Master UI Design in Flutter with OpenAI Codex

Table of Contents

1. Introduction
2. Completion Screen
   1. Setting the Initial Widget
   2. Handling the Page Transition
   3. Implementing the Reorderable ListView
3. Dummy List and List Tiles
   1. Mapping the Dummy List
   2. Displaying Each Item in a List Tile
   3. Adding Draggable Functionality
   4. Implementing Delete Functionality
4. Conclusion

Completion Screen

The completion screen is the final step in our process, where we display the completions we have received from OpenAI codecs. This screen allows us to drag the code completions around and control their display. Let's dive into the implementation details of the completion screen.

Setting the Initial Widget

To start, we Create a completion_screen.Dart file and define a class called CompletionScreen. We set the initial widget of this screen as a Scaffold and place the title at the top. The title is set as "View Completions", which is stored in a constant.

Handling the Page Transition

Next, we need to handle the page transition from the previous screen to the completion screen. In the bottom button of the previous screen, we check if the widget.screenNumber is equal to 2, which corresponds to the page playground screen. If it is, we set the screen to the completion screen. This ensures that clicking on the button takes us to the completion screen.

Implementing the Reorderable ListView

In the body of the completion screen, we use a specific Type of widget called the ReorderableListView. This widget allows us to list our completions and drag them around to change their order. It provides a built-in reorder function for easy rearrangement.

We start by creating a dummy list in the constants.dart file, which represents a few code completions. We then map this dummy list and display each item in a ListTile.

Dummy List and List Tiles

Mapping the Dummy List

To populate the list with the dummy completions, we use the ListView.builder constructor. It takes a itemBuilder function that maps each item in the dummy list to a ListTile. This allows us to dynamically display the completions as list tiles.

Displaying Each Item in a List Tile

Each list tile has a key property for uniqueness. We set the title property as a Text widget containing the completion. The leading property is set with an icon representing draggability, indicating that the completion can be dragged around. In the trailing property, we add a delete functionality represented by an icon button.

Adding Draggable Functionality

In order to make the completions draggable, we utilize the ReorderableListView's onReorder property. This function controls how the items are displayed when they are dragged to a new position. By setting the state to the new index, we maintain the correct order of the completions.

Implementing Delete Functionality

To allow users to remove specific completions from the list, we add delete functionality to the trailing property of each list tile. When the delete button is clicked, the corresponding completion is removed from the list.

Conclusion

In this article, we have implemented the completion screen, which displays the completions we receive from OpenAI codecs. We have used the ReorderableListView widget to make the completions draggable and added delete functionality to remove completions. The completion screen is the final step in our process, and now we can move on to the design screen for further customization.