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Advanced options

The previous topic learns how to setup common options of a chart. This topic explains how to customize the chart according to your needs.

 

The key idea is that you can setup absolutely all the options that are available in the Google chart library. All you need is to study the reference from Google and write a few lines of PHP code to set property values.

 

The function that is invoked for each chart on the page is defined as follows:

 

Signature:

function OnPrepareChart(Chart $chart)

 

Parameters:

$chart

An instance of the Chart class

getId()

Returns the identifier of the chart (unique among all charts on a page).

setOptions($array)

Sets chart options. Here $array is an associative array that stores all the options you want to apply to the chart.

 

Example 1:

To set the value of the property propName, use the following syntax:

 

$chart->setOptions(array(

       'propName' => 'Value',

 ));

 

To set the value of the property objectName.propName, use the following syntax:

 

$chart->setOptions(array(

       'objectName' =>  array('propName' => 'value'), 

 ));

 

Operating in the same way you can set any property provided by the library.

 

Example 2:

The following code is used in our demo application to customize the chart on the Players page:

 

if ($chart->getId() === 'height-by-avg-age') {

   $chart->setOptions(array(

       'height' => 400,

       'theme' => 'maximized',

       'legend' => array('position' => 'bottom'), 

       'hAxis' => array('format' => '0'),

   ));

}

 

Example 3:

The following code is used in our demo application to customize charts on the Teams->Home games and Teams->Away games pages:

 

$options = array(

    'colors' => array('#9ECC3C', '#CC3C3C'),

    'titleTextStyle' => array('fontSize' => 14),

);

if ($chart->getId() === 'overall-win-loss') {

    $chart->setOptions(array_merge($options, array(

        'chartArea' => array('width' => '70%', 'height' => '70%', 'top' => '18%'),

        'legend' => 'none',

    )));

} else if ($chart->getId() === 'win-loss-by-month') {

    $chart->setOptions(array_merge($options, array(

        'vAxis' => array('format' => '0'),

    )));

}



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