picker.js源码
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了picker.js源码相关的知识，希望对你有一定的参考价值。
/**
* LArea移动端城市选择控件
*
* version:1.7.2
*
* author:黄磊
*
* git:https://github.com/xfhxbb/LArea
*
* Copyright 2016
*
* Licensed under MIT
*
* 最近修改于： 2016-6-12 16:47:41
*/
window.LArea = (function() {
var MobileArea = function() {
this.gearArea;
this.data;
this.index = 0;
this.value = [0, 0, 0];
}
MobileArea.prototype = {
init: function(params) {
this.params = params;
this.trigger = document.querySelector(params.trigger);
if(params.valueTo){
this.valueTo=document.querySelector(params.valueTo);
}
this.keys = params.keys;
this.type = params.type||1;
switch (this.type) {
case 1:
case 2:
break;
default:
throw new Error(‘错误提示: 没有这种数据源类型‘);
break;
}
this.bindEvent();
},
getData: function(callback) {
var _self = this;
if (typeof _self.params.data == "object") {
_self.data = _self.params.data;
callback();
} else {
var xhr = new XMLHttpRequest();
xhr.open(‘get‘, _self.params.data);
xhr.onload = function(e) {
if ((xhr.status >= 200 && xhr.status < 300) || xhr.status === 0) {
var responseData = JSON.parse(xhr.responseText);
_self.data = responseData.data;
if (callback) {
callback()
};
}
}
xhr.send();
}
},
bindEvent: function() {
var _self = this;
//呼出插件
function popupArea(e) {
_self.gearArea = document.createElement("div");
_self.gearArea.className = "gearArea";
_self.gearArea.innerhtml = ‘<div class="area_ctrl slideInUp">‘ +
‘<div class="area_btn_box">‘ +
‘<div class="area_btn larea_cancel">取消</div>‘ +
‘<div class="area_btn larea_finish">确定</div>‘ +
‘</div>‘ +
‘<div class="area_roll_mask">‘ +
‘<div class="area_roll">‘ +
‘<div>‘ +
‘<div class="gear area_province" data-areatype="area_province"></div>‘ +
‘<div class="area_grid">‘ +
‘</div>‘ +
‘</div>‘ +
‘<div>‘ +
‘<div class="gear area_city" data-areatype="area_city"></div>‘ +
‘<div class="area_grid">‘ +
‘</div>‘ +
‘</div>‘ +
‘<div>‘ +
‘<div class="gear area_county" data-areatype="area_county"></div>‘ +
‘<div class="area_grid">‘ +
‘</div>‘ +
‘</div>‘ +
‘</div>‘ +
‘</div>‘ +
‘</div>‘;
document.body.appendChild(_self.gearArea);
areaCtrlInit();
var larea_cancel = _self.gearArea.querySelector(".larea_cancel");
larea_cancel.addEventListener(‘touchstart‘, function(e) {
_self.close(e);
});
var larea_finish = _self.gearArea.querySelector(".larea_finish");
larea_finish.addEventListener(‘touchstart‘, function(e) {
_self.finish(e);
});
var area_province = _self.gearArea.querySelector(".area_province");
var area_city = _self.gearArea.querySelector(".area_city");
var area_county = _self.gearArea.querySelector(".area_county");
area_province.addEventListener(‘touchstart‘, gearTouchStart);
area_city.addEventListener(‘touchstart‘, gearTouchStart);
area_county.addEventListener(‘touchstart‘, gearTouchStart);
area_province.addEventListener(‘touchmove‘, gearTouchMove);
area_city.addEventListener(‘touchmove‘, gearTouchMove);
area_county.addEventListener(‘touchmove‘, gearTouchMove);
area_province.addEventListener(‘touchend‘, gearTouchEnd);
area_city.addEventListener(‘touchend‘, gearTouchEnd);
area_county.addEventListener(‘touchend‘, gearTouchEnd);
}
//初始化插件默认值
function areaCtrlInit() {
_self.gearArea.querySelector(".area_province").setAttribute("val", _self.value[0]);
_self.gearArea.querySelector(".area_city").setAttribute("val", _self.value[1]);
_self.gearArea.querySelector(".area_county").setAttribute("val", _self.value[2]);
switch (_self.type) {
case 1:
_self.setGearTooth(_self.data);
break;
case 2:
_self.setGearTooth(_self.data[0]);
break;
}
}
//触摸开始
function gearTouchStart(e) {
e.preventDefault();
var target = e.target;
while (true) {
if (!target.classList.contains("gear")) {
target = target.parentElement;
} else {
break
}
}
clearInterval(target["int_" + target.id]);
target["old_" + target.id] = e.targetTouches[0].screenY;
target["o_t_" + target.id] = (new Date()).getTime();
var top = target.getAttribute(‘top‘);
if (top) {
target["o_d_" + target.id] = parseFloat(top.replace(/em/g, ""));
} else {
target["o_d_" + target.id] = 0;
}
target.style.webkitTransitionDuration = target.style.transitionDuration = ‘0ms‘;
}
//手指移动
function gearTouchMove(e) {
e.preventDefault();
var target = e.target;
while (true) {
if (!target.classList.contains("gear")) {
target = target.parentElement;
} else {
break
}
}
target["new_" + target.id] = e.targetTouches[0].screenY;
target["n_t_" + target.id] = (new Date()).getTime();
var f = (target["new_" + target.id] - target["old_" + target.id]) * 30 / window.innerHeight;
target["pos_" + target.id] = target["o_d_" + target.id] + f;
target.style["-webkit-transform"] = ‘translate3d(0,‘ + target["pos_" + target.id] + ‘em,0)‘;
target.setAttribute(‘top‘, target["pos_" + target.id] + ‘em‘);
if(e.targetTouches[0].screenY<1){
gearTouchEnd(e);
};
}
//离开屏幕
function gearTouchEnd(e) {
e.preventDefault();
var target = e.target;
while (true) {
if (!target.classList.contains("gear")) {
target = target.parentElement;
} else {
break;
}
}
var flag = (target["new_" + target.id] - target["old_" + target.id]) / (target["n_t_" + target.id] - target["o_t_" + target.id]);
if (Math.abs(flag) <= 0.2) {
target["spd_" + target.id] = (flag < 0 ? -0.08 : 0.08);
} else {
if (Math.abs(flag) <= 0.5) {
target["spd_" + target.id] = (flag < 0 ? -0.16 : 0.16);
} else {
target["spd_" + target.id] = flag / 2;
}
}
if (!target["pos_" + target.id]) {
target["pos_" + target.id] = 0;
}
rollGear(target);
}
//缓动效果
function rollGear(target) {
var d = 0;
var stopGear = false;
function setDuration() {
target.style.webkitTransitionDuration = target.style.transitionDuration = ‘200ms‘;
stopGear = true;
}
clearInterval(target["int_" + target.id]);
target["int_" + target.id] = setInterval(function() {
var pos = target["pos_" + target.id];
var speed = target["spd_" + target.id] * Math.exp(-0.03 * d);
pos += speed;
if (Math.abs(speed) > 0.1) {} else {
var b = Math.round(pos / 2) * 2;
pos = b;
setDuration();
}
if (pos > 0) {
pos = 0;
setDuration();
}
var minTop = -(target.dataset.len - 1) * 2;
if (pos < minTop) {
pos = minTop;
setDuration();
}
if (stopGear) {
var gearVal = Math.abs(pos) / 2;
setGear(target, gearVal);
clearInterval(target["int_" + target.id]);
}
target["pos_" + target.id] = pos;
target.style["-webkit-transform"] = ‘translate3d(0,‘ + pos + ‘em,0)‘;
target.setAttribute(‘top‘, pos + ‘em‘);
d++;
}, 30);
}
//控制插件滚动后停留的值
function setGear(target, val) {
val = Math.round(val);
target.setAttribute("val", val);
switch (_self.type) {
case 1:
_self.setGearTooth(_self.data);
break;
case 2:
switch(target.dataset[‘areatype‘]){
case ‘area_province‘:
_self.setGearTooth(_self.data[0]);
break;
case ‘area_city‘:
var ref = target.childNodes[val].getAttribute(‘ref‘);
var childData=[];
var nextData= _self.data[2];
for (var i in nextData) {
if(i==ref){
childData = nextData[i];
break;
}
};
_self.index=2;
_self.setGearTooth(childData);
break;
}
}
}
_self.getData(function() {
_self.trigger.addEventListener(‘click‘, popupArea);
});
},
//重置节点个数
setGearTooth: function(data) {
var _self = this;
var item = data || [];
var l = item.length;
var gearChild = _self.gearArea.querySelectorAll(".gear");
var gearVal = gearChild[_self.index].getAttribute(‘val‘);
var maxVal = l - 1;
if (gearVal > maxVal) {
gearVal = maxVal;
}
gearChild[_self.index].setAttribute(‘data-len‘, l);
if (l > 0) {
var id = item[gearVal][this.keys[‘id‘]];
var childData;
switch (_self.type) {
case 1:
childData = item[gearVal].child
break;
case 2:
var nextData= _self.data[_self.index+1]
for (var i in nextData) {
if(i==id){
childData = nextData[i];
break;
}
};
break;
}
var itemStr = "";
for (var i = 0; i < l; i++) {
itemStr += "<div class=‘tooth‘ ref=‘" + item[i][this.keys[‘id‘]] + "‘>" + item[i][this.keys[‘name‘]] + "</div>";
}
gearChild[_self.index].innerHTML = itemStr;
gearChild[_self.index].style["-webkit-transform"] = ‘translate3d(0,‘ + (-gearVal * 2) + ‘em,0)‘;
gearChild[_self.index].setAttribute(‘top‘, -gearVal * 2 + ‘em‘);
gearChild[_self.index].setAttribute(‘val‘, gearVal);
_self.index++;
if (_self.index > 2) {
_self.index = 0;
return;
}
_self.setGearTooth(childData);
} else {
gearChild[_self.index].innerHTML = "<div class=‘tooth‘></div>";
gearChild[_self.index].setAttribute(‘val‘, 0);
if(_self.index==1){
gearChild[2].innerHTML = "<div class=‘tooth‘></div>";
gearChild[2].setAttribute(‘val‘, 0);
}
_self.index = 0;
}
},
finish: function(e) {
var _self = this;
var area_province = _self.gearArea.querySelector(".area_province");
var area_city = _self.gearArea.querySelector(".area_city");
var area_county = _self.gearArea.querySelector(".area_county");
var provinceVal = parseInt(area_province.getAttribute("val"));
var provinceText = area_province.childNodes[provinceVal].textContent;
var provinceCode = area_province.childNodes[provinceVal].getAttribute(‘ref‘);
var cityVal = parseInt(area_city.getAttribute("val"));
var cityText = area_city.childNodes[cityVal].textContent;
var cityCode = area_city.childNodes[cityVal].getAttribute(‘ref‘);
var countyVal = parseInt(area_county.getAttribute("val"));
var countyText = area_county.childNodes[countyVal].textContent;
var countyCode = area_county.childNodes[countyVal].getAttribute(‘ref‘);
_self.trigger.value = provinceText + ((cityText)?(‘,‘ + cityText):(‘‘))+ ((countyText)?(‘,‘ + countyText):(‘‘));
_self.value = [provinceVal, cityVal, countyVal];
if(this.valueTo){
this.valueTo.value= provinceCode +((cityCode)?(‘,‘ + cityCode):(‘‘)) + ((countyCode)?(‘,‘ + countyCode):(‘‘));
}
_self.close(e);
},
close: function(e) {
e.preventDefault();
var _self = this;
var evt = new CustomEvent(‘input‘);
_self.trigger.dispatchEvent(evt);
document.body.removeChild(_self.gearArea);
_self.gearArea=null;
}
}
return MobileArea;
})()
以上是关于picker.js源码的主要内容，如果未能解决你的问题，请参考以下文章
Android 逆向类加载器 ClassLoader ( 类加载器源码简介 | BaseDexClassLoader | DexClassLoader | PathClassLoader )(代码片段
初识Spring源码 -- doResolveDependency | findAutowireCandidates | @Order@Priority调用排序 | @Autowired注入(代码片段
初识Spring源码 -- doResolveDependency | findAutowireCandidates | @Order@Priority调用排序 | @Autowired注入(代码片段
Android 插件化VirtualApp 源码分析 ( 目前的 API 现状 | 安装应用源码分析 | 安装按钮执行的操作 | 返回到 HomeActivity 执行的操作 )(代码片段