在《[GIS(三)——优化js版搜狗地图的brand标牌样式](http://blog.csdn.net/xiaoxian8023/article/details/38958285)》中,分享了一下Brand样式的修改。现在把这几次Marker和Brand的修改统一再美化一下,算作一个终极优化版吧。
这次优化的主要内容是:
1. 为整个操作的区域,添加边界
1. 为Marker更换动态图片
1. 为Brand更换半透明红色图片
1. 只显示一个Brand,每3秒切换一次
# 1.绘制边界
首先做第一个吧,在搜狗地图上添加边界,是一个很简单的、很基本的,但是又很人性化的一个功能。在官网的实例代码中,覆盖层的第21个示例代码《[画多边形区域、边自动闭合示例](http://map.sogou.com/api/documentation/javascript/api2.5/examples_doc/polygon-autoclose.html)》即是讲解了如何在地图上绘制一个多边形区域。你只要给定几个坐标点,Polygon对象会自动闭合最后一边。[点击这里](http://map.sogou.com/api/documentation/javascript/api2.5/reference.html#Polygon)看官网对Polygon类的说明。下面是实例中关键代码:
![](https://box.kancloud.cn/2016-02-18_56c53c236ba67.jpg)
可以看到new了一个Polygon的对象,其中,path参数是多边形面坐标的有序序列,说白了就是一个坐标数组。strokeColor是边界边框颜色,strokeOpacity则是边界边框的不透明度,取值0.0-1.0。strokeWeight是边界边框的宽度。fillColor是中间的填充颜色,fillOpacity是填充部分的不透明度,同样取值范围是0.0-1.0。
是不是看起来很简单呀。下面的代码是我设定的北京海淀区的边框坐标:
~~~
//加载海淀区边界坐标数据
function loadBound(){
b = [{x:12924312.5,y:4842937.5},
{x:12921625,y:4842750},
{x:12919812.5,y:4847062.5},
{x:12919375,y:4849437.5},
{x:12918625,y:4849937.5},
{x:12918000,y:4850937.5},
//{x: },
{x:12919750,y:4854187.5},
{x:12920625,y:4856187.5},
{x:12922000,y:4856250},
{x:12927062.5,y:4854812.5},
{x:12927375,y:4855937.5},
//{x: },
{x:12931312.5,y:4856437.5},
{x:12931000,y:4858500},
{x:12933000,y:4861187.5},
{x:12934812.5,y:4861375},
{x:12935875,y:4858375},
{x:12936812.5,y:4858687.5},
{x:12938437.5,y:4858000},
//{x: },
{x:12940062.5,y:4857812.5},
{x:12939187.5,y:4853875},
{x:12941000,y:4853250},
{x:12941062.5,y:4854437.5},
{x:12941937.5,y:4853562.5},
{x:12941562.5,y:4852625},
//{x: },
{x:12943125,y:4851000},
{x:12943687.5,y:4849812.5},
{x:12944812.5,y:4850375},
{x:12946000,y:4847187.5},
{x:12949062.5,y:4846000},
{x:12951687.5,y:4847562.5},
{x:12952812.5,y:4848000},
// {x: },
{x:12954750,y:4847000},
{x:12953312.5,y:4845625},
{x:12955812.5,y:4844250},
{x:12956062.5,y:4842937.5},
{x:12951500,y:4841937.5},
{x:12954687.5,y:4836187.5},
{x:12954875,y:4833375},
//{x: },
{x:12953718.75,y:4833406.25},
{x:12953906.25,y:4830593.75},
{x:12952156.25,y:4830125},
{x:12952062.5,y:4831281.25},
{x:12951593.75,y:4831156.25},
{x:12951625,y:4829812.5},
//{x: },
{x:12949000,y:4829750},
{x:12949500,y:4829156.25},
{x:12949875,y:4824531.25},
{x:12949656.25,y:4823187.5},
{x:12947187.5,y:4823187.5},
{x:12945343.75,y:4821718.75},
{x:12945375,y:4823156.25},
//{x: },
{x:12940718.75,y:4823187.5},
{x:12940687.5,y:4825937.5},
{x:12940375,y:4826125},
{x:12940625,y:4826781.25},
{x:12938031.25,y:4826375},
{x:12936031.25,y:4826031.25},
{x:12935718.75,y:4826281.25},
{x:12935656.25,y:4827187.5},
//{x: },
{x:12936375,y:4827593.75},
{x:12936250,y:4828437.5},
{x:12936468.75,y:4830000},
{x:12936156.25,y:4830062.5},
{x:12935031.25,y:4831312.5},
{x:12933843.75,y:4833156.25},
{x:12933187.5,y:4833718.75},
//{x: },
{x:12933000,y:4836031.25},
{x:12932406.25,y:4836312.5},
{x:12931250,y:4835125},
{x:12930937.5,y:4836718.75},
{x:12929968.75,y:4836437.5},
{x:12928843.75,y:4837406.25},
{x:12930906.25,y:4838437.5},
{x:12931250,y:4839375},
{x:12928375,y:4842031.25}]
}
~~~
有了坐标,再结合上面的关键代码,写一个在地图上绘制边界的funciton:
~~~
//加载边界
function addbound(){
var triangleCoords = [];
for(var i=0;i<b.length;i++){
triangleCoords.push(new sogou.maps.Point(b[i].x,b[i].y));
}
var bermudaTriangle = new sogou.maps.Polygon({
path: triangleCoords,
strokeColor: "#7CCD7C",
strokeOpacity: 0.8,
strokeWeight: 3,
fillColor: "#7CFC00",
fillOpacity: 0.35
});
bermudaTriangle.setMap(map);
}
~~~
这样只要调用一下即可在地图上绘制出海淀区的边界了。
# 2.更换Marker动态图片
这个就很简单了,如果忘记了,只要回头看看《[GIS(一)——在js版搜索地图上添加Marker标记](http://blog.csdn.net/xiaoxian8023/article/details/38855281)》这篇文章,就可以完成了。其实就是在生成Marker的时候,设定image参数即可。要设置的动态图片如下:
![](https://box.kancloud.cn/2016-01-14_56971cc9d3dbf.jpg)
修改的addmarker方法如下(我把图片放到网上了):
~~~
//加载标记
function addmarker(){
for(var i=0;i<p.length;i++){
var point = new sogou.maps.Point(p[i].x,p[i].y);
//添加一个图标
var image = 'http://mfxuan.free.800m.net/blogImage/red.gif';
var marker = new sogou.maps.Marker({
position: point,
map: map,
title:p[i].title,
icon:image,
visible:true
});
markers.push(marker);
}
}
~~~
# 3.更换Brand半透明图片
这个也很简单,如果忘记的话,看这篇文章《[GIS(二)——在js版搜狗地图上添加brand标牌](http://blog.csdn.net/xiaoxian8023/article/details/38921763)》。由于上次设定了指向不同景点,看起来非常乱,所以我决定还是通知箭头朝上。修改的图片如下:
![](https://box.kancloud.cn/2016-01-14_56971cc9e1395.jpg)
修改一下addbrand方法,将参数设定为get_up_spirit(),同时先就爱那个visible设为false,后面会讲到。
~~~
//加载标记牌
function addbrand(){
for(var i=0;i<p.length;i++){
var brand = new sogou.maps.Brand({
position: new sogou.maps.Point(p[i].x,p[i].y),
map: map,
spirit:get_up_spirit()
,content:p[i].title+"<br /> 城市:北京市"
//是否可见,可缺省,缺省为true
,visible:false
//指定内容区固定宽度为80,如果不指定,则会根据内容大小自动适应
,fixSize:new sogou.maps.Size(80,0)
//指定css,css要在样式表事先定义好
,css:"brand"
});
brands.push(brand);//将生成的brand,加入到brands数组中
}
}
~~~
同时修改get_up_spirit方法,设定背景图片,而且调整anchor下移7个像素。这是因为修改了marker的图片了,为了防止相互遮挡,将图片整体下移。
~~~
//箭头向上
function get_up_spirit(){
var spirit={
url:"http://mfxuan.free.800m.net/blogImage/22.png",
imgSize:[140,87],
clips:[[0,0,8,51],[8,0,1,51],[132,0,8,51],[105,53,33,13]],
anchor:[17,-7],
footOffset:[0,-63]
}
return spirit;
}
~~~
# 4.设定标牌切换
标牌统一向上,相互之间肯定是遮挡了。所以为了避免遮挡显得凌乱,可以每次只显示一个brand的信息,几秒之后切换一下。这样就完美解决了前面遇到的问题。
修改方法很简单,在addbrand方法中,把所有的brand的visible设为false,添加一个changeView方法,去动态更改brand的visible属性,或者直接调用hide()和show()来控制显示即可:
~~~
//显示某个景点的内容
function changeView(){
//由于new Brand的时候,visible=false,div被隐藏了,所以将所有brand的div都显示出来
$(".brand").parent().parent().css("display","block");
//切换标牌
for(var i=0;i<brands.length;i++){
brands[i].setZIndex(15);
brands[i].hide();//所有隐藏
}
if(brandId<brands.length){
brands[brandId].show();//显示
brands[brandId].setZIndex(20);
brandId = (brandId+1) % brands.length;
}
}
~~~
当然要先定义一个变量来存储当前显示的brand是哪个:
~~~
var brandId=0;//记录当前显示的brand
~~~
最后修改一下初始化方法initialize,把添加上的方法都在这里面进行调用:
~~~
//初始化数据
function initialize() {
//将地图定位在海淀区域
var point = new sogou.maps.Point(12939000,4840250);
var myOptions = {
zoom: 11,
center: point
}
//加载并初始化地图
map = new sogou.maps.Map(document.getElementById("map_canvas"), myOptions);
//加载景点坐标值
loadScenic();
//加载边界坐标值
loadBound();
//加载景点标记
addmarker();
//添加景点标牌
addbrand();
//立即显示一个
changeView();
//每隔3秒,切换景点显示
setInterval(changeView,1000*3);
//加载边界
addbound(map);
}
~~~
整个效果图就出来了:
![](https://box.kancloud.cn/2016-02-18_56c53c23b93a8.jpg)
([点击这里到网站上查看](http://mfxuan.free.800m.net/showmap.html))
到此js版搜狗地图的2个简单功能就介绍完毕了。接下来我会再做一个交互查询的功能,尽请期待。