我使用dojo 1.8 版创建了一个简单的柱形图,我想为每一列的鼠标悬停添加高亮效果。
Dojo 的 dojox 图表 API 提供了一个名为 Highlight 的好类,您应该能够实例化注入图表实例和绘图名称,如下所示...
new Highlight(ChartInstance, "plotName");
这是支持这一点的文档:
http://dojotoolkit.org/reference-guide/1.8/dojox/charting.html#highlight
http://dojotoolkit.org/api/1.8/dojox/charting/action2d/Highlight
http://dojotoolkit.org/documentation/tutorials/1.8/charting/
现在我已经遵循了这个语法,但还没有让效果起作用,并且在 firebug 中没有报告任何脚本错误。这是我的测试页面...
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Test chart</title>
<script>
var dojoConfig = {
baseUrl: "./",
async: true,
isDebug: true,
parseOnLoad: true,
gfxRenderer: "svg, canvas, silverlight",//svg is preferred chart renderer
//here are the packages dojo will be aware of and related js files
packages: [
//dojo specific packages
{name: "dojo", location: "libs/dojo"},
{name: "dojox", location: "libs/dojox"}
]
};
</script>
</head>
<body>
<!-- create the chart div-->
<div id="chartContent"></div>
<!-- load dojo and provide config via header script -->
<script src="libs/dojo/dojo.js"></script>
<script>
require(["dojo/parser", "dojo/domReady!"]);
require([
"dojox/charting/Chart",
"dojox/charting/themes/Claro",
"dojox/charting/plot2d/Columns",
"dojox/charting/axis2d/Default",
"dojox/charting/action2d/Highlight",
"dojo/domReady!"
],
function (Chart, Theme, ChartType, Default, Highlight){
chartData = [
{ x: 1, y: 19021 },
{ x: 2, y: 12837 },
{ x: 3, y: 12378 },
{ x: 4, y: 21882 },
{ x: 5, y: 17654 },
{ x: 6, y: 15833 },
{ x: 7, y: 16122 }
];
var chart = new Chart("chartContent", {title: "test bar chart"});
chart.setTheme(Theme);
chart.addPlot("barPlot", {type:ChartType, interpolate: false, tension: "S", markers: true, hAxis: "x", vAxis: "y"});
chart.addAxis("x", {title: "horizontal axis", titleOrientation: "away", min:0});
chart.addAxis("y", {title: "vertical axis", vertical: true});
chart.addSeries("bar series", chartData, {plot: "barPlot"});
new Highlight(chart, "barPlot");
chart.render();
}
);
</script>
</body>
</html>
要运行该页面,您需要调整 dojo 和 dojox 位置以匹配您自己的设置,您还可以通过在配置中交换每个的完整 URL 来指向它们的在线版本。
当您在浏览器中加载它时,您应该会看到一个柱形图,并注意到高亮实例对每一列的鼠标悬停没有影响。
任何想法,也许我在这里错过了一些简单的东西?