对drag插件的优化
宇天
parent
a2d9603eaa
commit
64799069d3
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@ -3,7 +3,7 @@
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> 使用时,在目标元素上添加`:drag`属性即可以实现拖拽功能。
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## 依赖
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> 依赖`yua`框架
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> 依赖`Anot`框架
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## 浏览器兼容性
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+ chrome
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@ -18,38 +18,6 @@
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> 具体请看示例:
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> **注意:** `拖拽的元素不是本身时,只会往父级一级一级找相匹配的`
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<style>
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* {margin:0;padding:0}
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.box {width:100px;height:100px;background:#f30;}
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</style>
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</head>
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<body :controller="test">
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<div class="box" :drag></div>
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<script src="/js/yua.js"></script>
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<script>
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require(['lib/drag/main'], function(){
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yua({
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$id: 'test'
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})
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yua.scan()
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})
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</script>
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</body>
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</html>
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```
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```html
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<!DOCTYPE html>
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@ -63,23 +31,55 @@
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</head>
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<body :controller="test">
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<div class="box" :drag></div>
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<div class="box">
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<div class="handle" :drag="box"></div>
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</div>
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<script>
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require(['lib/drag/main'], function(){
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yua({
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import Anot from 'lib/drag/index.js'
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Anot({
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$id: 'test'
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})
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yua.scan()
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})
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</script>
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</body>
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</html>
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```
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## 额外参数
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### `data-limit`
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> 用于限制元素的拖动范围,默认没有限制。 可选值为 "window"和"parent", 分别为 "限制在可视区"和"限制在父级元素的范围"
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### `data-axis`
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> 用于限制拖动的方向, 默认值为 "xy",即不限制方向。可选值为 "x"和"y", 即只能在"x轴"或"y轴"方向拖动。
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### `data-beforedrag`
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> 拖动前的回调,如果有设置回调方法, 则该回调的返回值,可决定该元素是否能被拖拽, 可用于在特殊场景下,临时禁用拖拽。
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> `注:`
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> 1. 该回调方法,会传入3个参数, 第1个为被拖拽的元素(dom对象), 第2个参数为 该元素的x轴绝对坐标, 第3个元素为y轴绝对坐标;
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> 2. 该回调方法, 返回false时, 本次拖拽将临时失效, 返回其他值,或没有返回值,则忽略。
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### `data-dragging`
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> 元素被拖动时的回调。
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> `注:`
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> 1.该回调方法,会传入3个参数, 第1个为被拖拽的元素(dom对象), 第2个参数为 该元素的x轴绝对坐标, 第3个元素为y轴绝对坐标;
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### `data-dragged`
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> 元素被拖动结束后的回调。
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> `注:`
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> 1. 该回调方法,会传入3个参数, 第1个为被拖拽的元素(dom对象), 第2个参数为 该元素的x轴绝对坐标, 第3个元素为y轴绝对坐标;
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@ -23,8 +23,14 @@ Anot.directive('drag', {
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priority: 1500,
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init: function(binding) {
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binding.expr = '"' + binding.expr + '"'
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Anot(binding.element).css('cursor', 'move')
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let ico = document.documentMode ? 'move' : 'grab'
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if (window.sidebar) {
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ico = '-moz-' + ico
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} else if (window.chrome) {
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ico = '-webkit-' + ico
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}
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Anot(binding.element).css('cursor', ico)
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//取得拖动的3种状态回调
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//按下,且拖拽之前
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binding.beforedrag = getBindingCallback(
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@ -69,16 +75,19 @@ Anot.directive('drag', {
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delete binding.element.dataset.dragged
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},
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update: function(val) {
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var _this = this,
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target = val ? this.element.parentNode : this.element,
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$drag = Anot(this.element),
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$doc = Anot(document),
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$target = null,
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parentElem = null
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let _this = this
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let target = val ? this.element.parentNode : this.element
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let $drag = Anot(this.element)
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let $doc = Anot(document)
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let $target = null
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let parentElem = null
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// val值不为空时, 获取真正的拖动元素
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// 仅从父级上找
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while (val && target) {
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if (!target.classList) {
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Anot.error(`${this.name}=${this.expr}, 解析异常[元素不存在]`)
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}
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if (target.classList.contains(val) || target.id === val) {
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break
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} else {
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@ -91,11 +100,17 @@ Anot.directive('drag', {
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parentElem = target.parentNode
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}
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var dx, dy, mx, my, ox, oy, fox, foy, tw, th, ww, wh, bst, bsl
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let dx, dy, mx, my, ox, oy, fox, foy, tw, th, ww, wh, bst, bsl
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let cssTransition
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$drag.bind('mousedown', function(ev) {
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var gcs = getComputedStyle(target),
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cst = gcs.transform.replace(/matrix\((.*)\)/, '$1'),
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offset = $target.offset()
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let gcs = getComputedStyle(target)
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let cst = gcs.transform.replace(/matrix\((.*)\)/, '$1')
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let offset = $target.offset()
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if (gcs.transitionDuration !== '0s') {
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cssTransition = gcs.transitionDuration
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target.style.transitionDuration = '0s'
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}
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cst = cst !== 'none' ? cst.split(', ') : [1, 0, 0, 1, 0, 0]
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cst[4] -= 0
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@ -127,24 +142,29 @@ Anot.directive('drag', {
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//拖拽前回调
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if (_this.beforedrag) {
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var result = _this.beforedrag.call(_this.vmodels, target, ox, oy)
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let result = _this.beforedrag.call(
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_this.vmodels,
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target,
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ox + dx,
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oy + dy
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)
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if (result === false) {
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return
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}
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}
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//限制区域, 4个值依次是: 上, 下, 左, 右
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var limit = [0, wh - th, 0, ww - tw]
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let limit = [0, wh - th, 0, ww - tw]
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if (_this.limit === 'parent') {
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var pgcs = getComputedStyle(parentElem),
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pcst = pgcs.transform.replace(/matrix\((.*)\)/, '$1'),
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poffset = Anot(parentElem).offset()
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let pgcs = getComputedStyle(parentElem)
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let pcst = pgcs.transform.replace(/matrix\((.*)\)/, '$1')
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let poffset = Anot(parentElem).offset()
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pcst = pcst !== 'none' ? pcst.split(', ') : [1, 0, 0, 1, 0, 0]
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var pox = poffset.left - pcst[4] - bsl,
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poy = poffset.top - pcst[5] - bst
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let pox = poffset.left - pcst[4] - bsl
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let poy = poffset.top - pcst[5] - bst
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limit = [
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poy,
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@ -154,7 +174,10 @@ Anot.directive('drag', {
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]
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}
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var mvfn = $doc.bind('mousemove', function(ev) {
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let mvfn = $doc.bind('mousemove', function(ev) {
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// 防止拖动到边缘时导致页面滚动
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ev.preventDefault()
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//坐标轴限制
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if (_this.axis !== 'y') {
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cst[4] = ev.pageX - mx + dx
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@ -163,8 +186,8 @@ Anot.directive('drag', {
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cst[5] = ev.pageY - my + dy
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}
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;(fox = ox + cst[4]), //修正的offset
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(foy = oy + cst[5]) //修正的offset
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fox = ox + cst[4] //修正的offset
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foy = oy + cst[5] //修正的offset
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//如果不允许溢出可视区
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if (!_this.overflow) {
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@ -203,12 +226,12 @@ Anot.directive('drag', {
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if (_this.dragging) {
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_this.dragging.call(_this.vmodels, target, fox, foy)
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}
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// 防止拖动到边缘时导致页面滚动
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ev.preventDefault()
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}),
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upfn = $doc.bind('mouseup', function(ev) {
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})
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let upfn = $doc.bind('mouseup', function(ev) {
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$doc.unbind('mousemove', mvfn)
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$doc.unbind('mouseup', upfn)
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target.style.transitionDuration = cssTransition
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//结束回调
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if (_this.dragged) {
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_this.dragged.call(_this.vmodels, target, fox, foy)
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