205 lines
9.2 KiB
Markdown
Executable File
205 lines
9.2 KiB
Markdown
Executable File
# font_awesome_flutter
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[](https://github.com/fluttercommunity/community)
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[](https://pub.dartlang.org/packages/font_awesome_flutter)
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The *free* [Font Awesome](https://fontawesome.com/icons) Icon pack available
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as set of Flutter Icons - based on font awesome version 6.5.1.
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This icon pack includes only the *free* icons offered by Font Awesome out-of-the-box.
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If you have purchased the pro icons and want to enable support for them, please see the instructions below.
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## Installation
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In the `dependencies:` section of your `pubspec.yaml`, add the following line:
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```yaml
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dependencies:
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font_awesome_flutter: <latest_version>
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```
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## Usage
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```dart
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import 'package:font_awesome_flutter/font_awesome_flutter.dart';
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class MyWidget extends StatelessWidget {
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Widget build(BuildContext context) {
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return IconButton(
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// Use the FaIcon Widget + FontAwesomeIcons class for the IconData
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icon: FaIcon(FontAwesomeIcons.gamepad),
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onPressed: () { print("Pressed"); }
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);
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}
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}
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```
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### Icon names
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Icon names equal those on the [official website](https://fontawesome.com/icons), but are written in lower camel case. If more than one icon style is available for an icon, the style name is used as prefix, except for "regular".
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Due to restrictions in dart, icons starting with numbers have those numbers written out.
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#### Examples:
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| Icon name | Code | Style|
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|---------------------------------------------------------------------------------------| --- | ---|
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| [angle-double-up](https://fontawesome.com/icons/angle-double-up?style=solid) | `FontAwesomeIcons.angleDoubleUp` | solid _(this icon does not have other free styles)_ |
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| [arrow-alt-circle-up](https://fontawesome.com/icons/arrow-alt-circle-up?style=regular) | `FontAwesomeIcons.arrowAltCircleUp` | regular |
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| [arrow-alt-circle-up](https://fontawesome.com/icons/arrow-alt-circle-up?style=solid) | `FontAwesomeIcons.solidArrowAltCircleUp` | solid |
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| [1](https://fontawesome.com/icons/1?style=solid) | `FontAwesomeIcons.solidOne` | solid |
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## Example App
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View the Flutter app in the `example` directory to see all the available `FontAwesomeIcons`.
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## Customizing font awesome flutter
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We supply a configurator tool to assist you with common customizations to this package.
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All options are interoperable.
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By default, if run without arguments and no `icons.json` in `lib/fonts` exists, it updates all icons to the
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newest free version of font awesome.
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### Setup
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To use your custom version, you must first clone [this repository](https://github.com/fluttercommunity/font_awesome_flutter.git)
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to a location of your choice and run `flutter pub get` inside. This installs all dependencies.
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The configurator is located in the `util` folder and can be started by running `configurator.bat` on Windows, or
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`./configurator.sh` on linux and mac. All following examples use the `.sh` version, but work same for `.bat`.
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(If on windows, omit the `./` or replace it with `.\`.)
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An overview of available options can be viewed with `./configurator.sh --help`.
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To use your customized version in an app, go to the app's `pubspec.yaml` and add a dependency for
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`font_awesome_flutter: '>= 4.7.0'`. Then override the dependency's location:
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```yaml
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dependencies:
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font_awesome_flutter: '>= 4.7.0'
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...
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dependency_overrides:
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font_awesome_flutter:
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path: path/to/your/font_awesome_flutter
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...
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```
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### Enable pro icons
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:exclamation: By importing pro icons you acknowledge that it is your obligation
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to keep these files private. This includes **not** uploading your package to
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a public github repository or other public file sharing services.
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* Go to the location of your custom font_awesome_flutter version (see [setup](#setup))
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* Download the web version of font awesome pro and open it
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* Move **all** `.ttf` files from the `webfonts` directory and `icons.json` from `metadata` to
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`path/to/your/font_awesome_flutter/lib/fonts`. Replace existing files.
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* Run the configurator. It should say "Custom icons.json found"
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It may be required to run `flutter clean` in apps who use this version for changes to appear.
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### Excluding styles
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One or more styles can be excluded from all generation processes by passing them with the `--exclude` option:
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```
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$ ./configurator.sh --exclude solid
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$ ./configurator.sh --exclude solid,brands
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```
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See the [optimizations](#what-about-file-size-and-ram-usage) and [dynamic icon retrieval by name](#retrieve-icons-dynamically-by-their-name-or-css-class)
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sections for more information as to why it makes sense for your app.
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### Retrieve icons dynamically by their name or css class
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Probably the most requested feature after support for pro icons is the ability to retrieve an icon by their name.
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This was previously not possible, because a mapping from name to icon would break all
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[discussed optimizations](#what-about-file-size-and-ram-usage). Please bear in mind that this is still the case.
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As all icons could theoretically be requested, none can be removed by flutter. It is strongly advised to only use this
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option in conjunction with [a limited set of styles](#excluding-styles) and with as few of them as possible. You may
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need to build your app with the `--no-tree-shake-icons` flag for it to succeed.
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Using the new configurator tool, this is now an optional feature. Run the tool with the `--dynamic` flag to generate...
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```
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$ ./configurator.sh --dynamic
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```
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...and the following import to use the map. For normal icons, use `faIconNameMapping` with a key of this format:
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'style icon-name'.
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```dart
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import 'package:font_awesome_flutter/name_icon_mapping.dart';
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...
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FaIcon(faIconNameMapping['solid abacus']);
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...
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```
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To exclude unused styles combine the configurator options:
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```
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$ ./configurator.sh --dynamic --exclude solid
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```
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A common use case also includes fetching css classes from a server. The utility function `getIconFromCss()` takes a
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string of classes and returns the icon which would be shown by a browser:
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```dart
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getIconFromCss('far custom-class fa-abacus'); // returns the abacus icon in regular style. custom-class is ignored
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```
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## Duotone icons
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Duotone support has been discontinued after font awesome changed the way they lay out the icon glyphs inside the font's
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file. The new way using ligatures is not supported by flutter at the moment.
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For more information on why duotone icon support was discontinued, see
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[this comment](https://github.com/fluttercommunity/font_awesome_flutter/issues/192#issuecomment-1073003668).
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## FAQ
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<details>
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<summary><h3>Why aren't the icons aligned properly or why are the icons being cut off?</h3></summary>
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Please use the `FaIcon` widget provided by the library instead of the `Icon`
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widget provided by Flutter. The `Icon` widget assumes all icons are square, but
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many Font Awesome Icons are not.
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</details>
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<details>
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<summary><h3>What about file size and ram usage</h3></summary>
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This package has been written in a way so that it only uses the minimum amount of resources required.
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All links (eg. `FontAwesomeIcons.abacus`) to unused icons will be removed automatically, which means only required icon
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definitions are loaded into ram.
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Flutter 1.22 added icon tree shaking. This means unused icon "images" will be removed as well. However, this only
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applies to styles of which at least one icon has been used. Assuming only icons of style "regular" are being used,
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"regular" will be minified to only include the used icons and "solid" and "brands" will stay in their raw, complete
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form. This issue is being [tracked over in the flutter repository](https://github.com/flutter/flutter/issues/64106).
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However, using the configurator, you can easily exclude styles from the package. For more information, see
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[customizing font awesome flutter](#customizing-font-awesome-flutter)
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</details>
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<details>
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<summary><h3>Why aren't the icons showing up on Mobile devices?</h3></summary>
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If you're not seeing any icons at all, sometimes it means that Flutter has a cached version of the app on device and
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hasn't pushed the new fonts. I've run into that as well a few times...
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Please try:
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1. Stopping the app
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2. Running `flutter clean` in your app directory
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3. Deleting the app from your simulator / emulator / device
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4. Rebuild & Deploy the app.
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</details>
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<details>
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<summary><h3>Why aren't the icons showing up on Web?</h3></summary>
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Most likely, the fonts were not correctly added to the `FontManifest.json`.
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Note: older versions of Flutter did not properly package non-Material fonts
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in the `FontManifest.json` during the build step, but that issue has been
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resolved and this shouldn't be much of a problem these days.
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Please ensure you are using `Flutter 1.14.6 beta` or newer!
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</details>
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<details>
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<summary><h3>Why does mac/linux not run the configurator?</h3></summary>
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This is most probably due to missing file permissions. Downloaded scripts cannot be executed by default.
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Either give the execute permission to `util/configurator.sh` with `$ chmod +x configurator.sh` or run the commands by prepending an `sh`:
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`$ sh ./configurator.sh`
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</details>
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