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<?php
/**
* Renders a bargraph
* @param string $key keyname of the x-axis
* @param array $row_names keynames for the data rows
* @param unknown $colors colors for the data rows
* @param unknown $data the data
*/
function bargraph($id, $key, $row_names, $colors, $data) {
$labels = [];
foreach ($data as $dataset) {
$labels[] = $dataset[$key];
}
$datasets = [];
foreach ($row_names as $row_key => $name) {
$values = [];
foreach ($data as $dataset) {
$values[] = $dataset[$row_key];
}
$datasets[] = [
'label' => $name,
'fillColor' => $colors[$row_key],
'data' => $values
];
}
return '<canvas id="' . $id . '" style="width: 100%; height: 300px;"></canvas>
<script type="text/javascript">
$(function(){
var ctx = $("#' . $id . '").get(0).getContext("2d");
var chart = new Chart(ctx).Bar(' . json_encode([
'labels' => $labels,
'datasets' => $datasets
]) . ');
});
</script>';
}
?>
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