News and views on the world of interactive media from the gskinner team
Category / open source
When building a custom UI control in Flutter it’s tempting to just use a GestureDetector and call it a day, but to do so would be a mistake! Especially if you’re planning on supporting users with alternate inputs like mouse or keyboard.
There are many ways to architect an app in Flutter, and just about as many state management frameworks out there to do it for you! With this in mind, we thought it might be nice to talk about how we build scale-able apps without a framework, using only the Provider package, and some simple application tiers.
There is a lot to like about Flutter, but one area I’m sure no one loves, is taming the Material Theme system! With over 65(!) properties, some of which, like TextTheme, break out into 10 more sub-properties is enough to make you go crazy pretty quick.
Last week we looked at how you can easily implement TextStyling, and this week we’re going to dive into Color Themes. We’ll take a look at a technique that we use to implement custom app-specific themes, while still providing Material ThemeData to the core Flutter components.
The original thought was to add the methods to MediaQuery, which didn’t seem that appealing because it would still be quite verbose to access. Then we realized we could just use the build context directly, which turned out really nice! So nice, that we’ve gone ahead and created a package for it here: https://pub.dev/packages/sized_context.
One of the big issues with Flutter for Web right now is it’s lack of support for dart.io. This means things like a simple Platform.isAndroid call will cause your web builds to crash on startup. In fact, just including the dart.io package _at all_ will break your app completely.
In cases like this, what is needed is some form of conditional compilation, so we can include the code on some platforms, and exclude it on others.
Some platforms like Unity, have built in platform defines, which let you easily partition sections of code for specific platforms. Unfortunately, this is not so easy to do with Flutter, but it is possible!