation between screens, we'll implement the Navigator in both the playground and landing screens. In the playground screen, we'll check the screen number prop to determine the next screen to navigate to. If the screen number is 1, we'll navigate to the completion screen. Otherwise, we'll navigate back to the landing screen. Similarly, in the landing screen, we'll set the screen number to 1 to navigate to the playground screen.

15. Implementing the Navigator in the Playground and Landing Screens

Finally, we'll address the errors in both the playground and landing screens by implementing the Navigator logic. In the playground screen, we'll set the screen number to 2 to navigate to the completion screen. We'll also adjust the button text accordingly. In the landing screen, we'll set the screen number to 1 to navigate to the playground screen. These changes will ensure that clicking the button properly navigates between the screens.

Now that we have covered all the steps, we can start working on creating the playground screen in our Flutter project. Remember to save your progress and test the navigation and UI elements along the way. Happy coding!