Exploring all chart in Visualforce page by using JavaScript Remoting & Google Charts API.

This post is all about how to draw a chart in Visual force page by using JavaScript Remoting & Google Charts API.

I had faced some requirement to draw a different types of chart in a visualforce page and also to display number of  distinct record for further reference. I had done some work around and finally I had reached to the final destination. Here I have created one object ChartObject__c and two field Name and Amount.

Here I am sharing some code snippet for your reference. 

<apex:page controller="GoogleChartsController" sidebar="false">

    <!-- Google API inclusion -->
    <apex:includeScript id="a" value="https://www.google.com/jsapi" />
    <apex:sectionHeader title="Google Charts + Javascript Remoting" subtitle="Demoing - Opportunities by Exepected Revenue"/> 
    
    <!-- Google Charts will be drawn in this DIV -->
    <div id="chartBlock"/>
    <div id="chartBlockpie"/>
    <div id="chartBlockline"/>
    <div id="chartBlockbar" />
    <div id="chartBlockgauge" />
     
    <script type="text/javascript">
     
// Load the Visualization API and the piechart package.
google.load('visualization', '1.0', {'packages':['corechart']});

// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(initCharts);

function initCharts() {   
  
// Following the usual Remoting syntax
// [<namespace>.]<controller>.<method>([params...,] 
//<callbackFunction>(result, event) {...}
// namespace : 
// controller : GoogleChartsController
// method : loadOpps
 
GoogleChartsController.loadOpps(
function(result, event){ 
 
// load Column chart
var visualization = new google.visualization.ColumnChart(document.getElementById('chartBlock'));

// Prepare table model for chart with columns
var data = new google.visualization.DataTable();
data.addColumn('string', 'Name');
data.addColumn('number', 'Amount');  
 
// add rows from the remoting results
for(var i =0; i<result.length;i++){
var r = result[i];
data.addRow([r.Name, r.Amount__c]);
}
var chart = new google.visualization.PieChart(document.getElementById('chartBlockpie'));
chart.draw(data, result);
 
var chart = new google.visualization.LineChart(document.getElementById('chartBlockline'));
chart.draw(data, result);
 
var chart = new google.visualization.BarChart(document.getElementById('chartBlockbar'));
chart.draw(data, result);
 
/*var chart = new google.visualization.ScatterChart(document.getElementById('chartBlockscater'));
chart.draw(data, result);*/
 
var chart = new google.visualization.GaugeChart(document.getElementById('chartBlockgauge'));
chart.draw(data, result);
 
// all done, lets draw the chart with some options to make it look nice.
visualization.draw(data, {legend : {position: 'top', textStyle: {color: 'blue', fontSize: 10}}, width:window.innerWidth,vAxis:
{textStyle:{fontSize: 10}},hAxis:{textStyle:{fontSize: 10},showTextEvery:1,slantedText:false}});


  },{escape:true});
 }
       </script>
    <p>Total Different Kind Of Production:<apex:outputText value="{!totalvalue}"/></p>
</apex:page>

My controller

global with sharing class GoogleChartsController {

public Integer totalvalue{get;set;}

    public GoogleChartsController() {

   

// Integer totalvalue;

list<AggregateResult>  Namecount=new List<AggregateResult>();

Namecount= [select  COUNT_DISTINCT(Amount__c) ctr from ChartObject__c];

        for(AggregateResult sobj:Namecount){

          

totalvalue=Integer.valueOf(sobj.get('ctr'));

        }

        System.debug('################asish####################'+totalvalue);

   } 

    

    /**

      Loads most recent 10 Opportunities

    */

    @RemoteAction   

    global static ChartObject__c[] loadOpps() {

       

        return  [select Id, Name, Amount__c from ChartObject__c  order by CreatedDate DESC limit 10];

       

    }  

}

Here I am sharing some image regarding chart.