<template>
  <div>
    <p class="tip">
      可编辑树表格的懒加载
    </p>

    <vxe-toolbar>
      <template #buttons>
        <vxe-button @click="getUpdateEvent">获取修改</vxe-button>
      </template>
    </vxe-toolbar>

    <vxe-table
      border
      show-overflow
      resizable
      keep-source
      ref="xTree"
      row-id="id"
      :edit-config="{trigger: 'click', mode: 'row', showStatus: true}"
      :tree-config="{lazy: true, children: 'children', hasChild: 'hasChild', loadMethod: loadChildrenMethod}"
      :data="tableData">
      <vxe-table-column field="name" title="Name" width="260" tree-node :edit-render="{name: 'input'}"></vxe-table-column>
      <vxe-table-column field="size" title="Size" :edit-render="{name: 'input'}"></vxe-table-column>
      <vxe-table-column field="type" title="Type" :edit-render="{name: 'input'}"></vxe-table-column>
      <vxe-table-column field="date" title="Date" :edit-render="{name: '$input', props: {type: 'date'}}"></vxe-table-column>
    </vxe-table>

    <p class="demo-code">{{ $t('app.body.button.showCode') }}</p>

    <pre>
      <pre-code class="xml">{{ demoCodes[0] }}</pre-code>
      <pre-code class="javascript">{{ demoCodes[1] }}</pre-code>
    </pre>
  </div>
</template>

<script>
export default {
  data () {
    return {
      tableData: [
        { id: 1000, name: 'vxe-table 从入门到放弃1', type: 'mp3', size: 1024, date: '2020-08-01' },
        { id: 1005, name: 'Test2', type: 'mp4', size: null, date: '2021-04-01', hasChild: true },
        { id: 23666, name: 'Test23', type: 'mp4', size: null, date: '2021-01-02', hasChild: true },
        { id: 24555, name: 'vxe-table 从入门到放弃9', type: 'avi', size: 224, date: '2020-10-01' }
      ],
      demoCodes: [
        `
        <vxe-toolbar>
          <template #buttons>
            <vxe-button @click="getUpdateEvent">获取修改</vxe-button>
          </template>
        </vxe-toolbar>

        <vxe-table
          border
          show-overflow
          resizable
          keep-source
          ref="xTree"
          row-id="id"
          :edit-config="{trigger: 'click', mode: 'row', showStatus: true}"
          :tree-config="{lazy: true, children: 'children', hasChild: 'hasChild', loadMethod: loadChildrenMethod}"
          :data="tableData">
          <vxe-table-column field="name" title="Name" width="260" tree-node :edit-render="{name: 'input'}"></vxe-table-column>
          <vxe-table-column field="size" title="Size" :edit-render="{name: 'input'}"></vxe-table-column>
          <vxe-table-column field="type" title="Type" :edit-render="{name: 'input'}"></vxe-table-column>
          <vxe-table-column field="date" title="Date" :edit-render="{name: '$input', props: {type: 'date'}}"></vxe-table-column>
        </vxe-table>
        `,
        `
        export default {
          data () {
            return {
              tableData: [
                { id: 1000, name: 'vxe-table 从入门到放弃1', type: 'mp3', size: 1024, date: '2020-08-01' },
                { id: 1005, name: 'Test2', type: 'mp4', size: null, date: '2021-04-01', hasChild: true },
                { id: 23666, name: 'Test23', type: 'mp4', size: null, date: '2021-01-02', hasChild: true },
                { id: 24555, name: 'vxe-table 从入门到放弃9', type: 'avi', size: 224, date: '2020-10-01' }
              ]
            }
          },
          methods: {
            loadChildrenMethod ({ row }) {
              // 异步加载子节点
              return new Promise(resolve => {
                setTimeout(() => {
                  const childs = [
                    { id: row.id + 100000, name: row.name + 'Test45', type: 'mp4', size: null, date: '2021-10-03', hasChild: true },
                    { id: row.id + 150000, name: row.name + 'Test56', type: 'mp3', size: null, date: '2021-07-09', hasChild: false }
                  ]
                  resolve(childs)
                }, 500)
              })
            },
            getUpdateEvent () {
              const updateRecords = this.$refs.xTree.getUpdateRecords()
              this.$XModal.alert(updateRecords.length)
            }
          }
        }
        `
      ]
    }
  },
  methods: {
    loadChildrenMethod ({ row }) {
      // 异步加载子节点
      return new Promise(resolve => {
        setTimeout(() => {
          const childs = [
            { id: row.id + 100000, name: row.name + 'Test45', type: 'mp4', size: null, date: '2021-10-03', hasChild: true },
            { id: row.id + 150000, name: row.name + 'Test56', type: 'mp3', size: null, date: '2021-07-09', hasChild: false }
          ]
          resolve(childs)
        }, 500)
      })
    },
    getUpdateEvent () {
      const updateRecords = this.$refs.xTree.getUpdateRecords()
      this.$XModal.alert(updateRecords.length)
    }
  }
}
</script>
