From 9ad6ed45da5f04a3bdba86a7457e276a4f143a7e Mon Sep 17 00:00:00 2001
From: Bernd Storath <999999bst@gmail.com>
Date: Thu, 5 Mar 2026 13:02:19 +0100
Subject: [PATCH] copy & download qr code as png

---
 src/app/app.css                             |  7 ++
 src/app/components/Clients/QRCodeDialog.vue | 73 ++++++++++++++++++++-
 src/app/components/Header/ChartToggle.vue   |  4 +-
 src/app/components/Icons/Copy.vue           |  7 ++
 src/nuxt.config.ts                          |  1 +
 5 files changed, 89 insertions(+), 3 deletions(-)
 create mode 100644 src/app/app.css
 create mode 100644 src/app/components/Icons/Copy.vue

diff --git a/src/app/app.css b/src/app/app.css
new file mode 100644
index 00000000..afa0ee69
--- /dev/null
+++ b/src/app/app.css
@@ -0,0 +1,7 @@
+:root {
+  color-scheme: light;
+}
+
+.dark {
+  color-scheme: dark;
+}
diff --git a/src/app/components/Clients/QRCodeDialog.vue b/src/app/components/Clients/QRCodeDialog.vue
index c182150b..7332dd94 100644
--- a/src/app/components/Clients/QRCodeDialog.vue
+++ b/src/app/components/Clients/QRCodeDialog.vue
@@ -5,10 +5,16 @@
     </template>
     <template #description>
       <div class="bg-white">
-        <img :src="qrCode" />
+        <img ref="img" :src="qrCode" />
       </div>
     </template>
     <template #actions>
+      <BaseSecondaryButton class="flex items-center gap-2" @click="copyPng">
+        <IconsCopy class="size-5" /> PNG
+      </BaseSecondaryButton>
+      <BaseSecondaryButton class="flex items-center gap-2" @click="downloadPng">
+        <IconsDownload class="size-5" /> PNG
+      </BaseSecondaryButton>
       <DialogClose as-child>
         <BaseSecondaryButton>{{ $t('dialog.cancel') }}</BaseSecondaryButton>
       </DialogClose>
@@ -18,4 +24,69 @@
 
 <script setup lang="ts">
 defineProps<{ qrCode: string }>();
+
+const img = useTemplateRef('img');
+
+async function svgToPng() {
+  if (!img.value || !img.value.complete || img.value.naturalWidth === 0) {
+    throw new Error('image is not loaded');
+  }
+
+  const width = 1000;
+  const height = 1000;
+
+  const canvas = document.createElement('canvas');
+  canvas.width = width;
+  canvas.height = height;
+  const ctx = canvas.getContext('2d');
+  if (!ctx) {
+    throw new Error('was not able to create 2d context');
+  }
+  ctx.drawImage(img.value!, 0, 0, width, height);
+
+  return new Promise<Blob>((res, rej) => {
+    canvas.toBlob((blob) => {
+      if (!blob) {
+        return rej(new Error('was not able to create blob'));
+      }
+      return res(blob);
+    }, 'image/png');
+  });
+}
+
+async function downloadPng() {
+  const blob = await svgToPng();
+
+  const url = URL.createObjectURL(blob);
+  const a = document.createElement('a');
+  a.href = url;
+  a.download = 'client-config.png';
+  document.body.appendChild(a);
+  a.click();
+  document.body.removeChild(a);
+  URL.revokeObjectURL(url);
+}
+
+async function copyPng() {
+  const blob = await svgToPng();
+
+  try {
+    await navigator.clipboard.write([
+      new ClipboardItem({
+        [blob.type]: blob,
+      }),
+    ]);
+
+    useToast().showToast({
+      type: 'success',
+      message: $t('copy.copied'),
+    });
+  } catch (e) {
+    console.error('failed to copy png', e);
+    useToast().showToast({
+      type: 'error',
+      message: $t('copy.failed'),
+    });
+  }
+}
 </script>
diff --git a/src/app/components/Header/ChartToggle.vue b/src/app/components/Header/ChartToggle.vue
index 9ebb8be1..4b282933 100644
--- a/src/app/components/Header/ChartToggle.vue
+++ b/src/app/components/Header/ChartToggle.vue
@@ -1,12 +1,12 @@
 <template>
   <Toggle
     :pressed="globalStore.uiShowCharts"
-    class="group inline-flex h-8 w-8 cursor-pointer items-center justify-center whitespace-nowrap rounded-full bg-gray-200 transition hover:bg-gray-300 dark:bg-neutral-700 dark:hover:bg-neutral-600"
+    class="group flex h-8 w-8 items-center justify-center rounded-full bg-gray-200 transition hover:bg-gray-300 dark:bg-neutral-700 dark:hover:bg-neutral-600"
     :title="$t('layout.toggleCharts')"
     @update:pressed="globalStore.toggleCharts"
   >
     <IconsChart
-      class="h-5 w-5 fill-gray-400 transition group-data-[state=on]:fill-gray-600 dark:fill-neutral-600 dark:group-data-[state=on]:fill-neutral-400"
+      class="h-5 w-5 transition group-data-[state=on]:fill-gray-600 dark:text-neutral-400 dark:group-data-[state=on]:fill-gray-300"
     />
   </Toggle>
 </template>
diff --git a/src/app/components/Icons/Copy.vue b/src/app/components/Icons/Copy.vue
new file mode 100644
index 00000000..188e46e3
--- /dev/null
+++ b/src/app/components/Icons/Copy.vue
@@ -0,0 +1,7 @@
+<template>
+  <ClipboardDocumentIcon />
+</template>
+
+<script lang="ts" setup>
+import ClipboardDocumentIcon from '@heroicons/vue/24/outline/esm/ClipboardDocumentIcon';
+</script>
diff --git a/src/nuxt.config.ts b/src/nuxt.config.ts
index 64add686..c3911b77 100644
--- a/src/nuxt.config.ts
+++ b/src/nuxt.config.ts
@@ -23,6 +23,7 @@ export default defineNuxtConfig({
     classSuffix: '',
     cookieName: 'theme',
   },
+  css: ['~/app.css'],
   i18n: {
     // https://i18n.nuxtjs.org/docs/guide/server-side-translations
     experimental: {