playchat/frontend/src/components/SidePanelMenu.vue

<script setup lang="ts">
import { computed, onMounted, onUnmounted, ref } from 'vue'
import { SIDE_PANELS, type PanelId } from '../panels'

const props = defineProps<{ active: PanelId | null }>()
const emit = defineEmits<{ (e: 'select', panel: PanelId | null): void }>()

const open = ref(false)
const root = ref<HTMLElement | null>(null)

const activePanel = computed(() => SIDE_PANELS.find((p) => p.id === props.active) ?? null)

/** 項目を選ぶ。開いているパネルをもう一度選んだら閉じる（従来のトグルと同じ操作感）。 */
function select(id: PanelId) {
  emit('select', props.active === id ? null : id)
  open.value = false
}

function close() {
  emit('select', null)
  open.value = false
}

function onDocumentPointerDown(e: PointerEvent) {
  if (open.value && !root.value?.contains(e.target as Node)) open.value = false
}

function onKeydown(e: KeyboardEvent) {
  if (e.key === 'Escape') open.value = false
}

onMounted(() => {
  document.addEventListener('pointerdown', onDocumentPointerDown)
  document.addEventListener('keydown', onKeydown)
})
onUnmounted(() => {
  document.removeEventListener('pointerdown', onDocumentPointerDown)
  document.removeEventListener('keydown', onKeydown)
})
</script>

<template>
  <div ref="root" class="panel-menu">
    <button
      class="menu-btn"
      :class="{ active: activePanel !== null, open }"
      :title="activePanel ? `${activePanel.label}を表示中` : 'パネルを開く'"
      @click="open = !open"
    >
      <span class="menu-icon">{{ activePanel ? activePanel.icon : '☰' }}</span>
      <span class="menu-label">{{ activePanel ? activePanel.label : 'パネル' }}</span>
      <span class="caret">▾</span>
    </button>

    <div v-if="open" class="dropdown">
      <button
        v-for="panel in SIDE_PANELS"
        :key="panel.id"
        class="item"
        :class="{ current: panel.id === active }"
        @click="select(panel.id)"
      >
        <span class="item-icon">{{ panel.icon }}</span>
        <span class="item-text">
          <span class="item-label">{{ panel.label }}</span>
          <span class="item-desc">{{ panel.description }}</span>
        </span>
        <span class="check">{{ panel.id === active ? '✓' : '' }}</span>
      </button>
      <button v-if="activePanel" class="item close-item" @click="close">
        <span class="item-icon">✕</span>
        <span class="item-text"><span class="item-label">パネルを閉じる</span></span>
        <span class="check" />
      </button>
    </div>
  </div>
</template>

<style scoped>
.panel-menu { position: relative; }
.menu-btn {
  display: flex; align-items: center; gap: 6px;
  background: #2a2a2a; color: #aaa; border: 1px solid #444;
  border-radius: 6px; padding: 4px 12px; font-size: 13px; cursor: pointer;
}
.menu-btn:hover { color: #ddd; }
.menu-btn.active { background: #1d3557; color: #93c5fd; border-color: #2563eb; }
.menu-btn.open { border-color: #666; }
.menu-btn.active.open { border-color: #3b82f6; }
.menu-icon { font-size: 13px; line-height: 1; }
.menu-label { white-space: nowrap; }
.caret { font-size: 9px; color: #777; }

.dropdown {
  position: absolute; top: calc(100% + 6px); right: 0; z-index: 50;
  min-width: 260px;
  background: #1c1c1c; border: 1px solid #3a3a3a; border-radius: 8px;
  padding: 4px; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
}
.item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  background: none; border: none; border-radius: 6px;
  padding: 7px 9px; cursor: pointer; text-align: left;
}
.item:hover { background: #262626; }
.item.current { background: #1d3557; }
.item-icon { font-size: 14px; width: 18px; text-align: center; flex-shrink: 0; }
.item-text { flex: 1; display: flex; flex-direction: column; gap: 1px; overflow: hidden; }
.item-label { color: #ddd; font-size: 13px; }
.item.current .item-label { color: #93c5fd; }
.item-desc {
  color: #6b7280; font-size: 11px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.check { color: #93c5fd; font-size: 11px; width: 10px; flex-shrink: 0; }
.close-item { border-top: 1px solid #2a2a2a; border-radius: 0 0 6px 6px; margin-top: 2px; }
.close-item .item-label { color: #888; }
</style>