<script setup name="ScrollPane">
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import { ref, computed, onMounted, onBeforeUnmount, nextTick } from "vue";
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const $emit = defineEmits(["scroll"]);
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const tagAndTagSpacing = 0; // tagAndTagSpacing
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const left = ref(0);
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const scrollContainer = ref();
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const props = defineProps({
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tagRefs: {
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type: Array,
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default: () => [],
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},
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});
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const wrap = computed(() => {
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return scrollContainer.value.wrapRef;
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});
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function handleScroll(e) {
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const eventDelta = e.wheelDelta || -e.deltaY * 40;
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scrollContainer.value.scrollLeft = wrap.scrollLeft + eventDelta / 4;
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}
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function emitScroll() {
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$emit("scroll");
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}
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function moveToTarget(currentTag) {
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// const $container = $refs.scrollContainer.$el;
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const $container = scrollContainer.value.$el;
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const $containerWidth = $container.offsetWidth;
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// const $scrollWrapper = scrollWrapper;
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const $scrollWrapper = scrollContainer.value;
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// const tagList = $parent.$refs.tag;
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const tagList = props.tagRefs;
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let firstTag = null;
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let lastTag = null;
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// find first tag and last tag
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if (tagList.length > 0) {
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firstTag = tagList[0];
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lastTag = tagList[tagList.length - 1];
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}
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if (firstTag === currentTag) {
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$scrollWrapper.scrollLeft = 0;
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} else if (lastTag === currentTag) {
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$scrollWrapper.scrollLeft = $scrollWrapper.scrollWidth - $containerWidth;
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} else {
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// find preTag and nextTag
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const currentIndex = tagList.findIndex((item) => item === currentTag);
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const prevTag = tagList[currentIndex - 1];
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const nextTag = tagList[currentIndex + 1];
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// the tag's offsetLeft after of nextTag
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const afterNextTagOffsetLeft =
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nextTag.$el.offsetLeft + nextTag.$el.offsetWidth + tagAndTagSpacing;
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// the tag's offsetLeft before of prevTag
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const beforePrevTagOffsetLeft = prevTag.$el.offsetLeft - tagAndTagSpacing;
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if (afterNextTagOffsetLeft > $scrollWrapper.scrollLeft + $containerWidth) {
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$scrollWrapper.scrollLeft = afterNextTagOffsetLeft - $containerWidth;
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} else if (beforePrevTagOffsetLeft < $scrollWrapper.scrollLeft) {
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$scrollWrapper.scrollLeft = beforePrevTagOffsetLeft;
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}
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}
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}
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defineExpose({
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moveToTarget,
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});
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</script>
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<template>
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<el-scrollbar
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ref="scrollContainer"
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:vertical="false"
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class="scroll-container"
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>
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<!-- @wheel.prevent="handleScroll" -->
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<slot />
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</el-scrollbar>
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</template>
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<style lang="less" scoped>
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.scroll-container {
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white-space: nowrap;
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position: relative;
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overflow: hidden;
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width: 100%;
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:deep(.el-scrollbar__bar) {
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bottom: 0px;
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}
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:deep(.el-scrollbar__wrap) {
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overflow-x: hidden;
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}
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}
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.scroll-container::-webkit-scrollbar {
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height: 0;
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}
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.scroll-container::-webkit-scrollbar-thumb {
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/* 滚动条里面小方块 */
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border-radius: 10px;
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-webkit-box-shadow: none;
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background: none;
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}
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.scroll-container::-webkit-scrollbar-track {
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/* 滚动条里面轨道 */
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-webkit-box-shadow: none;
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border-radius: 10px;
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background: none;
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}
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</style>
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