不知道为啥我上一篇的图片热区被移出首页，其实我主要是是为了自己看，其次才是分享，这段时间我又整理了一下热区，将里面的功能进一步完善了一下；
解决一下问题：
1.解决拖拽到规定区域外后松开鼠标再次进入后，坐标错误的问题
2.新增6个方向的拖拽放大缩小热区区域
3.新增放大了图片区域
4.做了相对于屏幕大小进行的百分比定位，解决因屏幕大小导致的定位错误问题
5.新增了新增热区功能，可手动点击按钮生成热区
6.解决了热区贴边不准确的问题
<!-- 上传组件 -->
<template>
<el-dialog v-model="dialog_visible" fullscreen @close="close_event">
<template #header>
<div class="title re">
<div class="tc size-16 fw">编辑热区</div>
</div>
</template>
<el-scrollbar class="content-scrollbar">
<div class="pa-40 flex-row gap-40">
<div class="left-content flex-1 pa-20">
<el-scrollbar class="img-scrollbar">
<div class="img-container">
<div class="re">
<div ref="imgBoxRef" class="oh" @mousedown.prevent="start_drag" @mousemove.prevent="move_drag" @mouseup.prevent="end_drag">
<div ref="imgRef">
<el-image :src="hot_list.img" class="w img block" @selectstart.prevent @contextmenu.prevent @dragstart.prevent></el-image>
</div>
<div ref="areaRef" class="area" :style="init_drag_style"></div>
<div v-for="(item, index) in hot_list.data" :key="index" class="area-box" :style="rect_style(item.drag_start, item.drag_end)" @mousedown.stop="start_drag_area_box(index, $event)" @dblclick="dbl_drag_event(item, index)">
<div class="del-btn" @click.stop="del_area_event(index)"><icon name="close"></icon></div>
<div class="drag-btn drag-tl" :data-index="index" @mousedown.stop="start_drag_btn_tl(index, $event)"></div>
<div class="drag-btn drag-tc" :data-index="index" @mousedown.stop="start_drag_btn_tc(index, $event)"></div>
<div class="drag-btn drag-lc" :data-index="index" @mousedown.stop="start_drag_btn_lc(index, $event)"></div>
<div class="drag-btn drag-bl" :data-index="index" @mousedown.stop="start_drag_btn_bl(index, $event)"></div>
<div class="drag-btn drag-bc" :data-index="index" @mousedown.stop="start_drag_btn_bc(index, $event)"></div>
<!-- 已完成 -->
<div class="drag-btn drag-br" :data-index="index" @mousedown.stop="start_drag_btn_br(index, $event)"></div>
<div class="drag-btn drag-rc" :data-index="index" @mousedown.stop="start_drag_btn_rc(index, $event)"></div>
<div class="text">
<div class="name">{{ item.name }}</div>
<div class="status" :class="!is_obj_empty(item.link) ? 'cr-primary' : 'cr-error'">{{ !is_obj_empty(item.link) ? (item.link?.name ?? '未设置') : '未设置' }}</div>
</div>
</div>
</div>
</div>
</div>
</el-scrollbar>
</div>
<div class="right-content flex-1 pa-20">
<div class="size-16 fw mb-10">图片热区</div>
<div class="flex-col gap-20 item">
<div v-for="(item, index) in hot_list.data" :key="index" class="flex-row align-c gap-10">
<el-input v-model="item.name" class="name" placeholder="名称"></el-input>
<url-value v-model="item.link"></url-value>
<icon name="del" size="20" @click="del_event(index)"></icon>
</div>
<el-button type="primary" class="add_hot" @click="add_event">添加选区</el-button>
<div class="size-12 cr-9">框选热区范围，双击设置热区信息</div>
</div>
</div>
</div>
</el-scrollbar>
<template #footer>
<span class="dialog-footer">
<el-button class="plr-28 ptb-10" type="primary" @click="confirm_event">完成</el-button>
</span>
</template>
</el-dialog>
<el-dialog v-model="hot_dialog_visible" width="560" append-to-body draggable @close="hot_close_event">
<template #header>
<div class="title re">
<div class="tc size-16 fw">设置热区</div>
</div>
</template>
<div class="content">
<el-form ref="formRef" :model="form" label-width="85px" class="pa-20 mt-16">
<el-form-item label="名称">
<el-input v-model="form.name" placeholder="请输入名称"></el-input>
</el-form-item>
<el-form-item label="热区跳转链接">
<url-value v-model="form.link"></url-value>
</el-form-item>
</el-form>
</div>
<template #footer>
<span class="dialog-footer">
<el-button class="plr-28 ptb-10" @click="hot_close_event">取消</el-button>
<el-button class="plr-28 ptb-10" type="primary" @click="hot_confirm_event">确定</el-button>
</span>
</template>
</el-dialog>
<el-button class="w" @click="open_hot_event"><icon name="add">编辑热区</icon></el-button>
</template>
<script lang="ts" setup>
import { cloneDeep } from 'lodash';
import { is_obj_empty } from '@/utils';
const app = getCurrentInstance();
/**
* @description: 热区
* @param modelValue{Object} 默认值
* @param dialog_visible {Boolean} 弹窗显示
* @return {*} update:modelValue
*/
const props = defineProps({});
const modelValue = defineModel({ type: Object as PropType<hotData>, default: {} });
const dialog_visible = defineModel('visibleDialog', { type: Boolean, default: false });
const hot_list = ref<hotData>({
img: '',
img_height: 1,
img_width: 1,
data: [],
});
const hot_list_index = ref(0);
//#region 左侧画布-----------------------------------------------start
const imgBoxRef = ref<HTMLElement | null>(null);
const imgRef = ref<HTMLElement | null>(null);
const rect_start = ref<rectCoords>({ x: 0, y: 0, width: 0, height: 0 });
const rect_end = ref<rectCoords>({ x: 0, y: 0, width: 0, height: 0 });
const areaRef = ref<HTMLElement | null>(null);
const init_drag_style = ref('');
// 拖拽生成盒子的开关
const drag_bool = ref(false);
// 拖拽盒子的开关
const drag_box_bool = ref(false);
// 拖拽放大缩小盒子的开关
const drag_box_scale_bool = ref(false);
const start_drag = (event: MouseEvent) => {
drag_bool.value = true;
if (!imgBoxRef.value) return;
rect_start.value.x = rect_start.value.x !== 0 ? rect_start.value.x : event.clientX - imgBoxRef.value.getBoundingClientRect().left;
rect_start.value.y = rect_start.value.y !== 0 ? rect_start.value.y : event.clientY - imgBoxRef.value.getBoundingClientRect().top;
rect_start.value.width = 0;
rect_start.value.height = 0;
};
const move_drag = (event: MouseEvent) => {
if (drag_bool.value) {
if (!imgBoxRef.value) return;
rect_end.value.x = event.clientX - imgBoxRef.value.getBoundingClientRect().left;
rect_end.value.y = event.clientY - imgBoxRef.value.getBoundingClientRect().top;
rect_end.value.width = rect_end.value.x - rect_start.value.x > 0 ? rect_end.value.x - rect_start.value.x : 0;
rect_end.value.height = rect_end.value.y - rect_start.value.y > 0 ? rect_end.value.y - rect_start.value.y : 0;
init_drag_style.value = `left: ${rect_start.value.x}px;top: ${rect_start.value.y}px;width: ${Math.max(rect_end.value.width, 1)}px;height: ${Math.max(rect_end.value.height, 1)}px;display: flex;`;
}
};
const end_drag = (event: MouseEvent) => {
drag_bool.value = false;
if (areaRef.value) areaRef.value.style.display = 'none';
if (!imgBoxRef.value) return;
init_drag_style.value = ``;
if (rect_end.value.width > 16 && rect_end.value.height > 16) {
hot_list.value.data.push({
name: '热区' + (hot_list.value.data.length + 1),
link: {},
drag_start: cloneDeep(rect_start.value),
drag_end: cloneDeep(rect_end.value),
});
}
rect_start.value = { x: 0, y: 0, width: 0, height: 0 };
rect_end.value = { x: 0, y: 0, width: 0, height: 0 };
};
const area_box_point = ref({ x: 0, y: 0 });
// area-box
const dbl_drag_event = (item: hotListData, index: number) => {
hot_dialog_visible.value = true;
form.value.link = item.link;
form.value.name = item.name;
hot_list_index.value = index;
};
const start_drag_area_box = (index: number, event: MouseEvent) => {
hot_list_index.value = index;
event.stopPropagation();
drag_box_bool.value = true;
let clone_drag_start = cloneDeep(hot_list.value.data[hot_list_index.value].drag_start);
let clone_drag_end = cloneDeep(hot_list.value.data[hot_list_index.value].drag_end);
// 记录原始位置
area_box_point.value = {
x: clone_drag_start.x - event.clientX,
y: clone_drag_start.y - event.clientY,
};
// 当子元素拖拽方法触发后父元素方法不触发
document.onmousemove = (areaBoxEvent) => {
// areaBoxEvent.stopPropagation();
if (drag_box_bool.value) {
if (!imgBoxRef.value) return;
const new_coordinate = {
x: areaBoxEvent.clientX + area_box_point.value.x,
y: areaBoxEvent.clientY + area_box_point.value.y,
};
// 左上边界判断
if (new_coordinate.x < 0) {
new_coordinate.x = 0;
}
if (new_coordinate.y < 0) {
new_coordinate.y = 0;
}
// 右下边界判断
if (new_coordinate.x + Math.max(clone_drag_end.width, 1) > imgBoxRef.value.getBoundingClientRect().width) {
new_coordinate.x = imgBoxRef.value.getBoundingClientRect().width - Math.max(clone_drag_end.width, 1);
}
if (new_coordinate.y + Math.max(clone_drag_end.height, 1) > imgBoxRef.value.getBoundingClientRect().height) {
new_coordinate.y = imgBoxRef.value.getBoundingClientRect().height - Math.max(clone_drag_end.height, 1);
}
hot_list.value.data[hot_list_index.value].drag_start.x = new_coordinate.x;
hot_list.value.data[hot_list_index.value].drag_start.y = new_coordinate.y;
hot_list.value.data[hot_list_index.value].drag_end.x = new_coordinate.x + Math.max(clone_drag_end.width, 1);
hot_list.value.data[hot_list_index.value].drag_end.y = new_coordinate.y + Math.max(clone_drag_end.height, 1);
}
};
document.onmouseup = (areaBoxEvent) => {
// areaBoxEvent.stopPropagation();
drag_box_bool.value = false;
};
};
// drag-btn
const start_drag_btn_br = (index: number, event: MouseEvent) => {
start_drag_btn(index, event, 'br');
};
const start_drag_btn_bl = (index: number, event: MouseEvent) => {
start_drag_btn(index, event, 'bl');
};
const start_drag_btn_bc = (index: number, event: MouseEvent) => {
start_drag_btn(index, event, 'bc');
};
const start_drag_btn_tl = (index: number, event: MouseEvent) => {
start_drag_btn(index, event, 'tl');
};
const start_drag_btn_tc = (index: number, event: MouseEvent) => {
start_drag_btn(index, event, 'tc');
};
const start_drag_btn_lc = (index: number, event: MouseEvent) => {
start_drag_btn(index, event, 'lc');
};
const start_drag_btn_rc = (index: number, event: MouseEvent) => {
start_drag_btn(index, event, 'rc');
};
// 画布拖拽公用方法
const start_drag_btn = (index: number, event: MouseEvent, type: string) => {
hot_list_index.value = index;
event.stopPropagation();
drag_box_scale_bool.value = true;
let clone_drag_start = hot_list.value.data[hot_list_index.value].drag_start;
let clone_drag_end = hot_list.value.data[hot_list_index.value].drag_end;
document.onmousemove = (dragBtnEvent) => {
// dragBtnEvent.stopPropagation();
//用鼠标的位置减去鼠标相对元素的位置，得到元素的位置
if (drag_box_scale_bool.value) {
if (!imgBoxRef.value) return;
switch (type) {
case 'br':
// 下右
clone_drag_end.x = handleBoundary(dragBtnEvent.clientX - imgBoxRef.value.getBoundingClientRect().left, 0, imgBoxRef.value.getBoundingClientRect().width);
clone_drag_end.y = handleBoundary(dragBtnEvent.clientY - imgBoxRef.value.getBoundingClientRect().top, 0, imgBoxRef.value.getBoundingClientRect().height);
hot_list.value.data[hot_list_index.value].drag_end = updateDragEnd(clone_drag_start, clone_drag_end, clone_drag_end);
break;
case 'bl':
// 下左
clone_drag_start.x = handleBoundary(dragBtnEvent.clientX - imgBoxRef.value.getBoundingClientRect().left, 0, clone_drag_end.x);
clone_drag_end.y = handleBoundary(dragBtnEvent.clientY - imgBoxRef.value.getBoundingClientRect().top, 0, imgBoxRef.value.getBoundingClientRect().height);
hot_list.value.data[hot_list_index.value].drag_start.x = clone_drag_start.x;
hot_list.value.data[hot_list_index.value].drag_end.y = clone_drag_end.y;
hot_list.value.data[hot_list_index.value].drag_end = updateDragEnd(clone_drag_start, clone_drag_end, { y: clone_drag_end.y });
break;
case 'bc':
// 下中
clone_drag_end.y = handleBoundary(dragBtnEvent.clientY - imgBoxRef.value.getBoundingClientRect().top, 0, imgBoxRef.value.getBoundingClientRect().height);
hot_list.value.data[hot_list_index.value].drag_end.y = clone_drag_end.y;
hot_list.value.data[hot_list_index.value].drag_end = updateDragEnd(clone_drag_start, clone_drag_end, { y: clone_drag_end.y });
break;
case 'tl':
// 上左
clone_drag_start.x = handleBoundary(dragBtnEvent.clientX - imgBoxRef.value.getBoundingClientRect().left, 0, clone_drag_end.x);
clone_drag_start.y = handleBoundary(dragBtnEvent.clientY - imgBoxRef.value.getBoundingClientRect().top, 0, clone_drag_end.y);
hot_list.value.data[hot_list_index.value].drag_start.x = clone_drag_start.x;
hot_list.value.data[hot_list_index.value].drag_start.y = clone_drag_start.y;
hot_list.value.data[hot_list_index.value].drag_end = updateDragEnd(clone_drag_start, clone_drag_end, {});
break;
case 'tc':
// 上中
clone_drag_start.y = handleBoundary(dragBtnEvent.clientY - imgBoxRef.value.getBoundingClientRect().top, 0, clone_drag_end.y);
hot_list.value.data[hot_list_index.value].drag_start.y = clone_drag_start.y;
hot_list.value.data[hot_list_index.value].drag_end = updateDragEnd(clone_drag_start, clone_drag_end, { y: clone_drag_end.y });
break;
case 'lc':
// 左中
clone_drag_start.x = handleBoundary(dragBtnEvent.clientX - imgBoxRef.value.getBoundingClientRect().left, 0, clone_drag_end.x);
hot_list.value.data[hot_list_index.value].drag_start.x = clone_drag_start.x;
hot_list.value.data[hot_list_index.value].drag_end = updateDragEnd(clone_drag_start, clone_drag_end, {});
break;
case 'rc':
// 右中
clone_drag_end.x = handleBoundary(dragBtnEvent.clientX - imgBoxRef.value.getBoundingClientRect().left, 0, imgBoxRef.value.getBoundingClientRect().width);
hot_list.value.data[hot_list_index.value].drag_end.x = clone_drag_end.x;
hot_list.value.data[hot_list_index.value].drag_end = updateDragEnd(clone_drag_start, clone_drag_end, { x: clone_drag_end.x });
break;
}
}
};
document.onmouseup = (dragBtnEvent2) => {
// dragBtnEvent2.stopPropagation();
drag_box_scale_bool.value = false;
};
};
// 辅助函数用于更新drag_end
const updateDragEnd = (dragStart: { x: number; y: number }, dragEnd: { x: number; y: number }, newDragEnd: { x?: number; y?: number }) => {
const newX = newDragEnd.x !== undefined ? newDragEnd.x : dragEnd.x;
const newY = newDragEnd.y !== undefined ? newDragEnd.y : dragEnd.y;
return {
x: newX,
y: newY,
width: newX - dragStart.x > 0 ? newX - dragStart.x : 0,
height: newY - dragStart.y > 0 ? newY - dragStart.y : 0,
};
};
// 辅助函数用于更新drag_start
const updateDragStart = (dragStart: { x: number; y: number }, newDragStart: { x?: number; y?: number }) => {
const newX = newDragStart.x !== undefined ? newDragStart.x : dragStart.x;
const newY = newDragStart.y !== undefined ? newDragStart.y : dragStart.y;
return { x: newX, y: newY };
};
// 辅助函数用于处理边界
const handleBoundary = (value: number, min: number, max: number) => Math.max(min, Math.min(value, max));
const del_area_event = (index: number) => {
hot_list.value.data.splice(index, 1);
};
const rect_style = computed(() => {
return (start: rectCoords, end: rectCoords) => {
return `left: ${start.x}px;top: ${start.y}px;width: ${Math.max(end.width, 1)}px;height: ${Math.max(end.height, 1)}px;display: flex;`;
};
});
//#endregion 左侧画布-----------------------------------------------end
//#region 右侧热区编辑-----------------------------------------------start
const del_event = (index: number) => {
hot_list.value.data.splice(index, 1);
};
const add_event = () => {
hot_list.value.data.push({
name: '热区' + (hot_list.value.data.length + 1),
link: {},
drag_start: {
x: 0,
y: 0,
width: 0,
height: 0,
},
drag_end: {
x: 100,
y: 100,
width: 100,
height: 100,
},
});
};
//#endregion 右侧热区编辑-----------------------------------------------end
//#region 设置热区弹窗-----------------------------------------------start
const hot_dialog_visible = ref(false);
interface formData {
link: linkData;
name: string;
}
const form = ref<formData>({
link: {
name: '',
},
name: '',
});
const hot_close_event = () => {
hot_dialog_visible.value = false;
};
const hot_confirm_event = () => {
hot_list.value.data[hot_list_index.value].name = form.value.name;
if (hot_list.value.data[hot_list_index.value].link) {
hot_list.value.data[hot_list_index.value].link = form.value.link;
}
hot_close_event();
};
//#endregion 设置热区弹窗-----------------------------------------------end
//#region 热区开启关闭确认取消回调 -----------------------------------------------start
// 打开热区弹窗
const open_hot_event = () => {
if (modelValue.value.img.length > 0) {
dialog_visible.value = true;
hot_list.value.img = modelValue.value.img;
setTimeout(() => {
// 创建临时变量储存传过来的数据
let temp_data = cloneDeep(modelValue.value);
// 获取最新的图片高度和宽度
temp_data.img_height = imgBoxRef.value?.clientHeight || 0;
temp_data.img_width = imgBoxRef.value?.clientWidth || 0;
// 根据原始数据的宽高和更新后的宽高的比例，计算出事实的坐标比例
const scale = temp_data.img_width / modelValue.value.img_width;
console.log(scale);
temp_data.data.forEach((item) => {
item.drag_start.x = item.drag_start.x * scale;
item.drag_start.y = item.drag_start.y * scale;
item.drag_end.x = item.drag_end.x * scale;
item.drag_end.y = item.drag_end.y * scale;
item.drag_end.width = item.drag_end.width * scale;
item.drag_end.height = item.drag_end.height * scale;
});
hot_list.value = temp_data;
}, 100);
} else {
ElMessage({
type: 'warning',
message: '请先选择图片',
});
}
};
// 取消回调
const close_event = () => {
dialog_visible.value = false;
};
// 确认回调
const confirm_event = () => {
if (hot_list.value.data.length > 0) {
// 筛选数组hot中所有的link是否有空值，如果有则提示出来
if (is_obj_empty(hot_list.value.data)) {
ElMessage({
type: 'warning',
message: '请先设置热区',
});
return;
}
const no_link_list = hot_list.value.data.filter((item) => {
return is_obj_empty(item.link);
});
if (no_link_list.length > 0) {
ElMessage.error('请设置热区链接!');
return;
} else {
modelValue.value = cloneDeep(hot_list.value);
close_event();
}
} else {
ElMessage.error('至少选择一个热区!');
}
};
//#endregion 热区开启关闭确认取消回调 -----------------------------------------------end
</script>
<style lang="scss" scoped>
@import 'index.scss';
</style>
标签：end,list,hot,value,js,start,drag,vue3,功能完善 From： https://www.cnblogs.com/sws-kevin/p/18367830