问Vue.js对话框/模式在父组件上关闭

EN

<template>
    <v-dialog
        v-model="show"
    >
        <v-card>
            <v-card-actions>
                <v-container grid-list-md text-xs-center>
                    <v-layout row wrap>

                    </v-layout>
                </v-container>
            </v-card-actions>
        </v-card>
    </v-dialog>
</template>

<script>
import CanvasPreviewSourceUpload from './CanvasPreviewSourceUpload';

export default {
    components: {
        'canvas-preview-source-upload': CanvasPreviewSourceUpload
    },

    props: {
        imgSrc: String,
        visible: Boolean   
    },

    computed: {
        show: {
            get () {
                return this.visible;
            },
            set (visible) {
                if (!visible) {
                    this.$emit('closePreview');
                }
            }
        }
    },
}
</script>

<template>
    <div>
        //... some more html
        <div id="canvas-body">
            <canvas id="pdf-render"></canvas>
            <canvas id="selectCanvas"
                @mousedown="markElementOnMouseDown"
                @mousemove="updatePreview"
                @mouseup="markElementOnMouseUp">
            </canvas>
        </div>

       <canvas-preview
            :imgSrc="this.targetImage.src"
            :visible="showCanvasPreview"
            @closePreview="showCanvasPreview=false">
        </canvas-preview>
    </div>
</template>


<script>
import CanvasPreview from '@/js/components/CanvasPreview';

export default {
    components: {
        'canvas-preview': CanvasPreview
    },

    props: {
        'name': String
    },

    data: () => ({
        showCanvasPreview: false,
        ...
    }),

    methods: {
        markElementOnMouseUp (event) {
            this.isDragging = false;
            this.targetImage.src = this.clipCanvas.toDataURL();
            this.targetImage.style.display = 'block';

            this.showCanvasPreview = true;
            console.log("mouseup: " + this.showCanvasPreview);
        },
    }
</script>