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calculate_image_display()

Description

Calculations width, height and margin-top property for resource image to display in ResourcePanel

Parameters

ColumnTypeDefaultDescription
$imagedata array
$img_url string
$display string
positive-int, array{'thumb_width': 'thumb_height': positive-int} $imagedata

Return

array Returns a tuple of width, height and margin

Location

include/render_functions.php lines 2911 to 2978

Definition

 
function calculate_image_display(array $imagedata, string $img_url, string $display="thumbs"): array
    {
    if(
        '' != $imagedata['thumb_width']
        && '' != $imagedata['thumb_height']
        && $imagedata['thumb_width'] > 0
        && $imagedata['thumb_height'] > 0
    )
        {
        $ratio = $imagedata["thumb_width"] / $imagedata["thumb_height"];   
        }
    else
        {
        $size = $img_url != "" ? getimagesize($img_url) : [];
        $ratio = isset($size[0]) ? $size[0] / $size[1] : 1;
        }
    
    switch($display)
        {
        case "xlthumbs":
            $defaultwidth = 320;
            $defaultheight = 320;
            break;

        case "thumbs":
            $defaultwidth = 200;
            $defaultheight = 200;
            break;

        case "list":
            $defaultwidth = 40;
            $defaultheight = 40;
            break;

        case "col":
            $defaultwidth = $imagedata['thumb_width'];
            $defaultheight = $imagedata['thumb_height'];
            break;

        default:
            $defaultwidth = 75;
            $defaultheight = 75;
            break;
        }

    if ($ratio > 1)
        {
        $width = $defaultwidth;
        $height = round($defaultwidth / $ratio);
        $margin = floor(($defaultheight - $height ) / 2);
        }
    elseif ($ratio < 1)
        {
        # portrait image dimensions
        $height = $defaultheight;
        $width = round($defaultheight * $ratio);
        $margin = floor(($defaultheight - $height ) / 2);
        }
    else
        {
        # square image or no image dimensions
        $height = $defaultheight;
        $width = $defaultwidth;
        $margin = "auto";
        }

    return array($width, $height, $margin);
    }

This article was last updated 17th November 2024 15:35 Europe/London time based on the source file dated 13th November 2024 14:05 Europe/London time.