feat(VDataTable): enhance data-table "color" prop

[cmgdragon]

Description

Makes it easier to change the color of the selection checkboxes, the loader and the selected item in the pages dropdown.

The color prop in v-data-table is being underused. So far it's only changing the color of the header badges when multi-sort is enabled.

When I set the color prop it's because I want to customize the appareance of the table to match the desired color wherever it makes sense and not only to a very specific -almost hidden- part of it. It gives the feeling that the color prop isn't changing anything.

In V2 we had a checkboxColor prop for changing the color of the selection checkboxes, but I think this could be just handled by the color prop itself.

In addition, I have made the loader component follow the color while still respecting the value you pass to the loading prop if a color is provided.

Lastly I made the page dropdown also follow the color for the current page selected.

Using the color prop in these three addtional places will provide a quick look and feel customization of the data-tables enhancing the usage of the prop.

Markup:

<template>
  <v-app>
    <v-container>

      <div class="text-center">
        <v-btn
          :disabled="loading"
          append-icon="mdi-refresh"
          text="Refresh"
          @click="onClick"
        ></v-btn>
      </div>

      <v-data-table
        color="red-darken-3"
        :loading="loading"
        v-model="selected"
        :items="items"
        item-value="name"
        show-select
      ></v-data-table>

      <v-data-table
        color="#1A237E"
        :loading="loading"
        :group-by="groupBy"
        :headers="headers"
        :items="desserts"
        item-value="name"
        show-select
        v-model="selected2"
      >
        <template v-slot:group-header="{ item, columns, toggleGroup, isGroupOpen }">
          <tr>
            <td :colspan="columns.length">
              <VBtn
                :icon="isGroupOpen(item) ? '$expand' : '$next'"
                size="small"
                variant="text"
                @click="toggleGroup(item)"
              ></VBtn>
              {{ item.value ? 'Contains gluten' : 'Gluten free' }}
            </td>
          </tr>
        </template>
      </v-data-table>

    </v-container>
  </v-app>
</template>

<script setup>
  import { ref } from 'vue'

  const loading = ref(false)

  function onClick () {
    loading.value = true
    setTimeout(() => {
      loading.value = false
    }, 2000)
  }

  const selected = ref([])
  const selected2 = ref([])
  const items = [
    {
      name: '🍎 Apple',
      location: 'Washington',
      height: '0.1',
      base: '0.07',
      volume: '0.0001',
    },
    {
      name: '🍌 Banana',
      location: 'Ecuador',
      height: '0.2',
      base: '0.05',
      volume: '0.0002',
    },
    {
      name: '🍇 Grapes',
      location: 'Italy',
      height: '0.02',
      base: '0.02',
      volume: '0.00001',
    }
  ]

  const groupBy = ref([
    {
      key: 'gluten',
      order: 'asc',
    },
  ])

  const headers = [
    {
      title: 'Dessert (100g serving)',
      align: 'start',
      sortable: false,
      key: 'name',
    },
    { title: 'Calories', key: 'calories' },
    { title: 'Fat (g)', key: 'fat' },
    { title: 'Carbs (g)', key: 'carbs' },
    { title: 'Protein (g)', key: 'protein' },
    { title: 'Iron (%)', key: 'iron' },
  ]
  const desserts = [
    {
      name: 'Frozen Yogurt',
      calories: 159,
      fat: 6,
      carbs: 24,
      protein: 4,
      iron: '1%',
      gluten: false,
    },
    {
      name: 'Ice cream sandwich',
      calories: 237,
      fat: 9,
      carbs: 37,
      protein: 4.3,
      iron: '1%',
      gluten: false,
    },
    {
      name: 'Eclair',
      calories: 262,
      fat: 16,
      carbs: 23,
      protein: 6,
      iron: '7%',
      gluten: true,
    },
    {
      name: 'Cupcake',
      calories: 305,
      fat: 3.7,
      carbs: 67,
      protein: 4.3,
      iron: '8%',
      gluten: true,
    },
  ]
</script>