Implementing the effect of Baidu map ABCD marker based on OL2

Home

Web Front-end

JS Tutorial

Implementing the effect of Baidu map ABCD marker based on OL2_javascript skills

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 03:37 PM

Overview of this article:

As mentioned above, the marker effect of Baidu Map ABCD is implemented in Arcgis for JS. In this article, we will describe how to achieve similar effects in OpenLayers2.

The renderings are shown below:

For the sake of visualization, the effect will be posted first.

Linked display

Things:

1. Interaction between list and map

When the mouse passes over the list, the list icon is modified and a blue marker is drawn on the map based on the value returned by the list; when the mouse is moved out, the list icon is modified to red and the map marker layer is cleared.

Key code:

title.on("mouseover",function(){ 
  var i = $(this).attr("i"); 
  $("#img"+i).attr("src","img/blue.png"); 
  var data = $(this).data("attr"); 
  var hpt = new OpenLayers.LonLat(data.x,data.y); 
  var hicon = new OpenLayers.Icon('img/blue.png',size,offset); 
  hMarker = new OpenLayers.Marker(hpt,hicon); 
  markerLyr.addMarker(hMarker); 
  showName(hpt,data.name,"item-label-name"); 
}); 
title.on("mouseout",function(){ 
  var i = $(this).attr("i"); 
  $("#img"+i).attr("src","img/red.png"); 
  markerLyr.removeMarker(hMarker); 
  hlabelLyr.clear(); 
}); 
title.on("click",function(){ 
  var data = $(this).data("attr"); 
  showInfowindow(data.name,data.desc); 
});

Copy after login

2. Interaction between map and list

When the mouse passes over the red marker on the map, the corresponding list icon is modified and the red marker picture is changed to blue; when the mouse is moved out, the corresponding list icon is modified and the marker is changed to red.

Key code:

marker.events.register("click", feature, function(e){ 
  var data = e.object.attr; 
  showInfowindow(data.name,data.desc); 
}); 
marker.events.register("mouseover", feature, function(e){ 
  map.layerContainerDiv.style.cursor = "pointer"; 
  var id= e.object.id; 
  $("#img"+id).attr("src","img/blue.png"); 
  $("#li"+id).css("background","#f2f2f2"); 
  var data = e.object.attr; 
  var hpt = new OpenLayers.LonLat(data.x, data.y); 
  showName(hpt,data.name,"item-label-name-map"); 
}); 
marker.events.register("mouseout", feature, function(e){ 
  map.layerContainerDiv.style.cursor = "url(" 
    + OpenLayers.Util.getRootPath() 
    + "img/pan.cur),default"; 
  var id= e.object.id; 
  $("#img"+id).attr("src","red.png"); 
  $("#li"+id).css("background","#ffffff"); 
  hlabelLyr.clear(); 
}); 
markerLyr.addMarker(marker); 
var label = new OpenLayers.Label(pt,i+1,"item-label"); 
labelLyr.add(label);

Copy after login

3. The numbers 1, 2, 3, 4... etc. on the map are a label layer and do not participate in linkage;

4. The data is transmitted in the form of JSON. In this example, it is dynamically generated based on the four directions of the map, as follows:

function getRandomXY(){ 
  var json = new Array(); 
  for(var i=0;i<8;i++){ 
    var w = bounds.getWidth(); 
    var h = bounds.getHeight(); 
    var x = Math.random() * w + bounds.left; 
    var y = Math.random() * h + bounds.bottom; 
    json.push({ 
      id:i, 
      name:"name"+i, 
      desc:"this is the name"+i, 
      x:x, 
      y:y 
    }) 
  } 
  return json; 
}

Copy after login

The complete code is as follows:

<!DOCTYPE html> 
<html> 
<head lang="en"> 
  <meta charset="UTF-8"> 
  <title>openlayers map</title> 
  <link rel="stylesheet" type="text/css" href="http://localhost/olapi/theme/default/style.css"/> 
  <style> 
    html, body, #map{ 
      padding:0; 
      margin:0; 
      height:100%; 
      width:100%; 
      overflow: hidden; 
      font-size: 12.5px; 
      font-family:"宋体" 
    } 
    .item-list{ 
      position: absolute; 
      top:100px; 
      left: 20px; 
      z-index: 999; 
      border: 1px solid #ccc; 
      width: 200px; 
      background: #fff; 
    } 
    .list-close{ 
      background: url("img/panel_tools.png"); 
      width: 16px; 
      height: 16px; 
      float: right; 
      margin: 3px 3px; 
      background-position: -16px 0px; 
    } 
    .list-close:hover{ 
      cursor: pointer; 
    } 
    .list-title{ 
      background: #009dda; 
      color: #fff; 
      padding: 5px 8px; 
      font-weight: bold; 
    } 
    ul{ 
      list-style: none; 
      margin: -0px 0; 
    } 
    ul li{ 
      border-bottom: 1px dotted #eee; 
      margin-left: -40px; 
      margin-top: 5px; 
      position: relative; 
    } 
    ul li:hover{ 
      background: #f2f2f2; 
    } 
    .item{ 
      padding: 2px 5px; 
    } 
    .item:hover{ 
      cursor: pointer; 
    } 
    .item-num{ 
      position: absolute; 
      top: 4px; 
      left: 12px; 
      color:#fff; 
      font-size: 15px; 
      font-weight: bold; 
    } 
    .item-title{ 
      float: right; 
      font-weight: bold; 
      margin-right: 10px; 
    } 
    .item-content{ 
      padding: 3px 5px; 
    } 
    .item-detail{ 
      margin: 3px 5px; 
      float: right; 
    } 
    .item-detail:hover{ 
      text-decoration: underline; 
      color: #01A4F8; 
      cursor: pointer; 
    } 
    .item-label{ 
      color:#fff; 
      font-size: 15px; 
      font-weight: bold; 
      margin-top: 2px; 
      margin-left: 7px; 
    } 
    .item-label-name,.item-label-name-map{ 
      border:1px solid #a6c9e2; 
      background: #fff; 
      padding: 3px 5px; 
      font-size: 12px; 
      margin-top: 23px; 
      margin-left: 15px; 
      border-radius: 5px; 
    } 
    .item-label-name-map{ 
      margin-left: 25px; 
    } 
  </style> 
  <!--引入jquery 库 --> 
  <script type="text/javascript" src="http://localhost/olapi/OpenLayers.js"></script> 
  <script type="text/javascript" src="http://localhost/olapi/lib/OpenLayers/Lang/zh-CN.js"></script> 
  <script src="http://localhost/jquery/jquery-1.8.3.js"></script> 
  <script src="extend/LabelLayer.js"></script> 
  <script> 
    var map; 
    var tiled; 
    $(window).load(function() { 
      var bounds = new OpenLayers.Bounds( 
          87.57582859314434, 19.969920291221204, 
          126.56713756740385, 45.693810203800794 
      ); 
      var options = { 
        controls: [], 
        maxExtent: bounds, 
        maxResolution: 0.1523098006807012, 
        projection: "EPSG:4326", 
        units: 'degrees' 
      }; 
      map = new OpenLayers.Map('map', options); 
      map.addControl(new OpenLayers.Control.Zoom()); 
      map.addControl(new OpenLayers.Control.Navigation()); 
      map.addControl( new OpenLayers.Control.MousePosition()); 
      var tiled = new OpenLayers.Layer.WMS( 
          "province", "http://localhost:8088/geoserver/lzugis/wms", 
          { 
            "LAYERS": 'province', 
            "STYLES": '', 
            format: 'image/png' 
          }, 
          { 
            buffer: 0, 
            displayOutsideMaxExtent: true, 
            isBaseLayer: true, 
            yx : {'EPSG:4326' : true} 
          } 
      ); 
      var markerLyr = new OpenLayers.Layer.Markers("marker"); 
      var labelLyr = new OpenLayers.Layer.Labels("label"); 
      var hlabelLyr = new OpenLayers.Layer.Labels("hlabelLyr"); 
      map.addLayers([tiled,markerLyr,labelLyr,hlabelLyr]); 
      map.zoomToExtent(bounds); 
 
      var data = getRandomXY(); 
      console.log(data); 
      var ul = $("#items"); 
      var size = new OpenLayers.Size(24,26); 
      var offset = new OpenLayers.Pixel(0, 0); 
      var hMarker=null; 
      for(var i=0;i<data.length;i++) { 
        /** 
         * 地图内容 
         */ 
        var pt = new OpenLayers.LonLat(data[i].x, data[i].y); 
        var icon = new OpenLayers.Icon('img/red.png',size,offset); 
        var feature = new OpenLayers.Feature(markerLyr, 
            pt, 
            {'icon': icon,'attr':data[i]}); 
        var marker = feature.createMarker(); 
        marker.attr = data[i]; 
        marker.id = i; 
        marker.events.register("click", feature, function(e){ 
          var data = e.object.attr; 
          showInfowindow(data.name,data.desc); 
        }); 
        marker.events.register("mouseover", feature, function(e){ 
          map.layerContainerDiv.style.cursor = "pointer"; 
          var id= e.object.id; 
          $("#img"+id).attr("src","img/blue.png"); 
          $("#li"+id).css("background","#f2f2f2"); 
          var data = e.object.attr; 
          var hpt = new OpenLayers.LonLat(data.x, data.y); 
          showName(hpt,data.name,"item-label-name-map"); 
        }); 
        marker.events.register("mouseout", feature, function(e){ 
          map.layerContainerDiv.style.cursor = "url(" 
            + OpenLayers.Util.getRootPath() 
            + "img/pan.cur),default"; 
          var id= e.object.id; 
          $("#img"+id).attr("src","red.png"); 
          $("#li"+id).css("background","#ffffff"); 
          hlabelLyr.clear(); 
        }); 
        markerLyr.addMarker(marker); 
        var label = new OpenLayers.Label(pt,i+1,"item-label"); 
        labelLyr.add(label); 
        /** 
         * 列表内容 
         */ 
        var li = $("<li />").attr("id","li"+i).appendTo(ul); 
        var title = $("<div />").addClass("item").attr("i",i).data("attr",data[i]); 
        var img = $("<img />").attr("id","img"+i).attr("src", "img/red.png")/*.attr("width", "16").attr("height", "18")*/; 
        var num = $("<a />").addClass("item-num").html(i+1); 
        var name = $("<div />").addClass("item-title").html(data[i].name); 
        title.append(img).append(num).append(name); 
        var content = $("<a />").addClass("item-content").html(data[i].desc); 
        var detail = $("<a />").addClass("item-detail").html("详细>>"); 
        li.append(title).append(content).append(detail); 
        title.on("mouseover",function(){ 
          var i = $(this).attr("i"); 
          $("#img"+i).attr("src","img/blue.png"); 
          var data = $(this).data("attr"); 
          var hpt = new OpenLayers.LonLat(data.x,data.y); 
          var hicon = new OpenLayers.Icon('img/blue.png',size,offset); 
          hMarker = new OpenLayers.Marker(hpt,hicon); 
          markerLyr.addMarker(hMarker); 
          showName(hpt,data.name,"item-label-name"); 
        }); 
        title.on("mouseout",function(){ 
          var i = $(this).attr("i"); 
          $("#img"+i).attr("src","img/red.png"); 
          markerLyr.removeMarker(hMarker); 
          hlabelLyr.clear(); 
        }); 
        title.on("click",function(){ 
          var data = $(this).data("attr"); 
          showInfowindow(data.name,data.desc); 
        }); 
      } 
 
      $(".item-list").draggable({ 
        handle:'.list-title' 
      }); 
      $("#close").on("click",function(){ 
        $(".item-list").hide(); 
      }); 
 
      function showName(pt,name,classname){ 
        var label = new OpenLayers.Label(pt,name,classname); 
        hlabelLyr.add(label); 
      } 
      function showInfowindow(title,content){ 
        $("<div />").window({ 
          width:200, 
          height:80, 
          modal:true, 
          maximizable:false, 
          minimizable:false, 
          collapsible:false, 
          closable:true, 
          title:title, 
          content:content 
        }); 
      } 
 
      function getRandomXY(){ 
        var json = new Array(); 
        for(var i=0;i<8;i++){ 
          var w = bounds.getWidth(); 
          var h = bounds.getHeight(); 
          var x = Math.random() * w + bounds.left; 
          var y = Math.random() * h + bounds.bottom; 
          json.push({ 
            id:i, 
            name:"name"+i, 
            desc:"this is the name"+i, 
            x:x, 
            y:y 
          }) 
        } 
        return json; 
      } 
    }); 
  </script> 
</head> 
<body> 
<div id="map"></div> 
  <div class="item-list"> 
    <div id="close" class="list-close"></div> 
    <div class="list-title">结果列表</div> 
    <ul id="items"> 
    </ul> 
  </div> 
</body> 
</html>

Copy after login

In this example, the layer Labels and object Labels of OpenLayers are extended.

The above is the entire description of this article, I hope you all like it.

Statement of this Website

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress images for free

Clothoff.io

AI clothes remover

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

What's New in Windows 11 KB5054979 & How to Fix Update Issues

3 weeks ago By DDD

How to fix KB5055523 fails to install in Windows 11?

2 weeks ago By DDD

InZoi: How To Apply To School And University

4 weeks ago By DDD

How to fix KB5055518 fails to install in Windows 10?

2 weeks ago By DDD

Roblox: Dead Rails – How To Summon And Defeat Nikola Tesla

4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Where is the login entrance for gmail email?

7832

Java Tutorial

1648

CakePHP Tutorial

1402

Laravel Tutorial

1300

PHP Tutorial

1240

Related knowledge

What should I do if I encounter garbled code printing for front-end thermal paper receipts? Apr 04, 2025 pm 02:42 PM

Frequently Asked Questions and Solutions for Front-end Thermal Paper Ticket Printing In Front-end Development, Ticket Printing is a common requirement. However, many developers are implementing...

Demystifying JavaScript: What It Does and Why It Matters Apr 09, 2025 am 12:07 AM

JavaScript is the cornerstone of modern web development, and its main functions include event-driven programming, dynamic content generation and asynchronous programming. 1) Event-driven programming allows web pages to change dynamically according to user operations. 2) Dynamic content generation allows page content to be adjusted according to conditions. 3) Asynchronous programming ensures that the user interface is not blocked. JavaScript is widely used in web interaction, single-page application and server-side development, greatly improving the flexibility of user experience and cross-platform development.

Who gets paid more Python or JavaScript? Apr 04, 2025 am 12:09 AM

There is no absolute salary for Python and JavaScript developers, depending on skills and industry needs. 1. Python may be paid more in data science and machine learning. 2. JavaScript has great demand in front-end and full-stack development, and its salary is also considerable. 3. Influencing factors include experience, geographical location, company size and specific skills.

Is JavaScript hard to learn? Apr 03, 2025 am 12:20 AM

Learning JavaScript is not difficult, but it is challenging. 1) Understand basic concepts such as variables, data types, functions, etc. 2) Master asynchronous programming and implement it through event loops. 3) Use DOM operations and Promise to handle asynchronous requests. 4) Avoid common mistakes and use debugging techniques. 5) Optimize performance and follow best practices.

How to achieve parallax scrolling and element animation effects, like Shiseido's official website? or: How can we achieve the animation effect accompanied by page scrolling like Shiseido's official website? Apr 04, 2025 pm 05:36 PM

Discussion on the realization of parallax scrolling and element animation effects in this article will explore how to achieve similar to Shiseido official website (https://www.shiseido.co.jp/sb/wonderland/)...

How to merge array elements with the same ID into one object using JavaScript? Apr 04, 2025 pm 05:09 PM

How to merge array elements with the same ID into one object in JavaScript? When processing data, we often encounter the need to have the same ID...

The Evolution of JavaScript: Current Trends and Future Prospects Apr 10, 2025 am 09:33 AM

The latest trends in JavaScript include the rise of TypeScript, the popularity of modern frameworks and libraries, and the application of WebAssembly. Future prospects cover more powerful type systems, the development of server-side JavaScript, the expansion of artificial intelligence and machine learning, and the potential of IoT and edge computing.

The difference in console.log output result: Why are the two calls different? Apr 04, 2025 pm 05:12 PM

In-depth discussion of the root causes of the difference in console.log output. This article will analyze the differences in the output results of console.log function in a piece of code and explain the reasons behind it. �...

See all articles