D3 choropleth 状态图数据更新按钮单击
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【中文标题】D3 choropleth 状态图数据更新按钮单击【英文标题】:D3 choropleth state map data update on button click 【发布时间】:2016-05-31 04:35:14 【问题描述】:我使用 d3、datamaps 和 topojson 创建了一个等值线状态图。我在单击按钮更改原始地图数据时遇到问题。首选方法是在更改函数中刷新原始地图的数据。相反,我让按钮执行功能消除包含地图的 div,然后重新创建 div,然后完全生成一个新地图(请参阅下面的代码)。这行得通,但我认为有一种更简单、更复杂的方式来刷新数据。任何帮助将不胜感激。
<!DOCTYPE html>
<html>
<head>
<script src='js/d3.min.js'></script>
<script src='http://d3js.org/topojson.v1.min.js'></script>
<script src='js/datamaps.all.min.js'></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.0/jquery.min.js"></script>
<style>
#mapheight:400px; width: 600px; border-style: solid; border-color:white;
#floating-panel1
position: absolute;
top: 10px;
left: 1%;
z-index: 5;
/*background-color: #fff;*/
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: 'Roboto','sans-serif';
line-height: 30px;
padding-left: 1px;
</style>
<script>
var costChange =
'AR':'fillKey':'heavy','Percentage':'236%',
'IL':'fillKey':'light','Percentage':'5%',
'IN':'fillKey':'medium','Percentage':'20%',
'KS':'fillKey':'heavy','Percentage':'76%',
'KY':'fillKey':'heavy','Percentage':'289%',
'MS':'fillKey':'heavy','Percentage':'110%',
'NC':'fillKey':'heavy','Percentage':'261%',
'TN':'fillKey':'heavy','Percentage':'57%',
'VA':'fillKey':'heavy','Percentage':'57%',
'WA':'fillKey':'medium','Percentage':'18%',
'WI':'fillKey':'medium','Percentage':'18%'
;
var rateChange = 'AL':'fillKey':'medium','Percentage':'10%',
'AR':'fillKey':'medium','Percentage':'16%',
'AZ':'fillKey':'light','Percentage':'7%',
'CO':'fillKey':'heavy','Percentage':'44%',
'CT':'fillKey':'heavy','Percentage':'132%',
'DE':'fillKey':'light','Percentage':'6%',
'FL':'fillKey':'heavy','Percentage':'62%',
'GA':'fillKey':'medium','Percentage':'17%',
'ID':'fillKey':'heavy','Percentage':'66%',
'IN':'fillKey':'light','Percentage':'4%',
'KS':'fillKey':'medium','Percentage':'11%',
'KY':'fillKey':'medium','Percentage':'24%',
'LA':'fillKey':'medium','Percentage':'25%',
'MA':'fillKey':'heavy','Percentage':'55%',
'MD':'fillKey':'heavy','Percentage':'28%';
//initialize map with cost data
var map;
$(document).ready(function()
map = new Datamap(
scope: 'usa',
element: document.getElementById('map'),
geographyConfig:
highlightBorderColor: '#bada55',
popupTemplate: function(geography, data)
return "<div class='hoverinfo'>" + geography.properties.name + ' %:' + data.Percentage + ' '
,
highlightBorderWidth: 3
,
fills:
'light': '#ffad99',
'medium': '#ff704d',
'heavy': '#ff3300',
defaultFill: '#ffebe6'
,
data:costChange
);
map.labels();
);
//button click removes map and recreated with cost data
function cstchng()
$("#map").remove();
$("#title").after("<div id='map'></div>");
map = new Datamap(
scope: 'usa',
element: document.getElementById('map'),
geographyConfig:
highlightBorderColor: '#bada55',
popupTemplate: function(geography, data)
return "<div class='hoverinfo'>" + geography.properties.name + ' %:' + data.Percentage + ' '
,
highlightBorderWidth: 3
,
fills:
'light': '#ffad99',
'medium': '#ff704d',
'heavy': '#ff3300',
defaultFill: '#ffebe6'
,
data:costChange
);
map.labels();
//button click removes map and recreated with rate data
function rtchng()
$("#map").remove();
$("#title").after("<div id='map'></div>");
map = new Datamap(
scope: 'usa',
element: document.getElementById('map'),
geographyConfig:
highlightBorderColor: '#bada55',
popupTemplate: function(geography, data)
return "<div class='hoverinfo'>" + geography.properties.name + ' %:' + data.Percentage + ' '
,
highlightBorderWidth: 3
,
fills:
'light': '#ffad99',
'medium': '#ff704d',
'heavy': '#ff3300',
defaultFill: '#ffebe6'
,
data:rateChange
);
map.labels();
</script>
</head>
<body>
<div id="floating-panel1">
<button type="button" onclick = "cstchng()">Cost Change</button>
<button type="button" onclick = "rtchng()">Range Change</button>
</div>
<div id="title"></div>
<div id="map"></div>
</body>
</html>
【问题讨论】:
【参考方案1】:我想我能帮上忙。在这种情况下,当您有一些冗余代码时,通常,正如您所提到的,有一种更简单的方法来完成任务。如果您查看documentation 和数据地图中的示例,您可以一一浏览它们以更好地了解地图构建过程的工作原理,它应该对任何未来的项目都有帮助。
我查看了他们的 choropleth 和 state label 示例,以了解如何执行此操作。定义 onclick
属性的方式没问题。你只需要渲染一次地图。要更新它,您可以使用他们的 .updateChoropleth()
方法,如 choropleth 示例中所示。此外,您似乎不需要 jQuery。出于某种原因,我过去在尝试同时使用 jQuery 和 d3 时遇到了一些问题。在大多数情况下,您可以使用 d3 完成所需的工作。这是关于 SO 的另一个问题的链接:What is the difference between D3 and jQuery?
我创建了一个 plunker,以便您可以看到我所做的输出。让我知道这是否是您想要做的:
http://plnkr.co/edit/Uaau983AQUbMoknZoROf?p=preview
这是我用来参考的代码:
<!DOCTYPE HTML>
<html>
<head>
<script src="//cdnjs.cloudflare.com/ajax/libs/d3/3.5.3/d3.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/topojson/1.6.9/topojson.min.js"></script>
<script src='datamaps.all.min.js'></script>
</head>
<body>
<button id="costChange" onclick='updateCost(costChange)'>Cost Change</button>
<button id="rateChange" onclick='updateCost(rateChange)'>Range Change</button>
<div id="container" style="position: relative; width: 500px; height: 300px;">
</div>
<script>
var election = new Datamap(
scope: 'usa',
element: document.getElementById('container'),
geographyConfig:
highlightBorderColor: '#bada55',
popupTemplate: function(geography, data)
return '<div class="hoverinfo">' + geography.properties.name + 'Percentage:' + data.electoralVotes + ' '
,
highlightBorderWidth: 3
,
fills:
'light': '#ffad99',
'medium': '#ff704d',
'heavy': '#ff3300',
defaultFill: '#ffebe6'
,
data:
);
election.labels();
var costChange =
'AR':'fillKey':'heavy','Percentage':'236%',
'IL':'fillKey':'light','Percentage':'5%',
'IN':'fillKey':'medium','Percentage':'20%',
'KS':'fillKey':'heavy','Percentage':'76%',
'KY':'fillKey':'heavy','Percentage':'289%',
'MS':'fillKey':'heavy','Percentage':'110%',
'NC':'fillKey':'heavy','Percentage':'261%',
'TN':'fillKey':'heavy','Percentage':'57%',
'VA':'fillKey':'heavy','Percentage':'57%',
'WA':'fillKey':'medium','Percentage':'18%',
'WI':'fillKey':'medium','Percentage':'18%'
;
var rateChange = 'AL':'fillKey':'medium','Percentage':'10%',
'AR':'fillKey':'medium','Percentage':'16%',
'AZ':'fillKey':'light','Percentage':'7%',
'CO':'fillKey':'heavy','Percentage':'44%',
'CT':'fillKey':'heavy','Percentage':'132%',
'DE':'fillKey':'light','Percentage':'6%',
'FL':'fillKey':'heavy','Percentage':'62%',
'GA':'fillKey':'medium','Percentage':'17%',
'ID':'fillKey':'heavy','Percentage':'66%',
'IN':'fillKey':'light','Percentage':'4%',
'KS':'fillKey':'medium','Percentage':'11%',
'KY':'fillKey':'medium','Percentage':'24%',
'LA':'fillKey':'medium','Percentage':'25%',
'MA':'fillKey':'heavy','Percentage':'55%',
'MD':'fillKey':'heavy','Percentage':'28%'
;
function updateCost(arg)
election.updateChoropleth(null, reset: true);
election.updateChoropleth(arg);
</script>
</body>
</html>
希望这会有所帮助,如果您有任何问题,请告诉我 :)
【讨论】:
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