百度API實現地圖示點並測距
##index.html
<!doctype html>
<html>
<head>
<title>地圖示點</title>
<meta http-equiv="content-type" content="text/html;charset=utf-8;"/>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
</head>
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</script>
<style>
.m-tit{font-size: 22px;color: #333333;}
.w110 {width: 110px;}
.l-btn {
line-height: 36px;
cursor: pointer;
border-radius: 4px;
color: #ffffff;
font-family: microsoft yahei;
font-size: 12px;
width: 91px;
height: 36px;
border: none;
background: #3cc;
}
.one-level{margin-bottom: 20px;border-bottom:1px solid #ddd;height: 68px;line-height: 68px;}
.mapc-input{ position: absolute; top: 200px; right: 100px; width: 260px; height:auto; border: 1px solid #ccc; padding:5px; background-color: #fff;}
.mapc-input input[type=text]{ display: block; margin-left: 20px; width: 148px; height: 26px; border: 1px solid #ccc;float: left;}
.mapc-btn{ display: block; margin-left:15px; width: 58px; height: 30px; line-height: 30px; font-size: 13px; text-align: center; float:left;cursor:pointer;}
</style>
<body>
<div class="one-level">
<span class="m-tit">地圖示點</span>
</div>
<table width="94%" height="40" border="0" align="center" cellpadding="0" cellspacing="0" style="margin-top:20px;">
<tr style="border-bottom:2px solid #990000;">
<div style="width:94%;margin-left:3%;">
<button class="l-btn w110 fr" style="float:right;margin-right:20px;" onclick="startPunc(this)">開始標點</button>
<button class="l-btn w110 fr" style="float:right;margin-right:20px;display: none;" onclick="savePoints(this)">確認提交</button>
</div>
</tr>
</table>
<div style="width: 94%;margin:10px auto;padding:2px;border:1px solid #ccc;" id="map">
<div id="map_canvas" style="width: 100%; height: 400px"></div>
<div class="mapc-input" style="z-index:100000;">
<input type="text" id="keyword" value="">
<button class="mapc-btn" onclick="searchLocation();">定位</button>
</div>
</div>
<table id="Legend" width="150" border="0" cellspacing="0" cellpadding="4" style="position: absolute; z-index: 1; border: 1px solid rgb(102, 102, 102); background-color: rgb(255, 255, 255); top: 534px; left: 747.5px;">
<tr>
<td align="center">圖例: <font color="#FF0033" face="Arial black">◆</font>標點位置 </td>
</tr>
</table>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=3.0&ak=OGTxxxxxxx9mek"></script>
<script type="text/javascript" src="./js/Baidu_DistanceTool_1.2.js"></script>
<script type="text/javascript" src="./js/index.js"></script>
</body>
</html>
##Baidu_DistanceTool_1.2.js
/**
* @fileoverview 百度地圖的測距工具類，對外開放。
* 允許使用者在地圖上點選完成距離的測量。
* 使用者可以自定義測距線段的相關樣式，例如線寬、顏色、測距結果所用的單位制等等。
* 主入口類是<a href="symbols/BMapLib.DistanceTool.html">DistanceTool</a>，
* 基於Baidu Map API 1.2。
*
* @author Baidu Map Api Group
* @version 1.2
*/
/**
* @namespace BMap的所有library類均放在BMapLib名稱空間下
*/
var BMapLib = window.BMapLib = BMapLib || {};
(function() {
/**
* 宣告baidu包
*/
var baidu = baidu || {guid : "$BAIDU$"};
(function() {
// 一些頁面級別唯一的屬性，需要掛載在window[baidu.guid]上
window[baidu.guid] = {};
/**
* 將源物件的所有屬性拷貝到目標物件中
* @name baidu.extend
* @function
* @grammar baidu.extend(target, source)
* @param {Object} target 目標物件
* @param {Object} source 源物件
* @returns {Object} 目標物件
*/
baidu.extend = function (target, source) {
for (var p in source) {
if (source.hasOwnProperty(p)) {
target[p] = source[p];
}
}
return target;
};
/**
* @ignore
* @namespace
* @baidu.lang 對語言層面的封裝，包括型別判斷、模組擴充套件、繼承基類以及物件自定義事件的支援。
* @property guid 物件的唯一標識
*/
baidu.lang = baidu.lang || {};
/**
* 返回一個當前頁面的唯一標識字串。
* @function
* @grammar baidu.lang.guid()
* @returns {String} 當前頁面的唯一標識字串
*/
baidu.lang.guid = function() {
return "TANGRAM__" + (window[baidu.guid]._counter ++).toString(36);
};
window[baidu.guid]._counter = window[baidu.guid]._counter || 1;
/**
* 所有類的例項的容器
* key為每個例項的guid
*/
window[baidu.guid]._instances = window[baidu.guid]._instances || {};
/**
* Tangram繼承機制提供的一個基類，使用者可以通過繼承baidu.lang.Class來獲取它的屬性及方法。
* @function
* @name baidu.lang.Class
* @grammar baidu.lang.Class(guid)
* @param {string} guid 物件的唯一標識
* @meta standard
* @remark baidu.lang.Class和它的子類的例項均包含一個全域性唯一的標識guid。
* guid是在建構函式中生成的，因此，繼承自baidu.lang.Class的類應該直接或者間接呼叫它的建構函式。<br>
* baidu.lang.Class的建構函式中產生guid的方式可以保證guid的唯一性，及每個例項都有一個全域性唯一的guid。
*/
baidu.lang.Class = function(guid) {
this.guid = guid || baidu.lang.guid();
window[baidu.guid]._instances[this.guid] = this;
};
window[baidu.guid]._instances = window[baidu.guid]._instances || {};
/**
* 判斷目標引數是否string型別或String物件
* @name baidu.lang.isString
* @function
* @grammar baidu.lang.isString(source)
* @param {Any} source 目標引數
* @shortcut isString
* @meta standard
*
* @returns {boolean} 型別判斷結果
*/
baidu.lang.isString = function (source) {
return '[object String]' == Object.prototype.toString.call(source);
};
/**
* 判斷目標引數是否為function或Function例項
* @name baidu.lang.isFunction
* @function
* @grammar baidu.lang.isFunction(source)
* @param {Any} source 目標引數
* @returns {boolean} 型別判斷結果
*/
baidu.lang.isFunction = function (source) {
return '[object Function]' == Object.prototype.toString.call(source);
};
/**
* 過載了預設的toString方法，使得返回資訊更加準確一些。
* @return {string} 物件的String表示形式
*/
baidu.lang.Class.prototype.toString = function(){
return "[object " + (this._className || "Object" ) + "]";
};
/**
* 釋放物件所持有的資源，主要是自定義事件。
* @name dispose
* @grammar obj.dispose()
*/
baidu.lang.Class.prototype.dispose = function(){
delete window[baidu.guid]._instances[this.guid];
for(var property in this){
if (!baidu.lang.isFunction(this[property])) {
delete this[property];
}
}
this.disposed = true;
};
/**
* 自定義的事件物件。
* @function
* @name baidu.lang.Event
* @grammar baidu.lang.Event(type[, target])
* @param {string} type 事件型別名稱。為了方便區分事件和一個普通的方法，事件型別名稱必須以"on"(小寫)開頭。
* @param {Object} [target]觸發事件的物件
* @meta standard
* @remark 引入該模組，會自動為Class引入3個事件擴充套件方法：addEventListener、removeEventListener和dispatchEvent。
* @see baidu.lang.Class
*/
baidu.lang.Event = function (type, target) {
this.type = type;
this.returnValue = true;
this.target = target || null;
this.currentTarget = null;
};
/**
* 註冊物件的事件監聽器。引入baidu.lang.Event後，Class的子類例項才會獲得該方法。
* @grammar obj.addEventListener(type, handler[, key])
* @param {string} type 自定義事件的名稱
* @param {Function} handler 自定義事件被觸發時應該呼叫的回撥函式
* @param {string} [key] 為事件監聽函式指定的名稱，可在移除時使用。如果不提供，方法會預設為它生成一個全域性唯一的key。
* @remark 事件型別區分大小寫。如果自定義事件名稱不是以小寫"on"開頭，該方法會給它加上"on"再進行判斷，即"click"和"onclick"會被認為是同一種事件。
*/
baidu.lang.Class.prototype.addEventListener = function (type, handler, key) {
if (!baidu.lang.isFunction(handler)) {
return;
}
!this.__listeners && (this.__listeners = {});
var t = this.__listeners, id;
if (typeof key == "string" && key) {
if (/[^\w\-]/.test(key)) {
throw("nonstandard key:" + key);
} else {
handler.hashCode = key;
id = key;
}
}
type.indexOf("on") != 0 && (type = "on" + type);
typeof t[type] != "object" && (t[type] = {});
id = id || baidu.lang.guid();
handler.hashCode = id;
t[type][id] = handler;
};
/**
* 移除物件的事件監聽器。引入baidu.lang.Event後，Class的子類例項才會獲得該方法。
* @grammar obj.removeEventListener(type, handler)
* @param {string} type 事件型別
* @param {Function|string} handler 要移除的事件監聽函式或者監聽函式的key
* @remark 如果第二個引數handler沒有被繫結到對應的自定義事件中，什麼也不做。
*/
baidu.lang.Class.prototype.removeEventListener = function (type, handler) {
if (baidu.lang.isFunction(handler)) {
handler = handler.hashCode;
} else if (!baidu.lang.isString(handler)) {
return;
}
!this.__listeners && (this.__listeners = {});
type.indexOf("on") != 0 && (type = "on" + type);
var t = this.__listeners;
if (!t[type]) {
return;
}
t[type][handler] && delete t[type][handler];
};
/**
* 派發自定義事件，使得繫結到自定義事件上面的函式都會被執行。引入baidu.lang.Event後，Class的子類例項才會獲得該方法。
* @grammar obj.dispatchEvent(event, options)
* @param {baidu.lang.Event|String} event Event物件，或事件名稱(1.1.1起支援)
* @param {Object} options 擴充套件引數,所含屬性鍵值會擴充套件到Event物件上(1.2起支援)
* @remark 處理會呼叫通過addEventListenr繫結的自定義事件回撥函式之外，還會呼叫直接繫結到物件上面的自定義事件。
* 例如：<br>
* myobj.onMyEvent = function(){}<br>
* myobj.addEventListener("onMyEvent", function(){});
*/
baidu.lang.Class.prototype.dispatchEvent = function (event, options) {
if (baidu.lang.isString(event)) {
event = new baidu.lang.Event(event);
}
!this.__listeners && (this.__listeners = {});
options = options || {};
for (var i in options) {
event[i] = options[i];
}
var i, t = this.__listeners, p = event.type;
event.target = event.target || this;
event.currentTarget = this;
p.indexOf("on") != 0 && (p = "on" + p);
baidu.lang.isFunction(this[p]) && this[p].apply(this, arguments);
if (typeof t[p] == "object") {
for (i in t[p]) {
t[p][i].apply(this, arguments);
}
}
return event.returnValue;
};
/**
* 為型別構造器建立繼承關係
* @name baidu.lang.inherits
* @function
* @grammar baidu.lang.inherits(subClass, superClass[, className])
* @param {Function} subClass 子類構造器
* @param {Function} superClass 父類構造器
* @param {string} className 類名標識
* @remark 使subClass繼承superClass的prototype，
* 因此subClass的例項能夠使用superClass的prototype中定義的所有屬性和方法。<br>
* 這個函式實際上是建立了subClass和superClass的原型鏈整合，並對subClass進行了constructor修正。<br>
* <strong>注意：如果要繼承建構函式，需要在subClass裡面call一下，具體見下面的demo例子</strong>
* @shortcut inherits
* @meta standard
* @see baidu.lang.Class
*/
baidu.lang.inherits = function (subClass, superClass, className) {
var key, proto,
selfProps = subClass.prototype,
clazz = new Function();
clazz.prototype = superClass.prototype;
proto = subClass.prototype = new clazz();
for (key in selfProps) {
proto[key] = selfProps[key];
}
subClass.prototype.constructor = subClass;
subClass.superClass = superClass.prototype;
if ("string" == typeof className) {
proto._className = className;
}
};
/**
* @ignore
* @namespace baidu.dom 操作dom的方法。
*/
baidu.dom = baidu.dom || {};
/**
* 從文件中獲取指定的DOM元素
*
* @param {string|HTMLElement} id 元素的id或DOM元素
* @meta standard
* @return {HTMLElement} DOM元素，如果不存在，返回null，如果引數不合法，直接返回引數
*/
baidu._g = baidu.dom._g = function (id) {
if (baidu.lang.isString(id)) {
return document.getElementById(id);
}
return id;
};
/**
* 從文件中獲取指定的DOM元素
* @name baidu.dom.g
* @function
* @grammar baidu.dom.g(id)
* @param {string|HTMLElement} id 元素的id或DOM元素
* @meta standard
*
* @returns {HTMLElement|null} 獲取的元素，查詢不到時返回null,如果引數不合法，直接返回引數
*/
baidu.g = baidu.dom.g = function (id) {
if ('string' == typeof id || id instanceof String) {
return document.getElementById(id);
} else if (id && id.nodeName && (id.nodeType == 1 || id.nodeType == 9)) {
return id;
}
return null;
};
/**
* 在目標元素的指定位置插入HTML程式碼
* @name baidu.dom.insertHTML
* @function
* @grammar baidu.dom.insertHTML(element, position, html)
* @param {HTMLElement|string} element 目標元素或目標元素的id
* @param {string} position 插入html的位置資訊，取值為beforeBegin,afterBegin,beforeEnd,afterEnd
* @param {string} html 要插入的html
* @remark
*
* 對於position引數，大小寫不敏感<br>
* 引數的意思：beforeBegin<span>afterBegin this is span! beforeEnd</span> afterEnd <br />
* 此外，如果使用本函式插入帶有script標籤的HTML字串，script標籤對應的指令碼將不會被執行。
*
* @shortcut insertHTML
* @meta standard
*
* @returns {HTMLElement} 目標元素
*/
baidu.insertHTML = baidu.dom.insertHTML = function (element, position, html) {
element = baidu.dom.g(element);
var range,begin;
if (element.insertAdjacentHTML) {
element.insertAdjacentHTML(position, html);
} else {
// 這裡不做"undefined" != typeof(HTMLElement) && !window.opera判斷，其它瀏覽器將出錯？！
// 但是其實做了判斷，其它瀏覽器下等於這個函式就不能執行了
range = element.ownerDocument.createRange();
// FF下range的位置設定錯誤可能導致建立出來的fragment在插入dom樹之後html結構亂掉
// 改用range.insertNode來插入html, by wenyuxiang @ 2010-12-14.
position = position.toUpperCase();
if (position == 'AFTERBEGIN' || position == 'BEFOREEND') {
range.selectNodeContents(element);
range.collapse(position == 'AFTERBEGIN');
} else {
begin = position == 'BEFOREBEGIN';
range[begin ? 'setStartBefore' : 'setEndAfter'](element);
range.collapse(begin);
}
range.insertNode(range.createContextualFragment(html));
}
return element;
};
/**
* 為目標元素新增className
* @name baidu.dom.addClass
* @function
* @grammar baidu.dom.addClass(element, className)
* @param {HTMLElement|string} element 目標元素或目標元素的id
* @param {string} className 要新增的className，允許同時新增多個class，中間使用空白符分隔
* @remark
* 使用者應保證提供的className合法性，不應包含不合法字元，className合法字元參考：http://www.w3.org/TR/CSS2/syndata.html。
* @shortcut addClass
* @meta standard
*
* @returns {HTMLElement} 目標元素
*/
baidu.ac = baidu.dom.addClass = function (element, className) {
element = baidu.dom.g(element);
var classArray = className.split(/\s+/),
result = element.className,
classMatch = " " + result + " ",
i = 0,
l = classArray.length;
for (; i < l; i++){
if ( classMatch.indexOf( " " + classArray[i] + " " ) < 0 ) {
result += (result ? ' ' : '') + classArray[i];
}
}
element.className = result;
return element;
};
/**
* @ignore
* @namespace baidu.event 遮蔽瀏覽器差異性的事件封裝。
* @property target 事件的觸發元素
* @property pageX 滑鼠事件的滑鼠x座標
* @property pageY 滑鼠事件的滑鼠y座標
* @property keyCode 鍵盤事件的鍵值
*/
baidu.event = baidu.event || {};
/**
* 事件監聽器的儲存表
* @private
* @meta standard
*/
baidu.event._listeners = baidu.event._listeners || [];
/**
* 為目標元素新增事件監聽器
* @name baidu.event.on
* @function
* @grammar baidu.event.on(element, type, listener)
* @param {HTMLElement|string|window} element 目標元素或目標元素id
* @param {string} type 事件型別
* @param {Function} listener 需要新增的監聽器
* @remark
* 1. 不支援跨瀏覽器的滑鼠滾輪事件監聽器新增<br>
* 2. 改方法不為監聽器灌入事件物件，以防止跨iframe事件掛載的事件物件獲取失敗
* @shortcut on
* @meta standard
* @see baidu.event.un
*
* @returns {HTMLElement|window} 目標元素
*/
baidu.on = baidu.event.on = function (element, type, listener) {
type = type.replace(/^on/i, '');
element = baidu._g(element);
var realListener = function (ev) {
// 1. 這裡不支援EventArgument, 原因是跨frame的事件掛載
// 2. element是為了修正this
listener.call(element, ev);
},
lis = baidu.event._listeners,
filter = baidu.event._eventFilter,
afterFilter,
realType = type;
type = type.toLowerCase();
// filter過濾
if(filter && filter[type]){
afterFilter = filter[type](element, type, realListener);
realType = afterFilter.type;
realListener = afterFilter.listener;
}
// 事件監聽器掛載
if (element.addEventListener) {
element.addEventListener(realType, realListener, false);
} else if (element.attachEvent) {
element.attachEvent('on' + realType, realListener);
}
// 將監聽器儲存到陣列中
lis[lis.length] = [element, type, listener, realListener, realType];
return element;
};
/**
* 為目標元素移除事件監聽器
* @name baidu.event.un
* @function
* @grammar baidu.event.un(element, type, listener)
* @param {HTMLElement|string|window} element 目標元素或目標元素id
* @param {string} type 事件型別
* @param {Function} listener 需要移除的監聽器
* @shortcut un
* @meta standard
*
* @returns {HTMLElement|window} 目標元素
*/
baidu.un = baidu.event.un = function (element, type, listener) {
element = baidu._g(element);
type = type.replace(/^on/i, '').toLowerCase();
var lis = baidu.event._listeners,
len = lis.length,
isRemoveAll = !listener,
item,
realType, realListener;
//如果將listener的結構改成json
//可以節省掉這個迴圈，優化效能
//但是由於un的使用頻率並不高，同時在listener不多的時候
//遍歷陣列的效能消耗不會對程式碼產生影響
//暫不考慮此優化
while (len--) {
item = lis[len];
// listener存在時，移除element的所有以listener監聽的type型別事件
// listener不存在時，移除element的所有type型別事件
if (item[1] === type
&& item[0] === element
&& (isRemoveAll || item[2] === listener)) {
realType = item[4];
realListener = item[3];
if (element.removeEventListener) {
element.removeEventListener(realType, realListener, false);
} else if (element.detachEvent) {
element.detachEvent('on' + realType, realListener);
}
lis.splice(len, 1);
}
}
return element;
};
/**
* 阻止事件的預設行為
* @name baidu.event.preventDefault
* @function
* @grammar baidu.event.preventDefault(event)
* @param {Event} event 事件物件
* @meta standard
*/
baidu.preventDefault = baidu.event.preventDefault = function (event) {
if (event.preventDefault) {
event.preventDefault();
} else {
event.returnValue = false;
}
};
})();
/**
* @exports DistanceTool as BMapLib.DistanceTool
*/
var DistanceTool =
/**
* DistanceTool類的建構函式
* @class 距離測算類，實現測距效果的<b>入口</b>。
* 例項化該類後，即可呼叫該類提供的open
* 方法開啟測距狀態。
*
* @constructor
* @param {Map} map Baidu map的例項物件
* @param {Json Object} opts 可選的輸入引數，非必填項。可輸入選項包括：<br />
* {"<b>followText</b>" : {String} 測距過程中，提示框文字,
* <br />"<b>unit</b>" : {String} 測距結果所用的單位制，可接受的屬性為"metric"表示米制和"us"表示美國傳統單位,
* <br />"<b>lineColor</b>" : {String} 折線顏色,
* <br />"<b>lineStroke</b>" : {Number} 折線寬度,
* <br />"<b>opacity</b>" : {Number} 透明度,
* <br />"<b>lineStyle</b>" : {String} 折線的樣式，只可設定solid和dashed,
* <br />"<b>secIcon</b>" : {BMap.Icon} 轉折點的Icon,
* <br />"<b>closeIcon</b>" : {BMap.Icon} 關閉按鈕的Icon,
* <br />"<b>cursor</b>" : {String} 跟隨的滑鼠樣式}
*
* @example <b>參考示例：</b><br />
* var map = new BMap.Map("container");<br />map.centerAndZoom(new BMap.Point(116.404, 39.915), 15);<br />var myDistanceToolObject = new BMapLib.DistanceTool(map, {lineStroke : 2});
*/
BMapLib.DistanceTool = function(map, opts){
if (!map) {
return;
}
/**
* map物件
* @private
* @type {Map}
*/
this._map = map;
opts = opts || {};
/**
* _opts是預設引數賦值。
* 下面通過使用者輸入的opts，對預設引數賦值
* @private
* @type {Json}
*/
this._opts = baidu.extend(
baidu.extend(this._opts || {}, {
/**
* 測距提示
* @private
* @type {String}
*/
tips : "測距",
/**
* 測距過程中，提示框文字
* @private
* @type {String}
*/
followText : "單擊確定地點，雙擊結束",
/**
* 測距結果所用的單位制，可接受的屬性為"metric"表示米制和"us"表示美國傳統單位
* @private
* @type {String}
*/
unit : "metric",
/**
* 折線顏色
* @private
* @type {String}
*/
lineColor : "#ff6319",
/**
* 折線線寬
* @private
* @type {Number}
*/
lineStroke : 2,
/**
* 折線透明度
* @private
* @type {Number}
*/
opacity : 0.8,
/**
* 折線樣式
* @private
* @type {String}
*/
lineStyle : "solid",
/**
* 跟隨滑鼠樣式
* @private
* @type {String}
*/
cursor : "http://api.map.baidu.com/images/ruler.cur",
/**
* 轉折點的ICON樣式
* @private
* @type {BMap.Icon}
*/
secIcon : null,
/**
* 轉折點的ICON樣式
* @private
* @type {BMap.Icon}
*/
closeIcon : null
})
, opts);
/**
* 跟隨的title覆蓋物
* @private
* @type {BMap.Label}
*/
this._followTitle = null;
/**
* 折線包含所有點的陣列
* @private
* @type {Array}
*/
this._points = [];
/**
* 折線所包含的所有path陣列
* @private
* @type {Array}
*/
this._paths = [];
/**
* 折線結點圖片陣列
* @private
* @type {Array}
*/
this._dots = [];
/**
* 折線測距包含所有線段的距離
* @private
* @type {Array}
*/
this._segDistance = [];
/**
* 覆蓋物的陣列
* @private
* @type {Array}
*/
this._overlays = [];
/**
* 是否在呼叫map.clearOverlays清除畫線需要建立的相關overlay元素
* @private
* @type {Boolean}
*/
this._enableMassClear = true,
/**
* 單位制，儲存語言包中定義的單位名稱
* @private
* @type {Json}
*/
this._units = {
// metric 表示米制
metric : {
/**
* 米制的名稱
* @type {String}
*/
name : "metric",
/**
* 和米制的換算關係
* @type {Number}
*/
conv : 1,
/**
* 米制單位下兩個單位制之間的換算關係
* @type {Number}
*/
incon : 1000,
/**
* 米制單位下較小單位
* @type {String}
*/
u1 : "米",
/**
* 米制單位下較大單位
* @type {String}
*/
u2 : "公里"
},
// us 表示美國傳統單位，各引數意義同上metric
us : {
name : "us",
conv : 3.2808,
incon : 5279.856,
u1 : "英尺",
u2 : "英里"
}
};
/**
* 是否已經開啟了測距狀態
* @private
* @type {Boolean}
*/
this._isOpen = false;
/**
* 未點選任何一點時，滑鼠移動時的跟隨提示文字
* @private
* @type {String}
*/
this._startFollowText = "單擊確定起點";
/**
* 地圖移動的計時器
* @private
* @type {Object}
*/
this._movingTimerId = null;
/**
* 測距需要新增的CSS樣式
* @private
* @type {Json}
*/
this._styles = {
"BMapLib_diso" : "height:17px;width:5px;position:absolute;background:url(http://api.map.baidu.com/images/dis_box_01.gif) no-repeat left top"
,"BMapLib_disi" : "color:#7a7a7a;position:absolute;left:5px;padding:0 4px 1px 0;line-height:17px;background:url(http://api.map.baidu.com/images/dis_box_01.gif) no-repeat right top"
,"BMapLib_disBoxDis" : "color:rgb(51, 51, 51);font-weight:bold"
};
if (this._opts.lineStroke <= 0) {
this._opts.lineStroke = 2;
}
if (this._opts.opacity > 1) {
this._opts.opacity = 1;
} else if (this._opts.opacity < 0) {
this._opts.opacity = 0;
}
if (this._opts.lineStyle != "solid" &&
this._opts.lineStyle != "dashed") {
this._opts.lineStyle = "solid";
}
if (!this._units[this._opts.unit]) {
this._opts.unit = "metric";
}
this.text = "測距";
}
// 通過baidu.lang下的inherits方法，讓DistanceTool繼承baidu.lang.Class
baidu.lang.inherits(DistanceTool, baidu.lang.Class, "DistanceTool");
/**
* 地圖區域的移動事件繫結
* @return 無返回值
*/
DistanceTool.prototype._bind = function(){
// 設定滑鼠樣式
this._setCursor(this._opts.cursor);
var me = this;
// 在裝載地圖的頁面元素上，繫結滑鼠移動事件
baidu.on(this._map.getContainer(), "mousemove", function(e){
if (!me._isOpen) {
return;
}
if (!me._followTitle) {
return;
}
e = window.event || e;
var t = e.target || e.srcElement;
// 如果觸發該事件的頁面元素不是遮蓋效果層，則返回，無操作
if (t != OperationMask.getDom(me._map)) {
me._followTitle.hide();
return;
}
if (!me._mapMoving) {
me._followTitle.show();
}
// 設定滑鼠移動過程中，跟隨的文字提示框的位置
var pt = OperationMask.getDrawPoint(e, true);
me._followTitle.setPosition(pt);
});
// 建立滑鼠跟隨的文字提示框
if (this._startFollowText) {
var t = this._followTitle = new BMap.Label(this._startFollowText, {offset : new BMap.Size(14, 16)});
this._followTitle.setStyles({color : "#333", borderColor : customStyle.borderColor});
}
};
/**
* 開啟地圖的測距狀態
* @return {Boolean}，開啟測距狀態成功，返回true；否則返回false。
*
* @example <b>參考示例：</b><br />
* myDistanceToolObject.open();
*/
DistanceTool.prototype.open = function(){
// 判斷測距狀態是否已經開啟
if (this._isOpen == true){
return true;
}
// 已有其他地圖上的滑鼠操作工具開啟
if (!!BMapLib._toolInUse) {
return;
}
this._isOpen = true;
BMapLib._toolInUse = true;
// 判斷是否是否在移動過程中
if (this._mapMoving){
delete this._mapMoving;
}
var me = this;
// 增加滑鼠在地圖區域移動的事件
// 通過binded引數，避免多次繫結
if (!this._binded) {
this._binded = true;
// 繫結控制元件項事件
this._bind();
// 地圖的移動過程中，需要隱藏相關的提示框
this._map.addEventListener("moving", function(){
me._hideCurrent();
});
}
// 將文字提示框作為BMap.Label元素，提交給Map Api進行管理
if (this._followTitle) {
this._map.addOverlay(this._followTitle);
this._followTitle.hide();
}
/**
* 測距過程中，點選地圖時，觸發的操作
* @ignore
* @param {Object} e event物件
*/
var distClick = function(e) {
var map = me._map;
if (!me._isOpen) {
return;
}
// 通過event物件，計算得出點選位置的物理座標，poi為一個BMap.Point物件
e = window.event || e;
var poi = OperationMask.getDrawPoint(e, true);
// 驗證計算得出的該點的位置合理性
if (!me._isPointValid(poi)) {
return;
}
//判斷標點所屬城市，非本城市不允許標點
geoc.getLocation(poi, function(rs){
var addComp = rs.addressComponents;
//海南省的都不限，海南站點包含了海南全部的城市
//崑山是蘇州下面的一個縣級市，也需要特殊處理
if((city == '海南' && addComp.province == '海南省')
|| (city == '崑山' && addComp.city == '蘇州市' && addComp.district == '崑山市')){
}else if(addComp.city.replace('市','') != city){
alert('只能在本城市範圍內標點');
isSelfCity = false;
return false;
}
//else{
// 記錄當前點的螢幕位置
me._bind.initX = e.pageX || e.clientX || 0;
me._bind.initY = e.pageY || e.clientY || 0;
// 這個if迴圈內的計算是，判斷當前這個點，與儲存內的最後一個點的距離，
// 如果距離過小，比如小於5，可以認為是使用者的誤點，可以忽略掉
if (me._points.length > 0){
var lstPx = map.pointToPixel(me._points[me._points.length - 1]);
var thisPx = map.pointToPixel(poi);
var dis = Math.sqrt(Math.pow(lstPx.x - thisPx.x, 2) + Math.pow(lstPx.y - thisPx.y, 2));
if (dis < 5) {
return;
}
}
pointList[pointList.length] = poi;
//處理ie相容問題，ie下使用e.layerX時定位有偏差
if(/msie|rv:11|windows\snt\s10/.test(navigator.userAgent.toLowerCase())){
me._bind.x = e.offsetX || e.layerX || 0;
me._bind.y = e.offsetY || e.layerY || 0;
}else{
me._bind.x = e.layerX || e.offsetX || 0;
me._bind.y = e.layerY || e.offsetY || 0;
}
me._points.push(poi);
// 新增測距結點
me._addSecPoint(poi);
// 調整跟蹤滑鼠的標籤
if (me._paths.length == 0) {
me._formatTitle(1, me._opts.followText, me._getTotalDistance());
}
// 修改確定線的顏色
if (me._paths.length > 0) {
me._paths[me._paths.length - 1].show();
me._paths[me._paths.length - 1].setStrokeOpacity(me._opts.opacity);
}
var path = new BMap.Polyline([poi, poi], {enableMassClear : me._enableMassClear});
me._map.addOverlay(path);
me._paths.push(path);
me._overlays.push(path);
addOverlayList[addOverlayList.length] = path;
// 測距模式下線樣式固定
path.setStrokeWeight(me._opts.lineStroke);
path.setStrokeColor(me._opts.lineColor);
path.setStrokeOpacity(me._opts.opacity / 2);
path.setStrokeStyle(me._opts.lineStyle);
// 如果地圖正在移動則隱藏掉
if (me._mapMoving){
path.hide();
}
if (me._points.length > 1) {
var siblingPath = me._paths[me._points.length - 2];
siblingPath.setPositionAt(1, poi);
}
// 生成節點旁邊的距離顯示框
var disText = "";
if (me._points.length > 1) {
// 非起點的節點，顯示當前的距離
var segDis = me._setSegDistance(me._points[me._points.length - 2], me._points[me._points.length - 1]);
var meters = me._getTotalDistance();
disText = me._formatDisStr(meters);
var disLabel = new BMap.Label(disText, {offset : new BMap.Size(-15, -50), enableMassClear : me._enableMassClear});
//disLabel.setStyles({color : "#333", borderColor : "#ff0103"});
disLabel.setStyles({color : "#333", borderColor : customStyle.borderColor});
me._map.addOverlay(disLabel);
me._formatSegLabel(disLabel, disText);
me._overlays.push(disLabel);
poi.disLabel = disLabel;
disLabel.setPosition(poi);
addOverlayList[addOverlayList.length] = disLabel;
} else {
//disText = "起點";
}
/**
* 測距過程中，每次點選底圖新增節點時，派發事件的介面
* @name DistanceTool#onaddpoint
* @event
* @param {Event Object} e 回撥函式會返回event引數，包括以下返回值：
* <br />{"<b>point</b> : {BMap.Point} 最新新增上的節點BMap.Point物件,
* <br />"<b>pixel</b>：{BMap.pixel} 最新新增上的節點BMap.Pixel物件,
* <br />"<b>index</b>：{Number} 最新新增的節點的索引,
* <br />"<b>distance</b>：{Number} 截止最新新增的節點的總距離}
*
* @example <b>參考示例：</b><br />
* myDistanceToolObject.addEventListener("addpoint", function(e) { alert(e.distance); });
*/
// 生成名為onaddpoint的baidu.lang.Event物件
// 並給該event物件新增上point、pixel、index和distance等屬性欄位
// 然後在此刻，將繫結在onaddpoint上事件，全部賦予event引數，然後派發出去
var event = new baidu.lang.Event("onaddpoint");
event.point = poi;
event.pixel = me._map.pointToPixel(poi);
event.index = me._points.length - 1;
event.distance = me._getTotalDistance().toFixed(0);
me.dispatchEvent(event);
//}
});
};
/**
* 測距過程中，滑鼠在地圖上移動時，觸發的操作
* @ignore
* @param {Object} e event物件
*/
var distMove = function(e) {
if (!me._isOpen){
return;
}
// 通過判斷陣列me._paths的長度，判斷當前是否已經有測量節點
// 也就是，如果沒有節點，則還沒有開始測量
if (me._paths.length > 0) {
// 通過event引數，計算當前點的位置
e = window.event || e;
var curX = e.pageX || e.clientX || 0;
var curY = e.pageY || e.clientY || 0;
if (typeof me._bind.initX == "undefined") {
//處理ie相容問題，ie下使用e.layerX時定位有偏差
if(/msie|rv:11|windows\snt\s10/.test(navigator.userAgent.toLowerCase())){
me._bind.x = e.offsetX || e.layerX || 0;
me._bind.y = e.offsetY || e.layerY || 0;
}else{
me._bind.x = e.layerX || e.offsetX || 0;
me._bind.y = e.layerY || e.offsetY || 0;
}
me._bind.initX = curX;
me._bind.initY = curY;
}
var x = me._bind.x + curX - me._bind.initX;
var y = me._bind.y + curY - me._bind.initY;
// 修改最後一條折線的終點位置，使之隨著滑鼠移動畫線
var path = me._paths[me._paths.length - 1];
var poi = me._map.pixelToPoint(new BMap.Pixel(x, y));
path.setPositionAt(1, poi);
if (!me._mapMoving) {
path.show();
}
var dx = 0;
var dy = 0;
// 計算當前滑鼠位置，是否靠近邊界、或者已經出了邊界
// 如果在邊界位置，則需要向對應的方向移動地圖，來進行測量
// 每次移動的距離，設定為8
if (x < 10) {
dx = 8;
} else if (x > me._map.getSize().width - 10){
dx = -8;
}
if (y < 10) {
dy = 8;
} else if (y > me._map.getSize().height - 10){
dy = -8;
}
// 如果dx和dy都等於0，表明不需要移動地圖
if (dx != 0 || dy != 0){
// 此時需要向一個方向，平移地圖
if (!distMove._movingTimerId){
me._mapMoving = true;
me._map.panBy(dx, dy, {noAnimation : true});
me._movingTimerId = distMove._movingTimerId = setInterval(function(){
me._map.panBy(dx, dy, {noAnimation : true});
}, 30);
// 地圖移動過程中，隱藏線段和標籤
path.hide();
me._followTitle && me._followTitle.hide();
}
} else {
if (distMove._movingTimerId) {
// 此時使用者不在需要移動地圖來測量，可以清除計時器
clearInterval(distMove._movingTimerId);
delete distMove._movingTimerId;
delete me._movingTimerId;
// 顯示跟隨提示框，並修改線路位置
var lstP = me._paths[me._paths.length - 1];
var poiN = me._map.pixelToPoint(new BMap.Pixel(x, y));
if (!lstP) {
return;
}
lstP.setPositionAt(1, poiN);
lstP.show();
if (me._followTitle) {
me._followTitle.setPosition(poiN);
me._followTitle.show();
}
me._bind.i = 0;
me._bind.j = 0;
delete me._mapMoving;
}
}
// 實時更新文字提示框中的距離
if (me._followTitle) {
var td = me._getTotalDistance();
var dis = me._map.getDistance(me._points[me._points.length - 1], poi);
me._updateInstDis(me._followTitle, td + dis);
}
} else {
// 此時使用者還沒有開始測量，只是滑鼠隨便在地圖上移動
if (me._followTitle) {
me._followTitle.show();
e = window.event || e;
var t = e.target || e.srcElement;
if (t != OperationMask.getDom()) {
me._followTitle.hide();
}
}
}
};
/**
* 測距要結束時，雙擊地圖，觸發的操作
* @ignore
* @param {Object} e event物件
*/
var distDblclick = function(e) {
if (!me._isOpen) {
return;
}
// 結束時，刪除繫結的事件
baidu.un(OperationMask.getDom(me._map), "click", distClick);
baidu.un(document, "mousemove", distMove);
baidu.un(OperationMask.getDom(me._map), "dblclick", distDblclick);
baidu.un(document, "keydown", distKeyDown);
baidu.un(OperationMask.getDom(me._map), "mouseup", distMouseUp);
// 呼叫close()關閉測距狀態
setTimeout(function(){
//me.close();
me.newClose();
}, 50);
};
/**
* 測距時的鍵盤操作
* @ignore
* @param {Object} e event物件
*/
var distKeyDown = function(e){
e = window.event || e;
if (e.keyCode == 27){
// [ESC]退出本次測距
me._clearCurData();
setTimeout(function(){
//me.close();
me.newClose();
}, 50);
}
};
/**
* 測距過程中，滑鼠彈起時，觸發的操作
* @ignore
* @param {Object} e event物件
*/
var distMouseUp = function(e) {
e = window.event || e;
var ieVersion = 0;
if(/msie|rv:11|windows\snt\s10/.test(navigator.userAgent.toLowerCase())){
ieVersion = document.documentMode || + RegExp['\x241'];
}
if (ieVersion &&
e.button != 1 ||
e.button == 2){
//me.close();
//me.newClose();
}
};
// 初始化儲存資料
if(isPointOver){
me._initData();
isPointOver = false;
}
// 調整title的內容
this._formatTitle();
// 建立透明覆蓋層，並設定滑鼠樣式
OperationMask.show(this._map);
this._setCursor(this._opts.cursor);
// 繫結全部事件
baidu.on(OperationMask.getDom(this._map), "click", distClick);
baidu.on(document, "mousemove", distMove);
baidu.on(OperationMask.getDom(this._map), "dblclick", distDblclick);
baidu.on(document, "keydown", distKeyDown);
baidu.on(OperationMask.getDom(this._map), "mouseup", distMouseUp);
// 將繫結的事件、和對應的繫結物件，記錄在陣列中
this.bindFunc = [
{elem : OperationMask.getDom(this._map), type : "click", func : distClick},
{elem : OperationMask.getDom(this._map), type : "dblclick", func : distDblclick},
{elem : document, type : "mousemove", func : distMove},
{elem : document, type : "keydown", func : distKeyDown},
{elem : OperationMask.getDom(this._map), type : "mouseup", func : distMouseUp}];
return true;
};
/**
* 畫線結束時，派發drawend事件
* @return 無返回值
*/
DistanceTool.prototype._dispatchLastEvent = function() {
/**
* 測距時，每次雙擊底圖結束當前測距折線時，派發事件的介面
* @name DistanceTool#ondrawend
* @event
* @param {Event Object} e 回撥函式會返回event引數，包括以下返回值：
* <br />{"<b>points</b> : {BMap.Point} 所有測量時，打下的節點BMap.Point物件,
* <br />"<b>overlays</b>：{Array} 所有測量時，生成的線段BMap.Overlay物件,
* <br />"<b>distance</b>：{Number} 測量解釋時的最終距離}
*
* @example <b>參考示例：</b><br />
* myDistanceToolObject.addEventListener("drawend", function(e) { alert(e.distance); });
*/
// 生成名為ondrawend的baidu.lang.Event物件
// 並給該event物件新增上points、overlays和distance等屬性欄位
// 然後在此刻，將繫結在ondrawend上事件，全部賦予event引數，然後派發出去
var event = new baidu.lang.Event("ondrawend");
event.points =
this._points ?
this._points.slice(0) :
[];
event.overlays =
this._paths ?
this._paths.slice(0, this._paths.length - 1) :
[];
event.distance = this._getTotalDistance().toFixed(0);
this.dispatchEvent(event);
};
/**
* 關閉測距狀態
* @return 無返回值
*
* @example <b>參考示例：</b><br />
* myDistanceToolObject.close();
*/
DistanceTool.prototype.close = function(){
if (this._isOpen == false){
return;
}
this._isOpen = false;
BMapLib._toolInUse = false;
if (this._mapMoving){
delete this._mapMoving;
}
var me = this;
me._dispatchLastEvent();
//if (me._points.length < 2){
if (me._points.length < 1){
// 不是有效繪製，清除所有內容
me._clearCurData();
pointList = [];
} else if(me._points.length > 1) {
me._paths[me._paths.length - 1].remove();
me._paths[me._paths.length - 1] = null;
me._paths.length = me._paths.length - 1;
// 移除最近一次標記
var pt = me._points[me._points.length - 1];
if (pt.disLabel){
pt.disLabel.remove();
}
me._processLastOp();
}
OperationMask.hide();
// 刪除繫結的事件
for (var i = 0, l = this.bindFunc.length; i < l; i ++){
baidu.un(this.bindFunc[i].elem, this.bindFunc[i].type, this.bindFunc[i].func);
}
// 停止地圖移動
if (me._movingTimerId){
clearInterval(me._movingTimerId);
me._movingTimerId = null;
}
if (this._followTitle){
this._followTitle.hide();
}
};
/**
* 點選確認提交前，雙擊結束測距時響應
*/
DistanceTool.prototype.newClose = function(){
if (this._isOpen == false){
return;
}
this._isOpen = false;
BMapLib._toolInUse = false;
if (this._mapMoving){
delete this._mapMoving;
}
var me = this;
me._dispatchLastEvent();
OperationMask.hide();
// 停止地圖移動
if (me._movingTimerId){
clearInterval(me._movingTimerId);
me._movingTimerId = null;
}
if (this._followTitle){
this._followTitle.hide();
}
//改變滑鼠形狀
//OperationMask._setCursor('pointer');
//me._setCursor('http://api0.map.bdimg.com/images/openhand.cur');
}
/**
* 清除本次測距的暫存資料
* @return 無返回值
*/
DistanceTool.prototype._clearCurData = function(){
for (var i = 0, l = this._points.length; i < l; i ++){
if (this._points[i].disLabel){
this._points[i].disLabel.remove();
}
}
for (var i = 0, l = this._paths.length; i < l; i ++){
this._paths[i].remove();
}
for (var i = 0, l = this._dots.length; i < l; i ++){
this._dots[i].remove();
}
this._initData();
};
/**
* 初始化儲存陣列
* @return 無返回值
*/
DistanceTool.prototype._initData = function(){
// 初始化point陣列
this._points.length = 0;
// 初始化path陣列
this._paths.length = 0;
// 初始化分段距離陣列
this._segDistance.length = 0;
// 初始化結點影象陣列
this._dots.length = 0;
};
/**
* 計算兩點之間距離並存放在分段距離陣列中
* @param {Point}
* @param {Point}
* @return {Number} 兩個地理點之間的距離
*/
DistanceTool.prototype._setSegDistance = function(pt0, pt1){
if (!pt0 || !pt1){
return;
}
var dis = this._map.getDistance(pt0, pt1);
this._segDistance.push(dis);
return dis;
};
/**
* 獲得總距離
* @return {Number} 總距離
*/
DistanceTool.prototype._getTotalDistance = function(){
var totalDis = 0;
for (var i = 0, l = this._segDistance.length; i < l; i ++){
totalDis += this._segDistance[i];
}
return totalDis;
};
/**
* 將米制單位的數值換算成為目標單位下的數值
* @type {Number} 需要轉換的數值
* @type {String} 字串描述的目標單位，
* "metric" 表示米制單位，
* "us" 表示美國傳統單位制
* @return {Number} 轉換後的數值
*/
DistanceTool.prototype._convertUnit = function(num, unit){
unit = unit || "metric";
if (this._units[unit]){
return num * this._units[unit].conv;
}
return num;
};
/**
* 新增測距結點
* @param {BMap.Point} 節點
* @return 無返回值
*/
DistanceTool.prototype._addSecPoint = function(pt){
var ico =
this._opts.secIcon ?
this._opts.secIcon :
new BMap.Icon("http://api.map.baidu.com/images/mapctrls.png", new BMap.Size(11, 11), {imageOffset: new BMap.Size(-26, -313)});
var secPt = new BMap.Marker(pt, {
icon : ico,
clickable : false,
baseZIndex : 3500000,
zIndexFixed : true,
enableMassClear : this._enableMassClear
});
secPt.setOffset(new BMap.Size(-2,-15));
this._map.addOverlay(secPt);
addOverlayList[addOverlayList.length] = secPt;
this._dots.push(secPt);
};
/**
* 格式化距離字串
* @param {Number} 距離
* @return {String} 格式化的字串
*/
DistanceTool.prototype._formatDisStr = function(distance){
var u = this._opts.unit;
var unit = this._units[u].u1;
var dis = this._convertUnit(distance, u);
/*if (dis > this._units[u].incon){
dis = dis / this._units[u].incon;
unit = this._units[u].u2;
dis = dis.toFixed(2);
} else {
dis = dis.toFixed(0);
}*/
dis = dis.toFixed(0);
return dis + unit;
};
/**
* 設定滑鼠樣式
* @param {String} cursor 滑鼠樣式
* @return 沒有返回值
*/
DistanceTool.prototype._setCursor = function(cursor){
// 由於webkit核心瀏覽器下，cursor設定後預設不會居中，所以需要對偏移值進行設定
cursor = cursor == '' ? this._opts.cursor : cursor;
var csr =
/webkit/.test(navigator.userAgent.toLowerCase()) ?
"url(" + cursor + ") 3 6, crosshair" :
"url(" + cursor + "), crosshair"
OperationMask._setCursor(csr);
};
/**
* 獲取滑鼠樣式
* @return {String} 跟隨的滑鼠樣式
*/
DistanceTool.prototype._getCursor = function(){
return this._opts.cursor;
};
/**
* 調整分段距離樣式
* @param {BMap.Label} label 提示框的Label
* @param {String} 需要填入的文字
* @return 沒有返回值
*/
DistanceTool.prototype._formatSegLabel = function(label, text){
label.setStyle({"border" : "none", "padding" : "0"});
label.setContent("<span style='" + this._styles.BMapLib_diso + "'><span style='" + this._styles.BMapLib_disi + "'>" + text + "</span></span>");
};
/**
* 處理最後一次操作，當使用者雙擊或測距被強行退出時呼叫
* @return 沒有返回值
*/
DistanceTool.prototype._processLastOp = function() {
var me = this;
// 刪除上次移動臨時資料
delete me._bind.x;
delete me._bind.y;
delete me._bind.initX;
delete me._bind.initY;
// 驗證路徑
if (me._paths.length > me._points.length - 1){
var l = me._paths.length - 1;
me._paths[l].remove();
me._paths[l] = null;
me._paths.length = l;
}
// 儲存本次測距物件
var disObj = {};
disObj.points = me._points.slice(0);
disObj.paths = me._paths.slice(0);
disObj.dots = me._dots.slice(0);
disObj.segDis = me._segDistance.slice(0);
// 判斷總距離和按鈕位置
var lstPx = me._map.pointToPixel(disObj.points[disObj.points.length - 1]);
var prePx = me._map.pointToPixel(disObj.points[disObj.points.length - 2]);
var btnOffset = [0, 0];
var disOffset = [0, 0];
if (lstPx.y - prePx.y >= 0){
// 距離位於下端
disOffset = [-5, 11];
} else {
// 距離位於上端
disOffset = [-5, -50];
}
if (lstPx.x - prePx.x >= 0){
// 按鈕位於右側
btnOffset = [14, 0];
} else {
// 按鈕位於左側
btnOffset = [-14, 0];
}
// 顯示總距離
var pt = disObj.points[disObj.points.length - 1];
pt.disLabel = new BMap.Label("", {offset: new BMap.Size(-15, -40), enableMassClear: me._enableMassClear});
pt.disLabel.setStyles({color: "#333", borderColor: customStyle.borderColor});
me._map.addOverlay(pt.disLabel);
pt.disLabel.setOffset(new BMap.Size(disOffset[0], disOffset[1]));
pt.disLabel.setPosition(pt);
me._formatTitle(2, "", "", pt.disLabel);
addOverlayList[addOverlayList.length] = pt.disLabel;
// 新增關閉按鈕
/*var bico =
this._opts.closeIcon ?
this._opts.closeIcon :
new BMap.Icon("http://api.map.baidu.com/images/mapctrls.gif", new BMap.Size(12, 12), {imageOffset: new BMap.Size(0, -14)});
disObj.closeBtn = new BMap.Marker(disObj.points[disObj.points.length - 1],
{icon : bico,
offset : new BMap.Size(btnOffset[0], btnOffset[1]),
baseZIndex : 3600000,
enableMassClear : me._enableMassClear}
);
me._map.addOverlay(disObj.closeBtn);
disObj.closeBtn.setTitle("清除本次測距");
// 點選關閉按鈕，繫結關閉按鈕事件
disObj.closeBtn.addEventListener("click", function(e){
// 關閉本次測距，清除相關儲存和變數
for (var i = 0, l = disObj.points.length; i < l; i ++){
disObj.points[i].disLabel.remove();
disObj.points[i].disLabel = null;
}
for (var i = 0, l = disObj.paths.length; i < l; i ++){
disObj.paths[i].remove();
disObj.paths[i] = null;
}
for (var i = 0, l = disObj.dots.length; i < l; i ++){
disObj.dots[i].remove();
disObj.dots[i] = null;
}
disObj.closeBtn.remove();
disObj.closeBtn = null;
stopBubble(e);
/!**
* @ignore
* 測距結束後，點選線段上最後一個節點旁的關閉按鈕時，派發事件的介面
* @name DistanceTool#onremovepolyline
* @event
* @param {Event Object} e 回撥函式會返回event引數
*
* @example <b>參考示例：</b><br />
* myDistanceToolObject.addEventListener("removepolyline", function(e) { alert(e.type); });
*!/
// 生成名為onremovepolyline的baidu.lang.Event物件
// 然後在此刻，將繫結在onremovepolyline上事件，全部賦予event引數，然後派發出去
var event = new baidu.lang.Event("onremovepolyline");
me.dispatchEvent(event);
});*/
me._initData();
};
/**
* 生成測距過程中的文字提示框
* @param {String} type
* @param {String} text
* @param {String} distance
* @param {Label} label
* @return 無返回值
*/
DistanceTool.prototype._formatTitle = function(type, text, distance, label){
var title = label || this._followTitle;
if (!title){
return;
}
title.setStyle({"lineHeight" : "16px", "zIndex" : "85", "padding" : "3px 5px"});
var t = this._startFollowText || "";
var htmls = [];
if (type == 1){
// 測距過程中的提示
title.setOffset(0, 25);
var u = this._opts.unit;
var unit = this._units[u].u1;
var dis = this._convertUnit(distance, u);
/*if (dis > this._units[u].incon){
dis = dis / this._units[u].incon;
unit = this._units[u].u2;
dis = dis.toFixed(2);
} else {
dis = dis.toFixed(0);
}*/
dis = dis.toFixed(0);
htmls.push("<span>總長：<span style='" + this._styles.BMapLib_disBoxDis+"'>" + dis + "</span>" + unit + "</span><br />");
htmls.push("<span style='color:#7a7a7a'>" + text + "</span>");
} else if (type == 2) {
// 結束時的總距離展示
title.setOffset(0, 0);
var u = this._opts.unit;
var unit = this._units[u].u1;
var dis = this._convertUnit(this._getTotalDistance(), u);
/*if (dis > this._units[u].incon){
dis = dis / this._units[u].incon;
unit = this._units[u].u2;
dis = dis.toFixed(2);
} else{
dis = dis.toFixed(0);
}*/
dis = dis.toFixed(0);
htmls.push("總長：<span style='" + this._styles.BMapLib_disBoxDis + "'>" + dis + "</span>" + unit);
} else {
title.setOffset(0, 25);
htmls.push(t);
}
title.setContent(htmls.join(""));
};
/**
* 更新label的距離
* @param HTMLElement label的DOM元素
* @param Number 距離
*/
DistanceTool.prototype._updateInstDis = function(label, dis){
// 換算距離
var u = this._opts.unit;
var unit = this._units[u].u1;
/*if (dis > this._units[u].incon){
dis = dis / this._units[u].incon;
unit = this._units[u].u2;
dis = dis.toFixed(2);
} else {
dis = dis.toFixed(0);
}*/
dis = dis.toFixed(0);
// 修改Label的內容
if (label) {
var htmls = [];
htmls.push("<span>總長：<span style='" + this._styles.BMapLib_disBoxDis + "'>" + dis + "</span>" + unit + "</span><br />");
htmls.push("<span style='color:#7a7a7a'>" + this._opts.followText + "</span>");
label.setContent(htmls.join(""));
}
};
/**
* 隱藏相關的線段和提示框文字
* @return 無返回值
*/
DistanceTool.prototype._hideCurrent = function(){
if (!this._isOpen){
return;
}
if (this._paths.length > 0){
var p = this._paths[this._paths.length - 1];
p.hide();
}
this._followTitle && this._followTitle.hide();
};
/**
* 驗證傳入點的位置合理性
* @param {BMap.Point} pt 需要被驗證的point點
* @return 無返回值
*/
DistanceTool.prototype._isPointValid = function(pt){
if (!pt){
return false;
}
var mapBounds = this._map.getBounds();
var sw = mapBounds.getSouthWest(),
ne = mapBounds.getNorthEast();
if (pt.lng < sw.lng ||
pt.lng > ne.lng ||
pt.lat < sw.lat ||
pt.lat > ne.lat) {
return false;
}
return true;
};
/**
* OperationMask，透明覆蓋層，在地圖上進行滑鼠繪製操作時使用，
* 閉包，對外不暴露
*/
var OperationMask = {
/**
* map物件
* @type {Map}
*/
_map : null,
/**
* HTML字串
* @type {String}
*/
_html : "<div style='background:transparent url(http://api.map.baidu.com/images/blank.gif);position:absolute;left:0;top:0;width:100%;height:100%;z-index:1000' unselectable='on'></div>",
/**
* html元素
* @type {HTMLElement}
*/
_maskElement : null,
/**
* 滑鼠指標
* @type {String}
*/
_cursor: 'default',
/**
* 操作層是否在使用中
* @type {Boolean}
*/
_inUse: false,
/**
* 透明覆蓋層的顯示
*
* @param {Map} map map物件
* @return 無返回值
*/
show : function(map) {
if (!this._map) {
this._map = map;
}
this._inUse = true;
if (!this._maskElement) {
this._createMask(map);
}
this._maskElement.style.display = 'block';
},
/**
* 建立覆蓋層
*
* @param {Map} map map物件
* @return 無返回值
*/
_createMask : function(map) {
this._map = map;
if (!this._map) {
return;
}
baidu.insertHTML(this._map.getContainer(), "beforeEnd", this._html);
var elem = this._maskElement = this._map.getContainer().lastChild;
var stopAndPrevent = function(e) {
stopBubble(e);
return baidu.preventDefault(e);
}
baidu.on(elem, 'mouseup', function(e) {
if (e.button == 2) {
stopAndPrevent(e);
}
});
baidu.on(elem, 'contextmenu', stopAndPrevent);
elem.style.display = 'none';
},
/**
* 獲取當前繪製點的地理座標
*
* @param {Event} e e物件
* @param {Boolean} n 是否向上查到相對於地圖container元素的座標位置
* @return Point物件的位置資訊
*/
getDrawPoint : function(e, n) {
e = window.event || e;
//處理ie相容問題，ie下使用e.layerX時定位有偏差
if(/msie|rv:11|windows\snt\s10/.test(navigator.userAgent.toLowerCase())){
var x = e.offsetX || e.layerX || 0;
var y = e.offsetY || e.layerY || 0;
}else{
var x = e.layerX || e.offsetX || 0;
var y = e.layerY || e.offsetY || 0;
}
var t = e.target || e.srcElement;
if (t != OperationMask.getDom(this._map) && n == true) {
while (t && t != this._map.getContainer()) {
if (!(t.clientWidth == 0 &&
t.clientHeight == 0 &&
t.offsetParent &&
t.offsetParent.nodeName.toLowerCase() == 'td')) {
x += t.offsetLeft;
y += t.offsetTop;
}
t = t.offsetParent;
}
}
if (t != OperationMask.getDom(this._map) &&
t != this._map.getContainer()) {
return;
}
if (typeof x === 'undefined' ||
typeof y === 'undefined') {
return;
}
if (isNaN(x) || isNaN(y)) {
return;
}
return this._map.pixelToPoint(new BMap.Pixel(x, y));
},
/**
* 透明覆蓋層的隱藏
*
* @return 無返回值
*/
hide : function() {
if (!this._map) {
return;
}
this._inUse = false;
if (this._maskElement) {
this._maskElement.style.display = 'none';
}
},
/**
* 獲取HTML容器
*
* @param {Map} map map物件
* @return HTML容器元素
*/
getDom : function(map) {
if (!this._maskElement) {
this._createMask(map);
}
return this._maskElement;
},
/**
* 設定滑鼠樣式
*
* @type {String} cursor 滑鼠樣式
* @return 無返回值
*/
_setCursor : function(cursor) {
this._cursor = cursor || 'default';
if (this._maskElement) {
this._maskElement.style.cursor = this._cursor;
}
}
};
/**
* 停止事件冒泡傳播，
* 閉包，對外不暴露
*
* @type {Event} e e物件
*/
function stopBubble(e){
var e = window.event || e;
e.stopPropagation ? e.stopPropagation() : e.cancelBubble = true;
};
})();
##index.js
var pointList = []; //儲存標點的陣列
var addOverlayList = []; //儲存新增過的覆蓋物，在清除覆蓋物時使用
var isPointOver = true; //判斷此次標點是否結束,當提交儲存成功後本次才算結束，確認提交取消按鈕時還可繼續標點
var addOverlayPoints = []; //儲存顯示的標點
//儲存比例尺及其對應的米數
var zoomList = [];
zoomList[19] = 20;
zoomList[18] = 50;
zoomList[17] = 100;
zoomList[16] = 200;
zoomList[15] = 500;
zoomList[14] = 1000;
zoomList[13] = 2000;
zoomList[12] = 5000;
zoomList[11] = 10000;
zoomList[10] = 20000;
zoomList[9] = 25000;
zoomList[8] = 50000;
zoomList[7] = 100000;
zoomList[6] = 200000;
zoomList[5] = 500000;
zoomList[4] = 1000000;
zoomList[3] = 2000000;
//自定義樣式
var customStyle = {
"borderColor":"#20A0E4", //標點之間連線顏色
"redMarkerSrc":"./images/marker_red.png", //已提交的標點樣式
"blueMarkerSrc":"./images/marker_blue.png" //本次待提交的標點樣式
};
//初始化百度地圖資訊
//enableMapClick:false 設定景點不可點，預設為true，點選景點時，彈出景點詳情
var map = new BMap.Map('map_canvas',{enableMapClick:false});
map.centerAndZoom(city, 16);
map.addControl(new BMap.NavigationControl()); // 新增平移縮放控制元件
map.addControl(new BMap.ScaleControl()); // 新增比例尺控制元件
map.addControl(new BMap.OverviewMapControl()); //新增縮略地圖控制元件
map.enableScrollWheelZoom(); //啟用滾輪放大縮小
//map.disable3DBuilding();
//設定繪製鐵路線樣式
var styleJson = [{
"featureType": "railway",
"elementType": "all",
"stylers": {
"color": "#000000",
}
}]
map.setMapStyle({styleJson:styleJson});
//地圖測距功能初始化
var opts = {
"followText":"單擊確定標點，雙擊結束標點",
"lineColor":"#20A0E4",
"secIcon":new BMap.Icon(customStyle.blueMarkerSrc, new BMap.Size(21, 35)),
};
var myDis = new BMapLib.DistanceTool(map,opts);
//新增地圖是否載入完畢的事件
var bs,bssw,bsne;
map.addEventListener("tilesloaded",function(){//地圖載入完畢
bs = map.getBounds(); //獲取可視區域
bssw = bs.getSouthWest(); //可視區域左下角
bsne = bs.getNorthEast(); //可視區域右上角
//console.log("當前地圖可視範圍是：" + bssw.lng + "," + bssw.lat + "到" + bsne.lng + "," + bsne.lat);
//載入可視區域內已儲存的標點
showPoints(pointsInfo,bssw,bsne);
});
//點選開始標點
function startPunc(obj){
$(obj).hide();
$('.mapc-input').hide();
$(obj).siblings('button').eq(0).show();
myDis.open(); //開啟滑鼠測距
}
//判斷標點所屬城市
var geoc = new BMap.Geocoder();
//提交標點
function savePoints(obj){
if(myDis._isOpen && myDis._points.length > 0){
alert('請結束標點後再提交');
return false;
}
if(pointList.length == 0){
alert('請標點後再提交');
return false;
}
if(!window.confirm('確定提交嗎？提交後，已標點的座標點無法更改！')){
setTimeout(function(){
myDis.open();//點取消，停留在當前頁可繼續標點
},500);
return false;
}
var pointStr = '';
for(var i = 0, len = pointList.length; i < len; i++){
if(!pointList[i])
{
continue;
}
pointStr += pointList[i]['lng'] + '|' + pointList[i]['lat'] + ',';
}
pointStr = pointStr.substr(0,pointStr.length-1);
$.ajax({
type:'post',
url:'./savePoint.aspx',
data:{'city':city,'action':'save','pointList':pointStr},
dataType:'json',
success:function(data){
if(data.code == 100){
alert('儲存成功！');
isPointOver = true;
myDis.close();//關閉滑鼠測距大
removeOverlay(); //移除覆蓋物
//將儲存入庫的標點新增到陣列中，並展示
for(var i = 0, len = pointList.length; i < len; i++){
pointsInfo.push(pointList[i]);
}
pointList = [];
showPoints(pointsInfo,bssw,bsne);
$('.l-btn').eq(0).show();
$('.l-btn').eq(1).hide();
$('.mapc-input').show();
return true;
}else{
alert(data.msg);
return false;
}
}
});
}
//顯示已儲存標點
function showPoints(pointsInfo,bssw,bsne){
//當地圖縮放比例過大時，地圖上的點選擇性展示，而不再是展示每一個點
var curZoom = map.getZoom();//獲取當前比例尺大小
var gapsize = 1; //間隔顯示點的個數，預設每個點都展示
if(curZoom < 16 && curZoom > 2){
gapsize = zoomList[curZoom]/100;
}
for(var i = 0,len = pointsInfo.length; i < len; i++){
var key = pointsInfo[i]['lng']+','+pointsInfo[i]['lat'];
if(gapsize == 1){
if(pointsInfo[i]['lng'] >= bssw.lng && pointsInfo[i]['lng'] <= bsne.lng && pointsInfo[i]['lat'] >= bssw.lat && pointsInfo[i]['lat'] <= bsne.lat){
//座標點在該展示範圍，並且還未標點的，則標點
if(undefined == addOverlayPoints[key] || !addOverlayPoints[key]){
addOverlay(pointsInfo[i]['lng'],pointsInfo[i]['lat'],customStyle.redMarkerSrc);
}
}else if(undefined != addOverlayPoints[key] && addOverlayPoints[key] != ''){
//如果該座標點不在展示範圍就移除
map.removeOverlay(addOverlayPoints[key]);
addOverlayPoints[key] = '';
}
}else{
//如果該座標點不在展示範圍,且已標點，需要移除
if(undefined != addOverlayPoints[key] && addOverlayPoints[key] != ''){
map.removeOverlay(addOverlayPoints[key]);
addOverlayPoints[key] = '';
}
if(i%gapsize == 0 && pointsInfo[i]['lng'] >= bssw.lng && pointsInfo[i]['lng'] <= bsne.lng && pointsInfo[i]['lat'] >= bssw.lat && pointsInfo[i]['lat'] <= bsne.lat){
//座標點在該展示範圍，並且還未標點的，則標點
if(undefined == addOverlayPoints[key] || !addOverlayPoints[key]){
addOverlay(pointsInfo[i]['lng'],pointsInfo[i]['lat'],customStyle.redMarkerSrc);
}
}
}
}
}
//新增標點
function addOverlay(lng,lat,markerSrc){
var point,newIcon,marker;
point = new BMap.Point(lng,lat);
newIcon = new BMap.Icon(markerSrc, new BMap.Size(21, 35));
marker = new BMap.Marker(point,{icon:newIcon});
marker.setOffset(new BMap.Size(-2,-15)); //設定標點位置
map.addOverlay(marker); //新增標點
addOverlayPoints[lng+','+lat] = marker;
}
//移除標點、直線、文字等
function removeOverlay(){
for(var i = 0, len = addOverlayList.length; i < len; i++){
map.removeOverlay(addOverlayList[i]);
}
}
//根據地點關鍵字定位
function searchLocation(){
var keyword = $('#keyword').val();
if(!keyword) return false;
var local = new BMap.LocalSearch(map, {
renderOptions:{map: map},
pageCapacity:1,
onSearchComplete: function(results){
if (local.getStatus() == BMAP_STATUS_SUCCESS){
var objpoint=results.getPoi(0).point;
if(!objpoint){
alert("不能匹配到位置: " + keyword);
}else{
addOverlay(objpoint.lng,objpoint.lat,customStyle.blueMarkerSrc);
map.centerAndZoom(new BMap.Point(objpoint.lng,objpoint.lat), 19);
}
}
local.clearResults();
}
});
//forceLocal表示是否將搜尋範圍約束在當前城市
local.search(keyword,{forceLocal:true});
}
##savePoint.aspx.cs
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Script.Serialization;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace OneTask
{
public partial class savePoint : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Dictionary<string, object> dic = new Dictionary<string, object>();
JavaScriptSerializer jss = new JavaScriptSerializer();
dic.Add("code",100);
dic.Add("msg","儲存成功");
dic.Add("data",Request["pointList"]);
Response.Write(jss.Serialize(dic));
Response.End();
}
}
}
##資源
##執行如圖:
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