Скачать или смотреть Creating Two Columns with One Scrollable in Flutter

Learn how to create a layout in Flutter that features two columns, where one column can scroll independently. Perfect for lists and tables!
---
This video is based on the question https://stackoverflow.com/q/72952646/ asked by the user 'Amani' ( https://stackoverflow.com/u/852063/ ) and on the answer https://stackoverflow.com/a/72952810/ provided by the user 'Kaushik Chandru' ( https://stackoverflow.com/u/17169037/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Flutter: How can create two columns with one scrollable?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Creating Two Columns with One Scrollable in Flutter

When building an application with Flutter, it’s common to run into layout challenges. One such challenge is wanting to create a layout with two columns, where one of the columns is scrollable. This can be essential when dealing with large data sets or reports that may not fit on the screen all at once. In this guide, we'll guide you through how to achieve this structure using Flutter.

The Problem

You might have an existing Flutter layout where you have two columns; for instance, one side might show some controls or selections, while the other side contains a large data table. The typical scenario is that you want the data table to be scrollable so that users can easily navigate through the data, while the other column remains static. Here’s a simple outline of what we’re trying to achieve:

Static Column: This column contains controls or options that do not need to scroll.

Scrollable Column: This column holds a data table that could be too large to display entirely.

The Original Code Snippet

You might already be using a code structure similar to the one below:

[[See Video to Reveal this Text or Code Snippet]]

The Solution

To make the CustomTable scrollable, a slight modification in how your UI is structured will be necessary. Instead of directly placing the CustomTable inside the Expanded widget, we can utilize a SingleChildScrollView which allows for scrolling capabilities. Here’s how to implement it:

Modified Layout Code

Here’s the revised code that you should implement:

[[See Video to Reveal this Text or Code Snippet]]

Explanation of the Code

SizedBox: This widget is used to define the overall size of your layout based on the screen dimensions.

Row: Within this row, we evenly distribute the available space between the two columns using the Expanded widget.

First Expanded Column: This is for your static content (date selection, summaries, etc.), which does not need to scroll.

Second Expanded Column: This is wrapped in a SingleChildScrollView. This allows you to scroll through its content, making it perfect for lengthy tables or lists.

Why Use SingleChildScrollView?

Using SingleChildScrollView wraps your scrollable content and allows you to manage how much of your content is visible on the screen. It ensures that when the content exceeds the height of the available view, it will become scrollable rather than overflowing.

Conclusion

With the provided adjustments, you can successfully create a layout with two columns in Flutter, where one column remains fixed while the other can scroll. This is an essential design pattern in many applications, particularly those dealing with extensive datasets or controls.

By following the steps outlined above, you'll be able to enhance your Flutter user interface, making it more usable and efficient for your users. Keep experimenting with different layouts and widgets to find the best fit for your application needs!