增加列表项的点击事件
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@@ -21,10 +21,14 @@ const props = defineProps({
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height: {
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type: [String, Number],
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default: '100%'
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},
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frozen: {
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type: Boolean,
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default: false
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}
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})
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const emit = defineEmits(['select'])
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const emit = defineEmits(['select', 'click', 'contextmenu'])
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// 计算列表项实际总高度
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const totalItemHeight = computed(() =>
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@@ -82,10 +86,18 @@ const phantomHeight = computed(() =>
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// 选择处理
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const handleSelect = (item) => {
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if (props.frozen) return // 如果列表被冻结,不响应选择
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selectedIndex.value = item.index
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emit('select', item)
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}
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// 点击处理
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const handleClick = (item) => {
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if (props.frozen) return // 如果列表被冻<E8A2AB><E586BB>,不响应点击
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handleSelect(item) // 点击时同时触发选中
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emit('click', item)
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}
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// 修改更新容器高度的方法
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function updateContainerHeight() {
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if (containerRef.value) {
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@@ -123,16 +135,24 @@ const handleScroll = debounce(() => {
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// 鼠标移入处理
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function handleMouseEnter(index) {
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if (props.frozen) return // 如果列表被冻结,不响应鼠标移入
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if (!isKeyboardNavigating.value) {
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selectedIndex.value = index
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// 移除滚动检查和处理,直接调用确保可见的方法
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emit('select', { ...props.data[index], index })
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ensureSelectedItemVisible()
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}
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}
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// 键盘事件处理
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function handleKeyDown(e) {
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if (e.key === 'ArrowUp' || e.key === 'ArrowDown') {
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if (props.frozen) return // 如果列表被冻结,不响应键盘事件
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if (e.key === 'Enter') {
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// 回车键触发点击事件
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if (selectedIndex.value >= 0 && selectedIndex.value < props.data.length) {
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const item = props.data[selectedIndex.value]
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emit('click', { ...item, index: selectedIndex.value })
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}
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} else if (e.key === 'ArrowUp' || e.key === 'ArrowDown') {
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e.preventDefault()
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isKeyboardNavigating.value = true
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@@ -144,6 +164,7 @@ function handleKeyDown(e) {
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if (e.key === 'ArrowUp') {
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const nextIndex = Math.max(0, selectedIndex.value - 1)
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selectedIndex.value = nextIndex
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emit('select', { ...props.data[nextIndex], index: nextIndex })
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// 使用与向下相同的逻辑,计算项目顶部位置
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const itemTop = nextIndex * totalItemHeight.value
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@@ -154,6 +175,7 @@ function handleKeyDown(e) {
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} else {
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const nextIndex = Math.min(props.data.length - 1, selectedIndex.value + 1)
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selectedIndex.value = nextIndex
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emit('select', { ...props.data[nextIndex], index: nextIndex })
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// 计算项目底部位置
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const itemBottom = (nextIndex + 1) * totalItemHeight.value
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@@ -191,6 +213,13 @@ function ensureSelectedItemVisible() {
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}
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}
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// 修改右键点击处理函数
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const handleContextMenu = (e, item) => {
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if (props.frozen) return // 如果列表被冻结,不响应右键点击
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e.preventDefault() // 阻止默认右键菜单
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emit('contextmenu', { item }) // 不需要传递事件对象
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}
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onMounted(() => {
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if (containerRef.value) {
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containerRef.value.addEventListener('scroll', handleScroll)
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@@ -233,6 +262,7 @@ onBeforeUnmount(() => {
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<div
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ref="containerRef"
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class="virtual-list-container"
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:class="{ 'list-frozen': frozen }"
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:style="{ height: '100%' }"
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tabindex="0"
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>
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@@ -252,7 +282,8 @@ onBeforeUnmount(() => {
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:class="{ 'selected': selectedIndex === item.index }"
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:style="{ height: `${config.itemHeight}px` }"
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@mouseenter="handleMouseEnter(item.index)"
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@click="handleSelect(item)"
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@click="handleClick(item)"
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@contextmenu="handleContextMenu($event, item)"
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>
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<slot name="item" :item="item">
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<!-- 默认列表项样式 -->
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@@ -300,7 +331,7 @@ onBeforeUnmount(() => {
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padding: 8px 16px;
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display: flex;
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align-items: center;
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transition: background-color 0.8s ease;
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transition: background-color 0.2s ease, opacity 0.2s ease;
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cursor: pointer;
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background-color: white;
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}
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@@ -348,4 +379,11 @@ onBeforeUnmount(() => {
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overflow: hidden;
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text-overflow: ellipsis;
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}
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/* 添加冻结状态的样式 */
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.list-frozen {
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pointer-events: none; /* 禁用鼠标事件 */
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opacity: 0.7; /* 降低透明度表示冻结状态 */
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user-select: none; /* 禁用文本选择 */
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}
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</style>
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