One of the most powerful features in flutter-view is that it allows you to use CSS styles to flutter widgets, and to set any property of any flutter widget.
For example, you can start with a simple Container:
greeting(flutter-view)
.example Hello world!
This will generate a function that returns a Container with the class name "example", that in turns contains a Text widget with the text "Hello world".
Then you can style this Container by assigning Sass styles to the class:
Flutter-view will process your styles, attaching them to the classes. Properties such as width and height are directly assigned. Some properties are recognized as CSS properties, and generate more code, such as color and font-size. The result is a normal Dart function you can call in your normal Dart code to render the styled view. In this case, a grey box with red bold text saying "Hello world!".
Structuring your files for styling
You can use CSS or Sass to set any property to any class or id in your Pug or HTML file.
To style a Pug file, create a Sass style file with the same name (but different extension) as your Pug file, in the same directory. For example, if you have a startpage.pug, to style it simply add a startpage.sass in the same directory.
Recommendation: create a directory per layout, with the name of your layout. Then inside, create a pug file, sass file and your model and other supporting files.
Example structure:
Applying styles as properties
You can apply extra properties to html elements by adding them through style rules.
To style anything in a flutter-view you:
add classes to the elements in your pug file,
add style rules to these classes in the related sass file
For example, given the following Pug:
.message hello!
This will translate into the following HTML:
<div class="message">hello!</div>
You can then use the .message class to assign properties using Sass or CSS:
.message
width: 200
height: 200
The resulting Dart will be a combination of your layout and style:
As you can see here, Sass is a nice match with Pug, since you can retain the same structure. This makes it easy to find the matching styles to your pug elements.
Setting expressions
You can set an expression in CSS by wrapping the expression in quotes and starting it with a colon.
It is recommended to keep Dart expressions in your Pug files. However, in some cases it can be practical to be able to set an expression as a CSS value, for example if flutter-view does not have special support for it.
Note the colon before TableCellVerticleAlignment.middlein the Sass file.
Using Flutter Themes in styles
To understand how it works, let's first look at how you would use it in pure Dart code. To assign a font size to a style, you may write something like this:
See the for more ideas for structuring your application.
To assign a class in pug, use the . Any div element becomes a Container widget.
Some examples are , , and . See the for the full list.
As an example, consider the following Pug layout we want to style (taken and converted into flutter-view Pug from the ):
The "buy tickets" and "listen" FlatButtons we want to have uppercase text. We can use the shortcut:
We want the card to be blue and the column of the card to have mainAxisSize: MainAxisSize.min:. Here we can use the shortcut, so we can use CSS colors, and the shortcut, which lets us simply use 'min':
We want to give some padding to the title and subtitle, and give each slightly different colors. and are shortcuts that adhere to CSS standards:
Flutter's Material library has . You may want to assign the values of the theme of the current BuildContext. Flutter-view has support for easily assigning values to your properties.
First we find the Theme of the current , then we get a path of properties.
This still requires the context to be available. If you have no current context, you can use the . The theme properties path has been replaced by dash-cased steps, separated by forward slashes/.
