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#30 in Rendering

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Apache-2.0

340KB
5.5K SLoC

bevy_extended_ui

Since I've been writing a game in the Bevy engine lately, I created this crate. In my game, I need more complex UI elements that aren't currently supported by Bevy. These include sliders, choice boxes, check boxes, radio buttons, and so on. So I set about implementing these elements using the standard bevy_ui system. I'd like to make this project available to you so that you can use elements other than just nodes, buttons, or images. If you're missing a widget and know how to create it, it would be great if you could add it. Otherwise, feel free to create a ticket.

Note: This project is currently under construction and not suitable for large projects!.

Example

Here I will show you how to use the bevy_extended_ui:

First we need to integrate the plugin into your project.

fn main() {
  let _ = App::new()
          .add_plugins((DefaultPlugins, ExtendedUiPlugin))
          .run();
}

Next, you can get started right away. Currently, there are widgets (Div, Button, Checkbox, InputField, and Slider). Note that these aren't all the widgets! More are coming soon.

Here's a simple example of a button that we spawn

    commands.spawn((
        Div::default(),
        CssSource(String::from("test.css")),
        CssClass(vec![".div-test".to_string(), ".div-override".to_string()]),
        children![
            Button::default(),
            Button::default()
        ]
    ));

Here is an example of some widgets:

HTML works now with bevy_extended_ui. You can show the html from your website in bevy! But currently these widgets ar supported:

Button
Div
Body
H1 - H6
Paragraph
Slider
Select
Input type:number, text and password
ProgressBar

    commands.spawn(HtmlSource::from_file_path("examples/html/login-ui.html"));

The html file needed a head element which contains a <meta name="test"> tag, this is used for identify the correct ui which you currently need.

New HTML Controller Support

You can now use controller for handle functions from html like onclick or onmouseennter for interact with the html file. See a full example at the examples/ package!

For implement css styling use <link href="css/example.css" ref="text/css">. At the moment only one css at the same time is supported! Here is an example html:

<head>
    <meta name="login-example" />
    <meta controller="controller/login_controller.rs" />
    <link rel="stylesheet" href="examples/css/login-ui.css" />
    <title>Page Title</title>
</head>

<body>
<!-- Login Page -->
<div id="container">
    <!-- Login headline -->
    <h2>Login</h2>

    <!-- Input Field with type text and an icon -->
    <label for="username">Username</label>
    <input id="username" type="text" icon="icons/user-icon.png" />

    <!-- Input Field with type password and an icon -->
    <label for="password">Password</label>
    <input id="password" type="password" icon="icons/pass-icon.png" />

    <!-- Remember me -->
    <checkbox id="remember-me">Remember me</checkbox>

    <!-- Forgot password -->
    <p>Forgot password?</p>

    <!-- Login container -->
    <div class="button-container">
        <button id="login">
            Login
        </button>
    </div>
</div>
</body>

All Widgets support CSS3 and can apply many of the default css rules. Note that the current system working with css but not perfect yet! Let me explain it:

button {
    background: rgb(255, 255, 255); /* will be white */
    display: flex; /* set node display flex */
}

button:hover {
    background: rgba(200, 200, 200, 200); /* will work correctly */
}

.button-text {
    color: #FFFFFF; /* is white and working */
}

/* THIS WORK IF THE BUTTON IS HOVERED! */
.button-text:hover {
    color: red; /* set red */
}

/* THIS WILL WORK TOO! */
button:hover .button-text {
    color: red; /* set red */
}

Examples

For more examples, look at the example package. If you need help with CSS rules, look at CSS_SUPPORT.md in the same folder! The crate supports many CSS things, the list below shows the future support:

CSS variables
CSS Animations @keyframes
CSS media queries
& ~ > Operators
SCSS support

`Bevy` version	`bevy_extended_ui` version
0.16.1	0.1.0 - 0.2.1
0.16.0	0.1.0 - 0.2.1

Important Links

Link to Css rules

Link to Widget attributes

Dependencies

~78–115MB
~2M SLoC