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59 lines
2.0 KiB
JavaScript
59 lines
2.0 KiB
JavaScript
/* eslint-disable */
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/**
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*
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* @param e
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* @param arg_opts
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* @returns {boolean}
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*/
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export function effectRipple(e, arg_opts) {
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let opts = Object.assign({
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ele: e.target, // 波纹作用元素
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type: 'hit', // hit点击位置扩散 center中心点扩展
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bgc: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
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}, arg_opts),
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target = opts.ele;
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if (target) {
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let rect = target.getBoundingClientRect(),
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ripple = target.querySelector('.e-ripple');
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if (!ripple) {
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ripple = document.createElement('span');
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ripple.className = 'e-ripple';
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ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px';
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target.appendChild(ripple);
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} else {
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ripple.className = 'e-ripple';
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}
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switch (opts.type) {
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case 'center':
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ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px';
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ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px';
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break;
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default:
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ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop) + 'px';
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ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft) + 'px';
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}
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ripple.style.backgroundColor = opts.bgc;
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ripple.className = 'e-ripple z-active';
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return false;
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}
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}
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// database64文件格式转换为2进制
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/**
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*
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* @param data
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* @param mime
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* @returns {*}
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*/
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export function data2blob(data, mime) {
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// dataURL 的格式为 “data:image/png;base64,****”,逗号之前都是一些说明性的文字，我们只需要逗号之后的就行了
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data = data.split(',')[1];
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data = window.atob(data);
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var ia = new Uint8Array(data.length);
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for (var i = 0; i < data.length; i++) {
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ia[i] = data.charCodeAt(i);
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}
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// canvas.toDataURL 返回的默认格式就是 image/png
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return new Blob([ia], {type: mime});
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};
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