forked from github/dataease
61 lines
1.5 KiB
JavaScript
61 lines
1.5 KiB
JavaScript
export function isFunction(func) {
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return (typeof func === 'function' || Object.prototype.toString.call(func) === '[object Function]')
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}
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// 对齐栅格
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export function snapToGrid(grid, pendingX, pendingY, scale = 1) {
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const x = Math.round((pendingX / scale) / grid[0]) * grid[0]
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const y = Math.round((pendingY / scale) / grid[1]) * grid[1]
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return [x, y]
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}
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// 获取rect模型
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export function getSize(el) {
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const rect = el.getBoundingClientRect()
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return [
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parseInt(rect.width),
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parseInt(rect.height)
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]
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}
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export function computeWidth(parentWidth, left, right) {
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return parentWidth - left - right
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}
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export function computeHeight(parentHeight, top, bottom) {
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return parentHeight - top - bottom
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}
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export function restrictToBounds(value, min, max) {
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if (min !== null && value < min) {
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return min
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}
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if (max !== null && max < value) {
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return max
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}
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return value
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}
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// 返回相对于参考点旋转后的坐标
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export function rotatedPoint(originX, originY, offsetX, offsetY, rotate) {
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const rad = (Math.PI / 180) * rotate
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const cos = Math.cos(rad)
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const sin = Math.sin(rad)
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const x = offsetX - originX
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const y = offsetY - originY
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return {
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x: x * cos - y * sin + originX,
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y: x * sin + y * cos + originY
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}
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}
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// 根据相对坐标返回角度，正方形为顺时针
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export function getAngle(x, y) {
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let theta = Math.atan2(y, x) // 正切转弧度
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theta = Math.round((180 / Math.PI) * theta) // 弧度转角度
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if (theta < 0) theta = 360 + theta // 控制角度在0~360度
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return theta // 返回角度
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}
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