useModalDrag.ts
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import { Ref, unref, watchEffect } from 'vue';
import { useTimeoutFn } from '/@/hooks/core/useTimeout';
export interface UseModalDragMoveContext {
draggable: Ref<boolean>;
destroyOnClose: Ref<boolean | undefined> | undefined;
visible: Ref<boolean>;
}
export function useModalDragMove(context: UseModalDragMoveContext) {
const getStyle = (dom: any, attr: any) => {
return getComputedStyle(dom)[attr];
};
const drag = (wrap: any) => {
if (!wrap) return;
wrap.setAttribute('data-drag', unref(context.draggable));
const dialogHeaderEl = wrap.querySelector('.ant-modal-header');
const dragDom = wrap.querySelector('.ant-modal');
if (!dialogHeaderEl || !dragDom || !unref(context.draggable)) return;
dialogHeaderEl.style.cursor = 'move';
dialogHeaderEl.onmousedown = (e: any) => {
if (!e) return;
// 鼠标按下，计算当前元素距离可视区的距离
const disX = e.clientX;
const disY = e.clientY;
const screenWidth = document.body.clientWidth; // body当前宽度
const screenHeight = document.documentElement.clientHeight; // 可见区域高度(应为body高度，可某些环境下无法获取)
const dragDomWidth = dragDom.offsetWidth; // 对话框宽度
const dragDomheight = dragDom.offsetHeight; // 对话框高度
const minDragDomLeft = dragDom.offsetLeft;
const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;
const minDragDomTop = dragDom.offsetTop;
const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;
// 获取到的值带px 正则匹配替换
const domLeft = getStyle(dragDom, 'left');
const domTop = getStyle(dragDom, 'top');
let styL = +domLeft;
let styT = +domTop;
// 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
if (domLeft.includes('%')) {
styL = +document.body.clientWidth * (+domLeft.replace(/%/g, '') / 100);
styT = +document.body.clientHeight * (+domTop.replace(/%/g, '') / 100);
} else {
styL = +domLeft.replace(/px/g, '');
styT = +domTop.replace(/px/g, '');
}
document.onmousemove = function (e) {
// 通过事件委托，计算移动的距离
let left = e.clientX - disX;
let top = e.clientY - disY;
// 边界处理
if (-left > minDragDomLeft) {
left = -minDragDomLeft;
} else if (left > maxDragDomLeft) {
left = maxDragDomLeft;
}
if (-top > minDragDomTop) {
top = -minDragDomTop;
} else if (top > maxDragDomTop) {
top = maxDragDomTop;
}
// 移动当前元素
dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`;
};
document.onmouseup = () => {
document.onmousemove = null;
document.onmouseup = null;
};
};
};
const handleDrag = () => {
const dragWraps = document.querySelectorAll('.ant-modal-wrap');
for (const wrap of Array.from(dragWraps)) {
if (!wrap) continue;
const display = getStyle(wrap, 'display');
const draggable = wrap.getAttribute('data-drag');
if (display !== 'none') {
// 拖拽位置
if (draggable === null || unref(context.destroyOnClose)) {
drag(wrap);
}
}
}
};
watchEffect(() => {
if (!unref(context.visible) || !unref(context.draggable)) {
return;
}
useTimeoutFn(() => {
handleDrag();
}, 30);
});
}