shadow control initial stuff. not done yet tho

src/components/shadow_control/shadow_control.js

@@ -0,0 +1,76 @@
+import ColorInput from '../color_input/color_input.vue'
+import OpacityInput from '../opacity_input/opacity_input.vue'
+import StyleSetter from '../../services/style_setter/style_setter.js'
+import { hex2rgb } from '../../services/color_convert/color_convert.js'
+import { set } from 'vue'
+
+export default {
+  props: [
+    'value', 'fallback'
+  ],
+  data () {
+    return {
+      selectedId: 0,
+      cValue: this.value || this.fallback
+    }
+  },
+  components: {
+    ColorInput,
+    OpacityInput
+  },
+  methods: {
+    add () {
+      this.cValue.push(Object.assign({}, this.selected))
+      this.selectedId = this.cValue.length - 1
+    },
+    del () {
+      this.cValue.splice(this.selectedId, 1)
+      this.selectedId = this.cValue.length === 0 ? undefined : this.selectedId - 1
+    },
+    moveUp () {
+      const movable = this.cValue.splice(this.selectedId, 1)[0]
+      this.cValue.splice(this.selectedId - 1, 0, movable)
+      this.selectedId -= 1
+    },
+    moveDn () {
+      const movable = this.cValue.splice(this.selectedId, 1)[0]
+      this.cValue.splice(this.selectedId + 1, 0, movable)
+      this.selectedId += 1
+    }
+  },
+  computed: {
+    selected () {
+      return this.cValue[this.selectedId] || {
+        x: 0,
+        y: 0,
+        blur: 0,
+        spread: 0,
+        inset: false,
+        color: '#000000',
+        alpha: 1
+      }
+    },
+    moveUpValid () {
+      return this.selectedId > 0
+    },
+    moveDnValid () {
+      return this.selectedId < this.cValue.length - 1
+    },
+    present () {
+      return typeof this.cValue[this.selectedId] !== 'undefined' &&
+        !this.usingFallback
+    },
+    usingFallback () {
+      return typeof this.value === 'undefined'
+    },
+    rgb () {
+      return hex2rgb(this.selected.color)
+    },
+    style () {
+      console.log(StyleSetter.generateShadow(this.cValue))
+      return {
+        boxShadow: StyleSetter.generateShadow(this.cValue)
+      }
+    }
+  }
+}