Implement image selector

src/components/ImageCollection.vue

@@ -0,0 +1,42 @@
+<script setup lang="ts">
+import { ref } from "vue";
+
+defineEmits<{
+  selected: [image: HTMLImageElement]
+}>()
+
+const images = ref<HTMLImageElement[]>([]);
+
+function onFileChange(event: Event): void {
+  const files = (event.target as HTMLInputElement).files!;
+  const reader = new FileReader();
+  reader.onload = function(event) {
+    const image = new Image();
+    image.onload = () => images.value.push(image);
+    image.src = event.target!.result as string;
+  }
+  reader.readAsDataURL(files[0]);
+}
+</script>
+
+<template>
+  <div class="file-column">
+    <input id="file-upload" type="file" @change="onFileChange">
+    <label for="file-upload"><a class="button" style="display: block">Add</a></label>
+    <div v-for="(img, idx) in images" :key="idx" class="image-file">
+      <img :src="img.src" width="64" height="64" alt="" @click="$emit('selected', img)">
+    </div>
+  </div>
+</template>
+
+<style>
+#file-upload {
+  display: none;
+}
+.file-column {
+  display: flex;
+  flex-direction: column;
+  padding: 8px;
+  border-right: 1px solid black;
+}
+</style>

src/components/ImageEditor.vue

@@ -1,6 +1,7 @@
 <script setup lang="ts">
 import { onMounted, ref } from 'vue';
 import { grayScale } from "../processing/gray-scale.ts";
+import ImageCollection from "./ImageCollection.vue";
 
 const canvas = ref<HTMLCanvasElement | null>(null)
 let ctx: CanvasRenderingContext2D;
@@ -8,25 +9,28 @@ onMounted(() => {
   ctx = canvas.value!.getContext('2d')!;
 })
 
-function onFileChange(event: Event) {
-  const files = (event.target as HTMLInputElement).files!;
-  const reader = new FileReader();
-  reader.onload = function(event) {
-    const img = new Image();
-    img.onload = () => {
-      ctx.drawImage(img, 0, 0);
-      const imageData = ctx.getImageData(0, 0, img.width, img.height);
-      const pixels = imageData.data;
-      grayScale(pixels);
-      ctx.putImageData(imageData, 0, 0);
-    }
-    img.src = event.target!.result as string;
-  }
-  reader.readAsDataURL(files[0]);
+function onSelected(img: HTMLImageElement): void {
+  ctx.drawImage(img, 0, 0);
+  const imageData = ctx.getImageData(0, 0, img.width, img.height);
+  const pixels = imageData.data;
+  grayScale(pixels);
+  ctx.putImageData(imageData, 0, 0);
 }
 </script>
 
 <template>
-  <input type="file" @change="onFileChange">
-  <canvas ref="canvas" width="500" height="500"></canvas>
+  <div class="editor">
+    <ImageCollection @selected="onSelected" />
+    <canvas ref="canvas" width="500" height="500"></canvas>
+  </div>
 </template>
+
+<style>
+.editor {
+  display: flex;
+  box-shadow: 0 0 2px 2px #1a1a1a;
+}
+canvas {
+  flex-grow: 1;
+}
+</style>

src/style.css

@@ -35,22 +35,27 @@ h1 {
   line-height: 1.1;
 }
 
-button {
+button, .button {
   border-radius: 8px;
   border: 1px solid transparent;
   padding: 0.6em 1.2em;
+  margin-bottom: 8px;
   font-size: 1em;
   font-weight: 500;
   font-family: inherit;
   background-color: #1a1a1a;
   cursor: pointer;
   transition: border-color 0.25s;
+  color: inherit;
+  text-decoration: none;
 }
-button:hover {
+button:hover, .button:hover {
   border-color: #646cff;
 }
 button:focus,
-button:focus-visible {
+button:focus-visible,
+.button:focus,
+.button:focus-visible {
   outline: 4px auto -webkit-focus-ring-color;
 }