Call a method open() on the component <mdl-dialog> by clicking on <mdl-button>

I am use component of the dialog window dialog.vue or <mdl-dialog>

<template>
<div class="mdl-dialog-container" v-show="show">
  <div class="mdl-dialog">
    <div class="mdl-dialog__title">{{title}}</div>
    <div class="mdl-dialog__content">
      <slot></slot>
    </div>
    <div class="mdl-dialog__actions" :class="actionsClasses">
      <slot name="actions">
        <mdl-button class="mdl-js-ripple-effect" @click.native.stop="close">Close</mdl-button>
      </slot>
    </div>
  </div>
</div>
</template>

<script>
import mdlButton from './button.vue'
import createFocusTrap from 'focus-trap'

export default {
  components: {
    mdlButton
  },

  computed: {
    actionsClasses () {
      return {
        'mdl-dialog__actions--full-width': this.fullWidth
      }
    }
  },

  data () {
    return {
      show: false
    }
  },

  props: {
    title: {
      type: String
    },
    fullWidth: Boolean
  },

  mounted () {
    this._focusTrap = createFocusTrap(this.$el)
  },

  methods: {
    open () {
      this.show = true
      this.$nextTick(() => this._focusTrap.activate())
      this.$emit('open')
    },
    close () {
      this.show = false
      this._focusTrap.deactivate()
      this.$emit('close')
    }
  }
}
</script>

I want to bring a dialog window to the other component

<mdl-dialog></mdl-dialog>
<button class="mdl-button mdl-js-button mdl-button--raised">Click me</button>

I found no information on how to call a method of one component within the other. All examples are mainly used props.

How can I call a method open() in <mdl-dialog></mdl-dialog>?

[posva]

  export default {
    name: 'index',
    data () {
      return {
        slogan: 'text',
        subSlogan: 'text'
      }
    },
    methods: {
      open () {
        this.$refs.register.open()
      }
    }
  }

then in button:

<button @click="open">...</button>

[LANSELOT]

It works, thanks)