MapComplete/UI/Image/SlideShow.ts

import { Store, UIEventSource } from "../../Logic/UIEventSource"
import BaseUIElement from "../BaseUIElement"
import { Utils } from "../../Utils"
import Combine from "../Base/Combine"

export class SlideShow extends BaseUIElement {
    private readonly embeddedElements: Store<BaseUIElement[]>

    constructor(embeddedElements: Store<BaseUIElement[]>) {
        super()
        this.embeddedElements = embeddedElements
        this.SetStyle("scroll-snap-type: x mandatory; overflow-x: auto")
    }

    protected InnerConstructElement(): HTMLElement {
        const el = document.createElement("div")
        el.style.minWidth = "min-content"
        el.style.display = "flex"
        el.style.justifyContent = "center"
        this.embeddedElements.addCallbackAndRun((elements) => {
            if (elements.length > 1) {
                el.style.justifyContent = "unset"
            }

            while (el.firstChild) {
                el.removeChild(el.lastChild)
            }

            elements = Utils.NoNull(elements).map((el) =>
                new Combine([el])
                    .SetClass("block relative ml-1 bg-gray-200 m-1 rounded slideshow-item")
                    .SetStyle(
                        "min-width: 150px; width: max-content; height: var(--image-carousel-height);max-height: var(--image-carousel-height);scroll-snap-align: start;"
                    )
            )

            for (const element of elements ?? []) {
                el.appendChild(element.ConstructElement())
            }
        })

        const wrapper = document.createElement("div")
        wrapper.style.maxWidth = "100%"
        wrapper.style.overflowX = "auto"
        wrapper.appendChild(el)
        return wrapper
    }
}