purchase-let/uni_modules/uview-plus/components/u-swipe-action-item/alipay.sjs

230 lines
8.0 KiB
JavaScript
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/**
* 此为wxs模块只支持APP-VUE微信和QQ小程序以及H5平台
* wxs内部不支持es6语法变量只能使用var定义无法使用解构箭头函数等特性
*/
// 开始触摸
function touchstart(event, ownerInstance) {
// 触发事件的组件的ComponentDescriptor实例
var instance = event.instance
// wxs内的局部变量快照此快照是属于整个组件的在touchstart和touchmove事件中都能获取到相同的结果
var state = instance.getState()
if (state.disabled) return
var touches = event.touches
// 如果进行的是多指触控,不允许进行操作
if (touches && touches.length > 1) return
// 标识当前为滑动中状态
state.moving = true
// 记录触摸开始点的坐标值
state.startX = touches[0].pageX
state.startY = touches[0].pageY
ownerInstance.callMethod('closeOther')
}
// 触摸滑动
function touchmove(event, ownerInstance) {
// 触发事件的组件的ComponentDescriptor实例
var instance = event.instance
// wxs内的局部变量快照
var state = instance.getState()
if (state.disabled || !state.moving) return
var touches = event.touches
var pageX = touches[0].pageX
var pageY = touches[0].pageY
var moveX = pageX - state.startX
var moveY = pageY - state.startY
var buttonsWidth = state.buttonsWidth
// 移动的X轴距离大于Y轴距离也即终点与起点位置连线与X轴夹角小于45度时禁止页面滚动
if (Math.abs(moveX) > Math.abs(moveY) || Math.abs(moveX) > state.threshold) {
event.preventDefault && event.preventDefault()
event.stopPropagation && event.stopPropagation()
}
// 如果移动的X轴距离小于Y轴距离也即终点位置与起点位置连线与Y轴夹角小于45度时认为是页面上下滑动而不是左右滑动单元格
if (Math.abs(moveX) < Math.abs(moveY)) return
// 限制右滑的距离不允许内容部分往右偏移右滑会导致X轴偏移值大于0以此做判断
// 此处不能直接return因为滑动过程中会缺失某些关键点坐标会导致错乱最好的办法就是
// 在超出后设置为0
if (state.status === 'open') {
// 在开启状态下,向左滑动,需忽略
if (moveX < 0) moveX = 0
// 想要收起菜单,最大能移动的距离为按钮的总宽度
if (moveX > buttonsWidth) moveX = buttonsWidth
// 如果是已经打开了的状态,向左滑动时,移动收起菜单
moveSwipeAction(-buttonsWidth + moveX, instance, ownerInstance)
} else {
// 关闭状态下,右滑动需忽略
if (moveX > 0) moveX = 0
// 滑动的距离不允许超过所有按钮的总宽度,此时只能是左滑,最终设置按钮的总宽度,同时为负数
if (Math.abs(moveX) > buttonsWidth) moveX = -buttonsWidth
// 只要是在滑过程中,就不断移动单元格内容部分,从而使隐藏的菜单显示出来
moveSwipeAction(moveX, instance, ownerInstance)
}
}
// 触摸结束
function touchend(event, ownerInstance) {
// 触发事件的组件的ComponentDescriptor实例
var instance = event.instance
// wxs内的局部变量快照
var state = instance.getState()
if (!state.moving || state.disabled) return
var touches = event.changedTouches ? event.changedTouches[0] : {}
var pageX = touches.pageX
var pageY = touches.pageY
var moveX = pageX - state.startX
if (state.status === 'open') {
// 在展开的状态下,继续左滑,无需操作
if (moveX < 0) return
// 在开启状态下点击一下内容区域moveX为0也即没有进行移动这时执行收起菜单逻辑
if (moveX === 0) {
return closeSwipeAction(instance, ownerInstance)
}
// 在开启状态下,滑动距离小于阈值,则默认为不关闭,同时恢复原来的打开状态
if (Math.abs(moveX) < state.threshold) {
openSwipeAction(instance, ownerInstance)
} else {
// 如果滑动距离大于阈值,则执行收起逻辑
closeSwipeAction(instance, ownerInstance)
}
} else {
// 在关闭的状态下,右滑,无需操作
if (moveX > 0) return
// 理由同上
if (Math.abs(moveX) < state.threshold) {
closeSwipeAction(instance, ownerInstance)
} else {
openSwipeAction(instance, ownerInstance)
}
}
}
// 获取过渡时间
function getDuration(value) {
if (value.toString().indexOf('s') >= 0) return value
return value > 30 ? value + 'ms' : value + 's'
}
// 滑动结束时判断滑动的方向
function getMoveDirection(instance, ownerInstance) {
var state = instance.getState()
}
// 移动滑动选择器内容区域,同时显示出其隐藏的菜单
function moveSwipeAction(moveX, instance, ownerInstance) {
var state = instance.getState()
// 获取所有按钮的实例,需要通过它去设置按钮的位移
var buttons = ownerInstance.selectAllComponents('.u-swipe-action-item__right__button')
// 设置菜单内容部分的偏移
instance.requestAnimationFrame(function() {
instance.setStyle({
// 设置translateX的值
'transition': 'none',
transform: 'translateX(' + moveX + 'px)',
'-webkit-transform': 'translateX(' + moveX + 'px)'
})
})
}
// 一次性展开滑动菜单
function openSwipeAction(instance, ownerInstance) {
var state = instance.getState()
// 获取所有按钮的实例,需要通过它去设置按钮的位移
var buttons = ownerInstance.selectAllComponents('.u-swipe-action-item__right__button')
// 处理duration单位问题
var duration = getDuration(state.duration)
// 展开过程中是向左移动所以X的偏移应该为负值
var buttonsWidth = -state.buttonsWidth
instance.requestAnimationFrame(function() {
// 设置菜单主体内容
instance.setStyle({
'transition': 'transform ' + duration,
'transform': 'translateX(' + buttonsWidth + 'px)',
'-webkit-transform': 'translateX(' + buttonsWidth + 'px)',
})
})
setStatus('open', instance, ownerInstance)
}
// 标记菜单的当前状态open-已经打开close-已经关闭
function setStatus(status, instance, ownerInstance) {
var state = instance.getState()
state.status = status
ownerInstance.callMethod('setState', status)
}
// 一次性收起滑动菜单
function closeSwipeAction(instance, ownerInstance) {
var state = instance.getState()
// 获取所有按钮的实例,需要通过它去设置按钮的位移
var buttons = ownerInstance.selectAllComponents('.u-swipe-action-item__right__button')
var len = buttons.length
// 处理duration单位问题
var duration = getDuration(state.duration)
instance.requestAnimationFrame(function() {
// 设置菜单主体内容
instance.setStyle({
'transition': 'transform ' + duration,
'transform': 'translateX(0px)',
'-webkit-transform': 'translateX(0px)'
})
// 设置各个隐藏的按钮为收起的状态
for (var i = len - 1; i >= 0; i--) {
buttons[i].setStyle({
'transition': 'transform ' + duration,
'transform': 'translateX(0px)',
'-webkit-transform': 'translateX(0px)'
})
}
})
setStatus('close', instance, ownerInstance)
}
// status的状态发生变化
function statusChange(newValue, oldValue, ownerInstance, instance) {
var state = instance.getState()
if (state.disabled) return
// 打开或关闭单元格
if (newValue === 'close' && state.status === 'open') {
closeSwipeAction(instance, ownerInstance)
} else if(newValue === 'open' && state.status === 'close') {
openSwipeAction(instance, ownerInstance)
}
}
// 菜单尺寸发生变化
function sizeChange(newValue, oldValue, ownerInstance, instance) {
// wxs内的局部变量快照
var state = instance.getState()
// 临时防止nv_disabled报错
if (!state || !newValue) {
return;
}
state.disabled = newValue.disabled
state.duration = newValue.duration
state.show = newValue.show
state.threshold = newValue.threshold
state.buttons = newValue.buttons
if (state.buttons) {
var len = state.buttons.length
var buttonsWidth = 0
var buttons = newValue.buttons
for (var i = 0; i < len; i++) {
buttonsWidth += buttons[i].width
}
}
state.buttonsWidth = buttonsWidth
}
export default {
touchstart: touchstart,
touchmove: touchmove,
touchend: touchend,
sizeChange: sizeChange,
statusChange: statusChange
}