One of the most verbose parts of Flutter is handling of various font styles, sizes, and families. In this post, we’ll show a couple of the tricks we’re using in production to ease this pain point.
![Letterspace 1 6 3 x 4 Letterspace 1 6 3 x 4](https://macx.ws/uploads/posts/2016-03/1457118606_letterspace_03.jpeg)
Styles.dart
The first step we do in nearly every project, is to define a base Styles file, that will hold a variety of small classes, defining our core Fonts and TextStyles:
Some things to note:
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- Why the get functions instead of variables? Hot Reload! By using static functions, we can change these values at run-time for extremely fast iteration and tweaking.
- We can change the font style, or font sizes globally, extremely easily and quickly. All styling code is consolidated in one tight package.
- FontSizes.scale – A bit outside the scope of this article, but we like to expose a global scale modifier to our fonts. Normally this is 1, but we can tweak it for different form factors.
![Letterspace Letterspace](https://www.clearviewhwy.com/wp-content/uploads/2019/12/Letterspacing-Testing-01.jpg)
Itubedownloader 6 5 9. With the above class, we can now define a Text widget like so:
That’s not only a lot more readable, it’s also is significantly easier to maintain as your project scales.
Ok, so that’s pretty good… but it can be better!
While the above approach is an excellent foundation, it could still spiral out of control if you tried to define every single combination of bold/italic/character spacing. There can be a lot of ‘one off’ styles in an app, and it would be nice to be able to easily tweak these styles on the fly…
Dart Extensions to the rescue!
Modifying a text style is actually pretty easy, using the copyWith API, it’s just kinda verbose:
Oof. That’s a lot of code to just add bold, italic and tweak the letter spacing. It’s not super readable either, the important stuff (body, bold, italic, 1.6) represent only 15% of the characters, the rest is boilerplate.
Letterspace 1 6 3 4 As A Fraction
We define a super simple TextStyle Extension to ease this pain:
Now, we can re-write it like this:
Much better! Boilerplate is only about 50% of the character count, and the intent is much more clear.
We thought of creating a package for this, but decided that it should probably live in the excellent styled_widget package, so we’ll try and make that happen soon.
Letterspace 1 6 3 0 Or Higher Included
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