Check documentation for the latest version of dhtmlxSuite Step 6. Provide Filtering Data by Years DHTMLX Docs

Step 6. Provide Filtering Data by Years

The next dynamic feature is filtering and we will add a possibility to filter input data by years.

We will provide 2 options:

  1. Displaying data for the all period (default view. No filtering)
  2. Displaying data for the last 5 years (filtering by years, where year>currentYear-5).

To implement this functionality, we need a little effort:

  • To add 2 more radio buttons to the form.
  • To check which radio button is checked.
  • If needed, to call the filter method of dhtmlxChart to filter the data.
To filter data displayed in the chart:
  1. Open the "data/form.xml " file and add the filtering controls there so the final file looks as in:

    "data/form.xml" file

    <?xml version="1.0"?>
        <item type="settings" position="label-right" offsetLeft="20" 
        <item type="block" width="230" offsetLeft="0">
            <item type="label" label="Show report for:" offsetLeft="0"/>
            <item type="radio" name="type" value="profits" label="Profits" 
            checked="true" />
            <item type="radio" name="type" value="losses" label="Losses"/>
            <item type="label" label="Use data for:" offsetLeft="0"/>         <item type="radio" name="filter" value="all_time" label="All period"        checked="true"/>        <item type="radio" name="filter" value="last5" label="Last 5 years"/>    </item>
  2. Switch to the "index.html " file and add filtering functionality there so the final file looks as in:

    "index.html" file

    form.attachEvent("onChange", function (id, value, state){
        var formValues = form.getFormData();   
        var field=(formValues.report_type == "profits"?"data2":"data3");
        if (formValues.filter == "last5") {         var currentYear = new Date().getFullYear();     //gets the current year           chart.filter(function(obj){             //filters the data in the chart               return obj.data0 >(currentYear-5);  //returns data for last 5 years         })     }                    chart.render();

Back to top