/**
* Builds the template variables from the chart.
*
* @since 3.0.0
* @access private
* @return string Javascript code block.
*/
private function getTemplateVars()
{
$chart = $this->chart;
// Workaround for no :: on member vars in php5.4
$vars = ['chartLabel' => (string) $chart->getLabel(), 'chartType' => $chart::TYPE, 'chartVer' => $chart::VERSION, 'chartClass' => $chart::VIZ_CLASS, 'chartPackage' => $chart::VIZ_PACKAGE, 'chartData' => json_encode($chart->getDataTable()), 'chartOptions' => json_encode($chart->getOptions()), 'elemId' => (string) $this->elementId, 'dataVer' => DataTable::VERSION, 'dataClass' => DataTable::VIZ_CLASS, 'formats' => '', 'events' => ''];
if ($chart->getDataTable()->hasFormattedColumns()) {
$vars['formats'] = $this->buildFormatters();
}
if ($this->chart->hasEvents()) {
$vars['events'] = $this->buildEventCallbacks();
}
return $vars;
}
/**
* Builds the Javascript code block
*
* Build the script block for the chart. If there are any events defined,
* they will be automatically be attached to the chart and
* pulled from the callbacks folder.
*
* @access private
*
* @return string Javascript code block.
*/
private function buildChartJs()
{
$out = $this->jsO . PHP_EOL;
/*
* If the object does not exist for a given chart type, initialise it.
* This will prevent overriding keys when multiple charts of the same
* type are being rendered on the same page.
*/
$out .= sprintf('if ( typeof lava.charts.%1$s == "undefined" ) { lava.charts.%1$s = {}; }', $this->chart->type) . PHP_EOL . PHP_EOL;
//Creating new chart js object
$out .= sprintf('lava.charts.%s["%s"] = {chart:null,draw:null,data:null,options:null,formats:[]};', $this->chart->type, $this->chart->label) . PHP_EOL . PHP_EOL;
//Checking if output div exists
$out .= sprintf('if (!document.getElementById("%1$s"))' . '{console.error("[Lavacharts] No matching element was found with ID \\"%1$s\\"");}', $this->elementId) . PHP_EOL . PHP_EOL;
$out .= sprintf('lava.charts.%s["%s"].draw = function() {', $this->chart->type, $this->chart->label) . PHP_EOL;
$out .= sprintf('var $this = lava.charts.%s["%s"];', $this->chart->type, $this->chart->label) . PHP_EOL . PHP_EOL;
$out .= sprintf('$this.data = new google.visualization.DataTable(%s, %s);', $this->chart->datatable->toJson(), $this->googleDataTableVer) . PHP_EOL . PHP_EOL;
$out .= sprintf('$this.options = %s;', $this->chart->optionsToJson()) . PHP_EOL . PHP_EOL;
$out .= sprintf('$this.chart = new google.visualization.%s(document.getElementById("%s"));', $this->getChartPackageData('jsObj'), $this->elementId) . PHP_EOL . PHP_EOL;
if ($this->chart->datatable->hasFormats()) {
$out .= $this->buildFormatters();
}
if ($this->chart->hasEvents()) {
$out .= $this->buildEventCallbacks();
}
$out .= '$this.chart.draw($this.data, $this.options);' . PHP_EOL;
$out .= "};" . PHP_EOL . PHP_EOL;
$out .= sprintf("google.load('visualization', '%s', {'packages':['%s']});", $this->getChartPackageData('version'), $this->getChartPackageData('type')) . PHP_EOL;
$out .= sprintf('google.setOnLoadCallback(lava.charts.%s["%s"].draw);', $this->chart->type, $this->chart->label) . PHP_EOL;
$out .= sprintf('lava.register("%s", "%s");', $this->chart->type, $this->chart->label) . PHP_EOL;
if (self::DEBUG) {
$out .= 'console.debug(lava);';
}
$out .= $this->jsC . PHP_EOL;
return $out;
}
