437 lines
10 KiB
Plaintext
437 lines
10 KiB
Plaintext
<template>
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<div style="width:100%;height:100%;">
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<transition name="viewer-fade">
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<div v-show="urlList.length > 0" ref="image-viewer__wrapper" tabindex="-1" class="image-viewer__wrapper" :style="{ 'z-index':999 }">
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<span class="image-viewer_desc">
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<!-- <span v-if="studyCode">NST00006</span>
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<span v-if="modality">CT</span>
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<span v-if="bodyPart">上/下腹部</span><br> -->
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{{ `${index+1} / ${urlList.length}` }}
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</span>
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<!-- 关闭 -->
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<span class="image-viewer__btn image-viewer__close" @click="hide">
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<i class="el-icon-close" />
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</span>
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<!-- Arrow -->
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<template v-if="!isSingle">
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<span
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class="image-viewer__btn image-viewer__prev"
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:class="{ 'is-disabled': !infinite && isFirst }"
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@click="prev"
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>
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<i class="el-icon-arrow-left" />
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</span>
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<span
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class="el-image-viewer__btn el-image-viewer__next"
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:class="{ 'is-disabled': !infinite && isLast }"
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@click="next"
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>
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<i class="el-icon-arrow-right" />
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</span>
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</template>
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<!-- 工具栏 -->
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<div class="image-viewer__btn image-viewer__actions">
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<div class="image-viewer__actions__inner">
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<i class="el-icon-zoom-out" @click="handleActions('zoomOut')" />
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<i class="el-icon-zoom-in" @click="handleActions('zoomIn')" />
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<i class="el-image-viewer__actions__divider" />
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<i class="el-icon-c-scale-to-original" @click="toggleMode" />
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<i class="el-image-viewer__actions__divider" />
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<i class="el-icon-refresh-left" @click="handleActions('anticlocelise')" />
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<i class="el-icon-refresh-right" @click="handleActions('clocelise')" />
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</div>
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</div>
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<!-- 图片 -->
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<div class="image-viewer__canvas">
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<img
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v-for="(item, i) in urlList"
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v-show="i === index"
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:ref="`img${i}`"
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:key="item.Id"
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:src="`/api/${item.FullFilePath}`"
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:style="imgStyle"
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style="max-width:100%;max-height: 100%;"
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@load="handleImgLoad"
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@error="handleImgError"
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@mousedown="handleMouseDown"
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>
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</div>
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</div>
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</transition>
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</div>
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</template>
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<script>
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import { on, off } from 'element-ui/src/utils/dom'
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import { rafThrottle, isFirefox } from 'element-ui/src/utils/util'
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const mousewheelEventName = isFirefox() ? 'DOMMouseScroll' : 'mousewheel'
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export default {
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name: 'ImageViewer',
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props: {
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urlList: {
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type: Array,
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default: () => []
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},
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studyCode: {
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type: String,
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default: ''
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},
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bodyPart: {
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type: String,
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default: ''
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},
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modality: {
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type: String,
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default: ''
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},
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onSwitch: {
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type: Function,
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default: () => {}
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},
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onClose: {
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type: Function,
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default: () => {}
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},
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initialIndex: {
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type: Number,
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default: 0
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}
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},
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data() {
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return {
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index: this.initialIndex,
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isShow: false,
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infinite: true,
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loading: false,
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transform: {
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scale: 1,
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deg: 0,
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offsetX: 0,
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offsetY: 0,
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enableTransition: false
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}
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}
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},
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computed: {
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isSingle() {
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return this.urlList.length <= 1
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},
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isFirst() {
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return this.index === 0
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},
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isLast() {
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return this.index === this.urlList.length - 1
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},
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imgStyle() {
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const { scale, deg, offsetX, offsetY, enableTransition } = this.transform
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const style = {
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transform: `scale(${scale}) rotate(${deg}deg)`,
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transition: enableTransition ? 'transform .3s' : '',
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'margin-left': `${offsetX}px`,
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'margin-top': `${offsetY}px`
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}
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return style
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}
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},
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watch: {
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initialIndex: {
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immediate: true,
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handler(val) {
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this.index = val
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}
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},
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index: {
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immediate: true,
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handler(val) {
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this.reset()
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this.onSwitch(val)
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}
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}
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},
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mounted() {
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this.deviceSupportInstall()
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},
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methods: {
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hide() {
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this.deviceSupportUninstall()
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this.onClose()
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},
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deviceSupportInstall() {
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this._keyDownHandler = e => {
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e.stopPropagation()
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const keyCode = e.keyCode
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switch (keyCode) {
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// ESC
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case 27:
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this.hide()
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break
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// SPACE
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case 32:
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this.toggleMode()
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break
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// LEFT_ARROW
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case 37:
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this.prev()
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break
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// UP_ARROW
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case 38:
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this.handleActions('zoomIn')
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break
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// RIGHT_ARROW
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case 39:
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this.next()
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break
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// DOWN_ARROW
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case 40:
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this.handleActions('zoomOut')
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break
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}
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}
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this._mouseWheelHandler = rafThrottle(e => {
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const delta = e.wheelDelta ? e.wheelDelta : -e.detail
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if (delta > 0) {
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this.handleActions('zoomIn', {
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zoomRate: 0.015,
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enableTransition: false
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})
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} else {
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this.handleActions('zoomOut', {
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zoomRate: 0.015,
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enableTransition: false
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})
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}
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})
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on(document, 'keydown', this._keyDownHandler)
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on(document, mousewheelEventName, this._mouseWheelHandler)
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},
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deviceSupportUninstall() {
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off(document, 'keydown', this._keyDownHandler)
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off(document, mousewheelEventName, this._mouseWheelHandler)
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this._keyDownHandler = null
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this._mouseWheelHandler = null
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},
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handleImgLoad(e) {
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this.loading = false
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},
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handleImgError(e) {
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this.loading = false
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e.target.alt = '加载失败'
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},
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handleMouseDown(e) {
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if (this.loading || e.button !== 0) return
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const { offsetX, offsetY } = this.transform
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const startX = e.pageX
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const startY = e.pageY
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this._dragHandler = rafThrottle(ev => {
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this.transform.offsetX = offsetX + ev.pageX - startX
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this.transform.offsetY = offsetY + ev.pageY - startY
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})
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on(document, 'mousemove', this._dragHandler)
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on(document, 'mouseup', ev => {
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off(document, 'mousemove', this._dragHandler)
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})
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e.preventDefault()
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},
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reset() {
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this.transform = {
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scale: 1,
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deg: 0,
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offsetX: 0,
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offsetY: 0,
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enableTransition: false
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}
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},
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toggleMode() {
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if (this.loading) return
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this.reset()
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},
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prev() {
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if (this.isFirst && !this.infinite) return
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const len = this.urlList.length
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this.index = (this.index - 1 + len) % len
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},
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next() {
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if (this.isLast && !this.infinite) return
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const len = this.urlList.length
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this.index = (this.index + 1) % len
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},
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handleActions(action, options = {}) {
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if (this.loading) return
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const { zoomRate, rotateDeg, enableTransition } = {
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zoomRate: 0.2,
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rotateDeg: 90,
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enableTransition: true,
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...options
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}
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const { transform } = this
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switch (action) {
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case 'zoomOut':
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if (transform.scale > 0.2) {
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transform.scale = parseFloat((transform.scale - zoomRate).toFixed(3))
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}
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break
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case 'zoomIn':
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if (transform.scale < 5) {
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transform.scale = parseFloat((transform.scale + zoomRate).toFixed(3))
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}
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break
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case 'clocelise':
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transform.deg += rotateDeg
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break
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case 'anticlocelise':
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transform.deg -= rotateDeg
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break
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}
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transform.enableTransition = enableTransition
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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.image-viewer__wrapper{
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position: relative;
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top:0;
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right:0;
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bottom:0;
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left:0;
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width: 100%;
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height: 100%;
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}
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.image-viewer__btn{
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position:absolute;
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z-index:1;
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display:flex;
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align-items:center;
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justify-content:center;
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border-radius:50%;
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opacity:.8;
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cursor:pointer;
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box-sizing:border-box;
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user-select:none
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}
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.image-viewer__close{
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display: none;
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top:40px;
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right:40px;
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width:40px;
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height:40px;
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font-size:40px
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}
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.image-viewer_desc{
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position:absolute;
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top:40px;
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left:40px;
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font-size:15px;
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padding: 5px;
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height: 30px;
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width: 70px;
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line-height: 20px;
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text-align: center;
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color: #fff;
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background-color: #606266;
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border-color: #fff;
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z-index: 1;
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border-radius: 17px;
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// border-radius: 2%;
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}
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.image-viewer__canvas{
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position: absolute;
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top: 50%;
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transform: translateY(-50%);
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width:100%;
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height:100%;
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display:flex;
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justify-content:center;
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align-items:center
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}
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.image-viewer__actions{
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left:50%;
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bottom:30px;
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transform:translateX(-50%);
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width:282px;
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height:44px;
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padding:0 23px;
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background-color:#606266;
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border-color:#fff;
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border-radius:22px
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}
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.image-viewer__actions__inner{
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width:100%;
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height:100%;
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text-align:justify;
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cursor:default;
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font-size:23px;
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color:#fff;
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display:flex;
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align-items:center;
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justify-content:space-around
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}
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.image-viewer__next,.image-viewer__prev{
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top:50%;
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width:44px;
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height:44px;
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font-size:24px;
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color:#fff;
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background-color:#606266;
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border-color:#fff
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}
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.image-viewer__prev{
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transform:translateY(-50%);
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left:40px
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}
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.image-viewer__next{
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transform:translateY(-50%);
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right:40px;
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text-indent:2px
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}
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.image-viewer__mask{
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position:absolute;
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width:100%;
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height:100%;
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top:0;
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left:0;
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opacity:.5;
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// background:#000
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}
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.viewer-fade-enter-active{
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animation:viewer-fade-in .3s
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}
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.viewer-fade-leave-active{
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animation:viewer-fade-out .3s
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}
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@keyframes viewer-fade-in{
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0%{
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transform:translate3d(0,-20px,0);
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opacity:0
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}
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100%{
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transform:translate3d(0,0,0);
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opacity:1
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}
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}
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@keyframes viewer-fade-out{
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0%{
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transform:translate3d(0,0,0);
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opacity:1
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}
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100%{
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transform:translate3d(0,-20px,0);
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opacity:0
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}
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}
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</style>
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