javascript - Open a Vuetify dialog from a component template in VueJS

Question

I'm using the VueJS Vuetify framework and I need to open a dialog - that gets imported as a component template - from another template. Once the Menu button in App.vue got clicked, the Modal should open. Here is my setup:

• App.vue = navigation template with Menu button
• Modal.vue = Modal template, imported as global in main.js

main.js

import Modal from './components/Modal.vue'
Vue.component('modal', Modal)

Modal.vue Template:

<template>
  <v-layout row justify-center>
    <v-btn color="primary" dark @click.native.stop="dialog = true">Open Dialog</v-btn>
    <v-dialog v-model="dialog" max-width="290">
      <v-card>
        <v-card-title class="headline">Use Google's location service?</v-card-title>
        <v-card-text>Let Google help apps determine location. This means sending anonymous location data to Google, even when no apps are running.</v-card-text>
        <v-card-actions>
          <v-spacer></v-spacer>
          <v-btn color="green darken-1" flat="flat" @click.native="dialog = false">Disagree</v-btn>
          <v-btn color="green darken-1" flat="flat" @click.native="dialog = false">Agree</v-btn>
        </v-card-actions>
      </v-card>
    </v-dialog>
  </v-layout>
</template>
<script>
  export default {
    data () {
      return {
        dialog: false
      }
    }
  }
</script>

How to open the dialog?

Answer 1

No event bus needed and v-model

Update:

When I first answered this, I posted my answer as a "workaround", since it didn't felt completely "right" at the time and I was new to Vue.js. I wanted to open or close the dialog by using a v-model directive, but I couldn't get there. After a time I found how to do this in the docs, using the input event and the value property, and here's how I think it should be done without an event bus.

Parent component:

<template>
   <v-btn color="accent" large @click.stop="showScheduleForm=true">    
   <ScheduleForm v-model="showScheduleForm" />
</template>

<script>
import ScheduleForm from '~/components/ScheduleForm'

export default {
  data () {
    return {
      showScheduleForm: false
    }
  },
  components: {
    ScheduleForm
  }
}
</script>

Child component (ScheduleForm):

<template>
<v-dialog v-model="show" max-width="500px">
  <v-card>
    <v-card-actions>
      <v-btn color="primary" flat @click.stop="show=false">Close</v-btn>
    </v-card-actions>
  </v-card>
</v-dialog>
</template>

<script>
export default {
  props: {
     value: Boolean
  },
  computed: {
    show: {
      get () {
        return this.value
      },
      set (value) {
         this.$emit('input', value)
      }
    }
  }
}
</script>

Original answer:

I was able to work around this without the need for a global event bus.

I used a computed property with a getter AND a setter. Since Vue warns you about mutating the parent property directly, in the setter I simply emitted an event to the parent.

Here's the code:

Parent component:

<template>
   <v-btn color="accent" large @click.stop="showScheduleForm=true"></v-btn>   
   <ScheduleForm :visible="showScheduleForm" @close="showScheduleForm=false" />
</template>

<script>
import ScheduleForm from '~/components/ScheduleForm'

export default {
  data () {
    return {
      showScheduleForm: false
    }
  },
  components: {
    ScheduleForm
  }
}
</script>

Child component (ScheduleForm):

<template>
<v-dialog v-model="show" max-width="500px">
  <v-card>
    <v-card-actions>
      <v-btn color="primary" flat @click.stop="show=false">Close</v-btn>
    </v-card-actions>
  </v-card>
</v-dialog>
</template>

<script>
export default {
  props: ['visible'],
  computed: {
    show: {
      get () {
        return this.visible
      },
      set (value) {
        if (!value) {
          this.$emit('close')
        }
      }
    }
  }
}
</script>