app-qrcode.vue

<!--
**
**  HUDS - Head-Up-Display Server (HUDS)
**  Copyright (c) 2022-2024 Dr. Ralf S. Engelschall <rse@engelschall.com>
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<template>
    <div class="app-qrcode">
        <h2 class="title" style="grid-area: title">
            {{ $t("qrcode.qrcode-label") }}
        </h2>
        <div class="qrcode">
            <canvas ref="qrcode" class="canvas"></canvas>
        </div>
    </div>
</template>

<i18n lang="yaml">
en:
    qrcode:
        qrcode-label:    QR-CODE
de:
    qrcode:
        qrcode-label:    QR-CODE
</i18n>

<style lang="stylus">
.app-qrcode
    display: grid
    grid-template: "title" "qrcode"
    grid-gap: 2px
    .qrcode
        background-color: var(--color-std-bg-2)
        border-top: 1px solid var(--color-std-bg-1)
        border-left: 1px solid var(--color-std-bg-1)
        border-right: 1px solid var(--color-std-bg-5)
        border-bottom: 1px solid var(--color-std-bg-5)
        border-radius: 4px
        width: 100%
        display: flex
        flex-direction: row
        justify-content: center
        align-items: center
</style>

<script setup lang="ts">
import { defineComponent } from "vue"
import QRCode from "qrcode"
</script>

<script lang="ts">
export default defineComponent({
    name: "app-qrcode",
    data: () => ({
        url: window.location.href
    }),
    created () {
        window.addEventListener("hashchange", () => {
            this.url = window.location.href
        }, false)
    },
    mounted () {
        this.renderQRCode()
        this.$watch("url", () => {
            this.renderQRCode()
        })
    },
    methods: {
        renderQRCode () {
            QRCode.toCanvas(this.$refs.qrcode, this.url, {
                errorCorrectionLevel: "M",
                width: Math.min(360, window.innerWidth - 25),
                color: this.settings.opts.ui.theme === "dark" ?
                    { dark:  "#ffffffff", light: "#00000000" } :
                    { dark:  "#000000ff", light: "#ffffff00" }
            }, () => {})
        }
    }
})
</script>