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Ajay Malempati

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Chart and XML Data

Post Posted: Tue Jun 19, 2012 1:33 pm
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Hi .. Very new to YUI..

I am trying to get some info from the server.. but unable to render the chart.

The XML is from the same server as YUI lib..
<?xml version="1.0" encoding="UTF-8"?>
<Rowsets DateCreated="2012-05-22T16:09:29" EndDate="2012-05-22T13:03:55" StartDate="2012-05-22T13:03:55" Version="12.1.7 Build(47)">
<Rowset>
<Columns>
<Column Description="" MaxRange="1" MinRange="0" Name="Type" SQLDataType="1" SourceColumn="Type"/>
<Column Description="" MaxRange="1" MinRange="0" Name="Quantity" SQLDataType="1" SourceColumn="Quantity"/>
</Columns>
<Row>
<Type>Hyco</Type>
<Quantity>7</Quantity>
</Row>
<Row>
<Type>Coal</Type>
<Quantity>4</Quantity>
</Row>
***************************************************************

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>
Pie Chart Sample - Yahoo
</title>
<script src="/yui/build/yui/yui-min.js"></script>

<script>
// Create a new YUI instance and populate it with the required modules.
YUI().use("datasource-io", "datasource-xmlschema", "charts", function(Y) {

var myDataSource = new Y.DataSource.IO({source:"/###Test/Aj/FuelMix&OutputParameter=Output&Content-Type=text/xml"}),
myCallback = {
success: function(e){
alert(e.response);
},
failure: function(e){
alert("Could not retrieve data: " + e.error.message);
}
};

myDataSource.plug(Y.Plugin.DataSourceXMLSchema, {
schema: {
resultListLocator: "//Row",
resultFields: ["Type", "Quantity"]
}
});

myDataSource.sendRequest({
callback:myCallback
});

myDataSource.after("response", function() {
alert("loaded..")
// Instantiate and render the chart
var mychart = new Y.Chart({
dataProvider: myDataSource,
categoryKey: "Type",
render: "#mychart",
type: "Pie"
});
// End -- Instantiate and render the chart
}
);
});

</script>
</head>
<body style="font-family: Arial;border: 0 none;" >
<div id="mychart" style="width: 600px; height: 400px;"></div>
</body>
</html>

Tripp Bridges

YUI Developer

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Re: Chart and XML Data

Post Posted: Tue Jun 19, 2012 10:21 pm
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In YUI Charts, the dataProvider attribute needs to be an array of objects not a datasource instance.

Thanks,
Tripp

Todd Smith

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Re: Chart and XML Data

Post Posted: Wed Jun 20, 2012 11:33 am
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Why couldn't he just do
Code:
myDataSource.after("response", function(e) {
   alert("loaded..")
   // Instantiate and render the chart
   var mychart = new Y.Chart({
      dataProvider: e.response.results,
      categoryKey: "Type",
      render: "#mychart",
      type: "Pie"
});

since DS's response argument e.response.results is an Array of Objects?

Ajay Malempati

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Re: Chart and XML Data

Post Posted: Thu Jun 21, 2012 11:06 am
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Thank you for your replies :) ..

I thought the XML will be converted to array using the following ..

myDataSource.plug(Y.Plugin.DataSourceXMLSchema, {
schema: {
resultListLocator: "//Row",
resultFields: ["Type", "Quantity"]
}
});

Any other ideas?

Todd Smith

YUI Contributor

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Re: Chart and XML Data

Post Posted: Thu Jun 21, 2012 8:01 pm
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@princenani,

A few quick comments;
1. I don't think the XML snippet you provided is complete. I believe you need a closing </Rowset> and </Rowsets> tag at the bottom of your XML.
2. As an alternative to your 'after:response' method, you can also simply define your chart in the 'callback:success' function, where the e.response.results will hold the array of object data needed for the chart.
3. Your original code snippet included "type:'Pie'" with first letter capitalized; I think "pie" (lowercase) is required.

I reworked your original snippet into a working jsfiddle example at http://jsfiddle.net/blunderalong/cAe5f/. I had to mimic your DataSource IO (using a DataSource.Local) with the XML data snippet you provided by including the XML data as HTML markup because we don't have access to your server in jsfiddle.

A minor remark is that you should probably define "class='yui3-skin-sam'" on the <body> tag of your page, most YUI3 widgets and components require that. This might prevent future problems for you.

Todd

Nikhil Makhija

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Re: Chart and XML Data

Post Posted: Fri Jul 13, 2012 12:55 pm
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Hi Todd,

I tried using the same way you mentioned in the snippet but Pie chart is not getting rendered on the screen after executing this code, below is the data I am using -

XML -

<?xml version="1.0" encoding="utf-8"?>
<Rowsets DateCreated="2012-07-13T13:49:36" EndDate="2012-07-12T15:14:25" StartDate="2012-07-12T15:14:25" Version="12.0.12 Build(9)">
<Rowset>
<Columns>
<Column Description="" MaxRange="1" MinRange="0" Name="Month" SQLDataType="1" SourceColumn="Month"/>
<Column Description="" MaxRange="1" MinRange="0" Name="Value" SQLDataType="1" SourceColumn="Value"/>
</Columns>
<Row>
<Month>Jan</Month>
<Value>10</Value>
</Row>
</Rowset>
</Rowsets>

Java Script

var url = link providing me the mentioned XML

YUI().use("datasource-io","datasource-xmlschema","charts",function(Y){
var myData = new Y.DataSource.IO({source:url});

myData.plug(Y.Plugin.DataSourceXMLSchema, {
schema:{
resultListLocator:"//Row",
resultFields: ["Month" ,"Value"]
}
});

myData.sendRequest({callback:

{ success: function(e){


var pieGraph = new Y.Chart ({
render:"#chartpiebls",
categoryKey:"Month",
seriesKeys:["Value"],
dataProvider:e.response.results,
type:"pie",
seriesCollection:[
{
categoryKey:"Month",
valueKey:"Value"
}
]
});

} ,



failure:function(e)
{
alert("could not retrieved data :"+ e.error.message);
}}

});

});

Tripp Bridges

YUI Developer

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Re: Chart and XML Data

Post Posted: Mon Jul 16, 2012 9:17 am
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Please post a repo link or the actual data that is returned as e.response.results.

Thanks,
Tripp

Nikhil Makhija

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Re: Chart and XML Data

Post Posted: Wed Jul 18, 2012 9:35 pm
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Hi Tripp,

Sorry for the delayed response.. Well the problem is solved as it was not taking the array structure response in a right way needed for Pie chart from the XML as an input.

Thanks again ..

Regards
Nikhil
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