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src/components/tree/node.vue 4.75 KB
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  <template>
      <transition name="slide-up">
          <ul :class="classes" v-show="visible">
              <li>
                  <span :class="arrowClasses" @click="handleExpand">
                      <Icon type="arrow-right-b"></Icon>
                  </span>
                  <Checkbox
                      v-if="showCheckbox"
                      :value="data.checked"
                      :indeterminate="indeterminate"
                      :disabled="data.disabled || data.disableCheckbox"
                      @click.native.prevent="handleCheck"></Checkbox>
                  <span :class="titleClasses" v-html="data.title" @click="handleSelect"></span>
                  <Tree-node
                      v-for="item in data.children"
                      :key="item"
                      :data="item"
                      :visible="data.expand"
                      :multiple="multiple"
                      :show-checkbox="showCheckbox">
                  </Tree-node>
              </li>
          </ul>
      </transition>
  </template>
  <script>
      import Checkbox from '../checkbox/checkbox.vue';
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      import Icon from '../icon/icon.vue';
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      import Emitter from '../../mixins/emitter';
      import { findComponentsDownward } from '../../utils/assist';
  
      const prefixCls = 'ivu-tree';
  
      export default {
          name: 'TreeNode',
          mixins: [ Emitter ],
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          components: { Checkbox, Icon },
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          props: {
              data: {
                  type: Object,
                  default () {
                      return {};
                  }
              },
              multiple: {
                  type: Boolean,
                  default: false
              },
              showCheckbox: {
                  type: Boolean,
                  default: false
              },
              visible: {
                  type: Boolean,
                  default: false
              }
          },
          data () {
              return {
                  prefixCls: prefixCls,
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                  indeterminate: false
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              };
          },
          computed: {
              classes () {
                  return [
                      `${prefixCls}-children`
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                  ];
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              },
              selectedCls () {
                  return [
                      {
                          [`${prefixCls}-node-selected`]: this.data.selected
                      }
                  ];
              },
              arrowClasses () {
                  return [
                      `${prefixCls}-arrow`,
                      {
                          [`${prefixCls}-arrow-disabled`]: this.data.disabled,
                          [`${prefixCls}-arrow-open`]: this.data.expand,
                          [`${prefixCls}-arrow-hidden`]: !(this.data.children && this.data.children.length)
                      }
                  ];
              },
              titleClasses () {
                  return [
                      `${prefixCls}-title`,
                      {
                          [`${prefixCls}-title-selected`]: this.data.selected
                      }
                  ];
              }
          },
          methods: {
              handleExpand () {
                  if (this.data.disabled) return;
                  this.$set(this.data, 'expand', !this.data.expand);
              },
              handleSelect () {
                  if (this.data.disabled) return;
                  if (this.data.selected) {
                      this.data.selected = false;
                  } else if (this.multiple) {
                      this.$set(this.data, 'selected', !this.data.selected);
                  } else {
                      this.dispatch('Tree', 'selected', this.data);
                  }
                  this.dispatch('Tree', 'on-selected');
              },
              handleCheck () {
                  if (this.disabled) return;
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                  const checked = !this.data.checked;
                  if (!checked || this.indeterminate) {
                      findComponentsDownward(this, 'TreeNode').forEach(node => node.data.checked = false);
                  } else {
                      findComponentsDownward(this, 'TreeNode').forEach(node => node.data.checked = true);
                  }
                  this.data.checked = checked;
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                  this.dispatch('Tree', 'checked');
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                  this.dispatch('Tree', 'on-checked');
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              },
              setIndeterminate () {
                  this.indeterminate = this.data.checked ? false : findComponentsDownward(this, 'TreeNode').some(node => node.data.checked);
              }
          },
          created () {
              // created node.vue first, mounted tree.vue second
              if (!this.data.checked) this.$set(this.data, 'checked', false);
          },
          mounted () {
              this.$on('indeterminate', () => {
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                  this.broadcast('TreeNode', 'indeterminate');
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                  this.setIndeterminate();
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              });
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          }
      };
  </script>