import emitter from 'tiny-emitter/instance';
|
|
function loopFindParentDialog(el) {
|
if (!el) return null;
|
if (el.classList.contains('el-dialog')) {
|
return el;
|
}
|
return loopFindParentDialog(el.parentElement);
|
}
|
|
export default {
|
// eslint-disable-next-line @typescript-eslint/no-unused-vars
|
mounted(el, binding, vnode) {
|
const dialogEl = loopFindParentDialog(el);
|
const dialogHeaderEl = dialogEl.querySelector('.el-dialog__header');
|
// const dragDom = dialogEl.querySelector('.el-dialog');
|
const dragDom = dialogEl;
|
dialogHeaderEl.style.cssText += ';cursor:move;';
|
dragDom.style.cssText += ';top:0px;';
|
|
// 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
|
const getStyle = (function() {
|
if (window.document.currentStyle) {
|
return (dom, attr) => dom.currentStyle[attr];
|
} else {
|
return (dom, attr) => getComputedStyle(dom, false)[attr];
|
}
|
})();
|
|
dialogHeaderEl.onmousedown = (e) => {
|
// 鼠标按下，计算当前元素距离可视区的距离
|
const disX = e.clientX - dialogHeaderEl.offsetLeft;
|
const disY = e.clientY - dialogHeaderEl.offsetTop;
|
|
const dragDomWidth = dragDom.offsetWidth;
|
const dragDomHeight = dragDom.offsetHeight;
|
|
const screenWidth = document.body.clientWidth;
|
const screenHeight = document.body.clientHeight;
|
|
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
|
let styL = getStyle(dragDom, 'left');
|
let styT = getStyle(dragDom, 'top');
|
|
if (styL.includes('%')) {
|
styL = +document.body.clientWidth * (+styL.replace(/\%/g, '') / 100);
|
styT = +document.body.clientHeight * (+styT.replace(/\%/g, '') / 100);
|
} else {
|
styL = +styL.replace(/\px/g, '');
|
styT = +styT.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;`;
|
|
// emit onDrag event
|
emitter.emit('elDialogDragDialog');
|
};
|
|
document.onmouseup = function() {
|
document.onmousemove = null;
|
document.onmouseup = null;
|
};
|
};
|
}
|
};
|
