| /** | |
|  * 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('.uv-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('.uv-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('.uv-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() | |
| 	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 | |
| } | |
| 
 | |
| module.exports = { | |
| 	touchstart: touchstart, | |
| 	touchmove: touchmove, | |
| 	touchend: touchend, | |
| 	sizeChange: sizeChange, | |
| 	statusChange: statusChange | |
| }
 |