feat: Add visual crop preview widget for ImageCrop node - widget ImageCrop

Author: jtydhr88

src/components/imagecrop/WidgetImageCrop.vue

@@ -0,0 +1,153 @@
+<template>
+  <div
+    class="widget-expands relative flex h-full w-full flex-col gap-1"
+    @pointerdown.stop
+    @pointermove.stop
+    @pointerup.stop
+  >
+    <!-- Number inputs row -->
+    <div class="flex shrink-0 gap-1 px-1">
+      <div class="flex flex-1 items-center gap-1">
+        <label class="w-6 text-xs text-muted">X</label>
+        <input
+          v-model.number="cropX"
+          type="number"
+          :min="0"
+          class="h-6 w-full rounded border border-border bg-input px-1 text-xs"
+          @change="handleInputChange"
+        />
+      </div>
+      <div class="flex flex-1 items-center gap-1">
+        <label class="w-6 text-xs text-muted">Y</label>
+        <input
+          v-model.number="cropY"
+          type="number"
+          :min="0"
+          class="h-6 w-full rounded border border-border bg-input px-1 text-xs"
+          @change="handleInputChange"
+        />
+      </div>
+      <div class="flex flex-1 items-center gap-1">
+        <label class="w-6 text-xs text-muted">W</label>
+        <input
+          v-model.number="cropWidth"
+          type="number"
+          :min="1"
+          class="h-6 w-full rounded border border-border bg-input px-1 text-xs"
+          @change="handleInputChange"
+        />
+      </div>
+      <div class="flex flex-1 items-center gap-1">
+        <label class="w-6 text-xs text-muted">H</label>
+        <input
+          v-model.number="cropHeight"
+          type="number"
+          :min="1"
+          class="h-6 w-full rounded border border-border bg-input px-1 text-xs"
+          @change="handleInputChange"
+        />
+      </div>
+    </div>
+
+    <!-- Image preview container -->
+    <div
+      ref="containerEl"
+      class="relative min-h-0 flex-1 overflow-hidden rounded-[5px] bg-node-component-surface"
+    >
+      <div v-if="isLoading" class="flex size-full items-center justify-center">
+        <span class="text-sm">{{ $t('imageCrop.loading') }}</span>
+      </div>
+
+      <div
+        v-else-if="!imageUrl"
+        class="flex size-full flex-col items-center justify-center text-center"
+      >
+        <i class="mb-2 icon-[lucide--image] h-12 w-12" />
+        <p class="text-sm">{{ $t('imageCrop.noInputImage') }}</p>
+      </div>
+
+      <img
+        v-else
+        ref="imageEl"
+        :src="imageUrl"
+        :alt="$t('imageCrop.cropPreviewAlt')"
+        draggable="false"
+        class="block size-full object-contain select-none brightness-50"
+        @load="handleImageLoad"
+        @error="handleImageError"
+        @dragstart.prevent
+      />
+
+      <div
+        v-if="imageUrl && !isLoading"
+        class="absolute box-border cursor-move overflow-hidden border-2 border-white"
+        :style="cropBoxStyle"
+        @pointerdown="handleDragStart"
+        @pointermove="handleDragMove"
+        @pointerup="handleDragEnd"
+      >
+        <div class="pointer-events-none size-full" :style="cropImageStyle" />
+      </div>
+
+      <div
+        v-for="handle in resizeHandles"
+        v-show="imageUrl && !isLoading"
+        :key="handle.direction"
+        :class="['absolute', handle.class]"
+        :style="handle.style"
+        @pointerdown="(e) => handleResizeStart(e, handle.direction)"
+        @pointermove="handleResizeMove"
+        @pointerup="handleResizeEnd"
+      />
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { useTemplateRef } from 'vue'
+
+import { useImageCrop } from '@/composables/useImageCrop'
+import type { NodeId } from '@/platform/workflow/validation/schemas/workflowSchema'
+
+export interface CropRegion {
+  x: number
+  y: number
+  width: number
+  height: number
+}
+
+const props = defineProps<{
+  nodeId: NodeId
+}>()
+
+const modelValue = defineModel<CropRegion>({
+  default: () => ({ x: 0, y: 0, width: 512, height: 512 })
+})
+
+const imageEl = useTemplateRef<HTMLImageElement>('imageEl')
+const containerEl = useTemplateRef<HTMLDivElement>('containerEl')
+
+const {
+  imageUrl,
+  isLoading,
+
+  cropX,
+  cropY,
+  cropWidth,
+  cropHeight,
+
+  cropBoxStyle,
+  cropImageStyle,
+  resizeHandles,
+
+  handleImageLoad,
+  handleImageError,
+  handleInputChange,
+  handleDragStart,
+  handleDragMove,
+  handleDragEnd,
+  handleResizeStart,
+  handleResizeMove,
+  handleResizeEnd
+} = useImageCrop(props.nodeId, { imageEl, containerEl, modelValue })
+</script>