Property Panels

Property panels in @open-pencil/vue are intentionally composable-first.

If a panel mostly needs selection-derived values and update actions, prefer composables. If a panel needs reusable array/list structure, use a headless primitive like PropertyListRoot.

Common control composables

For standard property sections, start with:

• usePosition()
• useLayout()
• useAppearance()
• useTypography()
• useExport()

For list-style panels, use:

• useFillControls()
• useStrokeControls()
• useEffectsControls()

Example: position panel

<script setup lang="ts">
import { usePosition } from '@open-pencil/vue'

const { x, y, width, height, updateProp, commitProp } = usePosition()
</script>

<template>
  <div class="grid grid-cols-2 gap-2">
    <input :value="x" @input="updateProp('x', Number(($event.target as HTMLInputElement).value))" />
    <input :value="y" @input="updateProp('y', Number(($event.target as HTMLInputElement).value))" />
    <input :value="width" @input="updateProp('width', Number(($event.target as HTMLInputElement).value))" />
    <input :value="height" @input="updateProp('height', Number(($event.target as HTMLInputElement).value))" />
  </div>
</template>

Example: fills panel

<script setup lang="ts">
import { PropertyListRoot, useFillControls } from '@open-pencil/vue'

const fillControls = useFillControls()
</script>

<template>
  <PropertyListRoot prop-key="fills" v-slot="{ items, add, remove }">
    <div v-for="(fill, index) in items" :key="index">
      {{ fill.type }}
      <button @click="remove(index)">Remove</button>
    </div>

    <button @click="add(fillControls.defaultFill)">Add fill</button>
  </PropertyListRoot>
</template>

Rule of thumb

• use composables for direct control logic
• use structural primitives when repeated list/tree/slot coordination is the hard part

Related APIs

• usePosition
• useLayout
• useAppearance
• useTypography
• useFillControls
• useStrokeControls
• useEffectsControls
• PropertyListRoot