excalibur-ui
v0.0.0-4
Published
A UI library for Excalibur.js
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Readme
excalibur-ui
⚠️ very much a work in progress ⚠️
Render UI in Excalibur.js games using JSX with SolidJS. It is recommended to be familiar with Solid before using this library.
Installation
excalibur-ui requires either Babel or Vite to compile the JSX.
Babel
npm install excalibur-ui solid-js babel-preset-solid
Update your .babelrc
file:
{
"presets": [
[
"babel-preset-solid",
{
"moduleName": "excalibur-ui",
"generate": "universal"
}
]
]
}
Vite
npm install excalibur-ui solid-js vite-plugin-solid
Update your vite config file:
import { defineConfig } from 'vite'
import solidPlugin from 'vite-plugin-solid'
export default defineConfig({
plugins: [
solidPlugin({
solid: {
moduleName: 'excalibur-ui',
generate: 'universal',
},
}),
],
})
Usage
UI can be rendered either on a Scene or Entity, and should be called once during onInitialize
.
import { renderUI } from 'excalibur-ui'
class Scene extends ex.Scene {
onInitialize() {
renderUI(this, () => {
return (
<ex-text
text="Hello World!"
pos={ex.vec(100, 100)}
color="#ffffff"
font={{
size: 50,
family: 'Arial',
}}
/>
)
})
}
}
class Actor extends ex.Actor {
onInitialize() {
renderUI(this, () => {
return (
<ex-text
text="Hello World!"
pos={ex.vec(100, 100)}
color="#ffffff"
font={{
size: 50,
family: 'Arial',
}}
/>
)
})
}
}
Using state
Since excalibur-ui is build on top of Solid, you can use signals and effects the same way you would in Solid components.
You may want to manage state at the entity/scene level using class properties, so excalibur-ui provides a useValue
hook that
will provide a signal that is updated every frame. You can use this to get values from the parent entity/scene.
import { useValue } from 'excalibur-ui'
class Actor extends ex.Actor {
onInitialize() {
this.pos = ex.vec(100, 100)
renderUI(this, () => {
const pos = useValue(() => this.pos)
return (
<ex-text
text="Hello World!"
pos={pos()}
color="#ffffff"
font={{
size: 50,
family: 'Arial',
}}
/>
)
})
}
}
HTML elements
All HTML elements are supported and render on top of the game canvas.
import { useValue } from 'excalibur-ui'
class Actor extends ex.Actor {
onInitialize() {
this.pos = ex.vec(100, 100)
renderUI(this, () => {
const screenPos = useValue(() =>
this.scene.engine.worldToScreenCoordinates(this.pos),
)
return (
<div
style={{
position: 'absolute',
top: `${screenPos().x}px`,
left: `${screenPos().y}px`,
color: 'white',
}}
>
hello world
</div>
)
})
}
}
Excalibur elements
There's a lot missing here, but currently you can use:
ex-view
ex-graphic
ex-text
ex-rectangle
and these will render as native Excalibur entities onto the scene.
class Scene extends ex.Scene {
onInitialize() {
renderUI(this, () => {
return (
<ex-view pos={ex.vec(100, 100)}>
<ex-graphic
graphic={new ex.Circle({ radius: 5, color: ex.Color.Red })}
/>
<ex-text
text="Hello World!"
pos={ex.vec(100, 100)}
color="#ffffff"
font={{
size: 50,
family: 'Arial',
}}
/>
<ex-rectangle
pos={ex.vec(100, 300)}
color="#ff4400"
width={140}
height={80}
/>
</ex-view>
)
})
}
}