Function showTip

js/input.plugin.js:124–139

()

			var tooltip = this.sliderAction;
			var timer = null;
			var showTip = function() { //每次重新计算是因为控件可能被隐藏，初始化时计算是不正确的
				tooltip.classList.remove(CLASS_HIDDEN);
				var offsetLeft = element.offsetLeft;
				var width = element.offsetWidth - 28;
				var tooltipWidth = tooltip.offsetWidth;
				var distince = Math.abs(element.max - element.min);
				var scaleWidth = (width / distince) * Math.abs(element.value - element.min);
				tooltip.style.left = (14 + offsetLeft + scaleWidth - tooltipWidth / 2) + 'px';
				tooltip.innerText = element.value;
				if (timer) {
					clearTimeout(timer);
				}
				timer = setTimeout(function() {
					tooltip.classList.add(CLASS_HIDDEN);
				}, 1000);
			};
			element.addEventListener('input', showTip);
			element.addEventListener('tap', showTip);
			element.addEventListener($.EVENT_MOVE, function(e) {